Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 150 AM EST Mon Nov 25 2019 Valid 12Z Mon Nov 25 2019 - 12Z Wed Nov 27 2019 ...Weather becoming increasingly unsettled from the West Coast to the Midwest ... The overall weather pattern over the continental U.S. is forecast to become increasingly active for the first half of the work week as two major storm systems make weather headlines. The first system will be an amplifying upper level trough over the Rockies and northern Plains that will induce lee-side cyclogenesis over the western High Plains Monday night, and the surface low is forecast to continue deepening as it tracks northeastward across the central Plains and then the Midwest by Tuesday night. The air mass to the north and west of the low will be cold enough to support a broad swath of significant snowfall, extending from the Colorado Rockies to Wisconsin where winter storm watches and warnings are currently in effect. Given the tight pressure gradient with this low pressure system, very windy conditions are likely across much of the Plains, and high wind watches are in effect for the Texas and Oklahoma panhandles, as well as adjacent portions of neighboring states. An even stronger storm is expected to develop over the eastern Pacific and reach the West Coast by Tuesday night. This low pressure system will likely undergo bombogenesis (pressure drop of at least 24mb in 24 hours) from Monday night to Tuesday night, at which point it could become a 980 mb low with hurricane force winds offshore! It should reach land near the California/Oregon border early Tuesday night and then begin to gradually weaken as it moves inland. The mountains of southern Oregon and northern California are likely to get hammered with blizzard conditions, and battering surf and high winds for coastal areas. Winter storm watches and warnings are already in effect for many of these areas, and the cold nature of the event will result in lower than usual snow levels. Pre-Thanksgiving travel in this region could be severely affected, and local forecast offices have additional information pertaining to this. Elsewhere across the nation, showers and thunderstorms are forecast to develop from the central Gulf Coast to the Ohio Valley in the warm sector of the developing storm system over the Plains, with rainfall amounts approaching one inch in some locations. Conditions will continue to improve for the East Coast through Tuesday with sunny to partly cloudy skies expected. Hamrick Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php