Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 335 AM EST Fri Nov 27 2015 Valid 12Z Fri Nov 27 2015 - 12Z Sun Nov 29 2015 ...Flash flooding possible across portions of the southern plains and mid-Mississippi valley... ...Snow, sleet, and freezing rain expected for much of the central U.S... An arctic airmass will settle over the much of the northern tier and central portions of the US as a cold front surges through the Central and Southern Plains. Warm, moist air will flow over this system from the Gulf of Mexico which will result in widespread precipitation along and north of the cold front. Showers and thunderstorms are forecast from the Southern Plains to the Middle Mississippi Valley where amounts of 3 to 10 inches, with locally higher amounts possible, are forecast through Monday morning. Flash flooding will be possible along this corridor through the weekend. A mix of snow, sleet, and freezing rain is expected along the Southern and Central Rockies and east across the Southern/Central Plains to southern Iowa. Significant ice accumulations of a quarter to a half inch, with locally higher amounts, are forecast across portions of this area. Additionally, 1 to 3 inches of snow or sleet will be possible. In the higher terrain of Colorado, snow is forecast to fall, with 5 to 10 inches of snow forecast to be common. Winter storm watches and warnings, ice storm warnings, freezing rain advisories and winter weather advisories are in effect for much of the central U.S. Please refer to products from local NWS forecast offices for details specific to your area. The northern section of the cold front will pass through the Great Lakes and Ohio Valley region today, continuing through the Northeast and Mid-Atlantic states this weekend. Showers will accompany the front and linger after the frontal passage. Most areas from the Mid-Atlantic to northern Maine could see 0.50 to 1 inch by Monday morning. High pressure rooted over the Southeast will slow the cold front's progression this weekend and will greatly limit precipitation development for this area. However, shower and thunderstorm activity will be possible offshore from the Florida keys to the Outer Banks of North Carolina. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php