176
WWUS76 KPDT 201730
NPWPDT

URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
1030 AM PDT Thu Aug 20 2026

ORZ041-044-049-505-507-508-510-511-WAZ024-026>029-210600-
/O.NEW.KPDT.HT.Y.0006.260820T1800Z-260822T0500Z/
Eastern Columbia River Gorge of Oregon-Lower Columbia Basin of
Oregon-Grande Ronde Valley-John Day Basin-Foothills of the
Northern Blue Mountains of Oregon-Foothills of the Southern Blue
Mountains of Oregon-North Central Oregon-Central Oregon-Eastern
Columbia River Gorge of Washington-Kittitas Valley-Yakima Valley-
Lower Columbia Basin of Washington-Foothills of the Blue
Mountains of Washington-
Including the cities of Sunnyside, Thorp, Athena, Dayville, Maupin,
Bend, Pendleton, Moro, Condon, Naches, Madras, White
Salmon, Tri-Cities, Fossil, Yakima, Cove, Waitsburg, Arlington,
Union, John Day, Ione, Monument, Redmond, Ellensburg, La Grande,
Elgin, Mitchell, Toppenish, Hermiston, Dufur, Walla Walla, Prosser,
Spray, Connell, Prineville, The Dalles, Boardman, Pilot Rock, Dayton,
and Heppner
1030 AM PDT Thu Aug 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 10 PM PDT FRIDAY...

* WHAT...Hot conditions with afternoon high temperatures of 95 to 105
  degrees expected. This will pose a moderate to major risk of
  heat-related illness.

* WHERE...Portions of central, north central, and northeast Oregon
  and central, south central, and southeast Washington.

* WHEN...Until 10 PM PDT Friday.

* IMPACTS...Hot temperatures may cause heat illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

For sheltering information and other human services in your area,
dial 2 1 1 during business hours or visit 211info.org for Oregon or
wa211.org for Washington anytime.

&&

$$

ORZ050-502-503-506-WAZ030-521-523-210600-
/O.NEW.KPDT.HT.Y.0006.260820T1800Z-260822T0500Z/
Wallowa County-Northern Blue Mountains of Oregon-Southern Blue
Mountains of Oregon-Ochoco-John Day Highlands-Northwest Blue
Mountains-Simcoe Highlands-Lower Slopes of the Eastern Washington
Cascades Crest-
Including the cities of Tollgate, Seneca, Enterprise, Joseph, Long
Creek, Appleton, Cliffdell, Prairie City, Bickleton, North Powder,
Ski Bluewood Resort, Meacham, Brothers, Goldendale, Cle Elum,
Wallowa, Paulina, and Ukiah
1030 AM PDT Thu Aug 20 2026

...HEAT ADVISORY IN EFFECT UNTIL 10 PM PDT FRIDAY...

* WHAT...Hot conditions with afternoon high temperatures of 90 to 100
  degrees expected, except 100 to 110 in Hells Canyon. This will pose
  a moderate to major risk of heat-related illness.

* WHERE...Blue Mountains of Oregon and Washington, Wallowa County,
  Ochoco-John Day Highlands, Simcoe Highlands, and Lower Slopes of
  the Eastern Washington Cascades Crest.

* WHEN...Until 10 PM PDT Friday.

* IMPACTS...Hot temperatures may cause heat illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

For sheltering information and other human services in your area,
dial 2 1 1 during business hours or visit 211info.org for Oregon or
wa211.org for Washington anytime.

&&

$$

PDT