The long nights of November allow ample cooling in clear airmasses, and fog is a frequent occurrence over rivers that are still relatively warm compared to the surrounding land. In these near-water locations, cooling to the dewpoint, and resultant saturation, allows fog to form in and along River valleys as... Read More

A comparison of the 1-km resolution MODIS fog/stratus product with the corresponding 4-km resolution GOES-12 fog/stratus product (above) shows the importance of improved spatial resolution for the detection of areas of river valley fog (yellow to orange features) that were beginning to form across parts of southwestern Wisconsin and adjacent... Read More

The 2009 wildfire season roared to life in Alaska on 02 July – 03 July 2009, with a number of very large and very intense fires breaking out across interior portions of the state. A ridge of high pressure was in place over the region, allowing Fairbanks to experience a high temperature above... Read More

AWIPS images of the 1-km resolution MODIS fog/stratus product and the 4-km resolution GOES-12 fog/stratus product (above) demonstrate the advantage of higher spatial resolution for the detection of widespread small-scale fingers of valley fog that had formed during the overnight hours over much of the southern Appalachian Mountains states on... Read More