Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 344 AM EDT Fri Oct 13 2017 Valid 12Z Fri Oct 13 2017 - 12Z Sun Oct 15 2017 ...Snow expected across the Cascades and northern Rockies... ...Heavy rain possible over parts of Upper Midwest... ...Severe thunderstorms possible over Central Plains and Midwest... A digging upper level trough over the western U.S. will bring unsettled weather throughout the Pacific Northwest and the northern Rockies. Meanwhile, onshore flow will encourage moisture to flow across the region which will promote higher elevation snow throughout the Washington and Oregon Cascades in addition to the northern Rockies. Snowfall will be heavy at times. The trough will slide to the east overnight and will be centered over the Great Basin by Saturday morning. Lingering snow showers could last through Saturday morning in some parts of the northern Rockies. However, the majority of snowfall will come to an end for this region. As the upper level trough shifts toward the Plains, a surface cold front will strengthen as it moves from the Plains to the Mississippi Valley on Saturday. Initially, the front will be stalled across the Plains and Midwest--creating a focus for showers and thunderstorms to develop along the boundary. This region does have a slight risk for severe thunderstorms--with hail and wind damage being the primary risk. The front will push eastward over the Upper Midwest by Saturday evening. Heavy rainfall will develop along the front--creating a risk for flash flooding. By Sunday morning, the front will stretch from the Great Lakes to the southern Plains--with showers and thunderstorms along it. For more information about severe weather, please visit the Storm Prediction Center (www.spc.noaa.gov). As an easterly wave passes over Florida and moves into the Gulf of Mexico overnight, easterly flow will bring deep moisture and instability across the state. Consequently, the eastern and southern portions of Florida can expect showers and thunderstorms throughout the short term period. Reinhart Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php