Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 256 PM EST Mon Feb 15 2016 Valid 00Z Tue Feb 16 2016 - 00Z Thu Feb 18 2016 ...There is a slight risk of severe thunderstorms over parts of the Lower Mississippi Valley and the Central Gulf Coast... ...Heavy snow possible over the Lower Great Lakes and the Northern Appalachians... ...Rain/Freezing rain possible from the Southern Appalachians to the Northeast... Multiple upper-level disturbances over the eastern half of the country will come together form a deep upper-level trough over the eastern third of the country by Tuesday evening into Wednesday. Low pressure over the Lower Mississippi Valley will move northeastward to the Lower Great Lakes by Tuesday afternoon. The system will produce rain/freezing rain over parts of the Southern Mid-Atlantic through late Monday night. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php