Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 235 AM EDT Tue Aug 23 2016 Valid 12Z Tue Aug 23 2016 - 12Z Thu Aug 25 2016 ...Severe thunderstorms and heavy rain possible today across portions of the central plains and Midwest... ...Stationary front to keep scattered showers and storms possible across the southern states... ...Temperatures will steadily warm across the Pacific Northwest by midweek... A cold front will move into the central U.S. today. Showers and thunderstorms are expected ahead of the front today and tonight. Showers and storms are expected to be most numerous this afternoon and evening across the central plains into portions of the Midwest, where severe thunderstorms along with heavy rain are possible. Please refer to products issued by the Storm Prediction Center for further details on the severe weather threat. On Wednesday the front will continue to move east, with showers and thunderstorms expected from the Great Lakes to the mid-Mississippi valley and once again across portions of the central plains. The trailing end of this frontal boundary will become nearly stationary across the central Rockies today and will linger through Thursday. This front, along with monsoonal moisture streaming into the southwestern U.S., will focus areas of showers and thunderstorms across the Four Corners region and the central Rockies through Thursday. High pressure will remain in place today across the eastern U.S., keeping conditions dry from the Ohio valley to the Mid-Atlantic and Northeast with temperatures near seasonal average values. Farther south, a weakening stationary frontal boundary will linger across the Southeast today before washing out on Wednesday. This front will keep scattered showers and thunderstorms a possibility through the next couple days. The Pacific Northwest will see a steady warming trend through the week as a ridge of high pressure aloft partially builds back into the region. Temperatures today are expected to be about 5 degrees above average. By Wednesday and Thursday, however, temperatures will rise to 10 to 15 degrees above average. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php