Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 355 AM EDT Mon Apr 06 2020 Valid 12Z Mon Apr 06 2020 - 12Z Wed Apr 08 2020 ...Significant mountain snows, heavy rain, potential flash flooding, and gusty winds continue in California today... ...Areas of showers and thunderstorms across portions of the central and eastern U.S., severe weather and flash flooding possible in the Ohio Valley Tuesday shifts to the Mid-South on Wednesday... ...Warm temperatures to consume much of the eastern two-thirds of the U.S. for the first half of the week... An exceptionally deep upper-level low is forecast to spend the first half of the week near Southern California with the worst impacts expected to be felt today. This morning, heavy snow continues to fall in the southern Sierra Nevada as well as the San Gabriel and San Bernadino mountain ranges. In addition, heavy rain is falling along the coastal range and in the valleys. The risk for flooding and flash flooding in some areas, particularly over burn scars, and runoff is possible in urbanized areas as well. A Slight Risk of excessive rainfall remains in place for portions of Southern California into this afternoon as the heaviest rainfall pushes south towards San Diego. Farther west, the Great Basin/Intermountain West can also expect precipitation as the frontal system slowly advances inland today and Tuesday. The Wind River Mountains/Tetons are forecast may also pick up several inches of snow through Monday and into early Tuesday. Furthermore, windy conditions and colder than normal temperatures are expected for California into parts of the Southwest. Heading east, areas from the Southern Plains and Midwest to the Eastern Seaboard should see scattered showers and thunderstorms flare up over the next couple days. Monday could feature potential severe weather in the Lower Great Lakes and southern Mid-Atlantic with a more organized threat for severe weather in the Ohio Valley on Tuesday. Flash flooding will also be a potential concern in these regions through Tuesday. By Wednesday the severe threat shifts to the Mid-South and persists in the Mid-Atlantic. While the West experiences cooler than average temperatures, most locations from the foothills of the Rockies to the East Coast will encounter above normal temperatures. By Tuesday, high temperatures will hover around 80 degrees in parts of the Plains, Midwest, and much of the South. Portions of the Mid-Atlantic may see high temperatures make a run at 80 degrees on Wednesday. The run of above normal temperatures appears to be short lived though as a potent cold front ushers in below normal temperatures to the eastern two-thirds of the Lower 48 the second half of the week. Mullinax Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php