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.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php