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Archive: Fri Apr 2021

Early Spring over the Great Lakes

VIIRS data from the ascending NOAA-20 overpass on 2 April 2021 — with data downloaded at the Direct Broadcast site at UW-Madison — showed predominantly clear skies over the Great Lakes.  Lake ice is confined to bays on the north shore of Lake Superior, and a hint of green appears... Read More

Thunderstorms northeast of Guam

The animation above shows Himawari full-disk imagery from 2300 UTC on 1 April through 1140 UTC on 2 April and depicts a cluster of thunderstorms over the Pacific Ocean far to the northeast of Guam.  A particular challenge in diagnosing atmospheric events over the open Pacific is the lack of... Read More