Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 256 PM EST Tue Feb 25 2020 Valid 00Z Wed Feb 26 2020 - 00Z Fri Feb 28 2020 ...Heavy snow for the Great Lakes and Northern New England... ...Very heavy lake effect snow event to develop downwind from the Great Lakes... ...Temperatures will be 10 to 20 degrees below average from the Central/Southern Rockies to the Upper Midwest to parts of the Ohio/Tennessee Valleys and Lower Mississippi Valley... Low pressure over the Ohio Valley will deepen rapidly while moving eastward to the Central Appalachians by Wednesday morning then moves northward into Southeastern Canada by Thursday evening. The storm will produce scattered light snow over parts of the Upper Midwest and Ohio Valley with snow expected to develop from Northeast Missouri to Southern Michigan as the surface low intensifies and a shortwave impulse arrives from the Central Plains. The greatest snowfall totals are currently expected across southeast Michigan where six inches or greater of accumulation will be possible, and lighter amounts extending towards the southwest across Central/Northern Illinois and northeast Missouri. Moderate snow along Northern New York and Northern New England by Wednesday, and rain near the Interstate 95 corridor. In terms of rainfall potential, the majority of the heaviest rainfall will develop along the associated front over Florida. Multiple rounds of light rain are expected across the Northern Mid-Atlantic region as the surface low approaches, with over an inch expected across parts of Pennsylvania. A much cooler airmass will settle in behind the cold front across the East Coast region by Thursday, signaling a cold end to February. Elsewhere across the continental U.S., dry conditions are forecast from the Intermountain West to Texas, and also across the Upper Midwest where below normal temperatures are expected. Light snow is likely across portions of the Central and Northern High Plains, and also for portions of the Northern Rockies and the Cascades. In addition, a major lake effect snow event will develop downwind from the Great Lakes on Thursday where accumulations of over one foot are possible. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php