Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 321 AM EDT Tue May 31 2016 Valid 12Z Tue May 31 2016 - 12Z Thu Jun 02 2016 ...Locally heavy rain and flash flooding possible today across portions of the southern plains and Upper Midwest... ...Post-Tropical Cyclone Bonnie to linger along the Southeast U.S. coastline... ...Above average temperatures to expand across the western U.S... A low pressure system will move east across the northern plains today with the associated cold front extending into the southern plains. Scattered to numerous showers and thunderstorms are expected along ahead ahead of this front today from Texas to the upper Great Lakes. Locally heavy rain and flash flooding are possible today and tonight across portions of the southern plains as well as the Upper Midwest. On Wednesday, the northern portion of this system will cross the Great Lakes as the surface low moves into Ontario. The trailing end of the cold front will continue to move more slowly across Texas on Wednesday and Thursday, keeping showers and thunderstorms in the picture. Post-Tropical Cyclone Bonnie will continue to drift slowly along the coast of the Carolinas through the next couple days. As a result, scattered showers and thunderstorms will continue across the southeastern states today and Wednesday. By late Wednesday into Thursday morning, the remnant circulation of Bonnie will become absorbed into a frontal system approaching from the north. High pressure at the mid and upper-levels of the atmosphere will expand across the western U.S. through the next couple days, keeping generally dry conditions in place with above average temperatures. Afternoon high temperatures today are forecast to be 10 to 20 degrees above average across the West Coast States. On Wednesday, the warm temperatures will begin to expand into the Great Basin and Intermountain Region, with temperatures as much as 15 degrees above average. Temperatures across the Central Valley in California as well as the lower elevations of the interior Southwest may surpass 100 degrees. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php