The Nighttime Microphysics RGB, above, over central Wisconsin (that’s Green Bay at the northeastern edge, and southeast Minnesota/northeast Iowa over the southwestern part, of the animation), shows a field of low clouds stretching west-southwest to east-northeast. Note however, the occasional appearance of redder pixels within the field (as shown in... Read More

Here’s a text received late on 8 May from a kid: “Hail today in Portland”. The animation above shows GOES-17 Visible (0.64 µm) imagery between 2201 UTC on 8 May and 0311 UTC on 9 May. The follow-up text answering the obvious question (What time?) was “Around 5 PM” —... Read More

First thunderstorms of the year around here. @DaveSnider @capture907 @AlaskaWx pic.twitter.com/xeMhNiLSiU— Brian Brettschneider (@Climatologist49) May 5, 2022 1-minute Mesoscale Domain Sector GOES-17 (GOES-West) “Red” Visible (0.64 µm) images (above) showed these isolated thunderstorms as they moved north-northwestward up the Susitna Valley (northwest of Anchorage).In the corresponding 1-minute GOES-17 “Clean” Infrared Window... Read More

A dryline over the United States High Plains will serve as a focus for convective development later in the day on 22 April. (Click here for the 1300 UTC Convective Outlook). What tools are available to view gradients of Total Precipitable Water, and how do they compare? The toggle above... Read More