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Archive: Aug 2013

Rim Fire in California

A night-time (10:01 UTC or 3:01 AM local time) comparison of AWIPS images of Suomi NPP VIIRS 3.74 µm shortwave IR and 0.7 µm Day/Night Band data (above) showed signatures of the Rim Fire which had been burning since 17 August near Yosemite National Park in California. On the shortwave... Read More

First snowfall of the season in northeastern Alaska

AWIPS images of Suomi NPP VIIRS 11.45 µm IR channel data (above; click image to play animation) showed the development of a cyclonic swirl of middle to high altitude clouds associated with an upper-level shortwave moving northward over northeastern Alaska on 20 August 2013. This disturbance helped to reinforce the... Read More

Mesoscale Convective Vortex over Nevada

 AWIPS images of 4-km resolution GOES-13 10.7 µm IR channel data (above; click image to play animation) showed areas of nocturnal thunderstorms over southeastern California, western Arizona, and southern Nevada on 19 August 2013. These storms were initially producing numerous cloud-to-ground lightning strikes... Read More