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Dense Fog Advisory


URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
1253 PM PST Wed Dec 3 2025

ORZ507-WAZ029-040700-
/O.EXT.KPDT.FG.Y.0015.000000T0000Z-251204T1900Z/
Foothills of the Northern Blue Mountains of Oregon-Foothills of
the Blue Mountains of Washington-
Including the cities of Dayton, Pilot Rock, Athena, Pendleton,
Walla Walla, and Waitsburg
1253 PM PST Wed Dec 3 2025

...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 11 AM PST THURSDAY...

* WHAT...Visibilities from one and a half miles to less than a
  quarter mile in dense fog.

* WHERE...In Oregon, Foothills of the Northern Blue Mountains of
  Oregon. In Washington, Foothills of the Blue Mountains of
  Washington.

* WHEN...Until 11 AM PST Thursday.

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

* ADDITIONAL DETAILS...Fog will lift this afternoon, but is expected
  to redevelop across the area later this evening and overnight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$


Winter Storm Watch


URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
133 PM MST Wed Dec 3 2025

MTZ301-307-327-041200-
/O.NEW.KTFX.WS.A.0018.251205T1200Z-251207T0000Z/
East Glacier Park Region-Southern Rocky Mountain Front-Northwest
Beaverhead County-
Including the following locations: Babb, Saint Mary, East Glacier
Park, Big Hole Pass, Wisdom, Dewey, Logan Pass, Rogers Pass,
Chief Joseph Pass, Wise River, Marias Pass, and Kiowa
133 PM MST Wed Dec 3 2025

...WINTER STORM WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH
SATURDAY AFTERNOON...

* WHAT...Heavy snow possible. Total snow accumulations between 6 and
  12 inches possible. Winds could gust as high as 40 mph.

* WHERE...The Continental Divide along the Rocky Mountain Front, and
  Northwest Beaverhead County.

* WHEN...From late Thursday night through Saturday afternoon.

* IMPACTS...Travel could be very difficult and tire chains may be
  required for some vehicles. Those in the backcountry should ensure
  they are prepared for dangerous conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

Remember, a Winter Storm Watch means that there is at least a 50%
chance of impactful winter weather conditions during the watch
period.

&&

$$

Glinskas

URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
126 PM MST Wed Dec 3 2025

IDZ005-006-MTZ002-004-006-043-051200-
/O.NEW.KMSO.WS.A.0010.251205T1200Z-251207T0000Z/
Northern Clearwater Mountains-Southern Clearwater Mountains-West
Glacier Region-Lower Clark Fork Region-Bitterroot/Sapphire
Mountains-Potomac/Seeley Lake Region-
126 PM MST Wed Dec 3 2025 /1226 PM PST Wed Dec 3 2025/

...WINTER STORM WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH
SATURDAY AFTERNOON...

* WHAT...Heavy mixed precipitation possible. There is a chance of
  moderate to major winter weather impacts. Total snow accumulations
  of 3 to 7 inches along valley bottoms, 7 to 15 inches at mountain
  pass level, and 24 to 36 inches along mountain crests.  Ice
  accumulations around a light glaze possible.

* WHERE...In IDAHO, Northern Clearwater Mountains and Southern
  Clearwater Mountains. In MONTANA, West Glacier Region,
  Bitterroot/Sapphire Mountains, Lower Clark Fork Region, and
  Potomac/Seeley Lake Region.

* WHEN...From late Thursday night through Saturday afternoon.

* IMPACTS...Travel could be very difficult to impossible. The
  hazardous conditions could impact the Friday morning and evening
  commutes, especially over higher passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

&&

$$

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
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