Dense Fog Advisory

URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
1049 PM PST Wed Dec 3 2025

ORZ507-WAZ029-041900-
/O.CON.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, Athena, Pilot Rock, Pendleton,
Waitsburg, and Walla Walla
1049 PM PST Wed Dec 3 2025

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

* WHAT...Visibilities from one and a half miles to 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.

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
219 AM MST Thu Dec 4 2025

...SERIES OF WINTER STORMS TO AFFECT THE MOUNTAINS AND PASSES
THROUGH THE SATURDAY...

.A series of winter storms will begin to push into North Central and
Southwestern Montana today, with snow beginning over the higher
terrain early this afternoon. Today`s snowfall will focus on the
Mountains of Central and South-Central Montana, with 4 to 8 inches
over both Kings Hill and Bozeman Passes today, with higher amounts
above pass level. A period of lighter snowfall is expected Friday
morning and afternoon, with more widespread heavy snow returning to
the area around sunset Friday. Snow will continue across the area
Friday night into Saturday evening, with an additional 6 to 12
inches expected over the passes and higher amounts above pass level.

MTZ301-307-327-050030-
/O.CON.KTFX.WS.A.0018.251205T1200Z-251207T0000Z/
East Glacier Park Region-Southern Rocky Mountain Front-Northwest
Beaverhead County-
Including the following locations: Saint Mary, East Glacier Park,
Logan Pass, Kiowa, Marias Pass, Rogers Pass, Wisdom, Babb, Chief
Joseph Pass, Wise River, Big Hole Pass, and Dewey
219 AM MST Thu Dec 4 2025

...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TONIGHT 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 tonight 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.

&&

$$

Ludwig

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.

&&

$$