Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 402 AM EDT Tue May 07 2019 Valid 12Z Tue May 07 2019 - 12Z Thu May 09 2019 ...Moderate Risks of both severe weather and flash flooding are in place for parts of the Plains today... ...Snow is expected in the Rockies and even in parts of the Midwest... An active springtime weather pattern continues across the U.S. for midweek. A front is expected to stall in the Central Plains and Middle Mississippi Valley today, eventually lifting north as a warm front on Wednesday. A dryline will also persist in the Southern High Plains. Moisture from the Gulf will flow in ahead of these features, causing widespread rain and thunderstorms in much of the Plains. For Tuesday, a Moderate Risk of severe weather is in place ahead of the dryline in the Texas panhandle and in western Oklahoma, with tornadoes, high winds, and large hail all possible. The highest threat of flash flooding is expected to be farther north in Kansas, where there is a Moderate Risk of excessive rainfall in place, especially due to the wet and/or flooded conditions already occurring there. On Wednesday, the upper-level trough shifts a bit farther east, and the highest threats of severe weather and flash flooding will move into the Ark-La-Tex region. Currently, a Moderate Risk of flash flooding is outlooked there for Wednesday with forecast rain totals of widespread 2 to 4 inches, and an Enhanced Risk of severe weather is in place there too. Additionally, rainfall will increase on Wednesday across the Midwest as the front lifts north, and a Slight Risk of flash flooding is outlooked there. By Thursday morning, the cold front will move eastward and clear out the moisture in much of the Plains, with the exception of southern Texas, which could see additional heavy rain on Thursday before the front passes. The western edge of the aforementioned front is expected to stall in the Central Rockies on Tuesday and Wednesday, eventually shifting southward by Wednesday night. A few rounds of upper-level energy are forecast to move through the West, with surface fronts traversing the region as well. All this will lead to active weather in the West, with scattered showers and thunderstorms expected across the Great Basin and Rockies on Tuesday and Wednesday. Snow is likely in higher elevations as colder than average temperatures settle in; the Central Rockies in particular is forecast to see 6 to 12 inches of snow through Wednesday night. Conversely, the Pacific Northwest will remain warmer than average and dry. Elsewhere, the main front across the U.S. will be more progressive farther east--a cold front and associated showers and thunderstorms along it will track across the Northeast on Tuesday and the Mid-Atlantic on Tuesday night. The front will delineate warmer than average and colder than average temperatures across the country. High temperatures of 15 to 25 degrees below normal are expected in the Central/Northern Plains on Tuesday, shifting into the Midwest on Wednesday as the Plains only gets colder (highs are forecast to be 20 to 30 degrees below average in the Central/Northern Plains). With the cold temperatures in the Midwest, snow is expected by Wednesday night across northern Wisconsin and the Upper Peninsula of Michigan, and a few inches of snow could accumulate there. South of the warm front, above average temperatures are forecast for the Ohio and Tennessee Valleys and the Southeast. Tate Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php