Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 257 AM EST Fri Jan 20 2017 Valid 12Z Fri Jan 20 2017 - 12Z Sun Jan 22 2017 ...Severe thunderstorms possible for portions of the Gulf Coast states... ...Heavy snow possible for the California mountains as well as the Mogollon Rim and portions of the central and southern Rockies... Strong to severe thunderstorms will be possible across much of the South this weekend as a warm front and an upper-level disturbance from portions of the Gulf Coast and Southeast to the Ohio valley and portions of the Great Lakes. The Storm Prediction Center has highlighted much of the Lower Mississippi valley has having slight to enhanced risks for severe storms on through Saturday. The these threats will shift eastward to the eastern Gulf states and southern Mid-Atlantic region on Sunday. Please refer to products issued by the Storm Prediction Center for further details on the severe weather threat. Much of the western states will remain in an active wet pattern through the weekend as a Pacific frontal system moves inland. Widespread rain and mountain snow will spread from coastal areas to the Interior West, Great Basin and along the Rockies. Heavy snow will be possible through Saturday morning for the mountains in California and from the Mogollon Rim to the central and southern Rockies. The intensity of the precipitation will steadily increase late Saturday afternoon into the evening hours across California and the Pacific Northwest coastal areas as another frontal system approaches. Excessive rainfall will be possible across portions of California; where forecast 3-day totals may range from 3 to 8 inches primarily along the coast and the mountains, with isolated amounts near 10 inches in the Sierras. Cambpell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php