Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 217 PM EDT Sun May 26 2019 Valid 00Z Mon May 27 2019 - 00Z Wed May 29 2019 ...Areas of severe weather and flash flooding are expected through Memorial Day across portions of the Plains and Midwest... ...Record heat and dry weather is expected across the Southeast U.S. into early next week... ...Very cool and unsettled weather continues for the Intermountain West and Northern Plains... Weather conditions will continue to remain quite unsettled across large portions of the country and especially the central and western U.S. going into the beginning of the week, with additional heavy rain and severe thunderstorms expected. This is in response again to a strong and rather anomalous upper level trough situated over the Intermountain West while a strong deep layer ridge of high pressure remains anchored over the southeastern U.S. The next organized surface low develops across the western High Plains beginning by this evening and will help facilitate the next organized round of strong to severe thunderstorms from the Texas Panhandle to southern Minnesota. In fact, the Storm Prediction Center has highlighted an area from the Texas and Oklahoma Panhandles north into far eastern Colorado and western Kansas in a Moderate Risk of severe weather with a strong concern for very large hail, damaging winds and tornadoes for this afternoon and evening. Meanwhile, the flash flooding threat will continue to exist across much of this same general area, with locally inundating rainfall over the past few days making the ground quite saturated and highly sensitive to additional rainfall. The Weather Prediction Center has highlighted a Moderate Risk of excessive rainfall across portions of the central Plains through tonight with the potential for as much as 3+ inches of rain from the heavy shower and thunderstorm activity. On Memorial Day, the threat of severe weather and heavy rainfall will shift just a bit farther to the north and east and will include more areas of the Midwest. Also, areas back to the northwest across the eastern slopes and adjacent High Plains of Montana and Wyoming will see the potential for heavy rainfall as low pressure deepens over the central Plains and stronger easterly upslope flow takes aim on the terrain. There will be sufficient rainfall with locally 1 to 2+ inches for there to be some flooding problems. There will be a dichotomy of temperature anomalies across the U.S. through Memorial Day. Expect readings to be below normal across the northern plains, and also for the Intermountain West and Desert Southwest. With the anomalous upper level low tracking southward along the West Coast and then the Four Corners region by Monday night, temperatures will be rather pleasant across the normally hot lower elevations of the Desert Southwest, and quite cool across the higher elevations. Farther east across the Deep South and the Carolinas, record high temperatures will continue to be possible through Memorial Day, with highs soaring well into the 90s and lower 100s for some areas. The northeast part of the nation from the Great Lakes to the Northeast will be cooler than normal as a cold front crosses the region and allows cool high pressure filter south from Canada. This front though will stall out and become hung up over areas of the Ohio Valley and Mid-Atlantic region. Multiple waves of low pressure advancing east along the front will foster multiple rounds of showers and thunderstorms which may cause some localized concerns for severe weather and flash flooding across these areas through the early part of the week. Orrison Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php