Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 338 PM EDT Wed Oct 10 2018 Valid 00Z Thu Oct 11 2018 - 00Z Sat Oct 13 2018 ...Life-threatening wind, rain, and flash flooding ongoing as Hurricane Michael moves inland over the Southeast... ...Heavy rainfall possible along a cold front from the Ohio Valley to the Mid-Atlantic/Northeast tonight and on Thursday... ...Rainfall associated with Tropical Storm Sergio may begin impacting portions of Arizona and New Mexico by Friday... Dangerous and major Hurricane Michael made landfall earlier this afternoon along the Florida Panhandle and will continue to move northeastward through Georgia and the Carolinas on Thursday, and off the Mid-Atlantic coast by Friday. Life-threatening hurricane force winds, heavy rainfall, and coastal storm surge are ongoing. As much as 4 to 8 inches of rain, with locally higher amounts, is expected associated with Michael from the Florida Panhandle to southeast Virginia. This could produce life-threatening flash flooding and WPC has highlighted this entire region within a moderate risk on the latest excessive rainfall graphics. In addition, and as is typical with tropical systems, the tornado threat will continue with the Storm Prediction Center having parts of the southeast and eastern Carolinas within a slight to enhanced risk for severe storms. Please refer to the National Hurricane Center for the latest information on the track and intensity of Michael. Meanwhile, a strong cold front will push eastward across the Ohio Valley tonight with moderate to locally heavy rainfall continuing along the boundary. This front will move into the Mid-Atlantic states by Thursday and, likely with partial influence from the moisture of Hurricane Michael, heavy rainfall will be possible along the front from the Mid-Atlantic, into the Northeast. This front will be fairly quick moving which should limit the flash flood threat to marginal to slight at best. To the north and west of the low pressure center, accumulating snowfall will be possible tonight across northern Minnesota and eastern North Dakota. Behind this cold front, cold arctic air is already filtering into the Central U.S. and temperatures across the Plains and into the Mississippi Valley could be as much as 10 to 20 degrees below normal through Friday. Freeze watches and warnings, and frost advisories, are in effect across portions of the Central Plains. Broad troughing over the Western U.S. will allow for lower elevation rain and mountain snows across portions of the Great Basin and Rockies on Thursday. By Friday, organized rainfall may begin moving into portions of Arizona and New Mexico associated with Tropical Storm Sergio. Refer to the NHC for the latest on Sergio. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php