5-minute CONUS Sector GOES-19 (GOES-East) Nighttime Microphysics RGB + daytime True Color RGB images from the CSPP GeoSphere site (above) showed the formation of nocturnal river valley fog over parts of the Mississippi River and a few of its tributaries in Wisconsin, Minnesota, Iowa and Illinois on 03 August 2026. The river valley fog then... Read More

While the Pacific has kept seeing its share of intense tropical systems, the Atlantic has been quieter. This is consistent with what we expect with a strong El Niño, as the global scale impacts from that phenomenon tend to include increased wind shear in the Caribbean and western Atlantic which... Read More

1-minute Mesoscale Domain Sector GOES-19 (GOES-East) Infrared Window images (above) showed a large and persistent cluster of deep convection that remained southwest of Tropical Storm Bertha’s center during the nighttime hours leading up to sunrise on 23 July 2026.Pulses of overshooting tops exhibited very cold infrared brightness temperatures of -90 C or... Read More

The dominant weather story across much of the central United States remains the continuing impact of the Minnesota and Ontario wildfires on the air quality in the upper Midwest. You can see just how impactful the smoke was by looking at this slider of two images from the Blog’s home... Read More