616
FXUS66 KPQR 271751 AAA
AFDPQR
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PORTLAND OR
1051 AM PDT SUN APR 27 2025
SYNOPSIS
COOLER AND DRIER ACROSS THE AREA TODAY IN THE WAKE
OF A DEPARTING SYSTEM OVER CALIFORNIA. ONSHORE FLOW BRINGS
BENIGN CONDITIONS AND SEASONABLE TEMPERATURES THROUGH THE START
OF THE WEEK. A PASSING FRONT WILL BRING A CHANCE FOR RAIN ACROSS
THE AREA MONDAY NIGHT INTO TUESDAY, BUT DO NOT EXPECT ANY
SIGNIFICANT PRECIPITATION AMOUNTS. WEATHER BRIEFLY TURNS WARMER
AND DRIER AGAIN WEDNESDAY AND THURSDAY BEFORE ANOTHER SYSTEM
RETURNS COOLER AND CLOUDIER CONDITIONS TO THE REGION LATE NEXT
WEEK.
SHORT TERM...NOW THROUGH TUESDAY NIGHT
LINGERING SHOWER
ACTIVITY HAS TAPERED OFF ACROSS THE AREA THIS MORNING AS THE
UPPER LOW WHICH HAD BEEN SITTING SOUTH OF THE REGION FOR THE
PAST FEW DAYS DEPARTS INTO THE GREAT BASIN. THIS WILL USHER IN
DRIER NORTHERLY FLOW OVER THE PACIFIC NORTHWEST TODAY, YIELDING
BENIGN, PARTLY CLOUDY CONDITIONS WITH AFTERNOON HIGHS NEAR
SEASONAL NORMS IN THE LOW TO MID 60S. EXPECT MUCH OF THE SAME TO
START THE WORK WEEK AS ONSHORE STRENGTHENS ON MONDAY ATOP A
WEAK RIDGE NOSING INTO THE REGION FROM THE PACIFIC. A WEAK
EMBEDDED SHORTWAVE AND ATTENDANT SURFACE FRONT WILL CROSS THE
REGION AND BRING THE NEXT CHANCE OF RAIN MONDAY NIGHT INTO
TUESDAY. MODEL QPF WITH THIS SYSTEM CONTINUES TO LOOK RATHER
MEAGER, WITH MOST AREAS STAYING BELOW A TENTH OF AN INCH. THE
BEST CHANCES FOR HIGHER AMOUNTS WILL BE OVER FAR NORTHERN
COASTAL AREAS, WITH THE NBM DEPICTING ABOUT A 50% CHANCE FOR A
QUARTER INCH OVER PARTS OF PACIFIC COUNTY BUT ONLY AROUND A 20%
CHANCE FOR ASTORIA AND THE NORTH OREGON COAST. DAYTIME HIGHS
GENERALLY REMAIN IN THE LOW TO MID 60S INLAND AND THE 50S ALONG
THE COAST THROUGH TUESDAY. STRONG ONSHORE FLOW WILL ALSO FAVOR
GUSTY WEST WINDS THROUGH THE COLUMBIA RIVER GORGE, GUSTING AS
HIGH AS 25-35 MPH AT TIMES IN HOOD RIVER COUNTY. /CB
LONG TERM...WEDNESDAY THROUGH SATURDAY
WARMER AND DRYER
WEATHER RETURNS TO THE REGION ON WEDNESDAY AS A RIDGE OF HIGH
PRESSURE BUILDS OVERHEAD AND SENDS TEMPERATURES BACK INTO THE
70S IN THE INTERIOR LOWLANDS. LATEST GUIDANCE CONTINUES TO
SUGGEST THURSDAY WILL BE THE HOTTEST DAY OF THE WEEK, WITH THE
NBM INDICATING AN 80-90% PROBABILITY TO REACH 80 DEGREES IN THE
PORTLAND METRO AND A 40-60% CHANCE ACROSS THE REST OF THE
INTERIOR VALLEY LOCATIONS. COASTAL LOCATIONS WILL NOTABLY REMAIN
COOLER AS MARINE LAYER INFLUENCES HOLD TEMPERATURES IN THOSE
LOCATIONS DOWN IN THE 60S. THE PERIOD OF WARM WEATHER WILL BE
RELATIVELY SHORT LIVED AS WPC ENSEMBLES CLUSTERS SHOW GOOD
AGREEMENT INT HE RIDGE SHIFTING EAST BY FRIDAY AND OPENING THE
DOOR FOR THE NEXT UPPER LEVEL TROUGH APPROACHING THE REGION.
THIS WILL BRING ANOTHER ROUND OF COOLER AND WETTER WEATHER TO
THE AREA FROM FRIDAY INTO NEXT WEEKEND. /CB
AVIATION
VFR CONDITIONS EXPECTED INLAND WITH A STRATUS DECK
AROUND 3-4.5 KFT THAT WILL SLOWLY DISSIPATE THROUGH THE DAY. SOUTH
WINDS AROUND 5 KT EXPECTED THROUGH THE DAY, TURNING WESTERLY THIS
EVENING. COULD HAVE ANOTHER MARINE PUSH INLAND TONIGHT BUT
CONFIDENCE IS LOW IN WHETHER IT WILL BRING MVFR CIGS OR JUST LOW
END VFR.
MIX OF MVFR AND VFR CONDITIONS ALONG THE COAST. KAST IS EXPECTED
TO REMAIN MVFR THROUGH THE DAY WITH PROBS GREATER THAN 70%. KONP
IS CURRENTLY VFR AND SHOULD STAY THAT WAY INTO THE AFTERNOON
BEFORE ANOTHER MARINE LAYER DEVELOPS THIS EVENING. WINDS W/NW AT
5-10 KT EXPECTED.
PDX AND APPROACHES...EXPECT MOSTLY VFR CONDITIONS THROUGH THE TAF
PERIOD. COULD SEE ANOTHER MARINE PUSH OVERNIGHT BUT CONFIDENCE IS
LOW IN WHETHER THIS WILL BE MVFR OR LOW END VFR CIGS. WINDS
SOUTHERLY AROUND 5 KT, TURNING WEST THIS EVENING. -BATZ
MARINE
HIGH PRESSURE OVER THE NORTHEAST PACIFIC CONTINUES TO
SHIFT INLAND, RESULTING IN WINDS AND SEAS EASING THROUGH THIS
MORNING. EXPECT SMALL CRAFT ADVISORY CONDITIONS TO COME TO AN
END BY THIS AFTERNOON, AROUND 2 PM. THE START OF NEXT WEEK LOOKS
TO BE RATHER QUIET, WITH SEAS AROUND 5 TO 7 FEET AND MOSTLY
NORTHWESTERLY WINDS AT OR BELOW 10 KT.
THE COLUMBIA RIVER BAR IS ALSO EXPERIENCING SMALL CRAFT ADVISORY
CONDITIONS IN THE FORM OF STEEP EBB CHOP AND WILL COME TO END BY
8 AM TODAY. COULD SEE MORE STEEP EBB CHOP TOMORROW MORNING, WITH
AN EBB CURRENT OF 7.35 KT AND SEAS 7 TO 8 FEET.
~HALL
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...SMALL CRAFT ADVISORY UNTIL 2 PM PDT THIS AFTERNOON FOR
PZZ271>273.
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