Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 336 AM EST Sun Nov 14 2021 Valid 12Z Sun Nov 14 2021 - 12Z Tue Nov 16 2021 ...Heavy rain and mountain snow resume over the Pacific Northwest.... ...An Alberta clipper will deliver rain/snow and gusty winds across the Great Lakes today and then New England on Monday... ...Another Alberta clipper will bring light rain/snow for the northern Plains to upper Midwest into 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 compact low pressure center that brought a quick dose of rain, high elevation snow, and gusty winds through New England last night is quickly moving off into the Canadian Maritimes early this morning. Clearing skies will quickly move into the Northeast today as mixed rain and snow from an Alberta clipper moving across the upper Midwest this morning spreads into the Great Lakes. While the mixed rain and snow associated with this system will mainly be light, its coverage will be widespread as the clipper tracks across the Great Lakes today and then across New England on Monday. The western slopes of the central Appalachians will likely see a few inches of snow while the lee side of the lower Great Lakes should see locally higher amounts on Monday when colder air will be dragged across the warm lake waters behind the system. By Tuesday morning, the clipper should have moved far away into the Canadian Maritimes that the lake-effect rain/snow and mixed precipitation over interior New England will be tapering off. Over the Pacific Northwest, heavy rain has resumed as another moist plume of Pacific air arrives well ahead of an active warm front. While it appears that this round of heavy precipitation will be confined to the northwestern portion of Washington state, the unrelenting surge of moisture will lead to a slight risk of flash flooding today especially for the higher elevations of northwestern Washington state. A much stronger low pressure system is forecast to form across British Columbia on Monday and will likely move into Alberta, Canada by Tuesday morning. Colder air will be ushered into the Pacific Northwest with heavy snow spreading into the Cascades. The higher elevations of the northern Cascades will likely see up to a couple of feet of heavy snow. In addition, high winds will overspread the Pacific Northwest, northern Rockies, followed by the northern High Plains Monday night into Tuesday when the low pressure system intensifies very rapidly. This system will also bring lighter amounts of rain/snow across the northern Rockies Monday night into Tuesday. Meanwhile, another Alberta clipper is forecast to bring a round of light rain/snow across the northern Plains to upper Midwest today into Monday morning before the clipper is absorbed by the rapidly intensifying storm over southwestern Canada. The entire western U.S. will remain milder than normal for the next couple of days before much colder air rushes into the Pacific Northwest behind the big storm later on Monday. Meanwhile, much milder than normal conditions are expected over the northern High Plains on Monday as warm downslope flow develops behind the Alberta clipper. Kong Graphics are available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php