Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 356 PM EDT Sat Oct 01 2016 Valid 00Z Sun Oct 02 2016 - 00Z Tue Oct 04 2016 ...Heavy rain possible over parts of the Northern Rockies/High Plain... ...Heavy rain possible over parts of the Pacific Northwest Coast... ...Temperatures will become 10 to 20 degrees below average over parts of California into the Great Basin and the Northern Rockies... A deep upper-level low over the Great Lakes/Ohio Valley will slowly begin to weaken and move eastward to the Northern Appalachians by Monday. The system will produce rain and thunderstorms over parts of the Great Lakes/Ohio and Tennessee Valleys into the Northeast/Mid-Atlantic that will slowly wane to a much smaller area over the Lower Great Lakes/Northern New England by Monday. In addition, showers and thunderstorms will develop over parts of the Southern Mid-Atlantic into the Southeast Coast through Monday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php