Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 353 AM EST Fri Feb 28 2014 Valid 12Z Fri Feb 28 2014 - 12Z Sun Mar 02 2014 ...Heavy rain possible over parts of Southern California... ...Temperatures will be 20 to 40 degrees below average over parts of the Upper Midwest... ...Temperatures will be 20 to near 30 degrees below average over part of the Mid-Atlantic into the Lower Great Lakes/Southern New England... A deep closed upper-level low over the Eastern Pacific will move inland over California by Saturday evening. The system will stream moisture from the Pacific into California producing moderate to heavy rain over parts of Southern/Central California on Friday waning to light rain by Saturday evening. In addition, moderate snow will develop over parts of the Sierras also on Friday. Rain will also move into the Southwest by Friday evening and into parts of the Southern Rockies by Saturday evening. Meanwhile, a front extending from the Northern Plains to parts of the Northern High Plains will move Southeastward to the Lower Great Lakes to the Southern plains by Saturday. An area of snow will develop over parts of the Upper Great Lakes to the Middle Mississippi Valley, on Friday afternoon, moving to the Lower Great Lakes/Northeast by Saturday evening. Moisture from the Gulf of Mexico will move northward over parts of the Southern Plains/Lower Mississippi Valley producing rain with embedded thunderstorms on Friday. The moisture from the Gulf of Mexico will continue to move northward over the Plains/Mississippi Valley on Saturday overrunning the front producing snow from the Central Plains eastward to parts of the Ohio Valley/Great Lakes by Saturday evening. Also, an area of sleet/freezing rain will develop over parts of the Middle Mississippi Valley on Saturday evening. Elsewhere, Cold high pressure over Western Canada will aid in producing upslope flow over the Northern/Central Rockies through Saturday evening that will develop snow over the area through Saturday night. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php