Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 402 PM EDT Tue May 07 2013 Valid 00Z Wed May 08 2013 - 00Z Fri May 10 2013 ...Wet and soggy conditions will continue to accompany a cut-off low creeping up the Eastern Seaboard... ...Widespread shower activity is expected across the Southwestern states in response to another closed low... ...Severe storms possible over the Central and Southern Plains... Wet and soggy conditions will continue to accompany a cut-off low creeping up the Eastern Seaboard the next few days. A plume of Atlantic moisture getting wrapped inland ahead of an occluded cold front will fuel moderate to heavy rains along and ahead of the boundary while it lifts northward through the Mid-Atlantic states on Wednesday and into the Northeast Thursday. Behind the occluded front, some periods of sun will be possible during the day tomorrow with drier air working in aloft, leading to more unstable conditions. This could allow for some scattered thunderstorms to develop tomorrow afternoon across portions of the Mid-Atlantic. The closed low aloft will weaken with time and precipitation should decrease in intensity. Unsettled weather is expected across the Western U.S. as a second cut-off low slowly makes its way inland toward the Four Corners region. Widespread showers and thunderstorms are expected over California...the Great Basin...and Central Rockies into Thursday. Limited moisture across the region will keep precipitation totals light...but accumulating snows will be possible over the higher peaks of the Sierra Nevada range and Colorado Rockies. An increase in convection is expected across the Southern and Central Plains the next few days as the closed low in the Western U.S. edges eastward and low level southerly flow draws Gulf moisture northward. Ample amounts of instability will make severe weather a possibility with any developing storms. Please refer to the Storm Prediction Center for the latest information on the threat for severe storms. To the north of the convection...a strong cold front dipping down from Canada will drop temperatures as it sinks through the Dakotas and Upper Mississippi valley on Wednesday. Krekeler/Gerhardt Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php