Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 250 PM EST Sun Feb 24 2019 Valid 00Z Mon Feb 25 2019 - 00Z Wed Feb 27 2019 ...Heavy snow possible over parts of the Southern Cascades, Northern Sierra, Sawtooth, and Wind River Mountains... ...Heavy rain possible over the Oregon Coast and Northern/Central California Coast... Temperatures will be 25 to 40 degrees below average over parts of the Northern Rockies to the Upper Great Lakes... ...Heavy lake effect snow downwind from Lake Ontario... A strong storm over the Quebec/Ontario border move northeastward and slowly weaken. The pressure will be very deep with this storm and the associated pressure gradient will be very strong producing high wind over the Great Lakes into the Northeast. The wind will continue through Tuesday as the high wind ends west to east. The system will also produce snow over the parts of the Upper Mississippi Valley/Great Lakes into parts of the Ohio Valley. The strong wind will cause Blizzard conditions over the Upper Mississippi Valley into the Upper Great Lakes through Monday morning. Rain will develop over parts of New England into parts of the Northern Mid-Atlantic that will end overnight Sunday. As the rain moves out, snow will develop over the Lower Great Lakes into New England that will slowly taper off to lake effect snow by Monday evening. Meanwhile, an upper-level low over the Pacific Northwest will continue through Tuesday. A plume of moisture from the North Pacific will stream onshore over Northern California and Oregon through Monday. The moisture and energy will aid in producing coastal rain and higher elevation snow over the Pacific Northwest and Northern California. Overnight Monday, the moisture axis will move farther south into Central California as the rain and snow tapers off over Oregon. Rain and higher elevation snow will develop over parts of Central California on Tuesday. Snow will also develop over the Northern Intermountain Region and the Northern Rockies that will expand into parts of the Northern/Central Plains overnight Sunday. The snow will expand into parts of the Middle Mississippi Valley overnight Monday into Tuesday. Elsewhere, moisture will begin to flow northward from the Western Gulf of Mexico on Monday. Overnight Monday, rain with embedded thunderstorms will develop over the Western Gulf Coast that will expand into parts of the Southern Plains and the Lower Mississippi Valley on Tuesday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php