Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 354 AM EDT Sat Jun 01 2019 Valid 12Z Sat Jun 01 2019 - 12Z Mon Jun 03 2019 ...Heavy rainfall and severe thunderstorms possible on Saturday from the Southern High Plains to the Midwest... ...Severe thunderstorms are possible on Sunday across parts of the Northeast and the southern High Plains, with heavy rainfall also possible across parts of the central/southern Plains... ...Much above normal temperatures build across the Northwest while much below normal temperatures are likely for the Great Lakes region this weekend... A cold front dropping through the Central Plains and the Midwest today will serve as a focus for strong to severe thunderstorms. The Storm Prediction Center has highlighted a large area from the southern High Plains to the Midwest within a slight risk, with an embedded enhanced risk for parts of eastern Missouri and central Illinois. Storms may contain heavy rainfall with flash flooding a risk, particularly across parts of central Oklahoma which has already seen above normal rainfall and remains susceptible to any additional rainfall. WPC has a slight risk for flash flooding also across parts of the northern Ohio Valley where the boundary may be slower to move through on Saturday. On Sunday, the cold front pushes into the Northeast with another round of strong to severe thunderstorms possible from northern Virginia to southern New England where SPC shows a slight risk. This cold front will also usher in a much cooler air mass with daytime highs as much as 10 to 15 degrees below normal possible especially across the Great Lakes on Sunday. Farther west, the boundary is forecast to stall across parts of the Southern Plains with another day of heavy rainfall and a threat for flash flooding on Sunday from the Texas Panhandle to southern Kansas. Severe weather is also possible across parts of the Southern High Plains as energy from a western U.S. system interacts with the boundary. A persistent upper level low over the Southwest and Great Basin will continue to support daily and diurnally driven showers and storms this weekend with heavy rainfall and localized flash flooding possible, particularly along favored terrain. This upper level feature will keep temperatures relatively cool and near or below normal through the weekend. Meanwhile to the north, an upper ridge building across the Northwest to the Northern High Plains will result in much above normal temperatures, with daytime highs 10 to 20 degrees above average. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php