302
WWUS76 KPDT 310551
NPWPDT
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PENDLETON OR
951 PM PST TUE DEC 30 2025
ORZ049-312300-
/O.EXT.KPDT.WI.Y.0036.000000T0000Z-251231T2300Z/
GRANDE RONDE VALLEY-
INCLUDING THE CITIES OF LA GRANDE, UNION, COVE, AND ELGIN
951 PM PST TUE DEC 30 2025
...WIND ADVISORY NOW IN EFFECT UNTIL 3 PM PST WEDNESDAY FOR LADD AND
PYLES CANYONS...
* WHAT...SOUTH WINDS 20 TO 30 MPH WITH GUSTS UP TO 45 MPH FOR LADD
AND PYLES CANYONS.
* WHERE...SOUTHERN GRANDE RONDE VALLEY.
* WHEN...UNTIL 3 PM PST WEDNESDAY.
* IMPACTS...GUSTY WINDS WILL BLOW AROUND UNSECURED OBJECTS. TREE
LIMBS COULD BE BLOWN DOWN AND A FEW POWER OUTAGES MAY RESULT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT, ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.
ORZ044-507-508-510-511-WAZ026>029-312300-
/O.CON.KPDT.AS.Y.0002.000000T0000Z-260101T2000Z/
LOWER COLUMBIA BASIN OF OREGON-FOOTHILLS OF THE NORTHERN BLUE
MOUNTAINS OF OREGON-FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF
OREGON-NORTH CENTRAL OREGON-CENTRAL OREGON-KITTITAS VALLEY-YAKIMA
VALLEY-LOWER COLUMBIA BASIN OF WASHINGTON-FOOTHILLS OF THE BLUE
MOUNTAINS OF WASHINGTON-
INCLUDING THE CITIES OF CONNELL, BOARDMAN, MADRAS, HEPPNER,
PROSSER, MORO, PENDLETON, DUFUR, ELLENSBURG, PILOT ROCK, IONE,
DAYTON, TOPPENISH, REDMOND, WALLA WALLA, THORP, FOSSIL, MAUPIN,
WAITSBURG, SUNNYSIDE, BEND, HERMISTON, YAKIMA, CONDON,
PRINEVILLE, NACHES, ATHENA, AND TRI-CITIES
951 PM PST TUE DEC 30 2025
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL NOON PST
THURSDAY...
* WHAT...STAGNANT CONDITIONS WILL HAVE THE POTENTIAL TO TRAP
POLLUTANTS NEAR THE GROUND AND DETERIORATE AIR QUALITY.
* WHERE...FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON AND WASHINGTON,
LOWER COLUMBIA BASIN OF OREGON AND WASHINGTON, NORTH CENTRAL
OREGON, CENTRAL OREGON, KITTITAS VALLEY, AND YAKIMA VALLEY.
* WHEN...UNTIL NOON PST THURSDAY.
* IMPACTS...PERIODS OF AIR STAGNATION CAN LEAD TO THE BUILDUP OF
POLLUTANTS NEAR THE SURFACE, POTENTIALLY LEADING TO POOR AIR
QUALITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
AN AIR STAGNATION ADVISORY INDICATES THAT DUE TO LIMITED MOVEMENT OF
AN AIR MASS ACROSS THE ADVISORY AREA, POLLUTION HAS THE POTENTIAL TO
INCREASE TO DANGEROUS LEVELS. PERSONS WITH RESPIRATORY ILLNESS
SHOULD FOLLOW THEIR PHYSICIANS ADVICE FOR DEALING WITH HIGH LEVELS
OF AIR POLLUTION DURING PERIODS OF STAGNANT AIR, STATE AIR QUALITY
AGENCIES HIGHLY RECOMMEND THAT NO OUTDOOR BURNING OCCUR AND THAT
RESIDENTIAL WOOD BURNING DEVICES BE LIMITED AS MUCH AS POSSIBLE.
ACCORDING TO STATE AIR QUALITY AGENCIES, PROLONGED PERIODS OF
STAGNANT AIR CAN HOLD POLLUTANTS CLOSE TO THE GROUND, WHERE PEOPLE
LIVE AND BREATHE. CHECK WITH YOUR LOCAL BURN AGENCY FOR ANY CURRENT
RESTRICTIONS IN YOUR AREA.
PDT
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