204 

WWUS76 KPDT 301705

NPWPDT



URGENT - WEATHER MESSAGE

National Weather Service Pendleton OR

905 AM PST Tue Dec 30 2025



ORZ049-310700-

/O.NEW.KPDT.WI.Y.0036.251230T1705Z-251231T0700Z/

Grande Ronde Valley-

Including the cities of La Grande, Cove, Union, and Elgin

905 AM PST Tue Dec 30 2025



...WIND ADVISORY IN EFFECT UNTIL 11 PM PST THIS EVENING FOR LADD AND 

PYLES CANYONS...



* WHAT...South winds 25 to 35 mph with gusts up to 55 mph for Ladd 

  and Pyles Canyons.



* WHERE...Grande Ronde Valley.



* WHEN...Until 11 PM PST this evening.



* 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>029-310700-

/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, Naches, Dayton, Hermiston,

Dufur, Moro, Prosser, Ione, Madras, Sunnyside, Prineville,

Waitsburg, Yakima, Walla Walla, Condon, Ellensburg, Pilot Rock,

Fossil, Thorp, Maupin, Athena, Toppenish, Pendleton, Tri-Cities,

Bend, Boardman, Redmond, and Heppner

905 AM 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.



&&



$$



MC