Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 252 AM EST Fri Mar 01 2019 Valid 12Z Fri Mar 01 2019 - 12Z Sun Mar 03 2019 ...Light to moderate snow will push through the Mid-Atlantic and Southern New England... ...Temperatures will be 20 to 30 degrees below average over the Northern High Plains... ...Heavy snow possible over the Central Rockies... A wave of low pressure over the Southeast will move northeastward out over the Western Atlantic yet close enough to impact New England through Sunday. The storm will produce rain over the Southern Mid-Atlantic southward to the Central/Eastern Gulf Coast and snow over the Northern Mid-Atlantic on Friday morning. The snow will expand into the Northeast and slowly taper off over the Northeast on Sunday morning. The rain over the Southeastern U. S. will move eastward of the coast by Saturday morning. Meanwhile, upper-level energy over the Northern High Plains will move quickly move eastward to the Great Lakes by Saturday morning then eastward across the Northeast by Sunday. The energy will produce snow over the Northern Plains and Northern/Central Rockies that will move eastward into the Upper Mississippi Valley/Upper Great Lakes by Friday evening. The snow will continue to move eastward across parts of the Northeast on Saturday evening into Sunday. In addition, an upper-level low just off the Northwest Coast will move inland and slowly weaken by Saturday morning over the Central High Plains. The upper-level low will produce coastal rain and higher elevation snow over parts of the Pacific Northwest with the rain ending overnight Friday as the snow moves into the Northern/Central Rockies on Saturday. A second area of energy off the West Coast will move eastward moving onshore over California on Saturday morning continuing to move inland to the Panhandle of Texas by Sunday. This bundle of energy will produce rain and higher elevation snow over California overnight Friday. Rain will move into the lower elevations of the Southwest and Great Basin while snow expands into the Great Basin and into the Central Rockies by Saturday evening. The rain and higher elevation snow will begin to taper off over California on Sunday. As the energy moves farther inland, moisture from the Western Gulf of Mexico will move northward over the Western Gulf Coast on Friday evening. On Saturday, the moisture will extend farther inland into parts of the Southern Plains/Lower Mississippi Valley. Showers and thunderstorms will develop over parts of the Southern Plains/Western Gulf Coast. Overnight Saturday, snow will expand onto the Central/Southern Plains into parts of the Middle Mississippi Valley as the showers and thunderstorms move into the Lower Mississippi Valley. By Sunday morning, rain and snow will move into parts of the Ohio/Tennessee Valleys. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php