Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 500 AM EDT Mon May 06 2013 Valid 12Z Mon May 06 2013 - 12Z Wed May 08 2013 ...A sluggish cut-off system lifting out of the Deep South will be the main focus for moderate to heavy rainfall across the Mid-Atlantic states... ...A deep cyclone drifting off the California Coast will bring widespread unsettled weather across the Western U.S.... A sluggish cut-off system lifting northeastward out of the Deep South early this week will be the main focus for precipitation across the Eastern U.S.. Deep Atlantic moisture getting pulled in ahead of a wrapped up cold front slowly moving up the Eastern Seaboard will fuel moderate to heavy rains...with embedded thunderstorms...across portions of the Tennessee Valley and Mid-Atlantic States. Although the closed low aloft will begin to fill in and the surface front should become a bit more progressive...heavy rains and possible flash flooding will be possible over the eastern slopes of the Southern/Central Appalachians. Upstream...a second cut-off low drifting southward off the California Coast will bring unsettled weather across much of the Western U.S.. Initially precipitation will be fairly isolated...but as the closed low begins to move inland towards the four corner states and moisture increases across the Southwest...Great Basin...and Southern to Central Rockies...shower and thunderstorm activity will become more widespread. The highest precipitation totals will be along the favored slopes of the terrain...and any snow accumulations will be confined to the highest elevations. Gerhardt Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php