Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 317 AM EST Mon Feb 15 2016 Valid 12Z Mon Feb 15 2016 - 12Z Wed Feb 17 2016 ...Snow...ice...and heavy rain expected with a complex storm system tracking from the Tennessee Valley to the Eastern U.S. on Monday... Precipitation over the Tennessee Valley and Mid-Atlantic region will intensify and become more widespread as a wave of low pressure over the Lower Mississippi Valley deepens while tracking towards the Appalachians on Monday. Within the northern edge of the precipitation shield...several locations will see snow transitioning to sleet or freezing rain...before eventually changing over to all rain as increasing amounts of warm moist air overrun a retreating Arctic airmass. The deepening surface low will continue to track northeastward along the Appalachians...allowing for the messy wintry mix of precipitation to spread into the Northeast Monday night into Tuesday. The highest snowfall totals should be just to the north and west of the low track...mainly across northwestern Pennsylvania and western New York. Ice accumulations will be possible for a large portion of the Mid-Atlantic and New England states...while heavy rain will be the dominant threat for locations closer to the coast. Elsewhere across the Nation...a swath of light to moderate snow will be possible with a clipper system streaking from the Northern Plains to the Ohio Valley Monday night into Tuesday. Conditions will stay mostly dry and mild beneath a ridge sliding in over the Western U.S.. However...a few weakening Pacific systems will allow orographically enhanced precipitation to continue across the Pacific Northwest and northern Rockies Monday and Tuesday...with accumulating snow expected in the higher elevations. Gerhardt Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php