A "sterling" example of "altocumulus lenticularis" (lens cloud) sped over the part of Colorado most removed from mountains, at the same time thunderstorms were forming just 30–60 miles to the southwest. Aviators avoid such clouds, as they reveal the presence of rough waves aloft that can severely jostle and perhaps damage aircraft, and cause injury within. The old Surface Aviation Observation … [Read more...]
Sterling Tornadic Circulation
Our second vantage of the Sterling City tornado mostly was obscured by wrapping rain and hail, though we intermittently could hear its whooshing noise "somewhere in there". Fortunately, the dense precip curtains thinned just long enough to reveal a fat, truncated condensation funnel with multiple vortices whirling beneath, and surrounded aloft by a very rapidly rotating wall cloud. This … [Read more...]
Wet Sunset
On the other side of the sky—and the National Weather Center—from the "Sky Feast" of a lightning-ticked rainbow, a marvelous rainy sunset unfolded. This one shone just briefly, yet sublimely, in coppery hues reflected off puddles beneath, and amidst fleeting dances of crepuscular rays. Norman OK (27 May 21) Looking WNW 35.1818, -97.4406 … [Read more...]
Shelf Thrust West
Outflow from a storm complex to the east surged westward into the midafternoon light cast an unusual light across the southwest Texas landscape for this time of day, and textured the sky with the turbulence of the arcus cloud's "whale's mouth" underbelly. 8 SSW Eldorado TX (19 May 21) Looking W 30.7195, -100.6358 … [Read more...]
Unwelcomed Greeting
Imagine being a guest at a hotel, finally sleeping soundly after the noisy storm that rolled past during the previous night, then going outside in the morning to find this scene where your car's back window had been. Wind-driven, two-inch hailstones commonly broke back and side automotive windows in this area of town, at a much higher rate than front windshields, which are composed of stronger … [Read more...]
Third Warm-Frontal Tornado
[Part 3 of 3] Though not the last one (this supercell would spawn two or three more tornadoes after a substantial time gap and major evolution in the storm), this was the final, closest and shortest-lived tornado of a closely associated, three-vortex episode that occurred when the storm initially interacted with a warm-frontal zone. It developed in a separate area of the elongated updraft base … [Read more...]
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