Severe convection developed in the warm sector of a cyclone that was moving through the mid-Mississippi River Valley region, producing widespread reports of heavy rain, damaging winds, hail, and tornadoes on the evening of 03 April 2008 (SPC storm reports | NWS Little Rock AR report). An AWIPS image of the MODIS 11.0µm IR channel (above) shows the... Read More

Lee-side frontal gravity waves are occasionally seen to the east of the Rocky Mountains, moving southward across the High Plains of the central US (for example, see  03 April 2007,... Read More

AVHRR false color imagery (above; viewed using Google Earth) and GOES-11 visible channel imagery (below) revealed a family of cyclonic vorticies  propagating westward across the eastern North Pacific Ocean on 29 March... Read More

The winter of 2007/2008 has already produced record snowfall (100.7 inches at Madison, Wisconsin, and 76.2 inches at Dubuque, Iowa) or near-record snowfall (107.0 inches at Grand Rapids, Michigan, and 98.9 inches at Milwaukee, Wisconsin) over portions of the Upper Midwest region;  on 27 March 2008, another 2-6 inches of snow fell... Read More