Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 312 AM EDT Thu Jun 02 2016 Valid 12Z Thu Jun 02 2016 - 12Z Sat Jun 04 2016 ...Flash flooding possible across portions of the southern plains and western Gulf Coast... ...Locally heavy rain possible across the North Carolina Outer Banks... ...Warm and dry conditions expected across much of the western U.S... A slow-moving frontal boundary will continue to move across the southern plains and lower Mississippi valley today, with scattered to numerous showers and thunderstorms expected today and tonight. Heavy rainfall amounts of 1 to 3 inches are possible across portions of the southern plains and western Gulf Coast, and flash flooding is possible. On Friday the front will become stationary across Texas, keeping numerous showers and thunderstorms in place from the eastern half of Texas to eastward to the lower Mississippi valley through Saturday morning. Farther north, a low pressure system will move from the northern Rockies into the northern plains today. The system will be relatively starved for moisture initially, thus only scattered showers and thunderstorms are expected. By tonight, however, the system will begin to draw in deeper moisture as it moves from the northern plains into the Upper Midwest. An area of more numerous showers and thunderstorms is forecast to develop tonight into early Friday morning from eastern portions of the Dakotas into Minnesota. This area will then move east across the Upper Midwest during the day on Friday and into the Upper Great Lakes by Friday night. Post-Tropical Cyclone Bonnie will continue to linger near the North Carolina Outer Banks today before beginning to move a little more appreciably to the northeast by tonight. This will keep a chance for showers and thunderstorms in place across the Outer Banks through today, and locally heavy rainfall is possible. The same system that will finally help to move the remnants of Bonnie east will bring scattered areas of showers and thunderstorms to much of the eastern U.S. today and Friday. The majority of the western U.S. will remain dry through the next couple days as high pressure remains in place. High pressure will also lead to warm temperatures, and afternoon highs are forecast to be 10 to 15 degrees above average across much of the West today. The one exception will be portions of coastal Washington and Oregon, where a weakening Pacific front will bring clouds and a few showers today -- these will diminish by Friday, however. Temperatures will warm further by Friday, with some areas approaching 20 degrees above average. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php