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Short Range Public Discussion
 
(Caution: Version displayed is not the latest version. - Issued 0802Z Nov 18, 2019)
 
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Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 302 AM EST Mon Nov 18 2019 Valid 12Z Mon Nov 18 2019 - 12Z Wed Nov 20 2019 ...Coastal Low will affect the Mid-Atlantic and Northeast, and rain and mountain snow for the Northwest states... ...Heavy rain and flash flooding possible across Arizona... The nor'easter off the mid-Atlantic coast will continue to slowly track to the northeast through the middle of week. Coastal New England and areas inland will continue to have impacts from this system, primarily coastal flooding from elevated high tides, and beach erosion from high surf. These hazards will begin to diminish by late Monday/early Tuesday morning. Inland where temperatures are noticeably cooler, may have some light sleet and freezing rain as moisture from the storm is advected inland, while the heaviest precipitation is expected to remain offshore. Snow showers and a wintry mix across parts of the Upper Great Lakes and Midwest will taper off as a disturbance tracks eastward out of the region. Much of the eastern U.S. will continue to have below average temperatures over the next few days while the West enjoys above average temperatures. Temperature departures across the Great Basin and much of California will range from 10 to 20 degrees above normal, with some 90 degree high temperatures possible for the Desert Southwest. Rain and mountain snow can be expected for the Cascades and northern Rockies as fronts approach the Pacific Northwest. Moisture associated with what was Tropical Cyclone Raymond transporting northward ahead of an approaching cold front will likely bring moderate to heavy rain to parts of Arizona. High rainfall rates can quickly lead to flash flooding in this region. WPC has a Slight Risk for excessive rainfall for most of central Arizona and a Marginal for the southern two-thirds of the state. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php