Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 424 AM EDT Tue Oct 09 2018 Valid 12Z Tue Oct 09 2018 - 12Z Thu Oct 11 2018 ...Hurricane Michael is forecast to make landfall along the Florida panhandle producing very heavy rain... ...There is a slight risk of severe thunderstorms from parts of the Middle/Upper Mississippi Valley into the Southern Plains... ...Heavy rain possible over parts of the Upper Great Lakes/Upper Mississippi Valley into parts of the Central Plains... ...Heavy snow possible over parts of the Upper Mississippi Valley and over the higher elevations of the Northern/Central Rockies and Eastern Great Basin... Hurricane Michael is forecast to make landfall along the Florida panhandle on Wednesday afternoon and move northeastward to the Southern Mid-Atlantic by Thursday. Michael will produce very heavy rain, strong wind, and storm surge. Showers and thunderstorms will develop along the Florida panhandle overnight Tuesday and move northeastward into Georgia by Thursday. Please see the latest advisory from the National Hurricane Center for the latest on storm track and intensity. Meanwhile, a front extending from the Upper Great Lakes to the Middle Mississippi Valley then southwestward into the Southern Plains will move slowly eastward to the Upper Mississippi Valley/Upper Great Lakes southward to parts of the Tennessee and Lower Mississippi Valleys by Wednesday evening. Showers and thunderstorms will develop along and ahead of the boundary from parts of the Great Lakes to the Middle Mississippi Valley southwestward into the Southern Plains that will move eastward to parts of the Upper Great Lakes southward to the Lower Mississippi Valley by Wednesday evening. North of the front rain will develop over parts of the Upper Great Lakes/Upper Mississippi Valley through Wednesday evening. Rain will change over to snow over parts of the Upper Mississippi Valley near Canada on Wednesday morning continuing into Wednesday evening. In addition, tropical moisture will steadily increase over the Southern Mid-Atlantic into the Southeast through Wednesday evening into Thursday. Diurnal heating will aid in producing showers and thunderstorms over parts of the Southern Mid-Atlantic into the Southeast through Tuesday evening into Wednesday morning. On Wednesday the showers and thunderstorm will expand into the Ohio/Tennessee Valleys continuing into Thursday. Furthermore, a deep upper-level trough over the Northern High Plains and the Northern/Central Rockies will be reinforced by additional upper-level energy moving southeastward from the Pacific Northwest on Tuesday into Wednesday. The energy will aid in developing lower elevation rain and higher elevation snow over parts of the Northern Rockies into parts of the Northern High Plains that will expand southward into the Central Rockies/Great Basin and parts of the Central High Plains by overnight Tuesday. The rain and snow will begin to wane overnight Wednesday. Weak onshore flow and upper-level energy will also aid in producing rain over parts of the Pacific Northwest that will end overnight Tuesday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php