Short Range Forecast Discussion...Correction NWS Weather Prediction Center College Park MD 345 PM EST Mon Feb 25 2019 Valid 00Z Tue Feb 26 2019 - 00Z Thu Feb 28 2019 ...Heavy rains for Northern/Central California, with flooding possible... ...Heavy snow expected in the Cascades, Sierra Nevada, Tetons, and Sawtooth mountains... ...Temperatures will be 20 to 30 degrees below average from the Northern High Plains to the Upper Great Lakes and the Central Plains... ...High wind weaken for the Mid-Atlantic to Northeast later today... A deep upper-level low just off the Northwest Coast will linger over the region through Wednesday evening. A plume of moisture off the Pacific will stream into Central California through Wednesday morning when the moisture axis moves farther south into Southern California by Wednesday evening. The moisture and upper-level energy will aid in producing rain over parts of the Southern Oregon Coast into Northern/Central California with the rain exiting Oregon overnight Monday. The rain will be heavy at times and continue into Wednesday. Snow, heavy at times, will develop over the higher elevations of Northern/Central California through Wednesday. Snow will also develop over interior parts of the Northwest through Wednesday, too. Likewise, snow will develop over the Northern Intermountain Region into the Northern Rockies that will expand into the Northern Plains by overnight Monday. Snow will continue over the region into Wednesday. Meanwhile, energy racing out over the Northern Tier States will move across the Upper Great Lakes on Wednesday. The energy will aid in producing snow over parts of the Upper Great Lakes/Upper Mississippi Valley overnight Tuesday, expanding into the Lower Great Lakes by Wednesday evening. Moisture from the Western Gulf of Mexico will stream northward over the Western Gulf Coast that will expand into the Eastern/Central Gulf Coast by Tuesday morning that will continue into Wednesday. In addition, impulses of upper-level energy will aid in producing rain with embedded thunderstorms over the Western Gulf Coast into the Central Gulf Coast overnight Monday. The rain with embedded thunderstorms will expand into the Eastern Gulf Coast on Tuesday. Overnight Tuesday, the rain and embedded thunderstorms will move into parts of the Southeast. On Tuesday afternoon, as moisture moves northward over the Southern/Central Plains, rain will develop over the area. With the cold air over the Plains, pockets of rain/freezing rain will develop over parts of the Central/Southern Plains on Wednesday. The strong pressure gradient over the Northeast will slowly weaken Monday night, ending the high wind threat. In the wake of the exiting system that aided in producing the high wind, lake effect snow will develop downwind of Lake Ontario through Tuesday afternoon. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php