657
FXUS01 KWBC 290822
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
321 AM EST MON NOV 29 2021
VALID 12Z MON NOV 29 2021 - 12Z WED DEC 01 2021
...LIGHT TO MODERATE RAIN SHOWERS TO CONTINUE OVER PORTIONS OF THE
PACIFIC NORTHWEST...
...LAKE EFFECT SNOW SHOWERS CONTINUE ACROSS GREAT LAKES REGION
OVER THE NEXT COUPLE OF DAYS...
...WARMER TEMPERATURES AHEAD FOR MUCH OF THE COUNTRY; ELEVATED
FIRE WEATHER RISK FOR SOUTHERN CALIFORNIA...
A QUIETER AND WARMER PATTERN IS IN STORE FOR MUCH OF THE COUNTRY
AS UPPER-LEVEL ENERGY REMAINS EITHER OVER CANADA OR STATIONARY OFF
THE BAJA COAST. A DEEPENING LOW PRESSURE SYSTEM OFF THE NORTHEAST
COAST WILL CAUSE GUSTY WINDS ACROSS NEW ENGLAND THIS AFTERNOON
THROUGH TONIGHT. A WEAK CLIPPER SYSTEM WILL BRING YET ANOTHER
ROUND OF SNOW SHOWERS TO THE GREAT LAKES REGION OVER THE NEXT TWO
DAYS. SNOWFALL TOTALS WILL BE LESS THAN THE PREVIOUS SYSTEM, BUT
AREAS DOWNWIND OF THE GREAT LAKES MAY RECEIVE HIGHER AMOUNTS DUE
TO LAKE EFFECT ENHANCEMENT. A WEAK ATMOSPHERIC RIVER WILL ARRIVE
OVER MUCH OF BRITISH COLUMBIA, CANADA AND PARTS OF THE PACIFIC
NORTHWEST ON TUESDAY. RAINFALL AMOUNTS IN THE U.S. WILL BE HIGHEST
OVER AREAS THAT BORDER BRITISH COLUMBIA SUCH AS THE NORTHERN
CASCADES AND OLYMPIC MOUNTAINS DUE TO OROGRAPHIC ENHANCEMENT. ONLY
A FEW INCHES OF RAIN ARE EXPECTED TO ACCUMULATE BY THE TIME THAT
THE AR EVENT ENDS ON TUESDAY NIGHT.
PERSISTENT UPPER-LEVEL RIDGING IN THE WEST LONGWAVE TROUGHING IN
THE EAST AND A CUTOFF LOW OVER BAJA CALIFORNIA WILL CONTRIBUTE TO
THE SPREAD OF WARM AIR ACROSS THE MUCH OF THE CONUS OVER THE NEXT
SEVERAL DAYS. TEMPERATURES ARE EXPECTED TO BE BETWEEN 25-30
DEGREES ABOVE AVERAGE OVER MUCH OF THE NORTHERN/CENTRAL PLAINS
TODAY, WHILE THE EAST EXPERIENCES A COOLDOWN IN THE WAKE OF A
DEEPENING AREA OF LOW PRESSURE SYSTEM AND ITS ASSOCIATED COLD
FRONT MOVING INTO THE NORTH ATLANTIC. TEMPERATURES WILL MODERATE A
BIT ON TUESDAY BEFORE ANOTHER SUBSTANTIAL WARM-UP RETURNS TO THE
NORTHERN PLAINS ON WEDNESDAY AND SPREADS EAST THROUGH THE END OF
THE WEEK. THE ROCKIES WILL EXPERIENCE THIS WARM SPELL TOO, WHICH
SHOULD BE DISAPPOINTING TO SNOW LOVERS, PARTICULARLY IN THE
CENTRAL ROCKIES AREA, AS MUCH OF THE REGION CONTINUES TO
EXPERIENCE A DRYER THAN NORMAL SNOW SEASON. ELEVATED FIRE WEATHER
RISK IS IN EFFECT FOR PARTS OF SOUTHERN CALIFORNIA THROUGH TUESDAY
DUE TO MARGINALLY DRY AND WINDY CONDITIONS.
KEBEDE
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