Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 308 PM EST Mon Feb 17 2020 Valid 00Z Tue Feb 18 2020 - 00Z Thu Feb 20 2020 ...Snow across parts of the Upper Great Lakes tonight expected to spread into New England on Tuesday... ...Cold conditions expected across much of the country by Wednesday morning... ...Areas where river flooding is occurring in the Deep South will receive additional rain... A low pressure system with multiple fronts is currently organizing over the central Plains. This system is spreading cold rain across the Midwest toward the lower Great Lakes as snow begins to develop over Minnesota. The low is forecast become more consolidated as it moves across the Great Lakes tonight. This will lead to snow to expand across the upper Midwest and into the upper Great Lakes tonight into Tuesday morning. Meanwhile, the system will continue to ingest moisture from the Gulf of Mexico and bring an increasing chance of rain expanding across the Deep South into the southeastern U.S. through Tuesday. Father north, snow is expected to overspread northern New England on Tuesday as mixed precipitation moves into central new England. By Tuesday night, much of the Mid-Atlantic should see rain as a cold front passes through the region. A large dome of cold air from Canada will gradually overspread much of the Great Plains into the Great Lakes behind the low pressure system on Tuesday. The cold air will then continue eastward through much of the eastern U.S. on Wednesday. Below normal temperatures will be common across the eastern two-thirds of the country by Wednesday morning. The coldest locations will be over the northern Plains where temperatures are forecast to be more than 20 degrees below normal. Meanwhile, scattered snow showers are continuing across the northern and central Rockies as well as the nearby High Plains. As a high pressure system associated with the cold air mass pushes southward, the chance of snow is expected to increase over Colorado on Wednesday due to the increase of upslope flow from the northeast across the region. Meanwhile, rain and scattered thunderstorms will be slow to move out of the Gulf Coast into the Southeast U.S. coast behind a cold front. More rain is expected for Texas on Wednesday as the next upper-level system arrives. Florida will remain very warm through Wednesday with high temperatures reaching the low to mid 80s. Kong Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php