Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 352 PM EST Sun Nov 24 2013 Valid 00Z Mon Nov 25 2013 - 00Z Wed Nov 27 2013 ...Sleet and freezing rain to continue for parts of the Southern Plains through early Monday morning... ...Temperatures will warm this week over the Southern Plains and East Coast after a cold start... ...Widespread moderate to locally heavy rain expected from the Gulf Coast toward the Mid-Atlantic states... An arctic airmass in place from the Southern Plains to the Southeast, and northward through the Ohio Valley and New England, should continue to promote wintry weather for portions of the Southern Plains tonight. While a batch of snow, sleet and freezing rain has been pushing off toward the east and weakening over eastern Oklahoma this afternoon, a renewed surge of precipitation is expected to develop tonight over southwestern Texas as an anomalous upper disturbance approaches from New Mexico. Additional sleet and ice accumulations are expected to be in the light to moderate range for northern Texas into southeastern Oklahoma and west-central Arkansas, but any frozen precipitation should be coming to an end by Monday afternoon as cold air begins to retreat, leading to rain as the dominant precipitation type. The storm will track eastward along the Gulf Coast region Monday night into Tuesday with deep moisture advecting northward into the Deep South and Southeast with locally heavy rain and even thunderstorms for locations closer to the Gulf. A surface low connected to the disturbance aloft will begin to strengthen on Tuesday near the Gulf Coast with low level winds increasing out ahead of it, allowing warmer and more moist conditions to move into the region in the wake of a lifting warm front. While likely starting off as freezing rain for the eastern slopes of the central and southern Appalachians Tuesday morning, precipitation will changeover to rain by mid-day for the region with locally heavy rain possibly leading to flooding concerns for portions of the Deep South and Mid-Atlantic. Meanwhile, cold air will still be present in parts of the upper Ohio Valley and northern Appalachians which should cause the precipitation to start off as snow by later in the day on Tuesday. Light accumulations will be possible by sundown Tuesday for these locations. Out across the western U.S., upper level ridging will dominate the upper level pattern, leading to a pleasant start to the week with temperatures near or slightly above average under mostly sunny skies. Otto Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php