Montana Department of Transportation

Main Content

Accidents and Incidents Report

Winter Storm Warning/Watch/Advisory

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Note:  Be sure to pay close attention to the date and time of each warning.    
This document contains all warnings in the state so please read the
complete document.
 
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WWUS45 KBYZ 192145
WSWBYZ

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE BILLINGS MT
245 PM MST FRI DEC 19 2014

MTZ067-202145-
/O.NEW.KBYZ.WS.A.0010.141221T0100Z-141222T1500Z/
ABSAROKA/BEARTOOTH MOUNTAINS-
INCLUDING THE LOCATIONS OF...COOKE CITY
245 PM MST FRI DEC 19 2014

...WINTER STORM WATCH IN EFFECT FROM SATURDAY EVENING THROUGH
MONDAY MORNING...

THE NATIONAL WEATHER SERVICE IN BILLINGS HAS ISSUED A WINTER
STORM WATCH...WHICH IS IN EFFECT FROM SATURDAY EVENING THROUGH
MONDAY MORNING. 

* TIMING...SNOW WILL DEVELOP SATURDAY EVENING. PERIODS OF HEAVY
  SNOWFALL WILL IMPACT THE WEST AND NORTHWEST FACING SLOPES OF THE
  BEARTOOTH AND ABSAROKA MOUNTAINS FROM SATURDAY NIGHT INTO EARLY
  MONDAY.

* IMPACTS...RECREATION IN THE HIGH COUNTRY WILL IMPACTED BY
  ACCUMULATING SNOWFALL AND GUSTY WINDS. AVALANCHE DANGER MAY ALSO
  INCREASE DUE TO THE HEAVY SNOWFALL.

* SNOW ACCUMULATION...10 TO 15 INCHES POSSIBLE.

* WINDS...GUSTS TO 50 MPH ON THE EXPOSED SLOPES AND RIDGES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH IS ISSUED WHEN SEVERE WINTER WEATHER IS
POSSIBLE BUT NOT IMMINENT. AT THIS TIME THERE IS A POTENTIAL FOR
SIGNIFICANT SNOW. PLEASE MONITOR THE LATEST FORECASTS.

&&

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HTTP://WEATHER.GOV/BILLINGS


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WWUS45 KMSO 192220
WSWMSO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
320 PM MST FRI DEC 19 2014

...ATMOSPHERIC RIVER TO BRING HEAVY MOUNTAIN SNOW...

.AN ATMOSPHERIC RIVER WILL BRING A LOT OF MOISTURE TO THE NORTHERN
ROCKIES SATURDAY NIGHT AND SUNDAY. A LOT OF UNCERTAINTY REMAINS IN
THE SNOW LEVELS, HENCE THE WATCH INSTEAD OF ADVISORIES OR
WARNINGS. DUE TO THE HIGH PRECIPITATION RATES EXPECTED WITH THIS
EVENT, AN ERROR OF A FEW HOURS IN THE TIMING OF THE RISING SNOW
LEVELS WILL LEAD TO A BIG DIFFERENCE IN THE ACTUAL SNOWFALL. THE
WATCHES WILL BE TRANSITIONED TO WARNINGS OR ADVISORIES AS
WARRANTED WHEN CONFIDENCE IN THE SNOW LEVEL FORECAST INCREASES.

IDZ005-006-010-MTZ002-004-006-007-043-210100-
/O.NEW.KMSO.WS.A.0012.141221T0100Z-141222T1200Z/
NORTHERN CLEARWATER MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS-
EASTERN LEMHI COUNTY-WEST GLACIER REGION-LOWER CLARK FORK REGION-
BITTERROOT/SAPPHIRE MOUNTAINS-BUTTE/BLACKFOOT REGION-
POTOMAC/SEELEY LAKE REGION-
320 PM MST FRI DEC 19 2014

...WINTER STORM WATCH IN EFFECT FROM SATURDAY EVENING THROUGH
LATE SUNDAY NIGHT...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER
STORM WATCH...WHICH IS IN EFFECT FROM SATURDAY EVENING THROUGH
LATE SUNDAY NIGHT. 

* IMPACTS/TIMING: POTENTIAL FOR HEAVY WET SNOW TO IMPACT AREA
  PASSES SATURDAY NIGHT THROUGH SUNDAY. HEAVY SNOW FOLLOWED BY
  RAIN COULD MAKE MOUNTAIN ROADS VERY DIFFICULT OR DANGEROUS TO
  TRAVEL ON AT TIMES. LOOKOUT, LOLO, AND LOST TRAIL PASSES WILL
  MOST LIKELY BE IMPACTED, WITH IMPACTS ALSO POSSIBLE AT
  HOMESTAKE, MCDONALD, AND MARIAS PASSES. MANY HIGHER ELEVATION
  LOCATIONS SUCH AS ELK CITY, DIXIE, AND GILMORE SUMMIT IN CENTRAL
  IDAHO, AND GEORGETOWN LAKE AND SEELEY LAKE IN MONTANA COULD
  RECEIVE SEVERAL INCHES OF SNOW ALSO.

* SNOW ACCUMULATIONS: LOOKOUT, LOLO, AND LOST TRAIL PASSES WILL BE
  MOST IMPACTED WITH POTENTIAL SNOW ACCUMULATIONS 6 - 12 INCHES IN
  24 HOURS. HOMESTAKE, MCDONALD, AND MARIAS PASSES COULD
  POTENTIALLY HAVE 2 - 8 INCHES IN 24 HOURS.

* LOCATIONS IMPACTED INCLUDE...DIXIE...ELK CITY...BANNOCK PASS...
   HIGHWAY 28 TENDOY TO LONE PINE...HIGHWAY 93 LOST TRAIL PASS 
  TO GIBBONSVILLE...LEMHI PASS...BAD ROCK CANYON...ESSEX...
  HIGHWAY 83 BIGFORK TO SWAN LAKE...MARIAS PASS...POLEBRIDGE...
  EVARO HILL... I-90 LOOKOUT PASS TO HAUGAN...HIGHWAY 93 SULA TO 
  LOST TRAIL PASS...LOLO PASS...BUTTE...GEORGETOWN LAKE...
  HIGHWAY 12 GARRISON TO ELLISTON...HOMESTAKE PASS...MACDONALD 
  PASS...HIGHWAY 83 SEELEY LAKE TO CONDON...I-90 EAST MISSOULA 
  TO BEARMOUTH

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.

&&

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WWUS45 KTFX 192151
WSWTFX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREAT FALLS MT
251 PM MST FRI DEC 19 2014

A MOIST PACIFIC WEATHER SYSTEM WILL BRING HEAVY MOUNTAIN SNOW AND
MIXED PRECIPITATION AT LOWER ELEVATIONS SATURDAY NIGHT THROUGH
EARLY MONDAY. TRAVEL OVER MOUNTAIN PASSES WILL BECOME DIFFICULT ON
SUNDAY WITH SNOW COVERED AND ICY ROADS. STRONG WINDS WILL IN SOME
AREAS WILL CAUSE REDUCED VISIBILITY AND ADDITIONAL DIFFICULTY FOR
HIGH PROFILE VEHICLES.

MTZ009-014-048-052-201300-
/O.NEW.KTFX.WW.Y.0054.141221T0000Z-141222T1200Z/
NORTHERN ROCKY MOUNTAIN FRONT-
CENTRAL AND SOUTHERN LEWIS AND CLARK-
SOUTHERN ROCKY MOUNTAIN FRONT-JEFFERSON-
INCLUDING THE FOLLOWING LOCATIONS...MARIAS PASS...FLESHER PASS...
MACDONALD PASS...ROGERS PASS...BOULDER HILL...ELK PARK PASS...
HOMESTAKE PASS
251 PM MST FRI DEC 19 2014

...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM SATURDAY TO 5 AM
MST MONDAY FOR ELEVATIONS ABOVE 5000 FEET...

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A WINTER
WEATHER ADVISORY FOR ELEVATIONS ABOVE 5000 FEET FOR SNOW AND
BLOWING SNOW... WHICH IS IN EFFECT FROM 5 PM SATURDAY TO 5 AM MST
MONDAY.

* TIMING AND MAIN IMPACT: SNOW WILL DEVELOP OVER THE ROCKY
  MOUNTAINS SATURDAY NIGHT AND CONTINUE THROUGH EARLY MONDAY. THE
  AXIS OF HEAVIEST SNOWFALL WILL GRADUALLY SHIFT FROM NORTH TO
  SOUTH.

* SNOW ACCUMULATIONS: 3 TO 6 INCHES OF SNOW ARE EXPECTED OVER
  MOUNTAIN PASSES WITH 10 TO 20 INCHES POSSIBLE ABOVE PASS LEVEL.
  SNOW ACCUMULATION MAY BE REDUCED FURTHER SOUTH AS SNOW LEVELS
  RISE ON SUNDAY AFTERNOON.

* WINDS AND VISIBILITY: WIND GUSTS UP TO 60 MPH WILL PEAK EARLY
  SUNDAY THROUGH FAVORED AREAS ALONG THE ROCKY MOUNTAIN FRONT.
  VISIBILITY COULD DROP BELOW 1/2 MILE AT TIMES IN BLOWING SNOW.

* ELEVATIONS: FOR ELEVATIONS ABOVE 5000 FEET.

* LOCATIONS AFFECTED INCLUDE: MARIAS PASS...BOULDER HILL...ELK 
  PARK PASS...HOMESTAKE PASS...FLESHER PASS...MACDONALD PASS... 
  ROGERS PASS. 

* TO SEE A GRAPHICAL REPRESENTATION OF THIS HAZARD PLEASE VISIT
  OUR WEB PAGE AND CLICK ON THE DETAILED HAZARDS TAB.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT
VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND
BLOWING SNOW. USE CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN
AREAS.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

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MTZ008-015-055-201300-
/O.NEW.KTFX.WS.A.0013.141221T0000Z-141222T1200Z/
BEAVERHEAD-MADISON-GALLATIN-
INCLUDING THE FOLLOWING LOCATIONS...BIG HOLE PASS...
CHIEF JOSEPH PASS...MONIDA PASS...RAYNOLDS PASS...
BATTLE RIDGE PASS...TARGHEE PASS...WEST YELLOWSTONE
251 PM MST FRI DEC 19 2014

...WINTER STORM WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
LATE SUNDAY NIGHT FOR ELEVATIONS ABOVE 6000 FEET...

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A WINTER
STORM WATCH FOR ELEVATIONS ABOVE 6000 FEET...WHICH IS IN EFFECT
FROM SATURDAY AFTERNOON THROUGH LATE SUNDAY NIGHT. 

* TIMING AND MAIN IMPACT: SNOW WILL DEVELOP OVER SOUTHWEST MONTANA
  LATE SATURDAY AND CONTINUE THROUGH MONDAY. TRAVEL MAY BECOME
  DIFFICULT OVER MOUNTAIN PASSES WITH SNOW COVERED AND ICY ROADS.

* SNOW ACCUMULATIONS: 4 TO 8 INCHES OF SNOW ARE POSSIBLE OVER
  MOUNTAIN PASSES...WITH UP TO 2 FEET OF SNOW POSSIBLE OVER THE
  MOUNTAINS.

* ELEVATIONS: FOR ELEVATIONS ABOVE 6000 FEET.

* LOCATIONS AFFECTED INCLUDE: BATTLE RIDGE PASS...TARGHEE PASS...
  WEST YELLOWSTONE...BIG HOLE PASS...CHIEF JOSEPH PASS...MONIDA 
  PASS...RAYNOLDS PASS. 

* TO SEE A GRAPHICAL REPRESENTATION OF THIS HAZARD PLEASE VISIT
  OUR WEB PAGE AND CLICK ON THE DETAILED HAZARDS TAB.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.

&&

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