Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 302 PM EDT Fri Aug 14 2015 Valid 00Z Sat Aug 15 2015 - 00Z Mon Aug 17 2015 ...Severe thunderstorms possible for portions of the northern Intermountain West today and the northern plains on Saturday... ...Above average temperatures across the northern plains and Midwest will spread eastward through the weekend... A relatively strong upper-level disturbance for mid-August is moving into the Pacific Northwest this afternoon. The disturbance and the associated surface cold front will move eastward this evening toward the northern Intermountain States. Onshore flow behind the front will bring showers and thunderstorms to much of the Northwest, with the most widespread precipitation occurring in the Cascades. Precipitation should end quickly across the Cascades tonight as the system quickly moves east. Farther east, ahead of the cold front, scattered showers and thunderstorms are possible this evening across the Intermountain West. The Storm Prediction Center is forecasting a slight risk of severe thunderstorms across portions of the northern Intermountain West this evening/tonight. On Saturday, the cold front will quickly move into the northern plains as the deepening surface low moves across the plains of southern Canada. Scattered showers and thunderstorms are expected across the northern/central plains on Saturday. The Storm Prediction Center is forecasting a slight risk of severe thunderstorms on Saturday across portions of the northern plains. Above average temperatures are expected ahead of the cold front on Saturday across the northern plains and Midwest, with afternoon high temperatures 10 to 15 degrees above average. The warm air mass will move east on Sunday, with temperatures 10 to 15 degrees above average from the Great Lakes to the Northeast. A stationary surface frontal boundary will remain in place generally along the Gulf Coast through the next couple days, resulting in scattered showers and thunderstorms, primarily during the afternoon and evening. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php