US 12 RoadWatcher

2 NWS alerts along US 12: Dense Fog Advisory

3states

0 of 13snowing now

2NWS alerts

17 of 19Montana DOT segments clear

28°Fcoldest: White Pass Summit, WA

6,332 fthighest camera: MacDonald Pass, MT

Weather as of 8:28 am MT, updated every 20 minutes.

Weather alerts along US 12

Dense Fog Advisory until Sun Nov 1, 12:00 pm MT · near Government Hill, MT and Ingomar, MT
Dense Fog Advisory until Sun Nov 1, 12:00 pm MT · near Lavina, MT

17 of 19 segments clear. JCT w US 89 to 35 Miles East of White Sulphur Springs: wet; Deep Creek Canyon to the JCT with US-89: wet.

No closures or incidents reported on US 12 in Montana.

4 lane, ramp or roadwork items

US-12 MP 9.6. Animals until further notice.
US-12 MP 12.0 to 23.4. Rock Fall Warning until further notice. WATCH FOR ROCKS ON ROAD.
US-12 MP 228.0 to 260.0. Road construction with Motorcycles consider alternate route, travel delay 10 mins, detour, flaggers, lane closures, speed limit 25 mph, and width limit 14 ft until 5:00 PM Friday, December 11, 2026. The road will cont...
US-12 MP 2.4 to 33.3. Height limit 15 ft, length limit 130 ft, and width limit 12 ft until further notice.

Montana pass	Elev.	Air	Road surface	Wind	Visibility
MacDonald PassUS-12 MP 27.9	6,320 ft	32°F	–	4–5 mph	–

Montana road data from 511MT, as of 8:22 am MT.

Now 36–43°F, dry · 2 alerts

Road: clear on 17 of 19 DOT segments · 4 roadwork

Passes: MacDonald Pass (6,332 ft)

Now 37–47°F, rain at 2 · no alerts

Passes: Lolo Pass (5,266 ft)

Now 28–39°F, dry · no alerts

Passes: Alpowa Summit (2,772 ft), White Pass (4,478 ft)

Camera	MM	Elev.	Now	Temp	Wind
Government HillMT	14.2	3,156 ft	CloudyDense Fog Advisory	43°F	5 mph
IngomarMT	230	3,071 ft	FogDense Fog Advisory	41°F	5 mph
LavinaMT	146	3,530 ft	CloudyDense Fog Advisory	39°F	2 mph
Deep CreekMT	23.5	5,866 ft	Cloudy	36°F	1–8 mph
MacDonald PassMT	27.9	6,332 ft	Fog	36°F	7 mph
Lolo PassID	174.4	5,266 ft	Drizzle	37°F	6 mph
Upper LochsaID	172.8	4,865 ft	Light drizzle	39°F	4 mph
Pete King CreekID	98.7	1,506 ft	Cloudy	46°F	5 mph
KamiahID	64.5	1,234 ft	Cloudy	47°F	2 mph
Cottonwood CreekID	19.1	837 ft	Cloudy	47°F	4 mph
Main St and 21st StLewiston, ID		755 ft	Cloudy	46°F	4 mph
Alpowa SummitWA	413.4	2,772 ft	Cloudy	39°F	13–20 mph
White Pass SummitWA	151	4,478 ft	Clear	28°F	8 mph

Is it snowing on US 12 right now?: Not at any of the 13 camera spots on the map, though there is rain or showers at 2. As of 8:28 am MT.
Is US 12 open right now?: In Montana, 511MT reports no full closures.
Are there weather alerts on US 12?: 2 active: Dense Fog Advisory. See the list above.
Where is it coldest on US 12 right now?: White Pass Summit, WA at 28°F. Warmest is Kamiah, ID at 47°F.
What passes and summits does US 12 cross?: Alpowa Summit, WA (highest camera about 2,772 ft), Lolo Pass, ID (highest camera about 5,266 ft), MacDonald Pass, MT (highest camera about 6,332 ft), White Pass, WA (highest camera about 4,478 ft).
How many US 12 traffic cameras does JamJumper have?: 32, in Montana, Idaho and Washington, all on one page.
Where does this information come from?: Camera images come from each state's DOT. Weather is from Open-Meteo, updated every 20 minutes; alerts and forecast map layers are from the National Weather Service; radar from NOAA.

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