Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 439 AM EDT Sun May 03 2020 Valid 12Z Sun May 03 2020 - 12Z Tue May 05 2020 ...A Pacific front will spread wintry precipitation across the northern Rockies before triggering thunderstorms for the northern High Plains later today... ...A disturbance in the southern Plains will make for a wet and stormy Monday in portions of the Heartland... ...Cool conditions expected for the Northwest and Northeast while afternoon heat continues across the South... One more day of warm temperatures is expected along much of the Eastern Seaboard today before a large dome of cool air settles into the Great Lakes and the entire Northeast for the next couple of days behind an exiting low pressure complex. A trailing cold front from the low will continue to be a focus for showers and thunderstorms across the Ohio Valley today before moving into the Mid-Atlantic this evening with locally heavy rain possible. Fine weather will move in on Monday but it will turn much cooler behind the cold front. Some showers will still linger across northern New England into Tuesday morning on the back side of the departing low pressure system. Meanwhile, a Pacific frontal system will march its way through the northern Rockies with numerous showers and some very high elevation snowfall today. A new wave of low pressure is likely to develop in the northern High Plains this evening where thunderstorms can be expected. A swath of rain ahead of this wave will continue to move across the northern Plains on Monday, reaching the upper Midwest Tuesday morning where mixed wintry precipitation is possible. By Monday, strong dynamics associated with a developing low pressure system over the southern Plains will trigger strong to possibly severe thunderstorms to move across the Nation's Heartland, with the highest potential over the Mid-Mississippi and Ohio Valley Monday evening. Heavy rainfall will also be possible in these areas. By Tuesday morning, the highest chance of rain should be crossing the southern Appalachians into the Carolinas and Virginia. Warm and humid conditions are expected to continue across the South for the next couple of days. High temperatures could threaten the daily records as afternoon readings could exceed the century mark at some locations across western Texas. In addition, fire weather conditions will be elevated from the southern Rockies to the southern High Plains under dry conditions with gusty winds for the next couple of days. Kong Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php