Prognostic Meteorological Discussion
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000
FXUS01 KWBC 191949
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
249 PM EST SUN NOV 19 2017

VALID 00Z MON NOV 20 2017 - 00Z WED NOV 22 2017

...HEAVY PRECIPITATION FOR PARTS OF THE NORTHEAST AND PACIFIC
NORTHWEST WHILE DRY FOR THE CENTRAL STATES...

SCATTERED TO WIDESPREAD PRECIPITATION IS OCCURRING FROM THE UPPER
MISSISSIPPI VALLEY TO THE OHIO VALLEY AND ACROSS THE NORTHEAST.
AREAS DOWNWIND OF THE GREAT LAKES ARE OBSERVING ENHANCEMENT FROM
THE LAKES. COVERAGE AND INTENSITY IS HIGHER OVER EASTERN MAINE
WITH RELATION TO THE CENTRAL LOW PRESSURE. COOLER AND DRIER AIR
WILL BEGIN TO FILTER INTO THE REGION ON MONDAY. LAKE SHORE FLOOD
WARNINGS AND LAKE EFFECT SNOW WARNINGS ARE IN EFFECT FOR COUNTIES
NEAR LAKE ERIE. WINTER WEATHER ADVISORIES ARE IN EFFECT FOR
PORTIONS OF NORTHEAST MICHIGAN AND WESTERN NEW YORK. WIDESPREAD
GUSTY WINDS WILL PERSIST TONIGHT - NUMEROUS WIND ADVISORIES ARE IN
EFFECT NEAR THE COAST FROM DELAWARE TO SOUTHERN MAINE.

A PLUME OF VERY MOIST AIR... KNOWN AS AN ATMOSPHERIC RIVER... WILL
MOVE ONSHORE THE PACIFIC NORTHWEST RESULTING IN SEVERAL INCHES OF
RAINFALL ALONG THE COAST AND LOWER ELEVATIONS AND HEAVY SNOW IN
THE MOUNTAINS. SOME RANGES MAY REACH OR EXCEED ACCUMULATIONS OVER
A FOOT.

AN EXPANSIVE HIGH PRESSURE RIDGE WILL EXPAND FROM THE GREAT BASIN
TO THE SOUTHERN PLAINS; WHICH WILL KEEP CONDITIONS WARM AND DRY.
FIRE WEATHER CONCERNS WILL PERSIST ACROSS PARTS OF NEW MEXICO AND
TEXAS WITH THESE DRY AND WINDY CONDITIONS.

CAMPBELL

GRAPHICS AVAILABLE AT
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
$$





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