Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 429 PM EDT Tue May 25 2021 Valid 00Z Wed May 26 2021 - 00Z Fri May 28 2021 ...Showers and thunderstorms will continue across the Great Plains and Midwest, spreading into the Northeast on Wednesday... ...A brief period of abnormally high temperatures expected along the East Coast on Wednesday... ...A round of wet snow in the northern Rockies and North Dakota will precede the development of more strong to severe thunderstorms in the northern/central Great Plains and Midwest... A deep low pressure system over south-central Canada will follow a northeast trajectory throughout the short-range period, intensifying as time goes on. As the trailing cold front extending from the Great Lakes through the southern Plains propagates east and interacts with the unstable air ahead showers and thunderstorms are expected to develop, some of which may become severe. Through tomorrow morning the Storm Prediction Center has issued a slight risk of severe weather for portions of the southern Great Plains and Upper Great Lakes, where large hail and damaging winds will be the primary hazards of concern. The Weather Prediction Center has also highlighted portions of east Texas and the Lower Red River Valley as being at slight risk for excessive rainfall and the potential for flash flooding. Overnight, showers and thunderstorms will spread into the Ohio Valley, Mid-Atlantic, and Northeast regions ahead of the trailing cold front. Along with East Coast temperatures forecast to reach double digits above normal into the 80s and 90s on Wednesday, severe thunderstorms capable of producing damaging wind gusts, hail, and a couple tornadoes are expected to develop in portions of the Northeast. Once the cold front passes through the eastern seaboard early Thursday morning, dry conditions will persist for the remainder of the day and temperatures will drop slightly below normal. To the west of the Canadian low pressure system, a draping cold front over the northern Rockies and Great Plains as well as a developing cold front over the central Great Basin will usher in cooler temperatures over the northern Mountains. Upslope flow along the northern Rockies associated with these systems is expected to bring wet snow to portions of Wyoming and Idaho early Wednesday. As these frontal systems strengthen and propagate out of the mountains they will serve as the impetus for more rain and severe weather, the focus of which will be in the central Plains where the Storm Prediction Center has issued an enhanced risk of severe weather. As in the Northeast, the primary concerns will be the development of damaging wind gusts, hail, and a couple tornadoes. By Thursday morning the low pressure system and its associated thunderstorms will push east toward the Mississippi Valley, leaving a trail of heavy rain that may pose flooding concerns over the central Plains and has been noted by the Weather Prediction Center as a region where a slight risk of excessive rainfall is possible. To the north, some wet snow may fall in North Dakota and portions of Wisconsin on the periphery of this system. Meanwhile, precipitation associated with the next Pacific system is forecast to reach the Pacific Northwest early on Thursday. Zavadoff Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php