The strong arctic outbreak of early February 2007 brought an unusually cold and dry air mass over the northcentral and northeastern US. Water vapor channel imagery from the GOES imager and sounder on 05... Read More

As a follow-up to the previous blog post, cold air and lake-effect snow continued across the Great Lakes region on 05 February 2007. GOES-12 visible imagery (above; Java animation) revealed a narrow filament of Read More

The coldest air of the 2006-2007 winter season (surface temperatures on 04 February 2007 were as cold as -42º F / -41º C at Embarrass, Minnesota, -31º F / -35º C at Tomahawk, Wisconsin, and -21º F / -29º C at Randville,... Read More

AWIPS images of radar reflectivity and GOES-12 visible and InfraRed (IR) imagery (above) showed a well-defined mesoscale convective eddy that was moving southward across Lake Michigan during the day on 30 January 2007. For a few hours, the core of this mesoscale... Read More