Crashing over rugged basalt cliffs, the booming churn of the Pigeon River obscures that imaginary line somewhere inside, marking the Ontario/Minnesota (Canada/U.S.) border. Seen here from the better vantage on the Canadian side, the rugged basalt cliffs and blocks rip the water into a tempestuous froth of drops, spray and wildly gyrating splashes. This paints a refreshing mental image on a hot … [Read more...]
Wall Cloud, Not Tornado!
Glancing at this still image looking northwest, with no sense of motion, one may surmise this as a ragged-looking tornado; after all, it's in about the right place: the inflow notch of a supercell, the main updraft and likely low/middle-level mesocyclone area, immediately upshear from the forward-flank tail cloud at right. In fact, it was a very slowly rotating wall cloud, mostly rising in … [Read more...]
Tucson Funnel
Surprise! While fueling up at a south Tucson gas station, I happened to glance at a nearby, ragged, high thunderstorm base through a slot between the awning and store building. Lo and behold: a nub funnel cloud appeared—rotating as a true funnel must, albeit slowly. The cyclonic, non-supercell funnel gradually lengthened into a cone and persisted for a few minutes. That was just long enough … [Read more...]
Arizona Mountain Downburst
Over the elevated plateau south of Flagstaff, numerous thunderstorms formed mostly separate from each other, but within about an hour's span. This was one, dropping a well-defined downburst into the low mountains east of Prescott. Within another hour, their growth and collective outflow had covered most of central and north-central Arizona's high country with cool, wet air, and surface … [Read more...]
Downburst and Classic Cars
A more classical microburst is hard to find, with toroidal curling of rain feet. A more classic pair of cars is hard to find too, with these old Mercurys long past their shelf life and facing the eastern Arizona sky. I was hoping for cloud-to-ground lightning with this storm, given such an unusual foreground, but got none. Fortunately, a later one in the chain of cells obliged! Benson AZ (12 … [Read more...]
Supercell Seedling
Already sprouting a small tail cloud and growing a robust updraft base, this very young and increasingly electrified storm emerged from a large mass of mostly midlevel, midafternoon convection dropping virga and light rain, as I've seen several times with late-developing Colorado supercells. Lightning activity grew markedly in this stage—not surprising considering this newfound updraft thrust … [Read more...]
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