When Atmospheric Beauty Attacks

November 7, 2013 by · Comments Off on When Atmospheric Beauty Attacks
Filed under: Summary 

Arcadia NE
26 May 13

High Plains Therapy, Day 3 of 5

SHORT: Intercepted another spectacularly structured supercell, this time a mostly LP storm near Arcadia NEb. Missed some of the best photo opportunities due to close lightning strikes but still loved the show.

LONG:
On the day after a tremendous structure-fest in southwestern SD, we headed back toward the warm sector in central Nebraska in hopes of yet another. To summarize, the setup promised adequate low-level moisture, marginal to sufficient near-surface flow, favorable deep shear, and rather nebulous low-level foci for initiation. I was traveling in a caravan with the Dudes, Dudette and Dogs crew (David and Samara Fogel, Keith Brown, Ross Weitzberg, Porthos and Trego).

Following a long trek down from CDR, we consumed a meal and hung out in and near LBF, hoping for initiation that would occur close enough to the S or E side of the Sandhills to keep storm motions in more tenable observational country. The day was getting late, the sky disturbingly devoid of deep convection. That worrisome lack of focus kept us guessing and scanning the skies–good old fashioned “going visual” for clues to earliest initiation stages, whatever the data may show.

While sitting on a hilltop N of town, we finally saw that hope–a very young but rapidly deepening tower to the distant ENE. Given the obvious cap breach and favorable environment over there, we thought it would mushroom upscale, and as we cruisd back down through town and started cruising E on I-80, it did.

Even while still 50-60 miles out, as the magpie flies, the main cloud updraft’s high-based but striated character became readily apparent. Despite enjoying the visual treat of this storm’s development from a distance, including some classicaly splashing overshoots, I was wishing for the vehicle to sprout wings and a couple of Pratt and Whitney jet engines to get there sooner.

Roads dictated otherwise, however; we had to proceed in an Allen wrench-shaped path ESE to E on I-80 then N on US-183 to our long-awaited first rendezvous with the gorgeous storm near Ansley. As viewed from the S, the banded LP soda can spun its way off to our NE in the lowering sunshine, compelling us to get off to its E for a more contrast-friendly backlit perspective.

Performing that maneuver took us directly under the S rim of the updraft, which actually had a lowering base and some thin, faintly wrapping precip curtains with embedded hailstones of mostly subsevere size. Low-precip doesn’t mean no-precip! By the time we got E of the storm, between Westerville and Arcadia, we thought we were going to be in fat city, photographically, with the storm putting on an increasingly evident show of sweeping striations and bands. We had to get far enough E to get it all in wide-angle view, plus get out from under a CG bombardment that seemed to follow us away from the storm.

Unfortunately, opportunities to shoot safely were few and far between; so I didn’t get too many shots of the storm during any of 2 or 3 stops in this stage. The supercell’s anvil, augmented and thickened by that from more distant storms to the NW, would not stop flinging staccato, forked CGs all around us, many miles from the updraft, jagged arrows of Zeus fired disturbingly close and often across a wide area SE and E of the updraft. Usually in my experience, such blistering barrages are temporary, lasting just a few minutes until newer updraft cycles redistribute charge and favored areas shift. Not this time…the white-hot fusillade of electricity just kept coming and coming and coming…

Having gotten frustrated at being trapped in the car for many minutes, with some unwelcome visual obstructions to ideal shooting at the parking spot, I tried to time the last shot versus the bolt/recharge process. Often that works, but not this time. Having preset aperture and metering in the vehicle, I ran out to shoot this absolutely jaw-dropping structural exhibition right after the previous flash, then about-faced in less than 10 seconds. I barely started back when…CRACK-SLAM!!!!…a CG hit so close I couldn’t tell where. All I knew was that I was still alive, and a quick glance around at the other people revealed nobody lying on the ground. This warning shot sent all of us fools who were outside diving right back into vehicles for survival.

Warning heeded! Keith later told me he was across the highway and happened to see that CG hit in the plowed field just S of the road. Instead of frying one of us, it simply zapped some dirt. Enduring skull-rattling explosions of countless more close strikes, we had to wait until the storm moved several miles farther N before even thinking of sneaking outside again. I was tempted to drive several miles E (where some other observers did get amazing CG + updraft shots), but 1) was unsure about vantages in choppier terrain near Arcadia and 2) noted a gentle E and NE shift in the CG activity centroid.

So, we waited out that vicious attack a bit longer, then gingerly started to dare to shoot some more as strike frequency waned somewhat. A final cycle of CGs and a brief repositioning led to deepening twilight, and finally some confidence in shooting outside the vehicle with a tripod. The storm, now to our NNW and N, still seethed with nearly continual lightning, offering shot after shot after shot that contained some sort of lightning or another.

Here is a JavaScript time lapse of larger, full-width versions of those shots, and others in between, over a span of 9 minutes, for your viewing pleasure. Please set the speed bar almost all the way to the right for best effect. I wouldn’t know first-hand…but just as a guess, staring at that high-speed animation constantly after imbibing in intoxicating substances might yield some wild mental experiences.

We headed back to Grand Island for the night, enjoying a lightning-illuminated mammatus show in the rear-view, but too tired to bother stopping. I was satisfied–quite so, actually–both to be alive and to conclude a challenging but fulfilling third day of five in the rejuvenating regimen of High Plains Therapy!