AWIPS images of the GOES-13 fog/stratus product (above) showed a plume of advection fog curling northwestward across southern Oklahoma on 02 January 2009. A relatively moist low-level air mass with dew points in the 40s F was flowing from northeastern Texas into southeastern Oklahoma (where radiational cooling was allowing surface air temperatures... Read More

Beginning in October 2008,  “high density winds” (also known as Atmospheric Motion Vectors, or AMVs) derived from the Japanese geostationary  Multi-functional Transport Satellite (MTSAT-1R, which is positioned over the Equator at 140º East longitude) were added to the NOAAPORT Satellite Broadcast Network (SBN). National Weather Service... Read More

Very cold air was becoming established across the interior of Alaska during the last few days of December 2008. AWIPS images of the 4-km resolution GOES-11 10.7 µm IR channel (above) showed large areas exhibiting very cold IR brightness temperatures (colder than -40º C, darker blue color enhancement) which were... Read More

A potent shortwave trough was propagating eastward across the Upper Midwest region on 29 December 2008, and AWIPS images of the GOES-13 6.5 µm “water vapor channel” (above) showed a well-defined signature of mid-level dry air (yellow colors) moving rapidly east-southeastward over... Read More