Southern Wisconsin experienced the convergence of 3 cooling mechanisms during the afternoon hours of 16 May 2023: (1) the arrival of a dense band of smoke aloft — transported southward from wildfires in Alberta and Saskatchewan — which reduced incoming solar radiation, (2) a southward-moving cold front and (3) the inland surge... Read More
JMA Himawari-9 Infrared Window (10.4 µm) images of Cyclone Mocha in the Bay of Bengal on 13 May 2023 (above) displayed cold clouds surrounding an eye that gradually became more cloud-cleared — with isolated cloud-top infrared brightness temperature values of -90ºC and colder (yellow pixels embedded within dark purple regions).... Read More
1-minute Mesoscale Domain Sector GOES-16 (GOES-East) Visible/Infrared Sandwich RGB images (above) showed thunderstorms that produced a few clusters of large hail (up to 3.00 inches in diameter: SPC Storm Reports) in the St. Louis, Missouri area on 13 May 2023.There were also several reports of heavy rainfall — GOES-16 Visible/Infrared Sandwich RGB images at 1956 UTC UTC, 2100 UTC and 2124 UTC... Read More
1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.3 µm) images (above) showed thunderstorms that produced several tornadoes, hail up to 4.50 inches in diameter and wind gusts to 73 mph (SPC Storm Reports) in addition to heavy rainfall across parts of central and eastern Nebraska (NWS Omaha summary) on 12 May 2023.Pulsing thunderstorm overshooting tops exhibited infrared brightness... Read More
