Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 245 PM EST Sat Feb 01 2025 Valid 00Z Sun Feb 02 2025 - 00Z Tue Feb 04 2025 ...Heavy snow across parts of Northern California/Pacific Northwest to the Northern Rockies... ...There is a Slight Risk of excessive rainfall over parts of Northern/Central California... ...Light to moderate snow from the Great Lakes to the Northeast and areas of wintery mix from Wisconsin to Pennsylvania... Upper-level energy and moisture from the Pacific will stream into parts of the Northwest and California. A plume of moisture will stream into Northern/Central California, producing heavy rain through Monday. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of Northern/Central California each day through Monday evening. 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, likewise through Monday. The heaviest snowfall totals will be near or above 48 inches in the Rockies. Meanwhile, low pressure and associated front over parts of the Northern Plains will move eastward to Southeastern Canada by Monday. By Saturday evening, the system will produce light snow over parts of the Upper Mississippi Valley/Upper Great Lakes. Rain will also develop over parts of the Middle Mississippi Valley. By Sunday, along the rain/snow line, pockets of rain/freezing rain will develop over parts of the Upper Midwest into the Ohio Valley. By Sunday evening, snow and rain will move into the Lower Great Lakes/Northeast along with pockets of rain/freezing rain over the rain/snow line over parts of New York State and Pennsylvania. Moreover, the light snow and rain will continue over parts of the Northeast through Monday evening. Additionally, light snow will develop over parts of the Northern High Plains to the Upper Great Lakes overnight Sunday, tapering off by Monday morning. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php