Updated: 8:00 AM MST on December 21, 2014
Overcast with snow and a chance of rain, then rain showers in the afternoon. High of 39F with a windchill as low as 27F. Breezy. Winds from the West at 10 to 20 mph. Chance of precipitation 90% .
Mostly cloudy with snow. Low of 27F. Winds from the SSW at 5 to 10 mph. Chance of snow 90%.
Overcast with a chance of snow in the morning, then mostly cloudy with a chance of snow. High of 32F with a windchill as low as 23F. Winds from the WNW at 5 to 10 mph. Chance of snow 50% with accumulations up to 1 in. possible.
Partly cloudy. Fog overnight. Low of 16F. Winds less than 5 mph.
Partly cloudy. Fog early. High of 34F. Winds less than 5 mph.
Partly cloudy. Low of 21F with a windchill as low as 12F. Winds from the SSW at 5 to 10 mph.
Mostly cloudy with a chance of snow and rain showers in the afternoon. Fog early. High of 39F with a windchill as low as 18F. Winds from the SSW at 5 to 10 mph. Chance of snow 20%.
Overcast with a chance of snow. Low of 21F. Winds from the West at 5 to 15 mph. Chance of snow 60% with accumulations up to 3 in. possible.
Overcast with a chance of snow in the morning, then mostly cloudy. High of 27F. Winds from the WNW at 5 to 10 mph. Chance of snow 20%.
Partly cloudy. Low of 9F. Winds less than 5 mph.
Mostly cloudy. High of 21F. Winds less than 5 mph.
Partly cloudy. Low of 12F. Winds from the SSW at 5 to 10 mph.
Partly cloudy. High of 25F. Winds from the SW at 5 to 10 mph.
Mostly cloudy. Low of 9F. Winds less than 5 mph.
Partly cloudy. High of 25F. Winds less than 5 mph.
Partly cloudy. Low of 5F. Winds less than 5 mph.
Mostly cloudy. Fog early. High of 14F. Winds less than 5 mph.
Partly cloudy. Low of -4F. Winds less than 5 mph.
Clear. High of 14F. Winds less than 5 mph.
Clear. Low of 3F. Winds less than 5 mph.
Clear. Fog early. High of 16F. Winds less than 5 mph.
Clear. Fog overnight. Low of 3F. Winds less than 5 mph.
... Winter Weather Advisory remains in effect until 5 am MST /4 am
PST/ Monday above 4000 feet...
A Winter Weather Advisory above 4000 feet remains in effect until
5 am MST /4 am PST/ Monday.
* Impacts/timing:heavy snow will transition to snow showers by
this afternoon. Mountain roads will be very difficult or
dangerous to travel on at times especially Lolo and lost trail
passes and at Gilmore Summit.
* Additional snow accumulations: 4 to 6 inches at Lolo Pass... lost
trail passes and at the Williams Creek Summit. Gilmore Summit
could see an additional 1 to 3 inches.
A Winter Weather Advisory for snow means that periods of snow
will cause primarily travel difficulties. Be prepared for snow
covered roads and limited visibilities... and use caution while
Personal Weather Stations [Add your weather station!]
Location: RAWS SALMON ID US, Salmon, ID
Updated: 7:36 AM MST
|Temperature: 37 °F||Dew Point: 36 °F||Humidity: 95%||Wind: SW at 5 mph||Pressure: -||Hourly Precipitation: 0.04 in||Windchill: 33 °F||Graphs|
Location: RAWS KRILEY CREEK ID US, North Fork, ID
Updated: 7:51 AM MST
|Temperature: 33 °F||Dew Point: 33 °F||Humidity: 100%||Wind: WNW at 3 mph||Pressure: -||Hourly Precipitation: 0.06 in||Windchill: 33 °F||Graphs|
Location: RAWS EZRA CREEK ID US, Ellis, ID
Updated: 7:26 AM MST
|Temperature: 32 °F||Dew Point: 32 °F||Humidity: 98%||Wind: SW at 11 mph||Pressure: -||Hourly Precipitation: 0.00 in||Windchill: 23 °F||Graphs|
MSN Maps of:
|Temp:||Dew Point:||Humidity||Wind||Pressure||Hr Precip||-|
Area forecast discussion National Weather Service Missoula Montana 418 am MST sun Dec 21 2014 ..difficult travel over mountain passes expected today... ..Possible winter storm Christmas evening day into Christmas... Discussion...the moist weather system continues to bring a variety of impacts today. So far several locations have kept enough cold air in place to keep the precipitation type as all snow...Highway 83 from Seeley Lake south to Highway 200 including Greenough hill all the way to Bonner have experienced at least 4 inches early this morning. Snow has also been observed near Bull Lake, along US-2 from Libby to Marion and also 2 to 4" has fallen near Olney north of Whitefish. It's difficult to tell, but Lookout Pass has probably seen at least 6" of snow so far with snow- covered roads. The Camas Prairie and Grangeville area has been experiencing strong gusty winds to 50 mph this morning and winds there are expected to weaken somewhat towards daybreak. Expect the steady precipitation to transition to showers today. Strong mid- level winds near 50 mph may be able to mix down across portions of southwest Montana especially along Montana-141 north of Avon, MacDonald Pass on US-12 this afternoon. These dangerous cross-winds could impact high profile vehicles in these areas. High pressure will build over the region Monday and Tuesday. A few snow showers are expected each day. The biggest impact from this ridge will be the potential for fog Monday morning and more likely Tuesday morning. The ridge will be short lived as a long advertised low pressure system will move through the region Christmas eve and much of Christmas day. For several days there has been considerable uncertainty for timing and strength of this system. It appears that models are coming into some agreement regarding timing of this storm. This system will first impact northwest Montana Wednesday afternoon then slide southward impacting central Idaho, west central and southwest Montana Wednesday evening through Christmas afternoon. Timing for the best potential for heaviest precipitation will be Wednesday evening through midday Christmas. How much snow will fall over the area?? much of this question depends on snow levels and where the heaviest boundary of precip forms. Snow levels will start off fairly low impacting all mountains and passes with travel concerns. The big question is when will snow levels fall to the valley floors. Models are coming into agreement that snow levels will crash to the valley floors late Wednesday evening and overnight. Most valley locations should wake up to snowfall on Christmas morning. Conservative snowfall amounts show anywhere from 4-8 inches in the mountains and 2-4 inches in the valleys. This could change considerably depending on where the precip boundary sets up, when snow levels lower (for valleys) and how long it lingers over an area. It would not be surprising if amounts are higher increasing travel impacts for Christmas eve and day. Stay tuned to subsequent forecast for better timing and location for this system. Late this week and next weekend high pressure develops off the West Coast leaving the region in a northerly flow aloft. Expect scattered snow showers each day with slightly below normal temperatures. && Aviation...as the steady precipitation turns to showers by late this morning there will be some improvement with ceilings and visibility. Gusty winds will develop as the atmosphere becomes unstable today. Strong gusts near 40 knots are possible near the Continental Divide especially from between Helmville and Avon south to kbtm this afternoon. Numerous snow showers will be expected through Monday across the Clearwater, Bitterroot, Flint to Anaconda ranges and from the mission mtns. To Glacier National Park...so expect lower ceilings and visibility reductions. && Mso watches/warnings/advisories... Montana...Winter Weather Advisory until 5 am MST Monday above 4000 feet for the Lower Clark Fork region. Winter Weather Advisory until 5 am MST Monday Bitterroot/Sapphire Mountains...Butte/Blackfoot region... Potomac/Seeley Lake region...West Glacier region. Idaho...Winter Weather Advisory until 5 am MST /4 am PST/ Monday above 4000 feet for the eastern Lemhi County...northern Clearwater Mountains...southern Clearwater Mountains... western Lemhi County. Wind Advisory until 7 am PST this morning Orofino/Grangeville region. && $$