Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 350 AM EDT Fri Oct 26 2018 Valid 12Z Fri Oct 26 2018 - 12Z Sun Oct 28 2018 ...Developing coastal low to bring widespread precipitation to the Eastern U.S.... ...Heavy rainfall possible for the Pacific Northwest... A developing area of low pressure along the Gulf Coast will track up the East coast on Friday and Saturday. Heavy rainfall will accompany this low spreading from the Ohio Valley and Southeast, northward into the Mid-Atlantic and eventually New England by Saturday. Rain is expected to be the predominant precipitation type with this storm, but mixed precipitation across upstate New York to northern New England with accumulating snow and ice is possible, especially in the higher terrain. Rain may also change over to snow or a rain/snow mix farther south into portions of the Central Appalachians as cold air deepens on the backside of the storm. In addition to the heavy rain, gusty winds, coastal flooding, and isolated severe thunderstorms in the coastal Carolinas will also be a concern as this storm moves through. The Upper Midwest and Great Lakes region will continue to see periods of rain as a nearly stationary frontal boundary remains draped across the upper Lakes region on Friday, and a low pressure system moves in from the west on Saturday. Out West, a series of frontal systems will allow for precipitation in the Pacific Northwest, with heavier amounts possible particularly along the favored higher terrain. Temperature wise, the quick moving low pressure system in the East will keep temperatures cool for this time of the year, with afternoon highs as much as 10 to 20 degrees below normal possible. Much of the Western U.S. will remain warm and dry, which will continue to elevate fire weather concerns across Southern California. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php