897
FXUS01 KWBC 071927
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
227 PM EST THU DEC 07 2023
VALID 00Z FRI DEC 08 2023 - 00Z SUN DEC 10 2023
...EXCESSIVE RAINFALL THREAT WINDING DOWN ACROSS THE PACIFIC
NORTHWEST FOR NOW...
...COLD, UNSETTLED WEATHER TO SHIFT INTO THE INTERMOUNTAIN WEST
AND PLAINS THROUGH THIS WEEKEND...
...WELL ABOVE AVERAGE AND POTENTIALLY RECORD-BREAKING WARMTH
FORECAST ACROSS THE CENTRAL UNITED STATES OVER THE NEXT FEW DAYS...
A BRIEF BREAK IN THE PACIFIC FLOW THANKS TO AN AMPLIFYING
UPPER-LEVEL PATTERN BRIEFLY CUTS OFF MUCH OF THE MOIST PACIFIC
FLOW INTO THE NORTHWEST, HOWEVER THE PRESENCE OF A LINGERING
FRONTAL SYSTEM OFF THE COAST WILL ENSURE LIGHT TO LOCALLY MODERATE
RAINFALL AND ELEVATION SNOW REMAINS THROUGH TODAY ACROSS THE
PACIFIC NORTHWEST. AS THIS SYSTEM ADVANCES EASTWARD COLD AIR WILL
FILTER IN BEHIND RESULTING IN DROPPING SNOW LEVELS. LOCALLY HEAVY
MOUNTAIN SNOWFALL BEGINNING TODAY ATOP PORTIONS OF THE CASCADES,
NORTHERN ROCKIES, AND SIERRA MADRE, WHERE SCATTERED WINTER WEATHER
ADVISORIES ARE IN EFFECT. PORTIONS OF THE NORTHERN-HIGH PLAINS
COULD ALSO SEE MODERATELY IMPACTFUL WINTER WEATHER BEGINNING LATER
TODAY INTO TOMORROW, OWING PRIMARILY TO BLOWING SNOWFALL (WITH 1-3
INCHES EXPECTED) BEHIND A DEEPENING LOW-PRESSURE CENTER LIFTING
OUT OF THE CANADIAN ROCKIES. BELOW AVERAGE TEMPERATURES WILL
BECOME MORE WIDESPREAD WEST OF THE CONTINENTAL DIVIDE AS THE LOW
PRESSURE AND STRONG COLD FRONT TRACK SOUTH AND EAST.
A LARGE PORTION OF THE CENTRAL U.S. WILL BE WARMER AND DRIER
THROUGH FRIDAY, WITH DAILY MAXIMUMS IN THE 60S AND 70S. A FEW
LOCATIONS ACROSS THE GREAT PLAINS AND UPPER MIDWEST ARE ON TRACK
TO REACH OR EXCEED DAILY TEMPERATURE RECORDS FOR EARLY DECEMBER.
HOWEVER, GUSTY WINDS AND UNSETTLED WEATHER ARE SET TO RETURN AS
THE COLD AIR SWEEPS DOWN THE PLAINS, WITH MODERATE TO LOCALLY
HEAVY SNOW POSSIBLE ACROSS THE MOUNTAINOUS TERRAIN OF THE ROCKIES,
AND STRONG WESTERLY WINDS ALSO FORECAST ACROSS PARTS OF THE HIGH
PLAINS. AS THE FRONT SWEEPS EVEN FURTHER EAST, SPC IS ALSO
MONITORING AN AREA OF POSSIBLE SEVERE WEATHER THIS SATURDAY ACROSS
THE LOWER MS VALLEY AS UNSTABLE GULF OF MEXICO AIR RETURNS NORTH
AHEAD OF THE COLD FRONT.
CAMPBELL/ASHERMAN
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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