Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 PM EDT Sun Jun 21 2020 Valid 00Z Mon Jun 22 2020 - 00Z Wed Jun 24 2020 ...There is a moderate risk of over parts of the Central/Southern Plains... ...There is a slight risk of excessive rainfall over parts Middle Mississippi Valley and Central/Southern Plains... ...Temperatures will be 5 to 10 degrees above normal over parts of Northern California and the Lower Great Lakes to Northern New England... A front extending from the Great Lakes across the Middle Mississippi Valley/Central Plains to the Central High Plains will slowly move to the Lower Great Lakes southwestward to the Southern Plains by Tuesday evening. Moisture from the Western Gulf of Mexico will stream northward over the Plains and pooling along the boundary aiding in the development of showers and thunderstorms through Tuesday evening. The SPC has issued a moderate risk of over parts of the Central/Southern Plains with a slight risk extending from Upper/Middle Mississippi Valley and the Northern/Central Plains southward to the Southern Plains. The main hazards with these thunderstorms will be large hail over two inches, damaging thunderstorm wind, as high as 75 mph, wind-driven hail, and some tornado risk. The WPC has issued two areas of slight risk of excessive rainfall over parts Middle Mississippi Valley and Central/Southern Plains. With persistent upper level troughing mid-continent and an expanding Bermuda High east of Florida, moisture generally funnels between the Rockies and Appalachians where the heaviest rainfall and largest concentration of thunderstorms is forecast, focusing on fronts moving through the area and outflow boundaries that run ahead of the fronts. North of the primary front, the coolest temperatures are expected to persist across the north-central United States. Near fronts, in the vicinity of a dryline in the Southern and Central Plains, and along residual outflow boundaries marching ahead of the fronts, Slight to Enhanced Risks of severe weather are outlooked by the Storm Prediction Center for parts of the Plains and Midwest through Tuesday, with the severe weather risk remaining in and near Oklahoma each day. These thunderstorms will be capable of heavy rainfall, with the broader areas of a Slight Risk of excessive rainfall/flash flooding depicted in the Plains/Midwest on Sunday before receding towards Oklahoma on Monday and the ArkLaTex on Tuesday. Farther east, unsettled weather is also expected toward the Eastern Seaboard, with scattered thunderstorms forecast. The most anomalous temperature departures from normal over the next few days are forecast for the Northeast, where highs at or above 90 degrees possible. Monday appears to be when record high temperature are most threatened, in and near Vermont. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php