Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 AM EDT Mon Mar 24 2025 Valid 12Z Mon Mar 24 2025 - 12Z Wed Mar 26 2025 ...Low pressure system brings snow across the Great Lakes today, severe thunderstorms and heavy rain across the Deep South this morning, and a quick round of moderate snowfall for Maine tonight... ...Wet weather across northwestern Washington state today is expected to taper off on Tuesday... ...Well above average, warm to hot early Spring temperatures will expand over the western/central U.S. this week with numerous record highs near the West Coast and Desert Southwest on Tuesday... The forecast period begins with a fairly deep low pressure system tracking eastward across the Great Lakes this morning. Widespread light to moderate snowfall will bring additional accumulations from the upper Midwest to the upper and central Great Lakes for today. By tonight, a low pressure wave is forecast to form near the New England coast as the complex frontal structure associated with the low pressure system consolidates over New England. This low pressure wave is expected to deliver a quick round of moderate snowfall for Maine tonight where upwards of 6 inches of total accumulations are possible. Lesser amounts are expected farther west across interior New England. The wave will quickly move away into southeastern Canada on Tuesday but the main low pressure system will be slow to exit the Great Lakes, allowing snow showers to linger, especially for the Snow Belt region where some lake-effect snows are expected to be around into Wednesday morning. To the south of the system, active strong to severe thunderstorms ahead of a trailing cold front are impacting much of the Deep South and as far west as eastern Texas. These activities are forecast to become less intense as they edge farther south toward the Gulf Coast later today. The cold front itself will sweep across East Coast today where pretty much everyone should receive showers and embedded thunderstorms this afternoon from southern New England southward. Behind the system cooler air will arrival but a pair of frontal boundaries interacting with a broad upper trough will send low pressure waves rapidly from the central Plains toward the East Coast, which will allow light rain to move quickly across the Ohio and Tennessee Valleys on Tuesday. By Wednesday morning, a low pressure wave should be consolidating while moving off the Mid-Atlantic coast with a period of intensifying rain and gusty winds from the central Appalachian eastward to the Mid-Atlantic. Meanwhile, a plume of plentiful moisture accompanying a frontal system will continue to lead to heavy rain along upslope portions of the Olympic Mountains and northern Cascades in Washington early today. The heavy precipitation will slowly wind down as today progresses. By Tuesday, the frontal system will lift farther north into British Columbia and weaken, which will allow this recent rain spell to end. A broad ridge of high pressure will gradually build and dominate the western U.S. heading into midweek. This ridge will allow temperatures to soar into record levels especially by Tuesday afternoon for the lower-elevations into the 70s and 80s up and down the West Coast just inland. In addition, temperatures in the Desert Southwest will soar well up into the 90s and may even reach the century mark at the hottest locations. The anomalous warmth will also expand eastward into the central and southern Plains where 90s will be common in Texas by Tuesday afternoon. Kong Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php