Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 319 PM EST Wed Nov 18 2015 Valid 00Z Thu Nov 19 2015 - 00Z Sat Nov 21 2015 ...Severe thunderstorms possible across portions of the Gulf Coast through Thursday morning... ...Heavy rain possible across portions of the southern Appalachians and Southeast... ...Snow expected across the Intermountain West and Plains... The strong cold front that brought heavy rains to the lower Mississippi Valley and the severe weather to the southern Plains continues its trek eastward toward the Mid-Atlantic and Southeast. The heaviest axis of rainfall will occur along the front in the Southeast and southern Appalachians tonight and into Thursday morning. Flash flooding is a concern, and the WPC has issued a slight risk for excessive rainfall through Thursday morning. See the excessive rainfall page for more information. Severe weather will also still be possible overnight across portions of the Florida Panhandle, Alabama and western Georgia per the SPC Day 1 Convective Outlook. As the cold front approaches the East Coast on Thursday evening, rainfall increases along the coastline and will quickly taper off as the front move over the Atlantic Ocean. However, New England will continue to see showers through Friday as the northern portion of the front moves northeastward across the region. In addition, once the cold front pushes southward across Florida, the front will slow and eventually stall south of the Florida Keys. This will provide a focus for continuous rounds of showers and thunderstorms for the southern half of Florida through Friday. A wave of low pressure coming from the Pacific Ocean will move across the Pacific Northwest on Thursday morning. This area will see an increase of precipitation overnight and into Thursday morning. Showers and higher elevation snow will push south and east into the Pacific Northwest and the Intermountain West in conjunction with the movement of the wave of low pressure. As the upper level low begins to amplify on Thursday and into Friday, it will also help push a frontal system as it moves across the Plains. Snow can be expected north and west of the primary surface low associated with this front -- which will move across the Plains and approach the Upper Midwest on Friday evening . Fanning Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php