Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 1206 PM EST Wed Nov 27 2024 Valid 00Z Thu Nov 28 2024 - 00Z Sat Nov 30 2024 ...Pre Thanksgiving to Thanksgiving Day storm to push from the Mid Mississippi/Ohio Valley today into the Northeast on Thursday spreading rainfall and New England snowfall in its vicinity... ...Increasingly below average temperatures spill out into the Great Plains and Mississippi Valley through the end of the week... ...Lake Effect snows continue and will expand and intensify with time... A dynamic mid-latitude cyclone tracks through the Mississippi Valley, Tennessee Valley, Upper Ohio Valley, and near the New England coast through Thanksgiving day. Scattered showers and thunderstorms spread into the East Coast tonight and progressively shift eastward. A swath of moderate to heavy snowfall is likely to develop across portions of the interior Northeast -- winter storm watches are in effect for portions of central New England related to the heavy snow threat. Elsewhere, Lake Effect snow showers across the Upper Great Lakes may yield anywhere from 4-8 inches over the northern coastline of the Upper Peninsula of Michigan as well as northern parts of the Lower Peninsula. A disturbance aloft will allow for the development of a new cold front late on Thanksgiving which moves east and south ahead of a strong and cold surface high. In the wake of this front, as temperatures cool further, lake effect snows should expand and intensify as they interact with record warm Great Lakes temperatures for so late November. Florida will remain mild to warm. Roth Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php