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Archive: Wed Sep 2020

Northern California’s Bear Fire produces a pyrocumulonimbus cloud

1-minute Mesoscale Domain Sector GOES-17 (GOES-West) “Red” Visible (0.64 µm), Shortwave Infrared (3.9 µm), Fire Temperature Red-Green-Blue (RGB) + GLM Flash Extent Density (FED) and “Clean” Infrared Window (10.35 µm) images (above) showed the formation of a pyrocumulonimbus (pyroCb) cloud over the Bear Fire (part of the North Complex) in Northern California on 09 September 2020. The coldest cloud-top infrared brightness temperatures were -61.4ºC; no GLM-detected lightning activity was seen with this... Read More