Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 410 AM EDT Wed Apr 09 2025 Valid 12Z Wed Apr 09 2025 - 12Z Fri Apr 11 2025 ...Below normal temperatures continue across the East while well above normal and near-record warmth builds across the West... ...Severe weather expected across portions of the Mid/Deep South and Tennessee Valley on Thursday... ...Pair of low pressure systems to bring increasingly unsettled weather to much of the East Thursday into Friday... In the wake of a strong cold front, temperatures across much of the Eastern U.S. will continue to run 10 to 20 degrees below normal on Wednesday. After a very chilly start with lows nearing, at, or below freezing for many, high temperatures will range from the 20s and 30s across the northern interior sections of the Northeast, to the 30s, 40s, and 50s, from the Upper Midwest to the Mid-Atlantic. Farther south, highs will top out in the 50s, 60s, and 70s from the Ohio Valley and southern Mid-Atlantic to the Southeast and Gulf Coast. Despite some likely moderation, temperatures for most of the East will remain below normal into the weekend thanks to a large and deepening upper level trough and a pair of low pressure systems. In stark contrast, a large upper level ridge will build over the Western U.S. the next few days, resulting in mainly dry weather and well above normal temperatures. In fact, high temperature anomalies across the West will climb to between 10 and 30 degrees above seasonal norms through Friday, translating to highs in the 50s and 60s across the far north/Pacific Northwest, to the 70s and 80s outside of the mountains farther south, to the 90s and 100s across portions of the Desert Southwest and southern Plains. High temperatures may even approach or possibly break records for many places Thursday, Friday and into the weekend. As alluded to above, a highly amplified pattern will begin to take shape the next few days, with a large ridge building over the West and a deepening trough over the East. While the ridge will keep most of the West outside of the Pacific Northwest mainly dry through Friday, the trough will bring increasingly unsettled and stormy weather to the East. This period of wetter weather starts with a generally weak low pressure system that will track from the Upper Midwest, to the Ohio Valley, to the Great Lakes and Northeast through Thursday. This will bring light rain and snow showers to the region, with snow mainly confined to the Upper Midwest, Great Lakes, and interior Northeast. A second, stronger low pressure system will develop across the Ohio and Tennessee Valleys on Thursday before tracking into the Mid-Atlantic and Northeast Friday into Saturday. Ahead of the developing low, increasing moisture and instability will set the stage for a severe weather threat across portions of the Mid/Deep South and the Tennessee Valley on Thursday. As a result, the Storm Prediction Center has issued a Slight Risk (level 2/5) for potential severe thunderstorms that are capable of producing large hail and damaging winds. The severe weather threat then transitions to a concern for moderate to locally heavy rain across portions of the Mid-Atlantic and Northeast on Friday, with the Weather Prediction Center issuing a Marginal Risk (level 1/4) of excessive rainfall. While parts of the Mid-Atlantic and Northeast could certainly use the rain, isolated to scattered instances of flooding, particularly in urban, low-lying, or poor drainage areas, cannot be ruled out. Miller Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php