Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 AM EDT Sun Jul 02 2017 Valid 12Z Sun Jul 02 2017 - 12Z Tue Jul 04 2017 ...Strong to severe thunderstorms could lead to flash flooding today in the southern Plains and New England... ...Showers and thunderstorms are expected to move across the eastern U.S. today ahead of a cold front... A broad upper-level trough axis over the Great Lakes will slowly move eastward into New England during the next couples of days. This will keep a frontal boundary near the mid-Atlantic and New England coastal areas through Monday while replenishing cool air from Canada moves into the northern part of the U.S. Much of the rain associated with the front is moving off New England this Sunday morning. However, the trailing portion of the front is forecast to be nearly stationary from the mid-Atlantic westward into the central Plains. The heat and humidity south of the front will continue to promote scattered showers and thunderstorms across the Deep South down into Florida as well as over the central Plains for the next couple of days. Meanwhile, a secondary cold front will trigger showers and thunderstorms today over the Great Lakes, and into upstate New York by tonight. The western end of the front is forecast to edge slowly into the northern High Plains where the chance of thunderstorms will be increased today. By this evening, the best chance of strong to severe thunderstorms will shift into the central Plains as the secondary front merges with the primary front to the south. Thunderstorms should become less active on Monday but with the primary focus remaining over the central Plains. Please refer to SPC for additional details on the threat for severe weather. Meanwhile, generally quiet conditions can be expected over the western U.S. through Monday. A front is forecast to dissipate before reaching the West Coast today. Temperatures will be slightly above normal with a few showers and thunderstorms over the interior mountains, somewhat more numerous over the central to southern Rockies especially during the afternoon and early evening hours. Otherwise, dry conditions should prevail, which will keep the fire danger high over the Desert Southwest. Kong Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php