Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 326 PM EDT Tue Oct 01 2013 Valid 00Z Wed Oct 02 2013 - 00Z Fri Oct 04 2013 ...Snow to pick up over the Northern Rockies... ...Temperatures will be 10 to near 20 degrees above average over parts of the Middle/Lower Missouri Valley... A front extending from the Great Lakes southwestward to the Central Plains and westward to the Great Basin will move eastward to off the Northeast Coast, while the western part of the boundary remains quasi-stationary by Thursday. Light rain will develop ahead of the front over parts of the Northern Appalachians on Wednesday morning. Energy moving over the Northwest to the Northern Plains will trigger scattered rain and highest elevation snow over parts of the Pacific Northwest eastward to the Northern Rockies also through to Wednesday morning. Scattered rain will develop over parts of the Northern/Northern High Plains on Wednesday morning. Moisture from the Gulf of Mexico will move northward over the Mississippi Valley intersecting the front as the upper-level energy intensifies on Wednesday. Showers and thunderstorms will begin to develop along the boundary over parts of the Upper Midwest on Wednesday afternoon that will expand eastward into the Great Lakes/Ohio Valley by Thursday. Rain over the Pacific Northwest will end overnight Wednesday. Additionally as the upper-level trough intensifies, an area of moderate snow will develop over parts of the Northern Rockies by Thursday morning. Areas of light to moderate rain and a large patch of rain will develop over the lower elevations of the Northern/Northern High Plains on Thursday. Meanwhile, upper-level energy over the Central Gulf Coast will interact with the moisture moving northward from the Gulf of Mexico producing showers and thunderstorms over parts of the Central Gulf Coat/Lower Mississippi Valley that will expand northward into the Middle Mississippi Valley Wednesday afternoon into Thursday morning. In addition, easterly flow off the Atlantic will produce showers and thunderstorms over the southern tip of Florida. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php