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Category: VIIRS

Nearshore ice motion in the Beaufort Sea

Suomi-NPP VIIRS Visible (0.64 µm) images (above) showed a variety of Beaufort Sea ice floe motion within the nearshore waters of Alaska and Yukon during the 20-21 June 2022 period. Just north of Utqiavik (or Barrow, PABR), a sharp “shear line” was seen on 20 June — with a narrow... Read More

2 pyrocumulonimbus clouds produced by the Calf Canyon/Hermit’s Peak Fire in New Mexico

1-minute Mesoscale Domain Sector GOES-17 (GOES-West) “Red” Visible (0.64 µm), Shortwave Infrared (3.9 µm), “Clean” Infrared Window (10.35 µm) and Cloud Top Temperature derived product images (above) showed that the Calf Canyon Fire/Hermits Peak Fire in northeastern New Mexico produced a pair of pyrocumulonimbus (pyroCb) clouds on 14 June 2022. Extreme fire behavior was aided by surface wind gusts as high as 60 mph and very... Read More

Pyrocumulonimbus clouds in Alaska

A sequence of Suomi-NPP VIIRS Visible (0.64 µm), Shortwave Infrared (3.74 µm) and Infrared Window (11.45 µm) images at 2149 UTC and 2332 UTC (above) showed “before” and “after” views of a  pyrocumulonimbus (pyroCb) cloud that developed south of McGrath, Alaska late in the day on 11 June 2022. The... Read More