Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 327 PM EDT Fri Mar 28 2025 Valid 00Z Sat Mar 29 2025 - 00Z Mon Mar 31 2025 ...The heavy rain and flash flood threat moves away from South Texas and into East Texas and Louisiana this afternoon into tonight... ...Much above average temperatures from the Central to Southern Plains, east into the eastern U.S., while below average temperatures stretch along the northern tier from the Northern Plains into northern New England... ...Winter weather threats continue along the northern tier from the Northern Plains, into the Upper Mississippi Valley, Upper Great Lakes, far northern NY State and central to northern New England... ...Severe weather threat across the Southern to Central Plains into the Lower Missouri Valley on Saturday and through the Lower to Mid Mississippi Valley, Tennessee Valley and Ohio Valley on Sunday... ...A brief period of drier weather for the Pacific Northwest into Northern California on Saturday before more rains return to this area Sunday... After several days of very heavy rainfall across South Texas, where rainfall totals of 6 to 12"+ have been observed, the upper level disturbance that has been producing the wet weather will move eastward into East Texas and Louisiana tonight into Saturday. This will shift the threat of heavy rainfall and flash flooding into East Texas and across Louisiana over next 24 hours. Rainfall totals are not expected to be as extreme as was observed over South Texas. Still, heavy rains may produce localized flooding from this afternoon into Friday night from East Texas into Louisiana where flood watches are currently in effect. Much of the nation to the east of the Rockies will see much above average temperatures this weekend. Much above average temperatures are expected to stretch from the Central to Southern Plains, eastward into much of the Mississippi Valley, Ohio Valley and large portions of the east coast. Colder than average temperatures are expected to persist across the northern tier from the Northern Plains into the Upper Mississippi Valley, Upper Great Lakes, far northern NY State and into central to northern New England. In addition to the colder than average temperatures across the northern tier, there will be potential for two rounds of accumulating snow and ice. The initial round will spread wintry weather from northern Minnesota into the Upper Peninsula of Michigan, far northern NY State and northern New England through Friday night and into continuing Saturday from the Upper Peninsula of Michigan, far northern NY State into northern New England. This will be followed by a second batch of wintry weather developing across the Central to Northern Plains Saturday and moving into the Upper Mississippi Valley/Upper Great Lakes Saturday night/early Sunday and back across portions of central to northern New England during the day on Sunday. Snow totals from the two events may reach as high as 6 to 8 inches across portions of the Upper Peninsula of Michigan, far northern NY State, northern Vermont, northern New Hampshire, and western Maine. Ice accumulations of .25-.50"+ are possible from northern Wisconsin, across the northern Lower Peninsula of Michigan, eastern Upper Peninsula of Michigan, northern NY State and across much of Vermont and New Hampshire. The colder than average air over the northern tier will begin to surge southward into the Central Plains on Saturday and Southern Plains on Sunday. Thunderstorms are expected to become increasingly active along and ahead of this front this weekend. This will bring the potential for severe weather on Saturday across the Southern to Central Plains into the Lower Missouri Valley and through a larger region from the Lower to Middle Mississippi Valley, Tennessee Valley and Ohio Valley on Sunday. After several days of wet weather from the Pacific Northwest into Northern California, drier conditions are expected Saturday. However, this will be short lived as the next system moving off the northeast Pacific will spread the threat of additional rains into northern California and the Pacific Northwest on Sunday. Oravec Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php