Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 301 AM EST Fri Feb 17 2023 Valid 12Z Fri Feb 17 2023 - 12Z Sun Feb 19 2023 ...A stripe of snow, sleet, and freezing rain to stretch from the Great Lakes to northern New England into Friday... ...Severe thunderstorms and flash flooding possible through early Friday morning from the Ohio/Tennessee valleys to the central Gulf Coast... A myriad of precipitation types will accompany a winter storm system as it continues its trek across the eastern third of the U.S. On the northern periphery of the precipitation shield, moderate to locally heavy snowfall is expected to exit the Great Lakes and spread into the Northeast. Maximum snowfall totals could add up a foot for parts of northern Maine today. There may also be a narrow transition zone where the temperatures will waffle near freezing, resulting in sleet or freezing rain from northern Indiana, southern Michigan, the Great Lakes and northern New England. The wintry mix will decrease through the weekend as the system pulls offshore. Showers and thunderstorms are expected ahead of the approaching cold front across the Southeast and points northward. Some of these storms have had the potential of turning severe overnight and that possibility for severe storms and flash flooding continues this morning through the eastern Ohio/Tennessee Valley and nearby southern Appalachians. The showers and thunderstorms should consolidate into a more linear segment along the cold front by Friday, while also picking up speed and exiting the East Coast by Friday afternoon. This should limit the risk of any additional severe weather for flash flooding concerns to end the week. This cold front will also usher in much colder temperatures compared to current readings, closer to the climatological averages for mid-February. High pressure building over the Central and the Southeast portions of the country will lead to mostly calm and mild conditions by the weekend. Meanwhile, several inches of fresh snowfall will possible across the higher terrain of the Northern Rockies. Campbell Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php