Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 409 PM EDT Fri Oct 28 2016 Valid 00Z Sat Oct 29 2016 - 00Z Mon Oct 31 2016 ...Heavy rain possible over parts of Northern and Central California... ...Snow possible for parts of the Sierras and Northern Rockies... ...Temperatures will be 10 to 20 degrees above average from the Central/Southern High Plains to the Ohio/Tennessee Valleys... Low pressure over parts of the Upper Great Lakes will move eastward to the Canadian Maritimes by Sunday. The system will produce rain over parts of the Upper Great Lakes through Saturday morning. Rain will develop over parts of the Northern Appalachians overnight Friday will expand into Northern New England and the Lower Great Lakes by Saturday afternoon/evening and continue into Sunday. In addition, a wave of low pressure will develop over the Central High Plains Friday night and advance eastward to the Western Ohio Valley by Sunday. Showers and thunderstorms will develop over parts of the Northern High Plains on Friday night that will move eastward to the Great Lakes/Ohio Valley by Sunday. Meanwhile, upper-level energy over the Great Basin will move eastward to the Middle Mississippi Valley by late Saturday night. The energy will produce rain from California to the Great Basin and the Northern/Central Rockies will move to the Northern/Central Rockies and Northern/Central High Plains by Saturday morning. Additionally, a deep upper-level low over the Eastern Pacific will begin to move inland overnight Friday into Sunday. The storm will produce rain over the Pacific Northwest into Northern California late Friday night into Saturday. The rain will expand into parts of the Northern Rockies Saturday night into Sunday. As the upper-level low moves inland, snow-levels drop overnight Saturday and snow will develop over the Sierras. Snow will also develop over the highest elevations of the Norther Rockies Friday into Sunday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php