Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 307 PM EDT Fri May 24 2019 Valid 00Z Sat May 25 2019 - 00Z Mon May 27 2019 ...Additional rounds of severe weather and flash flooding are expected for the Memorial Day weekend across portions of the central and southern Plains along with the Midwest... ...Record heat and dry weather is expected across the Southeast U.S.... ...Very cool and unsettled weather continues for the West... Generally no big changes to the prevailing weather pattern is expected across the country for this Memorial Day weekend. Active weather is forecast to continue across the central part of the nation through the upcoming holiday weekend. This will be in response to a strong upper level trough situated over the Intermountain West and a large upper level ridge anchored over the southeastern U.S. A strong clash of air masses from the southern Plains to the Ohio Valley region will support multiple episodes of severe weather along with the threat for additional flash flooding in the general vicinity of a slow moving frontal boundary where multiple waves of low pressure will be developing along it. One low pressure system will be lifting northeast across the northern Plains and upper Midwest by this evening which will drive a cold front gradually across the Midwest, but the southwestern portion of this front will stall out and be draped well southwest down across the central and southern High Plains. Numerous heavy showers and thunderstorms will focus along this front this evening and through Saturday, bringing multiple threats of severe weather and strong concerns for flash flooding. In fact, the Storm Prediction Center currently has an Enhanced Risk area of severe weather over parts of west Texas for this evening and overnight, and then extending northward over a broader area of the central and southern High Plains through Saturday and Saturday night. Meanwhile, a Slight Risk of severe weather extends well to the northeast through the upper Midwest in vicinity of the aforementioned front. Heavy rainfall that is expected across this entire region will facilitate flash flood concerns, and the Weather Prediction Center has highlighted a High Risk of excessive rainfall through early Saturday morning for areas of north-central Oklahoma and southeast Kansas where additional heavy rain falling on extremely sensitive and generally saturated soil conditions will encourage significant runoff. The High Risk area is embedded within a broader Moderate Risk area that extends northeast up across a large area of the Midwest. A Moderate Risk of excessive rainfall includes a large area of the central Plains and middle MS Valley Saturday through Sunday. In terms of temperatures, readings will continue to be well below average for portions of the Rockies and extending westward across the Great Basin and Southwest given the presence of an upper level trough, cloud cover and plenty of shower activity. In some cases, temperatures will be as much 20 degrees below normal, and it will be cold enough across the higher terrain for some additional accumulating snowfall. Meanwhile, across portions of the Tennessee Valley, the Deep South and the Southeast, very dry conditions and record high temperatures are expected through the Memorial Day weekend as high pressure overhead will yield high temperatures soaring well into the 90s to near 100 degrees. Orrison Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php