McIDAS images of 1-km resolution GOES-15 (GOES-West) and GOES-13 (GOES-East) 0.63 µm visible channel data (above; click image to play animation) showed a pyrocumulonimbus (pyroCb) cloud from the West Fork fire complex rapidly penetrating the tops of surrounding orographically-induced cumulonimbus (Cb) clouds, beginning around 20:10 UTC or 2:10 PM local time on 28 June 2013. […]