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Short Range Public Discussion
 
(Latest Discussion - Issued 0749Z Nov 25, 2017)
 
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Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 249 AM EST Sat Nov 25 2017 Valid 12Z Sat Nov 25 2017 - 12Z Mon Nov 27 2017 ...Heavy precipitation for the Pacific Northwest and Northern California this weekend... ...Well-above normal temperatures across the western and central U.S. through the weekend... Widespread precipitation will spread across the Pacific Northwest, south into northern California and east into portions of the Northern Rockies as a low pressure system approaches the West Coast. The coastal areas will likely have periods of higher rainfall rates, which may result in locally heavy rain. Snow is expected to mix in at the higher elevations, with accumulations of 4 to 8 inches possible for portions of the Cascades and Sierras on Sunday. As snow amounts decrease of the Pacific Northwest and California by late Sunday, accumulations are forecast to increase over southwest Montana/northwest Wyoming on Monday. With a ridge of high pressure anchored over the West, much of the southwest and south-central states will run warmer than seasonal average for late November. Several locations today in the Southwest will have highs running upwards of 20 degrees warmer; which may tie or set a new daily record. Temperatures 20 degrees above normal will spread to the Rockies, Northern and Central Plains by Sunday, with more possibilities for record highs and record high minimum temperatures. For the East, temperatures are expected to be 5 to 10 degrees above average today before falling to below average on Sunday after the cold front sweeps through. This system will bring light rain and snow to the Great Lakes region, northern Mid-Atlantic and the Northeast. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php