Prognostic Meteorological Discussion
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000
FXUS01 KWBC 241940
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
239 PM EST FRI NOV 24 2017

VALID 00Z SAT NOV 25 2017 - 00Z MON NOV 27 2017

...HEAVY RAINFALL POSSIBLE ACROSS THE PACIFIC NORTHWEST AND
NORTHERN CALIFORNIA...

...WELL ABOVE NORMAL TEMPERATURES ACROSS THE WESTERN AND CENTRAL
U.S. THROUGH THE WEEKEND...

THE NORTHWESTERN U.S. WILL REMAIN WET OVER THE WEEKEND, AS A LOW
PRESSURE SYSTEM APPROACHES AND ONSHORE FLOW STRENGTHENS, BRINGING
PLENTY OF MOISTURE TO THE AREA. RAIN CHANCES ARE FORECAST TO
INCREASE ACROSS THE PACIFIC NORTHWEST ON SATURDAY, SPREADING
EASTWARD INTO THE NORTHERN GREAT BASIN AND SOUTHWARD INTO NORTHERN
CALIFORNIA ON SATURDAY NIGHT. LOCALLY HEAVY RAIN IS POSSIBLE. SOME
SNOW IS EXPECTED TO MIX IN AT THE HIGHER ELEVATIONS, BUT SNOW
ACCUMULATIONS ARE NOT FORECAST TO BE VERY HIGH THROUGH SUNDAY
AFTERNOON--GENERALLY LESS THAN 6 INCHES IN THE NORTHERN CASCADES.
MORE SNOW IS LIKELY JUST AFTER THE SHORT RANGE FORECAST PERIOD,
HOWEVER.

A COLD FRONT WILL SWEEP THROUGH THE EASTERN U.S. OVER THE NEXT
COUPLE OF DAYS, WITH A SECONDARY FRONT MOVING THROUGH THE GREAT
LAKES AND NORTHEAST BEHIND IT. SOME LIGHT RAIN AND SNOW IS
EXPECTED FOR THE GREAT LAKES, NORTHERN MID-ATLANTIC, AND NORTHEAST
DUE TO THESE FRONTS.

TEMPERATURE-WISE, MUCH OF THE CONTINENTAL U.S. WILL BE WARMER THAN
AVERAGE THIS WEEKEND, WITH HIGHS UP TO 20 DEGREES ABOVE AVERAGE IN
THE SOUTHWEST ON SATURDAY. A FEW RECORD HIGHS ARE POSSIBLE THERE.
TEMPERATURES 20 DEGREES ABOVE NORMAL SPREAD TO THE ROCKIES AND
NORTHERN AND CENTRAL PLAINS BY SUNDAY, WITH MORE POSSIBILITIES FOR
RECORD HIGHS AND RECORD HIGH MINIMUM TEMPERATURES. THE EASTERN
U.S. WILL GENERALLY BE 5 TO 10 DEGREES ABOVE AVERAGE ON SATURDAY,
BUT HIGH TEMPERATURES ARE FORECAST TO BE FEW DEGREES BELOW AVERAGE
ON SUNDAY, RELATED TO THE COLD FRONTAL PASSAGE.

TATE

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




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