An Interview with Tim Vasquez, Owner of Stormtrack: A Mesoscale Forecasting Expert Shares Reflections on the Past and Glimpses into the Future

Among the various weather-related forums extant today, Stormtrack has one of the longer—perhaps even the longest—track records. Not only so, but it also carries on a rich legacy begun in 1977 when pioneer storm chaser David Hoadley published the first Storm Track newsletter. The newsletter evolved into a magazine, the publishing torch passed on to veteran chaser Tim Marshall, and the print edition ultimately morphed into an online forum for chasers worldwide under the ownership of Tim Vasquez.

Like Stormtrack, Tim has a rich and varied background replete with experiences that range across the weather spectrum, from storm chasing to operational forecasting to education and more. From 1989 to 1998, Tim served as an Air Force meteorologist. As early as 1985, he developed weather analysis software tools, which eventually culminated in WeatherGraphix and Digital Atmosphere. He has also published a series of weather forecasting books, including Severe Storm Forecasting and the Weather Analysis and Forecasting Handbook. Tim’s resources and services—which include nowcasting and forecasting training for storm chasers—are available through his WeatherGraphics website.

Tim is obviously one very busy guy, not to mention one of the most recognized names in storm chasing circles. In this interview, he shares some fascinating, personal perspectives on storm chasing and mesoscale forecasting back in the day as well as today. Amid the cornucopia of forecasting tools and resources that are now available to chasers, it’s eye-opening to learn not only what existed over two decades ago, but also how determined and knowledgeable a person had to be in order to tap into it. And it’s exciting to consider some of the possibilities that the future has in store.

Enough of this introduction. I hope you’ll enjoy what follows.

Interview with Tim Vasquez

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Question: Owner of Stormtrack.org, the renowned, longstanding forum for storm chasers worldwide. Forecasting software developer, meteorological consultant, severe weather educator, author of a series of outstanding books on storm chasing and forecasting, professional nowcaster … you’ve covered pretty much every base there is, Tim, except for storm chasing tour guide. I don’t think anyone who’s been seriously involved in chasing for even a brief amount of time doesn’t recognize you as one of the gurus of operational forecasting.

In the midst of all that, one of the sides of you with which I think people are least familiar these days is who you are as a storm chaser. Yet unquestionably you’re an extremely seasoned chaser, one of the true veterans. So let’s talk about that part of you, beginning with how it all started. What first got you enamored with severe weather and tornadoes? Was there a defining moment, or moments, back in your formative years?

Tim: I would say the defining moment came in May 1985 when I was at the National Weather Service in Fort Worth. There were never any good forecasting books at the libraries and no Internet, and AMS publications were expensive. The NWS office there had a little reading room, so I used to go over there to sift through their technical library and page through their saved weather maps. One day while I was there, all hell broke loose in the Panhandle. The office didn’t have forecast responsibility in that area, but everyone was watching things closely with things like the Kavouras dial-up radars and phone calls.

That’s when I met Al Moller, whose enthusiasm was infectious. I was able to ask questions and follow what was going on without getting in the way. Another forecaster there gave me a regional surface map and invited me to analyze it.  After I was done, we all worked through my results. By the time I left that evening, Al had told me about Stormtrack and given me Tim Marshall’s phone number and also a small stack of NOAA tech memos, which he dug out of one of the offices.

That’s not to say I hadn’t had a similar experience, as I used to visit the weather station at Clark Air Base in the Philippines and learned the art of the skew-T there. But this particular NWS visit put me on the road to severe weather, chasing, and the art of mesoanalysis.

Q: How old were you when you went on your first storm chase? What were the circumstances and what was it like?

T: I was eighteen. I had spent an entire winter building up a severe weather library and wanted to get my feet wet on the very first slight-risk area of the year.

Unfortunately I was trying a bit too hard to build up credibility, so I did my chase under the guise of a small research project (me and a few friends, but mostly me). I even had a crude, instrumented TOTO box to place in front of an approaching tornado.

As you might suspect, this first chase was very early: mid-February. It was dark by 5:00 p.m., and a few hours later I was in a squall line south of Dallas. The only thing memorable that happened on that chase is that one of the spark plugs somehow came loose on an engine cylinder in my vehicle. I was out in the middle of nowhere, in the dark and the rain, and I puttered into an abandoned gas station. Fortunately, I had prepared for something like this thanks to Tim Marshall’s Texas Tech chase manual. In ten minutes, I fixed the problem and was heading home. That experience reinforced to me the value of carrying tools.

Sometime that year I also dropped the pretense of a chase team and just chased for the enjoyment and education. Many of my chases during the early years were with Glenn Robinson and Gene Rhoden.

Q: Today’s chasers have an incredible wealth of resources at their disposal. But you came up in a time when there was no Internet, no iPhones or laptops or GR3, no GPS, no HRRR or SREF, no computer-generated indices, none of the stuff that people today take for granted. Talk about how you went about forecasting and fining in a chase-day target back then.

T: Interestingly, back in the “old days,” the data was there if you knew how to be resourceful. A few of the dyed-in-the-wool hobbyists of the late 1970s, for example, took advantage of the era before telephone deregulation and were able to get the NOAA Weather Wire and even the same DIFAX feed that the NWS used.  Some of this was available for free on HF radio well into the 1980s, so with that and a one-hundred-pound fax machine which I managed to acquire for free, I was able to get basic model forecasts.

With computer modems, we did have a sort of pre-Internet experience. Hourly observations were not cheap, but I was able to get them from CompuServe or from a number of long-distance dialup sources. I have a huge binder of 1980s hand-plotted maps, but the drudgery of actually drawing the station plots was the main problem. And I saw what AFOS could do. This led me to develop several analysis programs for the Commodore 128 and later the PC (Digital Atmosphere by 1996) so that I could focus on the analysis.

The items we chronically lacked were raw upper air data, which could only be obtained from an expensive provider like Accu-Data; and satellite imagery, due to the sheer expense of adequate display technology. So I wasn’t able to practice the full range of mesoscale analysis techniques until 1989, when I started working in an actual weather station.

Q: When it comes to field experience, what were some of the things you learned early on about reading the sky, interpreting changing conditions, and, as Shane Adams has put it, “working a storm”?

T: Having a solid diagnosis of the atmosphere before you leave the house (or the motel room) is the key thing, because the atmosphere never plays out like you expect. By 11:00 a.m., you have to be completely grounded in what’s happening at the surface and aloft, not just at the target area but also throughout the entire region. There’s rarely any time or opportunity to figure it out all over again once you’re out there.

Also I learned that I can be the one to fill in the gaps in the diagnosis by stopping regularly to take a measurement—not to write in a logbook, but rather to make sure that the winds and moisture are in the ballpark of what I expect them to be.  There have been several times when I thought I was at a good spot along the dryline, but once I dragged out the sling psychrometer, I found the dewpoint to be something like 57 or 58 and wound up repositioning back to the east. Today’s mobile weather stations are excellent for this kind of thing, but visually reading the character of the sky and matching that up to your expectations from the morning diagnosis is still an essential skill.

Once near a storm, I found map-reading and positional awareness to be critical skills. Certainly anyone who’s chased along the Canadian or Red Rivers can attest to this. You not only need to be in the right location, but you also have to make sure you have a way out in case your navigation plan doesn’t work out. Having a good GPS display or a good map reader in the passenger seat is essential.

Q: Describe one or two of your most outstanding chase experiences.

T: Most of the 2000s put me at the desk running the Chase Hotline or helping to take care of my son, who was born in 2003, so a lot of my actual field experiences draw from the 1990s. The historical May 3, 1999, outbreak is definitely near the top. I chased with Gene Rhoden that day. I still have a memorable impression of watching the birth and growth of the storm that would later devastate parts of Oklahoma City. It soon produced tornadoes, but we lost it due to the road network. Then we joined with the Anadarko storm and saw a highly visible, eerie nighttime tornado near Dover.

Another outstanding chase experience that comes to mind is memorable in a different way. This was also in May 1999, I think May 16. I had targeted Crowell, Texas, and I drove the five hours there from Oklahoma City, arriving just in time to adjust westward and catch a tornado coming off the Caprock before it shrank and roped out. It was an average chase success, but in the passenger seat was my soon-to-be-wife, Shannon, on her fifth chase; and in the back was her lifelong best friend, Kathryn, who had just flown up from Houston hoping to see what a storm chase was like. It ended up being the first time either of them had seen a tornado. So this was a fantastic experience for us all, and the nighttime lightning display heading back home was just phenomenal.

Q: Nowadays, major chase days are characterized by a blizzard of live streams and a glut of Spotter Network icons on the radar screen. But you’re nowhere to be found in that mix. That seems to be the case with quite a few veteran chasers. My sense of it is, you want to chase in peace without having a bunch of tag-alongs intrude on your experience. How often do you actually make it out into the field to chase these days? When you head out, what do you seek in terms of the quality of your chase? How would you say your values and approach differ from those of younger chasers?

T: For a fortunate few, storm chasing will be a constant, lifelong activity. But work, school, and family are there too. All of us at one time or another have to deal with things like tightened budgets, a new baby, a new job away from the Plains, medical problems, family problems, car problems, new meteorological passions, new interests, and so on. They’ve caused many veterans to fade from sight, and I’ve dealt with some of those things myself.

But even if I’m not in the field, I’m following the chase day. I have an insatiable passion for forecasting. Who needs Sudoku and crosswords? A meteorological diagnosis is a tremendously awesome and dynamic puzzle, and I feel like I have a brain that not only specializes in unraveling these puzzles but has a kind of dopaminergic reaction to solving them. And there’s so much remote sensing data coming online, in terms of surface data, MADIS, profilers, satellite imagery, WSR-88D data, and now the new dual-polarization radars. I really feel like a kid in a candy store on a storm day, and I have to say I’d feel kind of disconnected being out in the field. It’s not really the end result that I want to see, but the underlying machinery.

So I think that the mesoscale aspect of the chase day, rather than the chase itself, is my calling. That’s not to say that I’m done with chasing. Our needy baby has grown up into a bright and independent kid, the Chase Hotline demands have abated, we’re back in Norman, and I’m always looking at the sky and taking weather photographs. Plus, I’m responsible for Stormtrack. So I probably will be out there again as early as this month. I have an iPad, so maybe I’ll get linked up with one of the networks, too.

Q: What excites you, and what concerns you, about the state of storm chasing today? How do you see it evolving in the next five or ten years?

T: The Internet is making an enormous impact. Ten years ago it simply gave us a way to share pictures and messages and helped to pipe data to our forecast desk. Today it’s providing a two-way street from the world to the storm base. It’s reaching out to more and more mobile devices and extending further into remote regions of the Great Plains. As a result, we’re already seeing a sort of fusion of spotting and chasing and another real-time channel in the warning process.

Furthermore, the Internet is global, so someone in Mongolia or Madagascar can share in the thrill of a tornado developing over empty rangeland near Dalhart as it happens. That’s mind-blowing.

Another development I’m expecting is growth in international chasing. Very few people have any idea of the significance of east India and Bangladesh’s supercells; I think they’re easily comparable to some of the storms we have on the Great Plains. The largest CAPE values I’ve ever seen have always been on the Calcutta soundings. That region is gradually improving its road network and mobile Internet, and real-time data options are just now coming into existence there.  The only limits, of course, are chase budgets and haze.

Back here in the United States, we’re certain to see new advances in forecasting with the new dual-polarization radar upgrades, and as we get experience with these radars and the body of scientific literature grows, I expect that warnings will become even better and that chasers will increasingly find themselves on the “right” storm. Those last fifty miles of the chase are still as critical as they were in 1980.

Q: If you could share three tips or words of advice with contemporary chasers, what would they be?

T: As follows:

  • Chasing: Hydroplaning and nighttime obstacles are the things that have put me in danger more than anything else. I’ve had a lot of close calls with cows basking on the road and downed power lines stretching across lanes. At 60 mph, there’s only a few seconds to react before your destiny either brings you home or into an obituary on Stormtrack.
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  • Forecasting: Diagnose the atmosphere—not necessarily hand-analyze, but sift through all of the observational charts and products before even looking at models. As humans, we tend to develop a bias in the first bits of evidence we see, so if we start with observed data, we bias our forecasts according to what’s actually happening in the atmosphere. My books and classes go into a lot of this.
  • .

  • Community: Support Stormtrack and help our beginners. Over the past couple of years, we’ve seen a fragmentation of the entire chaser community across the social media spheres—Twitter, Facebook, and so forth—which is not an ideal situation. The Stormtrack forum has always been the singular resource for promoting smart, safe, and cooperative chasing. Chasers are welcome to get their start elsewhere, if they wish, but if that happens, I worry there’ll be more anonymity out in the field and more unsafe behavior.

Q: When can we look for Mr. T’s next forecasting workshop in Stormtrack?

T: He’s down in Altus trying to get all the kids to stay in school. I’ll drag him out of there and maybe we’ll get one out this spring.

An Interview with Shane Adams, Part 2: Thoughts on Target Selection, Memories of the Greensburg Storm, and Reflections on Top Three Chases

In Part One of my interview with veteran storm chaser Shane Adams, Shane recalled his formative years as a chaser in a simpler time when laptops, mobile data, and the media hadn’t transformed the landscape of storm chasing.

Part Two begins with several questions that deal with more pragmatic matters of forecasting and target selection. From there, Shane recalls his experience with the deadly May 4, 2007, Greensburg supercell. It’s a unique perspective on the storm in its post-Greensburg phase as it continued to spin off massive, violent wedges, and Shane’s account includes a haunting encounter with Macksville police officer Tim Buckman shortly before he was fatally injured by one of the tornadoes.

Finally, Shane reflects on the top three chases of his career and tells why he considers them so.

Question: I just finished listening to an interview with David Hoadley on the High Instability podcast, and I was struck by the similarity between some of what he had to say and your own comments [in response to my last question in Part One]. Realistically, chasing continues to evolve; yet I resonate with your gratitude for having come up in a simpler time when there was nothing to detract from the supreme value of the storm and the sky. I’d imagine—correct me if I’m wrong—that today you use at least a laptop and GR3 on your chases. But I get that you’re a minimalist at heart. Let’s talk about what a chase looks like for you these days. First, what is your process for forecasting? What things do you look for in picking your target?

Shane: These days, I use the same computer models all other chasers use. Within that, of course, there are several different sources. Personally, I use the College of Dupage computer model website. The reason why is, most model pages use CONUS maps. I don’t like CONUS maps because they make individual states and regions too small for detailed analysis in my opinion. CoD uses regional maps, which are much easier to analyze down to the mesoscale and even microscale level. It’s important for me to be able to recognize a specific area within a state while looking at model data, so I can overlay in my head the actual spot where I believe all the ingredients will come together. Looking at a CONUS map, I might be able to say, “Yeah, southwest Oklahoma looks good,”  but I can’t tell exactly where in southwest Oklahoma I need to be. The difference between a career day and a bust can be as little as twenty or thirty miles, something that is impossible to pinpoint using CONUS maps. So definitely College of Dupage is my forecasting lifeblood. When their site is down, I am not happy LOL.

As far as a target is concerned, again, I’m pretty much like everyone else. You want the basic four of course: moisture, instability, wind shear, and a source of lift. I tend to gravitate toward instability, with slightly less attention to wind shear. I’ve not had much luck chasing highly dynamic systems with low instability, so those are a big turnoff for me when looking at a forecast. Also, those type setups typically have very fast storm motions, making chasing more difficult. With more focus on instability and less on wind shear, I try to find an area with the most explosive potential for upward motion in a place where storm speeds won’t be as fast (lack of intense shear). Of course this dream scenario rarely unfolds in reality as often as I’d like, but in any chase setup, I will always first target the area of greatest instability and fine-tune from there based on other parameters.

Q: If you were to head out into the field without the benefit of Internet, equipped only with your morning forecast and the knowledge you’ve gained over the years, how would situational awareness inform your decisions as the afternoon progressed? In other words, how might simply looking at the sky or observing changing conditions tell you that you’re in the right spot—or, conversely, that you need to move?

S: One built-in advantage of cutting your chasing teeth in central Oklahoma is, 99 percent of the time the dryline is west of you. This means that you wake up in the warm sector on most days and simply have to drive west until the clouds thin out.

Drylines are marked visually by a sharp decrease in cloud coverage, vertical height, and base level. Bases will rise, tops will flatten, and the overall number of clouds will decrease as you approach the dryline. This was one of the first lessons I learned; the scenario was nearly automatic each time I chased because I never woke up on the dry side of the dryline.

Warm fronts are perhaps even more pronounced visually, as north of them on many chase days, there will be a solid overcast of low clouds. These clouds begin to thin as you near the warm front, and then as you move south there are fewer and fewer clouds until you’re in clear sunshine—plus whatever early-bird towers are trying to build in the warm sector.

My targets usually put me near either a dryline or warm front, so my biggest visual clues are simply watching how clouds behave.

Q: Storms are firing and you’ve got multiple options. Without using radar, how would you determine which storm you’ll go after?

S: Usually when faced with having to choose from multiple storms, it’s right after initiation, and every storm has the same potential to become tornadic. Because of this, I almost always opt for the storm I have the best position or approach angle on. Sometimes it works, sometimes it doesn’t.

In other situations where you’re a good distance from the storms and they’re in different directions from you, you have to analyze the situation more closely based on storm history and the immediate environment. If, for instance, I’m thirty miles south of the triple point, and I have a storm north of me right on the triple point and another one forty miles south of me, then I have to consider certain things and do a quick pro/con list for each storm in my head: the north storm is closer, but it’s moving away … the south storm is farther away, but it’s moving towards me … but the north storm will have better helicity sitting right on the warm front, so there’s a better chance it could produce a tornado … but it could also cross the warm front into the cool side and become elevated before I get to it … so the south storm seems like the way to go … but I’m going to have to punch through the entire core to get a view … these are not easy decisions, and they must be made quickly. I’ve been right, I’ve been wrong, but the worst situation is when you’re indecisive and end up missing both because you took too long to commit to one or the other. I’m much better off just sticking to my target, driving there, and letting the situation unfold … instead of just driving to a general area and waiting until after initiation to pick a storm.

Q: You were among those who chased the Greensburg storm. Describe your experience.

S: In all reality, we busted on this day. By dusk, we were well north of the Greensburg storm as it developed, and had already thrown in the towel and stopped for food. Because I chase to get good tornado video, I always quit after dark unless I’m already on a tornadic storm. So we’d been sitting in the Great Bend Pizza Hut drowning our sorrows with a large Meat Lover’s and Bud Light.

On a whim, Mick Ptak, the friend I was chasing with, had decided to bring his laptop inside “just in case” to watch the radar. We’d never done this before, so the fact that he’d chosen this night was, in hindsight, very lucky and ironic; if he hadn’t done so, we’d have sat there eating and missed the entire event. Or even worse, been in the path of more deadly storms well after dark.

Somewhere during beer number two, we both glanced over at the radar. Mick had been running a velocity loop, and the couplet we were looking at was off the charts, like nothing we’d ever seen before. We immediately went into chase mode, with Mickey grabbing all the gear while I ran to the counter to pay for the meal. I asked if the tab was below $20, and when the person said that it was, I just threw a twenty at them and ran out the door.

We raced south while listening to live reports coming over NOAA radio. It was obvious something terrible had happened in Greensburg, although neither of us at the time had any idea of the magnitude.

We got to Pratt, which is about thirty miles east of Greensburg, and turned west. We stopped near Haviland, where we began our actual “chase” of the Greensburg storm. I remember scores of emergency vehicles screaming by us for several minutes, all headed west from Pratt. The scanner was alive with constant chatter regarding the disaster that had just happened. We were using the velocity loop on radar as our main source of info, because the lightning wasn’t helping out as much as we needed. The first of three giant tornadoes we would observe that night loomed to our northwest, buried in darkness and probably precipitation. We were sure we were looking at a tornado, but it was so big and so hard to see, it was impossible to make it out clearly (it would be partially revealed in a capture from my video). The inflow was so incredible, I had to wedge myself against the open car door space while leaning against the door to keep it from closing on me. We moved back east and then north once the storm started moving further away.

Watching the radar, we were noticing alarmingly large spaces between mesocyclone occlusions. Not only were these couplets incredibly powerful, they were also unbelievably huge. It made sense that the “handoff” distance between mesos would be greater than normal as well, because the mesos themselves were so unusually large. Normally, five miles southeast of an ongoing meso/tornado is a reasonably safe distance, but not tonight. We kept a minimum of about seven to eight miles between us and the tornadoes for fear of being run over by the next cycle jumping toward us. Unfortunately, later that night, a local LEO would become an example of how these large-span meso jumps can be lethal.

As we continued north, we met a car coming south, frantically flashing its lights. At this point, with this storm and what it had already done, we weren’t taking any chances, so we turned around and headed back south. No sooner had we done so than Mick said, “There’s a huge wedge back there!” I stopped the car and we jumped out. I hadn’t yet seen it, but I could tell by Mick’s reaction that it was big. A few more seconds passed by, then a big flash of lightning lit up one of the largest tornadoes I’ve ever seen. “Whoah, I see it!” We held our ground and watched this huge wedge tornado through intermittent lightning flashes for a couple of minutes, then continued further north.

We stopped a few miles south of Byers, and a police car pulled up beside us. We didn’t know it at the time, but the driver was Officer Tim Buckman of the Macksville police department, a neighboring town to Byers about ten miles north and slightly west. We told him about the large tornado we’d been seeing off and on for the previous ten or so minutes, and he was already aware of it. He continued on ahead of us, and we followed him into town. Once we arrived in Byers, we saw Officer Buckman pulled over at the fire station, talking to a few firemen/spotters. As a courtesy, we stopped and asked him if he minded if we continued on ahead to chase the tornado. He said we could, but it was “at your own risk.” We told him we understood, thanked him, and drove north of town about a mile, where we stopped.

We continued to get glimpses of the tornado, and after a while, Officer Buckman drove past us. He went about a mile or so north, then turned west. The tornado was well off to our northwest, and the area he was driving into would’ve been a prime spot for the next tornado if the storm recycled. I remember thinking, as I videotaped his flashing red and blues moving slowly off toward the large tornado in the distance, “I wouldn’t go that way.”

As Tim Buckman’s emergency lights faded off into the darkness to our north-northwest, we became focused on a new area that was north of us, but closer than the previous tornado had been. Matching up what we were seeing to the radar, we were convinced this new area was the next probable tornado, southeast of the now dissipating tornado near Macksville, some ten miles to our north-northwest. We stayed put where we were, partly because we were almost out of gas at this point, but mostly because we were too spooked to get any closer. After a few more minutes, another large tornado became partially visible with lightning strikes. The eastern edge was buried in rain, but the west side of this monster loomed quite clear, a solid wall of black. We sat and watched this tornado, which was south of St. John, for maybe five minutes until we could no longer make it out. After that, we decided we’d call it a night, because we had another chase looming the next day, and we’d need some rest (though we hardly got any).

I don’t know why we even thought we could, but we drove back to Pratt, and managed to get a room at the first hotel we stopped at. I spent all night going over my video, finding bits and pieces of tornadoes within the lightning strikes. I wrote a report on Stormtrack while the local television news was showing us the first shots of the Greensburg monster we’d seen—incredible. The sirens never stopped all that night, with constant emergency vehicles driving to Greensburg and driving back from there with injured. It was a very dark and brooding night, probably the most unsettling night of my chase career. Since then, I’m much more wary about after-dark chasing. I was never very interested in nocturnal chasing, because night-time video is rarely worth the effort in my opinion. However, the significance of this event made the endeavor very worthwhile, and in the process, we managed to get video of tornadoes that nobody else did. What at first seemed like a curse actually became a blessing of sorts; we’d missed the marquee tornado of not only the event, but the entire year—but we’d managed to pick the storm up where almost everyone else had lost it, getting trapped by the devastation in Greensburg. The result was observation and video documentation of large tornadoes that no other human eyes ever found.

A few days later, unfortunately, we learned that a Macksville police officer had been killed by a tornado east of there. As it turned out, the officer killed was the one we’d spoken to that night during the Macksville tornado. He had made his way through rural areas just southeast of his hometown to get back to the highway east of Macksville so he could observe the large tornado threatening his community. Tragically, the last tornado we saw, from the same spot where we last saw officer Buckman driving northwest towards the Macksville tornado, formed south of his position, and struck him as he moved east on highway 50, critically injuring him. He would succumb to his injuries a few days later. We were likely the last ones to ever see him before this tragic event.

Q: Granted this may be a hard question to answer, but what has been your most outstanding chase, and what made it so?

S: I measure greatness in a chase by multiple factors: number of tornadoes seen, quality of tornado video, historical significance of the event, and overall aesthetic/sensory/spiritual experience. Even with that, I cannot choose just one day. So using the formula I described just now, I’ll try to narrow it down to just one event that fits each category.

Number of tornadoes seen: Even though it’s tied for second all-time for the most tornadoes I’ve seen in one day, I would have to give the nod for most tornadoes to May 29, 2004. Great video, but what stands out most about this day for me is the sheer number of visible tornadoes. Every size and shape imaginable, with the most incredible display of tornadic behavior I’ve ever witnessed: Multiple tornadoes merry-go-rounding about the parent mesocyclone. Tornadoes zigging, zagging, and doing full circles. Absolutely incredible!

Quality of tornado video: This category belongs to June 12, 2004. The infamous “glowing” Mulvane tornado steals the show from this event, but all the tornadoes that day were very photogenic, and I was able to capture incredible video of them all. This day is the bar for what I expect to bring home on video every time out. Mulvane was the first tornado I ever heard the roar from.

Historical significance: If we’d actually seen the Greensburg, Kansas, tornado that night, this would’ve likely been my number-one. However, May 3, 1999, remains at the top of this category. Many firsts happened for me that day: first F5 tornado, first 3+ tornado day, first double-digit tornado day (ten tornadoes), first up-close tornado encounter (less than a half-mile), and unfortunately, my first killer tornado.

I almost doubled my career total on this day. I had been chasing a little under three years at the time, and though I’d seen some tornadoes, I had never seen a day even close to this. Despite the dark cloud that hung over this event because of the of the human tragedy it brought, yet for me as a chaser, the sheer magnitude of what we’d seen and captured on video was almost overwhelming. That whole week was surreal: getting calls for interviews, having television crews at our apartment taping shows, the whole nine yards. The week after May 3, 1999, was as close as I would ever come to money and fame as a chaser. I appeared on television in both America and Germany (the German show actually aired first, so my TV debut was international LOL), and made $2,100 from video sales. There were no brokers in 1999. I had to fight those bloodthirsty wolves on my own, and in the end, despite the fact that I won the war, I decided the battle scars just weren’t worth $2,100. My television and video sales career began and ended that week.

Overall aesthetic/sensory/spiritual experience: Hands-down, this category goes to October 24, 2010. This was a day that brought back that old “chase first, forecast second” philosophy from my early years, but only because of my laziness. The only reason we even left the house that day is because Bridget Geaughan, my girlfriend/chase partner since 2008, was watching a storm explode just east of our apartment. We’d spent the previous two days busting on setups that, in my opinion, had looked better than this day. I wasn’t about to waste my Sunday on a third consecutive goose chase. However, Bridget pushed for us to chase and I caved.

Once we got out on the road after the initial storm she’d seen, it was obvious we’d never catch it. By now I was fully into chase mode, and I figured our only hope was to start heading southeast, cross the dryline, and hope like hell something new formed to our southwest. The plan worked to perfection, and we encountered the tornado of our lives in Rice, Texas. This chase has been well-documented in chasing circles, mostly because Bridget live streamed almost the entire lifecycle of the tornado. I’ll never forget looking up at the top of the funnel as it was in a near-steady-state, watching how the base seemed to get pulled into it like a bathtub drain. It was a view I’d not had before and haven’t seen since, but one I could get used to. Probably a once-in-a-decade type experience, maybe once in a lifetime.

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Thanks, Shane, for an informative, thoughtful, moving, and overall terrific interview! To those of you who’ve read this far: check out Shane’s blog, Passion Twist. It’s aptly named–filled with insightful, detailed, and well-written chase logs; packed with photos; and stamped with Shane’s unquenchable love for chasing storms.

Book Review: Severe Storm Forecasting by Tim Vasquez

Beginning with his Weather Forecasting Handbook, which I purchased years ago at a College of DuPage severe weather conference, I’ve collected one-by-one nearly all of Tim Vasquez’s books on storm chasing and weather. The only exception is Tim’s most recent, 2011 publication, the Weather Forecasting and Analysis Handbook, and that’s next on my list.

The owner of Weather Graphics and the well-known storm chasing forum, Stormtrack, Tim is a widely acknowledged guru of storm chasing and operational forecasting, particularly in the severe weather arena. The man possesses more convective knowledge in his left pinkie than most of us do in our entire bodies, and in this fairly recent publication, he organizes information that is most relevant to chasers and severe weather junkies.

In Tim’s words, “Severe Storm Forecasting was a project started in 2007 to serve as the perfect companion for intermediate forecasters and a refresher for experienced forecasters. It maps the current state of severe thunderstorm forecasting from an operational framework rather than a research or academic perspective. Equations, physics, and lengthy citations have been kept to a bare minimum.” (From the preface.)

In other words, the book is intended to provide up-to-date, practical information that storm chasers can readily apply in forecasting and in the field. Since its release in 2010, I’ve been wanting to get my hands on this book. A while ago, I finally shelled out my $29.95 and purchased a copy, and I’ve spent the last several weeks chewing on it. It’s nutritious fare: thoughtfully organized, as current as is possible in a field shaped by rapid technological advances, and accessible to anyone who wants to apply him- or herself to developing severe weather forecasting skills.

Severe Storm Forecasting is divided into 10 sections as follows:

  • The Forecast Process
  • The Thunderstorm
  • Mesoscale Convective Systems
  • Tornadoes
  • Hail
  • Lightning
  • Stability & Shear
  • Radar
  • Satellite
  • Diagnosis
  • .
    An appendix contains additional information on the WSR-88D radar and the more commonly used diagnostic tools in severe weather forecasting, and also supplies blank, reproducible hodograph and skew-T/log-P charts.

    While the topics covered will be familiar to chasers who do their own forecasting, I’ve found plenty to broaden my scope, ranging from brand-new insights to discussions on topics with which I was only vaguely acquainted. For example, the section on QLCS tornadoes is the first time I’ve seen the subject given more than a casual nod. Here in Michigan, linear systems are far more common than isolated supercells, so it’s nice to encounter a book that spends a little time looking at their role as occasional tornado breeders.

    A strong asset of Severe Storm Forecasting is the way it aggregates the broad array of elements that are relevant to severe weather and then expands on them in one tidy package. Don’t get me wrong: this isn’t one-stop shopping. One book simply can’t cover everything in depth; pick any chapter and you can make a further study of its subject. But this book does much more than skim the surface. It is by no means a mere primer; it is a text that will equip you with a broad and substantial grasp of severe weather forecasting, and you shouldn’t conceive of it as a one-time read that you move through linearly and then “finish.” There’s too much content for a reader to absorb all in one pass, and much of it needs to be connected with field experience in order for it to gel. So look at Severe Storm Forecasting as a reference that you will process bit by bit. Once you’ve accomplished your initial read, you will return to it again and again.

    In the style of his other books, Tim has made ample use of sidebars to provide interesting asides that range from the historical to the technical. Just riffling through the pages, I find, for example, a call-out on page 75 that consists of material written in 1888 by Gustavus Hinrichs that sheds light on the origin of the word “derecho”; then a few pages later, on page 80, I read a smaller sidebar that discusses the term “swirl ratio”; and still further along, on page 95, I come across a fairly extensive personal communication from Paul Markowski on the contributing factors in warm versus cold RFDs.

    Three recommendations for improvement:

    1. 1. I’m surprised that a glossary was not included in a work of this nature. It is the one area in which I consider this book to be lacking, and I hope Tim will address the matter in his next edition.
    2. 2. An online supplement would add value. This could feature graphic, possibly interactive, examples of such topics as lifting and modifying forecast soundings, radar interpretation, and so forth. The supplement would be accessible only to purchasers using a code included in the back of the book. It could be used with other of Tim’s books as well, so one supplement could serve multiple purposes.
    3. 3. I have the sense that the editing was grassroots. The result is quite good, but speaking as someone with a background in publishing, I think the book could benefit from further proofreading or perhaps a light edit.

    With these things said, Severe Storm Forecasting is an eminently useful and well-done resource that belongs in a storm chaser’s library. If you’re a new chaser, I would recommend that you start with Storm Chasing Handbook, also by Tim; then purchase this book to expand your knowledge. Those with a bit more experience can jump right in. Regardless of your level of expertise, get this book. At some point, you’re either going to be glad you own it or else wish that you did.

    Purchasing Information

    • Severe Storm Forecasting by Tim Vasquez, 262 pages.
    • $29.95 plus shipping, available from Weather Graphics.

    NOTE: This is a non-paid, unsolicited review. I’ve written it as a service to my readers because I personally appreciate Tim’s book and feel that it provides a valuable and well-organized resource for storm chasers and severe weather buffs.