Also known as "hole punch cloud", this cloud type is defined more by cloud absence. Most are circular, elliptical, or cigar-shaped, but this one appears like a dinosaur foot, loosely akin in shape to a bizarre supercell base I photographed in 2011. Fallstreak holes can have many origins, but usually happen when airplanes introduce ice crystals two ways within a field of cirrocumulus (or dense … [Read more...]
Moonlit Evening on Ruby Beach
After a foggy sunset, I stayed through twilight, then a bit into a full-moon night that was uncharacteristically clear and calm for a Pacific Northwest beach. Good thing too...for as the moon rose over the oceanside hills and shone in rays through forest gaps, it still wasn't too high to bear a somewhat reddened tone, reflected off gray logs, dark-gray/brown sea stacks, and a thin layer of marine … [Read more...]
Cloud, Mountain and Smoke Sandwich
Fire that had burned for many weeks, in the remote Olympic Peninsula wilderness, filled a cool and stable boundary layer with dense smoke that spread across much of the national park on this quiet Sunday morning. Meanwhile, from a promontory 5,000 feet above sea level, and about a thousand above the smoke, we could see the solution soon to arrive: rain from the Pacific, mostly just beyond this … [Read more...]
Shadowed Storm Towers over Montana Hills
A flanking line of towering cumulus and cumulus congestus rose over a tail-end zone of low-level convergence that was attached to a supercell unseen at left (east), mainly beyond a rampart of high hills. Shadowed by the anvil of other storms forming on the Bighorn Mountains (unseen at right/west), these turrets assumed a cool bluish hue, reflecting part of the sky's tone from above. I love this … [Read more...]
Crackling Arizona Sky
Following a wonderful sunset, the small, weak, diurnally heat-driven thunderstorm that framed these desert vistas had a few more flickers of in-cloud lightning to fling. This would be its last detectable electrical discharge; soon the storm would wither into remnant cloud wisps of twilight, as the evening cooled off the air and flipped off the convective switch. 13 WNW Tucson AZ (16 Jul 19) … [Read more...]
Downdrafts, Updrafts, Chaos!
This scene was every bit the chaotic, mysterious convective mess that it looks! About half an hour after staring downhill into the notch of a line-embedded supercell, the storm accelerated east-northeast. Here, its dense, rain-wrapped main mesocyclone lurked to the right, while small but intense updrafts developed over the rear-flank gust front across most of this view. A complicating factor: … [Read more...]
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