Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 424 AM EDT Mon Oct 10 2016 Valid 12Z Mon Oct 10 2016 - 12Z Wed Oct 12 2016 ...Temperatures will be 10 to 20 degrees below average over parts of the Northern High Plains... ...Snow is possible over parts of the Northern Rockies and Northern High Plains... Post-Tropical Cyclone Matthew is well off the Northeast Coast and will move northeastward to just off the Canadian Maritimes by Monday evening. Rain associated with the system over the Northeast Coast will come to an end by Monday afternoon into Monday evening. Meanwhile, a front extending from the Northern Plains roughly westward to the Northern Rockies/Pacific Northwest will move eastward to the Upper Great Lakes/Middle Mississippi Valley to the Central Plains and southward to the Great Basin/Central High Plains by Tuesday evening. The system will produce rain over parts of the Pacific Northwest to the Northern Intermountain Region through Tuesday afternoon. In addition, snow will develop over parts of the Northern Rockies/Northern High Plains through Tuesday evening. Rain will also develop over parts of the Northern Plains on Monday afternoon into evening continuing into Tuesday evening. Showers and thunderstorms develop over parts of the Central Rockies/Eastern Great Basin by Monday evening continuing through to Tuesday evening. Showers and thunderstorms will also develop over parts of the Upper/Middle Mississippi Valley overnight Monday that will expand into parts of the Upper Great Lakes by Tuesday evening. Additionally, upper-level energy over the Central Plains will move northeastward to the Great Lakes/Ontario by Tuesday evening. The energy will aid in producing showers and thunderstorms over parts of the Central Plains/Southern High Plains on Monday morning moving into parts of the Middle Mississippi Valley/Great Lakes by Tuesday morning. Furthermore, flow off the Western Gulf of Mexico and off the Atlantic will aid in producing showers and thunderstorms over parts of the Western Gulf Coast and the East Coast of Florida on Tuesday afternoon into Tuesday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php