10-minute Full Disk scan GOES-18 (GOES-West) “Clean” Infrared Window (10.3 µm) + Total Precipitable Water (TPW) images (above) showed the colder clouds associated with rain showers (with isolated embedded thunderstorms) and the clear-sky TPW field in the vicinity of Hawai`i during the 08-09 January 2024 time period. Surface analyses depicted a cold frontal boundary — which became more... Read More

Overlapping 1-minute Mesoscale Domain Sectors from GOES-16 (GOES-East) provided imagery at 30-second intervals during an outbreak of severe thunderstorms (SPC Storm Reports) across parts of the Mid-South and Deep South on 09 December 2023. “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.3 µm) images (above) included time-matched plots of SPC Storm Reports for a  thunderstorm that produced a... Read More

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Clean” Infrared Window (10.3 µm) + Total Precipitable Water (TPW) images (above) showed severe thunderstorms that developed along a cold front that moved north-northeast across Argentina and Uruguay on 01-02 December 2023. Pulses of thunderstorm overshooting tops occasionally exhibited infrared brightness temperatures in the -85 to -90ºC range (brighter white... Read More

Storm Reports for the first two weeks of November 2023 show that the all but one of the reports have occurred over lower Michigan, where large hail (1 to 1.5 inches in diameter) occurred shortly after sunrise on 6 November in Newaygo County (1423 UTC), Montcalm County (1440, 1443 UTC) and... Read More