Dense Fog Advisory

URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
556 AM PST Mon Nov 17 2025

WAZ027-171800-
/O.NEW.KPDT.FG.Y.0011.251117T1356Z-251117T1800Z/
Yakima Valley-
Including the cities of Yakima, Sunnyside, Toppenish, and Naches
556 AM PST Mon Nov 17 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM PST THIS MORNING...

* WHAT...Visibility a quarter to a half mile in dense fog.

* WHERE...Yakima Valley.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...Low visibility could make driving conditions hazardous.

* ADDITIONAL DETAILS...Low visibility may impact travel along
  Interstate 82 between Union Gap and Prosser, where the lowest
  visibilities have been observed.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.

&&

$$

BL

Special Weather Statement

Special Weather Statement
National Weather Service Pendleton OR
614 AM PST Mon Nov 17 2025

ORZ044-171700-
Lower Columbia Basin of Oregon-
Including the cities of Boardman, Hermiston, and Ione
614 AM PST Mon Nov 17 2025

Patchy dense fog has developed across portions of the Lower
Columbia Basin in Oregon this morning, with visibilities as low as
a quarter mile. Reduced visibility will continue to impact the
Hermiston area, as well as sections of Interstate 84 and US 395
through this morning.

$$

Special Weather Statement
National Weather Service Pendleton OR
317 AM PST Mon Nov 17 2025

WAZ028-171700-
Lower Columbia Basin of Washington-
Including the cities of Connell, Prosser, and Tri-Cities
317 AM PST Mon Nov 17 2025

Patchy dense fog has developed across portions of the Lower
Columbia Basin in Washington tonight, with visibilities between a
quarter mile to a mile being reported. Reduced visibility will
continue to impact the Tri-Cities and areas to the north, as well
as along portions of I-82 and US-395 through this morning.

$$