Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 323 PM EDT Mon May 27 2019 Valid 00Z Tue May 28 2019 - 00Z Thu May 30 2019 ...Additional heavy rain and severe thunderstorms expected across the central United States through Wednesday... ...Severe thunderstorms possible across the Ohio Valley and Northeast Tuesday... ...Early-season heat continues across the Southeast... Weather conditions will continue to remain quite unsettled across large portions of the nation and especially the central U.S. going into the middle of the week, with additional heavy rain and severe thunderstorms expected. This is in response 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. An organized surface low is tracking across the Midwest Monday afternoon and will cross into the Lower Great Lakes on Tuesday. This will result in an area of heavy rain and thunderstorms across the Midwest tonight. A few storms will have the chance to turn severe. By Tuesday, the severe threat associated with the aforementioned low-pressure will shift into the Ohio Valley and Northeast. A second area of low-pressure is forecast to develop across southeast Colorado this evening and produce another round of heavy rain and thunderstorms. Portions of the northern Rockies are under Winter Storm Warnings and Flash Flood Watches, as heavy precipitation overspreads the area. The low-pressure system will enter the Central Plains on Tuesday and be slow to move. Additional heavy rain and severe thunderstorms will be possible through Wednesday across the Central and Southern Plains as a result, extending into the Mississippi Valley as well. There will be a dichotomy of temperature anomalies across the U.S. through the middle of the week. Expect readings to be below normal across the central Plains, Rockies, Intermountain West and Desert Southwest. With the anomalous upper level low tracking across 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. Temperatures will also be on the chilly side across northern New England, where Freeze Warnings and Frost Advisories have been issued for Monday night/Tuesday morning. Across the Southeast, record high temperatures will continue to be possible through Wednesday, with highs soaring well into the 90s and lower 100s for some areas. Snell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php