Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 300 AM EST Sun Dec 19 2021 Valid 12Z Sun Dec 19 2021 - 12Z Tue Dec 21 2021 ...Snow across northern New England as well as showers/thunderstorms along the Eastern Seaboard will taper off later today as low pressure system moves off the East Coast... ...Unsettled weather lingers over the Pacific Northwest, the northern Rockies and into the northern High Plains... ...Low pressure system forms over the Gulf of Mexico and moves toward Florida by Tuesday morning... A low pressure system centered near the New England coast early this morning will continues to intensify as it slides quickly offshore. Snow across northern New England early this morning will gradually taper off during the day. Meanwhile, scattered showers and some thunderstorms further south along the Eastern Seaboard will linger a bit longer today but will eventually slide off the coast behind a cold front by this evening. Fine and more seasonably cold temperatures will prevail across much of the central to eastern U.S. beginning on Monday when a high pressure system dominates the weather pattern. Meanwhile, unsettled weather is expected to continue across the Pacific Northwest. A few inches of coastal/lower elevation rain and heavy snow in the Cascades can be expected. The system settling a bit into Oregon today. This system is then forecast to push back northward Sunday night into Monday as a cyclone is forecast to expand and push northward off the West Coast. Some of the heavier precipitation will then spread northward from Oregon into Washington by Monday, with the chances for snow expanding eastward into northern Montana and Idaho possibly totaling up to 10 inches. Colder air will enter the Northern Plains Sunday night into Monday behind an Alberta clipper. Snow associated with the cold front is forecast to be light. Elsewhere, rain chances are expected to increase across southern Texas later this weekend as a low pressure system is forecast to develop along a meandering front in the western Gulf of Mexico. Kong Graphics are available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php