Mostly cloud-free skies in the wake of a cold frontal passage (MODIS true color image) allowed some interesting temperature signatures to be observed across the Upper Midwest and western Great Lakes states on 09 July 2008. An AWIPS image of the MODIS Land Surface Temperature (LST) product (above) revealed significantly warmer LST values (90-95º F,... Read More

Fog that formed in the Gulf of Maine on Tuesday July 8th developed when relatively moist air moved from the continent over the cooler ocean waters and was cooled from beneath by conduction to the dewpoint. In other words, Advection Fog.An obvious question arises from the loop: Why does the... Read More

Jesse Ferrell highlighted an undular bore emerging off the coast of Africa this morning, as seen in the annotated 1200 UTC Meteosat-9 image above (or click here). Bores occur when impulses move underneath stable layers, exciting a series of closely-spaced lines of clouds, as shown here, for example. Bores are associated with... Read More

AWIPS images of the MODIS visible and 3.7 µm shortwave IR channels (above) showed smoke and a “hot spot” associated with a large wildfire that had burned over 30,000 acres in the Pocosin Lakes National Wildlife Refuge in northeastern North Carolina on 07 June 2008.The fire was started by lightning about... Read More