Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 257 PM EST Thu Nov 17 2016 Valid 00Z Fri Nov 18 2016 - 00Z Sun Nov 20 2016 ...Heavy snow possible from the Upper Mississippi Valley to parts of the Central Plains... ...Temperatures will be 10 to 25 degrees above average from the Great Lakes to the Lower Mississippi Valley and the Appalachians... ...Heavy rain over parts of Northern California... A storm over the Central Plains will move into Central Ontario by Saturday. Ahead of the associated front temperatures will be well above average for this time of year, while temperatures will become more seasonable behind the boundary. Snow will develop over parts of the Northern Plains and Central High Plains into the Northern/Central Rockies that will expand into parts of the Upper Mississippi Valley overnight Thursday and ending over the Northern/Central Rockies and High Plains by Friday morning. The snow will move out of the Northern/Central Plains by Friday evening while moving into the Upper Great Lakes/Middle Mississippi Valley Friday morning. Overnight Friday, the snow will move into parts of the Western Ohio Valley. In addition, rain will develop over parts of the Central Plains that will change over to snow by Friday afternoon. Furthermore, showers and thunderstorms will develop over parts of the Southern Plains by Friday morning. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php