As discussed on the CIMSS Satellite Blog on July 23rd, active tropical weather continues in the western Pacific Ocean. Specifically, the storm previously known as Invest 98W has organized into Tropical Storm Krosa, now located northwest of Guam and directly west of the Northern Mariana Islands, broadly moving north. Low-Earth Orbiting (LEO) satellite observations... Read More
1-minute Mesoscale Domain Sector GOES-18 (GOES-West) GeoColor RGB images with an overlay of Next Generation Fire System (NGFS) Fire Detection polygons (above) showed the rapid growth of the Cram Fire in central Oregon during the day on 14 July 2025. Strong westerly winds helped to transport a dense veil of smoke eastward. This wildfire had started... Read More
10-minute Full Disk scan GOES-19 (GOES-East) Infrared images combined with the Fire Mask derived product (above) showed a wildfire in western Ontario (north of Red Lake, CYRL) that produced a large pyrocumulonimbus (pyroCb) cloud beginning at 1930 UTC — when cloud-top infrared brightness temperatures first reached -40ºC, darker shades of blue... Read More
A cluster of wildfires was burning on both sides of the Northwest Territories / British Columbia border on 28 June 2025 — and 10-minute Full Disk scan GOES-18 (GOES-West) imagery (above) showed that the largest Northwest Territories wildfire produced a sizeable pyrocumulonimbus (pyroCb) cloud, beginning at 2230 UTC. As it drifted... Read More
