Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 358 AM EDT Sat Oct 29 2016 Valid 12Z Sat Oct 29 2016 - 12Z 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... The Western states will be in a wet pattern over the next couple of days as a series of fronts move onshore and push inland across the Intermountain West. Rain is expected from California to the Great Basin and east to the Northern/Central Rockies today and will spread into the adjacent Plains as a front develops east of the Rockies this weekend. As the upper-level low moves inland, snow-levels will lower during the overnight hours Saturday and snow will develop over the Sierras. Snow will also develop over the highest elevations of the Northern Rockies through Sunday. With higher than normal moisture this weekend, periods of heavy rainfall may be possible across portions of northern California. Excessive rainfall may increase the risk for flash flooding in these areas. A low pressure system moving through the Upper Midwest and Great Lakes region will drag a cold front through the northern states - resulting in scattered to widespread rain from the Upper Mississippi valley/Great Lakes region to the Northeast. Isolated areas in Upstate New York and Maine may have all snow or mix of rain and snow as the cooler air spills into the region. Much of the Southeast and Gulf states will have high pressure in place into the beginning of the week, which will maintain warmer and drier conditions. Warmer than seasonal average temperatures is forecast for much of the central and portions of the eastern U.S. this weekend. Temperatures will return to near normal across the High Plains as the cold front pushes through. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php