Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 353 PM EDT Sun Apr 05 2020 Valid 00Z Mon Apr 06 2020 - 00Z Wed Apr 08 2020 ...Significant mountain snows, heavy rain, potential flash flooding, and gusty winds continue in California... ...Showers and thunderstorms forecast for the central and eastern U.S., with severe weather possible for the Ohio Valley Tuesday... ...Warming weather will engulf much of the eastern two-thirds of the U.S. for the first half of the week... An anomalously deep upper-level low is forecast to continue moving southward just offshore of California for the beginning of the week, causing persistent precipitation as copious amounts of moisture stream in. Heavy rain is possible in lower elevations of coastal California and into the valleys. This could cause flooding and flash flooding in some areas, particularly over burn scars, and runoff is possible in urbanized areas as well. There is a Moderate Risk of excessive rainfall in place today to outline this concern; the chance may lessen some by Monday, but there remains a Slight Risk of excessive rainfall outlooked then. Meanwhile in higher elevations of the Sierra Nevada, snow will continue to accumulate rapidly, and total amounts should be measured in multiple feet of snow through Monday. The Great Basin/Intermountain West can also expect precipitation with frontal systems in the vicinity, and the Wind River Mountains/Tetons are forecast to see several inches of snow through Monday. Furthermore, windy conditions and colder than normal temperatures are expected for California into parts of the Southwest. Farther east, areas from the Southern Plains to Mississippi Valley to the Eastern Seaboard could see scattered showers and thunderstorms over the next couple days. Rainfall chances should ramp up for the Ohio Valley Monday and especially into Tuesday with a warm front in the vicinity, and rainfall of an inch is possible in some areas, which could cause localized flooding problems. Severe weather will also be a concern--the Storm Prediction Center has outlooked a Slight Risk of severe weather for a good portion of the Ohio Valley on Tuesday. While the West will be experiencing cooler than average temperatures, temperatures from the Rockies eastward are forecast to warm quite a bit for the early part of the week. The most anomalous warmth can be expected for the Central Plains and portions of the Midwest Monday and Tuesday, with high temperatures nearing 70 as far north as South Dakota and Minnesota, 15 to 20 degrees above average. High temperatures around 10 degrees above normal will be widespread from the Gulf Coast to the Great Lakes and east to the Eastern Seaboard. Tate Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php