Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 PM EDT Sat May 02 2020 Valid 00Z Sun May 03 2020 - 00Z Tue May 05 2020 ...Cold front sweeping across the eastern U.S. to spark showers and thunderstorms this evening and Sunday, cooler temperatures return Monday... ...Showers and thunderstorms in the Pacific Northwest and Intermountain West this afternoon, stormy Sunday in the northern High Plains, Elevated fire weather risk to continue into the Southwest... ...A disturbance in the Southern Plains will make for a wet and stormy Monday in portions of the Heartland, hot across much of the South... Temperatures are warm across much of the eastern half of the U.S. this afternoon but the warmth will be short lived as a cold front advances east the remainder of the weekend. Showers and thunderstorms will breakout along the cold front this evening over the Lower Great Lakes and into the Central Plains. Some thunderstorms could be severe with the potential for excessive rainfall as well. The cold front will then push east into the Ohio Valley and Mid-Atlantic on Sunday where both regions are at risk of severe thunderstorms and excessive rainfall. The area most at risk for flash flooding Sunday lies in the eastern Ohio Valley and central Appalachians. By Monday, the cold front will have reached the Atlantic and in its wake turn temperatures to the cool-side from the Midwest to the Northeast. Much of the northeastern quarter of the U.S. will dry out Monday but a few spotty showers are possible across New England. Further west, a frontal boundary stationed over the Central Rockies will ignite showers and thunderstorms across the region this evening, some of which could be severe. Meanwhile, a Pacific frontal system will march its way through the Pacific Northwest tonight with numerous showers and some very high elevation snowfall in the forecast. This system will sail across the northern Rockies and a new wave of low pressure is likely to develop in the northern High Plains on Sunday. This newly developed area of low pressure should generate thunderstorms in its warm sector Sunday afternoon and evening. To the south, favorable fire weather conditions will continue in the southern Rockies and High Plains this afternoon where Red Flag Warnings are in place. An Elevated risk for fire weather conditions is also in place tomorrow for parts of the Southwest. By Monday, May 4th, the force will be strong with an area of low pressure over the Southern Plains as it generates showers and thunderstorms across the Nation's Heartland. There is the potential for severe weather and heavy rainfall just ahead of the storm in the Central Plains and Middle Mississippi Valley. In addition, warm and humid conditions are likely south of a warm front draped across the Mid-South and the Carolinas. In the Southwest, temperatures could exceed the century mark from west Texas to the Lower Colorado River Valley. Mullinax Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php