Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 PM EDT Fri Apr 07 2017 Valid 00Z Sat Apr 08 2017 - 00Z Mon Apr 10 2017 ...Wintry precipitation will taper off across the Northeast overnight and into Saturday morning... ...Freezing temperatures expected overnight across the Ohio and Tennessee Valleys, as well as portions of the Mid Atlantic, bringing potential impacts to vegetation... ...A combination of rain, thunderstorms, and higher elevation snow will impact much of the western U.S. through the weekend... ...High wind warnings and advisories will remain in effect across the western U.S. through the weekend... ...Red Flag conditions across New Mexico through tomorrow... A low pressure system will continue to track along the north Atlantic Seaboard over the next couple of days. As it lifts northward and away from the Northeast states, wintry precipitation should eventually come to an end throughout the overnight and into the day Saturday. Behind this low pressure system, a strong high pressure ridge has set in across much of the central conus. Cold air aloft from Canada will surge southward east of the Mississippi River behind the upper level trough. This will couple with the surface ridge moving in overhead, and allow temperatures to cool to below freezing overnight across much of the Ohio and Tennessee Valleys, eastward into the Mid-Atlantic. Freeze warnings and frost advisories are in effect for these areas. Meanwhile, across the western U.S., a strong cold front will continue to track eastward across the region. This will interact with several disturbances near the Pacific Northwest coast, as well as a strong upper level trough and jet streak, which will pull abundant moisture inland from the Pacific. A combination of rain and thunderstorms can be expected across much of the western U.S. over the next couple of days. However, as you rise higher in elevation, precipitation should change over to snow. Winter Storm Warnings are currently in effect for the Sierra Nevadas of California for the weekend snow, where between 2 and 4 feet of snow will be possible along the highest crests, with additional winter weather headlines posted across portions of the Northern Rockies. In addition to the precipitation, this system is also ushering in some strong winds, generally from the west and southwest. Behind the cold front where moisture is present, Wind Advisories and Warnings are in effect from the Central and Northern Great Basin westward, as well as portions of the northern plains. However, ahead of the cold front, from the Central and Southern Rockies eastward through the plains, high winds are combining with much drier conditions. Red flag warnings have been posted across almost all of New Mexico through Saturday evening, as well as portions of western Wyoming, southern and central South Dakota, and western Nebraska through this evening. Wix Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php