Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 357 AM EDT Sat Oct 06 2018 Valid 12Z Sat Oct 06 2018 - 12Z Mon Oct 08 2018 ...Heavy rain possible from parts of the Southern Plains northeastward to the Middle Mississippi Valley... ...Heavy snow possible at the highest elevations of the Northern/Central Rockies... ...Temperatures will be 10 to 20 degrees below average from the Plains westward into the Northern Rockies/Great Basin... A front will become quasi-stationary from parts of the Southern Plains to parts of the Middle Mississippi/Western Ohio Valleys through Monday. The eastern parts of the front will move from the Great Lakes to off the Northeast Coast by Monday. Showers and thunderstorms will develop along and near the boundary from the Great Lakes to the Southern Plains. Likewise, the showers and thunderstorms along the eastern end of the front will move eastward into parts of the Northeast by Saturday evening, continuing over Northeast through Monday. Showers and thunderstorms will continue over the Southern Plains to parts of the Middle Mississippi/Western Ohio Valleys through Monday. Diurnally driven showers and thunderstorms will develop over parts of the Tennessee Valley to parts of the Southern Mid-Atlantic through Sunday evening. Additionally, tropical moisture streaming over Florida and the Western/Central Gulf Coast will trigger showers and thunderstorms over the region through Monday. Meanwhile, upper-level energy over the western third of the country will form an upper-level low over California and the the Great Basin/Southwest by Sunday morning that will slowly move southward to the U. S./Mexican border by Sunday evening. The energy will aid in developing higher elevation snow and lower elevation rain over parts of the Northern/Central Rockies through Monday. Heavy snow is possible at the highest elevations. Rain and snow will move into parts of the Northern High Plains on Sunday morning into Sunday evening. Rain will also develop over parts of the Pacific Northwest/Northern California and parts of the Great Basin that will move southeastward to the Southwest/Central Rockies by Sunday morning. The rain will end over parts of the Pacific Northwest and California by Sunday morning, too. Additionally, a warm front move near the Pacific Northwest on Sunday will produce rain over parts of the Pacific Northwest Coast on Sunday afternoon into Monday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php