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Short Range Public Discussion
 
(Caution: Version displayed is not the latest version. - Issued 0800Z Dec 02, 2022)
 
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Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 300 AM EST Fri Dec 02 2022 Valid 12Z Fri Dec 02 2022 - 12Z Sun Dec 04 2022 ...A quick round of mountain snow will move across the northern and central Rockies followed by the northern Plains today... ...A slow-moving low pressure system will bring lingering rain along coastal Pacific Northwest before heavy precipitation reaches into California on Saturday... ...Polar air surges southward into the central U.S. as mild and wet weather surges up the East Coast on Saturday... The cold airmass currently over the eastern U.S. will continue to modify today as the surface high moves offshore with a broad southerly flow strengthening ahead of a cold front sweeping across the Plains. A sharply colder arctic airmass will sink southward behind the front through the northern Rockies, northern Plains, and then the Upper Midwest to close out the work week, bringing subzero overnight lows across portions of Montana, North Dakota, and northern Minnesota. In the mean time, the anomalous warmth over the Plains ahead of the sharp front will reach the East Coast on Saturday, where high temperatures on the order of 10-20 degrees above normal are expected, together with a period of wet weather. However, reality will quick return by early on Sunday as blustery northwesterly winds usher in a fresh dose of arctic air into the region behind the sharp front. Showers and a few thunderstorms are expected to develop later today from the Mid-South to the Ohio Valley as moisture is advected north ahead of the approaching front. This will likely increase in coverage going into Saturday for the Mid-Atlantic and the Northeast U.S., which could end as a brief period of snow across the higher terrain of the interior Northeast states. Given the progressive nature of the front, rain and snowfall totals will be kept in check with generally light to moderate amounts. A quick round of mountain snow will move across the northern and central Rockies followed by the northern Plains today in response to a low pressure system quickly developing over the northern High Plains and racing northeast towards the Great Lakes where a period of snow is forecast early Saturday. Meanwhile, snow will taper off across the Sierra Nevada behind the exiting system. However, a slow-moving low pressure system will bring lingering rain along coastal Pacific Northwest over the next couple of days before heavy precipitation reaches into California on Saturday. Another round of heavy snow appears likely for the Sierra Nevada by late Saturday and into Sunday as the bulk of the moisture associated with the system pushes onshore. Noteworthy snow is also expected across the higher terrain of Utah, Wyoming, and central Colorado as the moisture plume from the Pacific advects farther inland, with up to a foot of accumulation possible. High winds will also be making weather headlines today across the western High Plains, where high wind warnings are currently in effect from northeast New Mexico to eastern Wyoming. Winds could gust in excess of 50 mph at times, and there will also be a greater fire weather danger owing to the combination of high winds and low humidity. Kong/Hamrick Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php