Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 345 PM EDT Fri May 31 2013 Valid 00Z Sat Jun 01 2013 - 00Z Mon Jun 03 2013 ***Storm will wind down over the Northern Plains followed by clearing skies*** ***Cold front will slowly move eastward with heavy showers and thunderstorms especially from the Southern Plains to the Lower Mississippi Valley*** ***Warm and humid conditions will cover much of the East but will begin to end as front moves eastward*** An intense low pressure system over North Dakota will slowly weaken as it moves eastward with a widespread cold rain shrinking in size and gradually ending over the Northern Plains by Saturday. Cool air from Canada will follow its wake. A slow moving cold front will move eastward across the Mississippi Valley and Midwest on Saturday and reach the Ohio and Tennessee Valleys on Saturday with a widespread area of showers and thunderstorms ahead of the front. Some of the rainfall is expected to be quite heavy and a threat of severe weather will continue, so continue to monitor reports from the Storm Prediction Center. By Sunday evening, the front will be approaching the East Coast with widespread thunderstorms from the Southeast across the Appalachians to the Northeast. Cooler more tranquil weather will follow behind the front across the Plains, Midwest and Lower Mississippi Valley by later Sunday. Ahead of the front, warm, humid conditions will continue for much of the weekend along the East Coast with temperatures remaining in the 80s and lower 90s and dewpoints in the 60s to near 70 degrees. Sunday will represent the last day of the early season heat before cooler conditions are likely to return in early June. Across much of southern Florida...a persistent east to southeasterly flow of tropical moisture will bring numerous showers and thunderstorms during the entire period with locally heavy rains likely Another upper low will expand across the Pacific Northwest on Sunday, leading to cooler and some possible showers during the day. Kocin Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php