Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 327 PM EST Sat Dec 05 2020 Valid 00Z Sun Dec 06 2020 - 00Z Tue Dec 08 2020 ...Nor'easter to wind down over New England by Sunday evening... ...An Elevated Risk for fire weather in Southern California; Air Stagnation Advisories for the Northwest... A strong Nor'easter over the New England Coast will move northeastward into the Canadian Maritimes by Monday. The system will produce snow, rain, and strong wind through Sunday evening. The snow amounts will be an additional twelve inches over most of New England with an isolated eighteen inches in some areas through Monday. Heavy rain will also develop along the immediate New England Coast through Sunday. The combination of heavy snowfall rates and strong wind will lead to treacherous travel conditions, whiteout visibilities, and the potential for tree damage/power outages. The National Weather Service has issued Winter Storm Warnings up across most of New England. In addition to the rain and snow, strong wind will develop along the New England Coast, where high surf, coastal flooding, and beach erosion are possible. Meanwhile, most of Western U.S. remains under the influence of a large dome of high pressure, keeping relatively calm weather in place throughout the Intermountain West and the Plains. Elevated fire weather conditions persist in the higher elevations of Southern California. Farther north, a weakening boundary will move into the Pacific Northwest, aiding developing rain showers on Saturday evening and into early Sunday morning. High pressure builds back in the overhead by the Sunday afternoon, leading to dry air conditions for the rest of Sunday. Air Stagnation Advisories remain in effect for much of the interior Northwest through Monday, as upper-level ridging returns and high pressure at the surface will lead to poor air quality. Furthermore, upper-level energy will help develop a wave of low pressure over the Tennessee Valley and the Southeast on Sunday evening into Monday. The energy will help produce scattered rain showers over parts of the Western/Central Gulf Coast on Saturday evening into Sunday morning. The system will also help create light snow over the Central Appalachians and light rain over parts of the Southeast on Monday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php