Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 212 PM EST Sun Feb 02 2025 Valid 00Z Mon Feb 03 2025 - 00Z Wed Feb 05 2025 ...Heavy snow across parts of Northern California/Pacific Northwest to the Northern Rockies and the Sierra Nevada Mountains on Monday... ...There is a Slight Risk of excessive rainfall over parts of Northern/Central California... ...Light to moderate snow from the Northern Plains to the Northeast and areas of wintery mix from Wisconsin to Pennsylvania... Upper-level energy and moisture from the Pacific will continue to stream into parts of the Northwest and California. A plume of moisture will stream into Northern/Central California, producing heavy rain through Tuesday evening. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of Northern California on Sunday and Monday and over parts of Northern/Central California on Tuesday. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, small streams, narrow canyons/gullies, and burn scars the most vulnerable. In addition, the moisture and energy will produce heavy snow over parts of Northern California/Pacific Northwest into the Northern Rockies from Sunday evening into Monday evening. On Monday evening into Tuesday, the snow will be light to moderate over Northern California and the Pacific Northwest, with moderate to heavy snow over parts of the Northern Intermountain Region and Northern Rockies. Moreover, moderate to heavy snow will develop over the Sierra Nevada Mountains from Monday evening into Tuesday. As upper-level energy spreads eastward over the Plains and Mississippi Valley overnight Sunday into Monday, light to moderate snow will expand out of the Northern Rockies into the Northern Plains and into the Upper Mississippi Valley by early Monday morning. The snow will begin to wane over the Upper Midwest on Monday afternoon into Monday evening. Meanwhile, low pressure and associated front over parts of Ontario, Canada, will move eastward to Southeastern Canada by Tuesday. By Sunday evening, the system will produce light snow over parts of the Great Lakes and Northeast. Rain will also develop over parts of the Ohio Valley. Along the rain/snow line, pockets of rain/freezing rain will develop over parts of the Upper Midwest into the Ohio Valley and expand into parts of New York State and Pennsylvania. Moreover, the light snow and rain will continue over parts of the Northeast through Tuesday evening. Lastly, cold high pressure over Central Canada will stream cold air over parts of the Northern Rockies/Northern High Plains, with temperatures 15 to 30 degrees below average by Monday evening Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php