Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 345 AM EDT Sun Jun 11 2017 Valid 12Z Sun Jun 11 2017 - 12Z Tue Jun 13 2017 ...Severe thunderstorms and heavy rain possible possible over parts of the Upper Great Lakes and Great Lakes... ...Temperatures will be 10 to 25 degrees below average over parts of the Great Basin/Pacific Northwest/California... ...Snow possible at highest elevations of the Cascades/Sierras/Great Basin... Scattered to numerous showers and thunderstorms will develop across the Northern Plains, Upper Midwest and the Upper Great Lakes over the next few days. Warm, moist air is forecast to stream northward over a nearly stationary front. Conditions will be favorable for strong to severe thunderstorms to develop and produce periods of heavy rainfall. The highest 3-day totals of 5.5+ inches is centered over northern Wisconsin. SPC has highlighted much of the Upper Mississippi Valley as a having slight to enhanced risk for severe weather. Across the Southeast and the Gulf Coast showers and a few thunderstorms will focus along a dying boundary. Moisture from the Gulf of Mexico will move northward over parts of the Lower Mississippi Valley and the Central/Eastern Gulf Coast through Monday. In addition, upper-level impulses will move over the area, too. The moisture,upper-level energy, and diurnal heating will produce showers and thunderstorms over parts of the Lower Mississippi Valley to the Southeast through Monday. An upper-level trough will dig southeast through the West as a steady stream of Pacific moisture moves inland. This system will usher in rain over parts of the Pacific Northwest/Northern California and east into parts of the Northern Rockies... with snow possible over the Cascades and likely at the higher elevations of the northern Great basin and Northern Rockies. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php