Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 236 AM EDT Sun Jun 21 2020 Valid 12Z Sun Jun 21 2020 - 12Z Tue Jun 23 2020 ...Severe weather and flash flooding are possible with storms in the Plains/Midwest through Tuesday... ...Hotter than average temperatures continue for the Northeast while heat builds across portions of the West... Out West, a building warm core high pressure system will lead to heat building into California and the Great Basin, which peaks on Monday in the Great Basin before a front settles into the region, leading to some relief. Record high temperatures will be possible in and near northern California on Monday and Tuesday. The building high will foster hot temperatures across the adjoining Southern Plains, with a risk of record highs near the Trans Pecos region of Texas on Monday. 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. Roth Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php