A shallow bank of fog and stratus cloud was moving southward along the Delaware/Maryland/Virginia coast during the pre-dawn and early morning hours on 03 April 2007. GOES-12 3.9µm InfraRed (IR) imagery (above; Read More

The effect of the topography in western South Dakota and eastern Wyoming was very obvious on 19 March 2007, as low-altitude stratus clouds were forced to move around the higher elevation portions of the Black Hills (GOES-11 visible images:... Read More

Thick fog forming in southern portions of Osceola county in Florida was a factor in causing a multiple vehicle accident along the Florida Turnpike during the morning of 13 March 2007. AWIPS images of the MODIS and GOES fog/stratus brightness temperature difference several hours before the accident (above) shows how the 1-km... Read More

It’s straightforward to differentiate between high clouds and the ground in infrared satellite imagery because of large temperature differences. As clouds get closer and closer to the surface, their temperature gets closer and closer to the surface temperature, and brightness temperature differences can become insignifcant. At night, when visible data... Read More