Another PyroCb in Idaho

On 27 August another pyroCb formed from the fire at 45.4 N 116.1 W. The previous day this fire produced a pyroCb. GOES-15 detected the smoke plume and pyroCb cloud, as well as the fire hot spot. Starting at 20:30 UTC on 27 August, the animation below shows visible (.63 μm) on the left and shortwave IR (3.9 μm) on the right (click image to play animation). In the shortwave IR images the red pixels indicate very hot IR brightness temperatures exhibited by the fire source region.

GOES-15 0.63 µm visible channel (left) and 3.9 µm shortwave IR channel images (right) (click to play animation)

GOES-15 0.63 µm visible channel (left) and 3.9 µm shortwave IR channel images (right) (click to play animation)

In addition, using GOES-15 10.7 μm IR channel the cloud-top IR brightness temperature could be found. The animation below, starting at 20:30 UTC on 27 August, shows the brightness temperature for the pyroCb is -55.5ºC around 00:30 UTC on 28 August (yellow color enhancement).

GOES-15 10.7 µm IR channel images (click to play animation)

GOES-15 10.7 µm IR channel images (click to play animation)

OMPS AI index images (courtesy of Colin Seftor) shows the transport of smoke. The max AI index was 10.1 at 47.88 N 106.12 W. This is value is just northwest of the source of the pyroCb. This image shows that the smoke is moving northeast which is consistent with the animations above.

OMPS Aerosol Index image on 27 August (click to enlarge)

OMPS Aerosol Index image on 27 August (click to enlarge)

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