Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 213 AM EST Sat Nov 30 2024 Valid 12Z Sat Nov 30 2024 - 12Z Mon Dec 02 2024 ...Heavy lake-effect snow downwind from the Great Lakes through Monday... ...Light to moderate snow from the Middle Mississippi Valley to the Central Appalachians on Saturday... ...Light to moderate snow over parts of the Northern Plains/Upper Mississippi Valley and Central Appalachians on Sunday... ...Temperatures will be 15 to 20 degrees below average over parts of the Northern Plains and temperatures will be about 10 degrees below average over parts of the eastern third of the country... High pressure extending from Central Canada to the Tennessee Valley will usher cold air over parts of the Northern Plains, bringing temperatures of 10 to 20 degrees below average. The cold air prompted Cold Weather Advisories to be over parts of North Dakota on Saturday morning. The Central Canada high will move south into the Northern Plains by Monday. As the high pressure expands eastward, cold air will move over most of the eastern third of the country, with temperatures about 10 degrees below average. Freeze Warning will also be over the Central Gulf Coast States to the Southeast. In addition, upper-level troughing over the Upper Midwest/Upper Great Lakes into the Northeast and cold air streaming over the Great Lakes will produce heavy lake-effect snow over the Upper Peninsula of Michigan through Monday. Lighter snowfall will develop over most of the west coast of the Lower Peninsula of Michigan during the time period. However, heavy lake-effect snow will develop over the parts of the northern Lower Peninsula of Michigan near the Traverse City to Gaylord regions. Moreover, heavy lake-effect snow will develop downwind of Lakes Erie and Ontario through Monday. Moreover, a quasi-stationary front extending from the Middle Mississippi Valley to the Northern Rockies/Northern High Plains will remain through Monday. Furthermore, a wave of low pressure will develop on the boundary over parts of the Central Plains and move eastward to the Central Appalachians by Sunday morning. The system will produce light to moderate snow over parts of the Middle Mississippi Valley eastward to the Central Appalachians on Saturday into Sunday morning. The light to moderate snow will continue over the Central Appalachians on Sunday. Additionally, light snow will develop over parts of the Northern Plains on Saturday. The light snow will continue on Sunday and expand into parts of the Upper/Middle Mississippi Valley. Meanwhile, weak return flow off the Gulf of Mexico will create light rain over parts of the Western Gulf Coast on Saturday into Monday morning. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php