Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 305 AM EST Mon Feb 26 2018 Valid 12Z Mon Feb 26 2018 - 12Z Wed Feb 28 2018 ...Heavy snow possible for the Cascades, Northern Rockies, Sierras, and the San Gabriel Mountains... ...Snow possible over parts of the Mogollon Rim... ...Heavy rain possible over parts of the Tennessee Valley... A front extending across the Southeast into Central Gulf Coast will move southward into the Gulf of Mexico by Monday evening and linger across parts of Florida into Tuesday evening. The system will produce showers and thunderstorms along parts of the Central/Eastern Gulf Coast through Monday afternoon. Rain will also develop over parts of the Tennessee Valley/Southeast on Monday that will move eastward to the Southeastern Coast by Monday evening and off the coast overnight Monday. Another front extending from the Northern High Plains to parts of the Great Basin/Northern California will move eastward to the Upper Great Lakes/Central Plains into the Southwest by Tuesday evening. The system will produce snow over parts of the Pacific Northwest into the Northern Rockies and parts of Northern California/Great Basin on Monday. Coastal rain will develop over parts of Northern/Central California also on Monday. As the storm moves inland, the snow levels will lower over the western third of the country. The snow will end over parts of the Pacific Northwest briefly overnight Monday beginning over parts of Washington State by Tuesday afternoon into evening. The snow will continue over parts of the Northern Rockies into parts of the Great Basin through Tuesday evening. Late Monday afternoon, snow moves into the Sierras through Tuesday evening. The snow also moves into some of the coastal mountains of Southern California on Tuesday into Tuesday evening and into the Mogollon Rim by Tuesday evening. Additionally, coastal rain moves into the Central/Southern California Coast Monday afternoon into Tuesday evening. On Monday evening, moisture from the Western Gulf of Mexico begins to move northward over the Southern Plains extending northeastward into the Middle Mississippi Valley. With the aid of upper-level jet dynamics, showers and thunderstorms will develop over parts of the Southern Plains by Tuesday morning expanding northward into parts of the Central Plains and eastward into parts of the Lower Mississippi Valley by Tuesday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php