Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 310 AM EST Wed Nov 27 2024 Valid 12Z Wed Nov 27 2024 - 12Z Fri Nov 29 2024 ...Pre Thanksgiving to Thanksgiving Day storm to push from the Mid Mississippi/Ohio Valley today into the Northeast on Thursday... ...Dry conditions on tap for the West Coast after several days of wet weather... ...Much above average temperatures from the Southern Plains into the Gulf Coast today, while much below average temperatures spill out into the Great Plains and Mississippi Valley through the end of the week... A low pressure system responsible for heavy snowfall over the Colorado Rockies (ending this morning) will intensify into a dynamic mid-latitude cyclone, tracking through the Midwest and into the Northeast Coast through Thanksgiving day. Scattered showers and thunderstorms will develop across the Mid/Lower Mississippi Valley and Ohio/Tennessee Valleys this afternoon before spreading into the East Coast tonight and progressively shifting eastward through Thanksgiving day. A swath of light to moderate snowfall is likely to develop across portions of the interior Northeast, with the Northern Appalachians forecast to receive 4-8 inches of snow by Friday morning. Elsewhere, 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 dry spell ensues across the West as an upper ridge slowly settles over the region. Shortwave energy will phase with a northern stream trough and amplify across the eastern half of the country in the coming days. This development will allow for a cool continental airmass to spill out across the Great Plains and Mississippi Valley through Thanksgiving day before a reinforcing arctic airmass plunges temperatures even more through this holiday weekend. Prior to that, today will be the last day of much above average temperatures throughout the South. Much of Texas will experience high temperatures between 15-25 degrees above average. Kebede Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php