On 18 June a pyroCb formed in Alaska. GOES-15 detected the smoke plume and pyroCb cloud, as well as the fire hot spot. The pyroCu (64.5 N 153.2W) occurred at around 1:30 UTC . Starting at 01:00 UTC on 18 June, the animation below shows visible (.63 μm) on the left and shortwave IR (3.9 μm) on the […]