GOES-17 (GOES-West) Mid-level (6.9 µm) Water Vapor images (above) revealed a complex pattern of middle-tropospheric vortices moving slowly west-southwestward over Interior Alaska and the Chukchi / Bering Seas on 09 November 2021. Note that the cold (brighter white) peaks of a few of the higher mountain ranges — including Denali — could... Read More
A sequence of Suomi-NPP VIIRS Infrared Window (11.45 µm) and Visible (0.64 µm) images (above) showed snapshots of thunderstorms over parts of the Chukchi Sea and the Beaufort Sea off the northern coast of Alaska on 12 July 2021. The coldest convective cloud-top infrared brightness temperatures were in the -30... Read More
GOES-17 (GOES-West) “Red” Visible (0.64 um) images (above) showed the motion of ice within Norton Sound — inbound early in the day, transitioning to outbound later in the day — on 28 May 2021. This ice motion was likely driven primarily by tidal motions within the Sound; for example, a plot of tide height for Unalakeet... Read More
Suomi NPP VIIRS Infrared Window (11.45 µm) images (above) revealed a large area of cold surface infrared brightness temperatures across much of the North Slope of Alaska on 04 February 2021 — with the coldest IR temperature being -56ºC (darker shades of violet) about 30 miles south-southeast of Umiat (PAUM)... Read More
