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                   Wednesday, May 31, 2023

May 2023 storm photography roundup

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Here's a summary of events covered during the peak of severe weather season in what turned out to be an uncharacteristically inactive May.

May 2023 Event List

May 1: Illinois blowing dust

After hearing the reports of the ongoing dust storm and resulting pileup only 50 miles north of here, I went out for about an hour to Highland and back to see if similar conditions were in progress around the metro area. Despite the newly-plowed fields and sustained strong winds, thankfully I didn't see anything other than a slight haze of dust kicking up from the fields in the area.

May 6: Troy, Missouri bust

I had prior obligations this day, and couldn't leave until 4pm. This was inconsequential for me, as the setup was not one that I will normally drive far to see. The primary target was too far away (a 6 hour drive) in northwestern Missouri, and furthermore there was some supercell tornado potential existing here in the St. Louis metro. So, the plan was to intercept the expected northern Missouri supercells late as they approached Highway 61, somewhere around Hannibal or Bowling Green. I was also watching for storms to form farther south along I-70 that would clip the northwestern St. Louis metro area at about the same time. If a storm could get going in that area, it would have a great supercell environment to take advantage of. I headed up to Troy, MO to position and wait for either scenario. After some time, the lack of robust cumulus made it apparent that the southern storms were not happening. Not only that, the northern Missouri supercell was still several hours away, and models hinted that it would likely weaken well before then (not to mention being well after dark). I decided I didn't want to drive the extra distance and have such a late arrival time home for what would likely be a struggling nighttime storm by the time I could see it. So, at 7PM, I gave up on the day and headed home.

May 7: St. Louis metro hail and lightning

This wasn't a great setup, but deep-layer shear meant there would be a chance for a few supercells. The problem was that the first storms fired just after noon, way too early. I was only home for a few minutes after church before I had to run right back out to intercept a storm developing right over town. I stayed with this storm along I-64 to Woodlawn, noting nickel-sized hail and panicking drivers stopping on the interstate at Okawville. The storm had some decent lightning, but was frustratingly uncooperative with producing bolts while I had the high-speed camera on it. I expected (hopefully) better storms over St. Louis later, so I left these storms go at Woodlawn as they congealed into a line.

Back home, an outflow boundary from the storms was stalling and looked like it could provide some tornado potential if a new storm could go up on top of it. A tornado-warned storm up near Springfield seemed to validate this potential, and the environment here was similar. But alas, new surges of westerly outflow from the storms to the east kept pushing the boundary west away from developing cumulus congestus.

The boundary stalled again for about an hour over downtown St. Louis with vigorous cumulus above it, so I camped out downtown in case a storm went up. This almost happened as a healthy base consolidated just southwest of downtown, but quickly fell apart. Meanwhile new storms to the east were producing one-inch hail in O'Fallon, but I held my ground downtown. Another big surge of westerly outflow arrived and started moving the boundary west again, and this time the cumulus above it was fizzling. I called it a day before sunset and headed home, keeping a close watch for renewed activity on the boundary when the low-level jet ramped up after dark. The LLJ activity never happened.

Just before midnight, I went out to try to shoot sprites over a second MCS to the north as it slowly approached, but clouds blocked that view. These storms sent a fresh strong outflow moving southward, with new storms going up along it. Eventually this activity moved overhead, so I went out for about 2 hours to investigate. There were a few bursts of lightning, but again it was all uncooperative for my cameras. Here are two illustrative examples: the only in-frame bolt happened as I gave up and started taking down the tripod, the other was mostly out-of-frame:

Models backed off of the expected stratiform precip area behind a third complex of storms moving in from the northwest, and radar trends seemeed to concur. So, I didn't stay awake for the storms' arrival in the metro at dawn.

May 8: Storms from Mascoutah to Venedy, IL

Another slight risk setup with good instabilty and decent upper flow. This time, the best parameters were in the jungles of the Missouri Ozarks southwest of St. Louis, though some potential existed in the St. Louis metro that would preclude traveling out of the area. The Ozark storms developed as expected, but several attempts at storm initiation east of the city close to home before sunset were unsuccessful. The anvil blowoff from the Ozark storms overspread southern Illinois, killing our destabilization.

After dark, I could see the lightning from the ongoing Ozarks storms about 50 miles south of home, and could even hear the thunder at that distance. I tried shooting the lightning from just south of town, but all of the infrequent visible bolts were uncooperative. Finally, after 9PM the northern segment the complex managed to build northward to within 10 miles of home. I went down to south of Mascoutah as this shelf cloud advanced northward, though the lightning here was limited to only flashes and no visible channels.

I drove east to Venedy to shoot the back side of the dying storms. A couple of visible bolts finally cooperated, breaking the 3-day streak of lightning eluding in-frame captures. These were about 20 miles to the south of me, shot on the 50mm lens. The lightning was too distant to attempt shooting with the high speed camera.

May 10: Lightning at St. Robert, MO (Plains trip false start)

I wasn't very impressed by the midweek system in the Great Plains. Although it provided a series of supercell opportunties from May 9 through the 11th, it wasn't quite up to my normal standards for a trip. I had already decided not to travel to the events in northeastern Colorado/northwestern Kansas on the 9th and 10th, but was eyeing the setup in Oklahoma on the 11th for the first Great Plains expedition of 2023. The main impetus for making a trip was the prospect for the Plains to shut down for an extended period afterward - possibly through peak season, making it seem like a "it's-now-or-never" question. I was still undecided by mid-afternoon, but nonetheless I packed up all of my gear and headed out to get a needed oil change, intending to make the go/no-go decision sometime later.

After my oil change was done, a cluster of strong thunderstorms in central Missouri prompted me to go ahead and begin the drive southwest on I-44. At least I'd have some lightning to shoot on the way. I arrived on these storms at St. Robert. Although they had weakened considerably, a persistent electrified stratiform precip region continued to produce horizontally-extensive lightning flashes every few minutes. I found a tower near the interstate that was at borderline height for upward lightning initiation, and stopped for about an hour to shoot this with the high speed camera. No upward flashes occurred, but I captured this negative cloud-to-ground flash that was at a distance to discern the upward propagation of the return stroke current pulse at 6,002fps.

After the lightning activity ceased, I continued my trip southwest toward Oklahoma. It was 11pm when I stopped at Mount Vernon (west of Springfield) for gas and to review the latest data. At this point I noticed even more negatives for the Oklahoma setup. The best upper support would be arriving too late and would be too far west, meaning any supercells would likely be heavily HP (high-precipitation) despite the good low-level shear. That meant even though there would be a decent shot at significant tornadoes, they'd likely be too rain-wrapped to see easily. And the upper wave itself would be weakening. Of more concern was the increasing morning/midday convection and clouds showing up over the target area, meaning that now the instability itself (one of the bigger pluses of the setup) was in question.

I really didn't like what I was seeing in Oklahoma, so I switched my focus to the two Kansas targets that were available: the arc of dryline storms extending back toward Dodge City that would be underneath of the better upper support, and the cold core low region up near Colby. Though I felt the cold core option looked worthy, neither appeared appealing enough to make the long drive necessary to reach either of them. So, I did something I'd never done after this long of a drive to the Plains: I got on I-44 east and headed back home, arriving at 3AM. I'd turned around once before after driving 90 minutes west when new data discouraged me on a Plains setup, but 4 hours was a new personal record for length of a "false start" or "check swing" Plains trip drive.

It turns out it was a big mistake to back out of the Plains trip. Every target produced tornadoes, some very photogenic and memorable. Unfortunately that's the way it goes sometimes.

May 13: Lightning from St. Peters, MO to Lively Grove, IL

My low expectations for this day sunk even lower when the expected storms northwest of St. Louis fired well before noon, long before peak destabilization could take place. Nonetheless, the storms had several intense intervals, all of which occurred when I was either driving to them or had already left them. I arrived on the first storm of the day in St. Peters, which promptly went from visible-lightning-barrage to no-visible-lighting after I'd parked and started recording it. I stayed just ahead of this storm to Pontoon Beach, but it never provided me with another interval of visible lightning.

I left this storm and headed to downtown St. Louis for new development on the southern flank of the previous storm. I arrived just as this storm sent a strong outflow through the city, kicking up dust.

All of the storms were behind the gust front and therefore had little tornado potential. I stayed downtown shooting lightning for another 30 minutes, then eventually decided to position to south of Belleville to get ahead of a newer area of storms just ahead of the gust front. This nearly completely fizzled just as I exited the precip and got ahead of it south of Mascoutah. I headed back south to St. Libory for a newly-active cell producing a steady but slow volley of bolts every couple of minutes. This was predictable enough to capture a couple of 6,000fps high speed shots, though the best bolts happened while I was moving to stay ahead of the heavy rain. I gave up on the storm when it stopped producing cloud-to-ground bolts at Lively Grove.

May 14: Storms from Troy, IL to St. Louis: lightning and overhead funnel

Yet another low-expectations day that actually surprised me with a few interesting phenomena. I started on the first storm to fire in the St. Louis region in Troy, Illinois, staying with it to New Baden as new storms formed around it and slowly moved south-southeast. There was no visible lightning, no low-level organization and not much of any visual interest aside from a short-lived downburst at Lebanon with a weakly-defined precip foot curl.

Disappointed with this storm's non-lightning production, I dropped southeast to Mascoutah for what data indicated was the lone regular lightning producer in the cluster. While the storm stopped producing bolts as I arrived on it, I got out of the car to look at the base to see a well-defined funnel spinning directly overhead. Strong northerly outflow underneath of it meant that this circulation had almost no chance of reaching the surface, but kept my head on a swivel on the ground around me while shooting just in case.

This feature lasted nearly 5 minutes, long after I was forced to get back into the car by the arrival of the rain. I stayed ahead of the storm to St. Libory, but it never recovered its previousl levels of organization. I headed back into St. Louis as a stronger line of lightning-active storms was arriving from the west. I set up for a short time downtown, shooting both stills and high-speed video. After the core of the storms arrived downtown, the presence of a trailing stratiform region behind them prompted going to the usual Brentwood spot for upward lightning from the TV towers. Two upward flashes occured, both fast positive leaders from all three Shrewsbury towers (this video is included in the above-linked clip).

May 23: Convection at Lebanon, IL

Upper-level flow and decent instability have been absent across the Midwest in the last half of May, with Tuesday the first time the St. Louis region has seen even convection in 9 days. The parameters didn't warrant going out for more than an hour 10 miles from home as some towering cumulus bubbled up north of I-64 near Lebanon, IL, eventually growing into a 25-minute heavy rain shower with no lightning or hail to be seen.

Not even a rainbow appeared as the direct sunlight shone on the precip toward the end of the cell's life cycle, then after dark, I missed a brief lightning-active storm that fired just to our southwest after I'd returned to work. It was symbolic of a Midwestern peak season that has so far been eluded by impressive and/or cooperative storm phenomena.

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