Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 351 AM EDT Sat Aug 05 2017 Valid 12Z Sat Aug 05 2017 - 12Z Mon Aug 07 2017 ...Strong cold front continues to sweep across the eastern U.S... ...Showers and thunderstorms to persist along the Gulf Coast... ...Heavy rainfall and severe weather possible in the Plains and Mississippi Valley... A strong cold front will continue to push through the Mid-Atlantic and Northeast states this morning before pushing offshore by late afternoon/early evening. Showers and thunderstorms will develop along and east of the front spreading up to an 1+ inches over the Northeast. The frontal boundary will stall over the Carolinas and northern Georgia through Sunday morning before lifting as a warm front Sunday afternoon through Monday morning. Showers and thunderstorms along this boundary will result in 1 to 1.50 inches with up to 2.5 inches possible for the Southern Appalachians. Unseasonably cool temperatures are forecast for much of the central U.S. and the East Coast in the wake of the cold front this weekend. A boundary near the Gulf Coast will continue to act as a focus for convection over the next few days. Strong southerly flow will transport a deep layer of moisture from the Gulf of Mexico over this boundary, creating an environment conducive for heavy rainfall - especially along the central portions of the Gulf Coast. Areal averages over the next 3 days will be 1 to 2 inches, however local amounts may be higher. The regions with the highest possibility of having severe thunderstorms and heavy rainfall will be the Southern/Central Plains and Mid Mississippi valley. A frontal system is forecast to drop southward from the central Rockies today and in the Central/Southern High Plains through early Monday. Areal averages of 1 to 3 inches will be common, with 4 to 5+ inches likely for western Missouri, northwest Arkansas and eastern Oklahoma. Slight and moderate risks for excessive rainfall are in effect. Flash flooding conditions will likely occur over prone areas. This particular region has also been highlighted by SPC as having a slight risk for severe thunderstorms - please refer to their convective outlooks for addition information on the severe weather threat. Showers and thunderstorms will continue to be possible over portions of the Desert Southwest and Southern/Central Rockies due to the influx of monsoonal moisture along with daytime heating. The areal coverage will increase during the afternoon and evening hours. These storms are capable of producing isolated heavy downpours that could lead to flooding. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php