Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 335 AM EDT Fri Jul 12 2013 Valid 12Z Fri Jul 12 2013 - 12Z Sun Jul 14 2013 ...There is a slight risk of severe thunderstorms over parts of the Northern Plains/Upper Mississippi Valley... ...Heavy rain possible over parts of the Upper Mississippi Valley... ...Heavy rain over parts of the Southeastern Coast... Upper-level low over the Central Appalachians will move roughly westward to the Middle Mississippi Valley by Saturday evening. The energy will trigger showers and thunderstorms over parts of the Mid-Atlantic to the New England Coast and the Southeast/Eastern Gulf Coast through Saturday. Meanwhile, a quasi-stationary front over the Northern Plains/Upper Mississippi Valley extending westward to the Northern Intermountain Region will be the focus of showers and thunderstorms over the Northern Plains/Upper Mississippi Valley through Saturday. In addition, monsoonal moisture and diurnal heating will produce showers and thunderstorms over parts of the Central/Southern Rockies and parts of the Southwest/Great Basin on Friday, becoming much reduced on Saturday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php