Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 350 PM EDT Mon May 24 2021 Valid 00Z Tue May 25 2021 - 00Z Thu May 27 2021 ...Continuing rounds of showers and thunderstorms found across the Great Plains and Midwest before spreading into the Northeast on Wednesday... ...Record heat forecast across the Mid-Atlantic States by midweek... Potentially hazardous weather will continue to be found across the central U.S. over the next few days as ample moisture continues to stream northward out of the western Gulf of Mexico. A potent low pressure system located over south-central Canada will slowly drift eastward through Tuesday before strengthening and racing northeastward. Meanwhile, an attached stationary boundary and slow moving cold front will be the focus for showers and thunderstorms tonight and Tuesday from the southern/central Plains to the Midwest. A few thunderstorms may turn severe from the southern High Plains to Nebraska, with the highest chances for isolated tornadoes and large hail found across western Kansas tonight. Flash flooding is also a possibility across the central and southern Plains where thunderstorms stall or repeat over similar locations. Southeast Texas has received an abundance of rainfall over the last few weeks and additional thunderstorms over this region could lead to more flooding concerns this evening. WPC has issued a Slight Risk of Excessive Rainfall over parts of southeast Texas tonight, with Flash Flood Watches also in effect. A separate system currently entering the Pacific Northwest is forecast to reach the central High Plains by Wednesday and produce an additional round of spring thunderstorms across the central Plains. The Storm Prediction Center has issued a slight risk of severe weather from eastern Wyoming to southwest Iowa and northwest Missouri on Wednesday. Showers will likely be found across the northern Rockies and Great Basin on Tuesday and Wednesday as well. Throughout the eastern U.S., the brief shot of cool weather today across the Mid-Atlantic and Northeast will be short lived as a warm front lifts across the region by Wednesday. In fact, record-breaking warmth is forecast from North Carolina to New Jersey. High temperatures are expected to reach the low-to-mid 90s and around 10 to 20 degrees above average. The combination of warm temperatures and an approaching cold front may also lead to scattered thunderstorms Wednesday evening, with a few severe thunderstorms not out of the question. Snell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php