Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 308 PM EDT Sat May 31 2014 Valid 00Z Sun Jun 01 2014 - 00Z Tue Jun 03 2014 ...Flash flooding and severe weather possible for portions of the north and central U.S. this weekend... ...Light rain and scattered storms remains as upper low continues to weaken over the Southeast... A frontal boundary stretched across the Upper Midwest and into the Rockies today will continue to drift very slowly southward towards the Central Plains over the remainder of the weekend and into early next week. Showers and thunderstorms will be possible for much of the north-central portion of the country from the Upper Midwest to the Northern Rockies. The most organized of the convection is expected to be just along and ahead of the front from central Nebraska to northwest Wisconsin where heavy rain and a nearly stalled boundary could increase the threat for flash flooding on Sunday. Behind the front in eastern Montana and North Dakota, a second area of concern for flash flooding looks possible as organized convection fires up underneath the upper level trough within a still unstable and moisture rich air mass. Along with heavy rain and flash flooding, the threat for severe weather exists tonight across the northern and central High Plains, and tomorrow across the Central Plains. The now very weak and stubborn upper level low stalled out over the Southeastern U.S. should continue to bring scattered showers and thunderstorms to the area on Sunday, but the threat for widespread flash flooding has greatly diminished. By Monday, high pressure settles in, and any activity should remain confined to the Gulf Coast. Farther north, high pressure dominating the Northeast and Mid-Atlantic is expected to keep conditions dry and very pleasant, as temperatures max out at near normal or even at slightly below normal values for this time of the year. Monarski Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php