Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 300 PM EST Sun Nov 14 2021 Valid 00Z Mon Nov 15 2021 - 00Z Wed Nov 17 2021 ...Heavy rain and mountain snow resume over the Pacific Northwest.... ...An Alberta clipper will deliver rain/snow and gusty winds to the Great Lakes tonight and then New England on Monday... ...Light rain/snow will fall across the Northern Plains to Upper Midwest through Monday morning... ...A much stronger storm will spread mountain snows and high winds across the northern Rockies to northern High Plains Monday night to Tuesday... A slow moving, yet potent low pressure system will bring an Atmospheric River event in the form of heavy mountain snow to the Cascades and heavy low elevation rainfall to the Pacific Northwest through Monday. Heavy rainfall will soak the Olympic Peninsula and northern Washington Cascades through Monday morning where Slight Risks of Excessive Rainfall are in effect. Multiple inches are likely for these areas over the next 24 hours. This system will deepen as it glides across southwestern Canada over the next few days. It will generate high winds over the Northern Rockies/Plains as it continues to deepen tonight. High temperatures will rise steeply over this area to between 25-30 degrees above average over the next couple of days due to the approaching deep trough. Meanwhile, a pair of Alberta clipper systems will bring winter weather to the Northern Plains and Northeast respectively over the next two days. The weaker of the two clippers will produce light rain/snow over the Northern Plains and Upper Midwest tonight before dissipating. The downstream clipper will produce light to moderate snowfall over the Lower Great Lakes, Central Appalachians and Adirondacks through Monday. Generally 2-4 inches of snow are expected with isolated higher amounts possible over the peaks of the aforementioned mountains. This clipper will simultaneously produce rainfall over coastal New England through Monday. Temperatures cool down across the east in the wake of this system, with parts of the Ohio Valley and Central Appalachians experiencing particularly cold high temperatures between 15-25 degrees on Monday. A quieter period awaits the CONUS heading into midweek. Kebede Graphics are available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php