Montana Department of Transportation

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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 KMSO 302055
WSWMSO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
255 PM MDT THU OCT 30 2014

IDZ006-009-010-MTZ002-006-007-043-312100-
/O.NEW.KMSO.WS.A.0007.141101T1800Z-141103T0000Z/
SOUTHERN CLEARWATER MOUNTAINS-WESTERN LEMHI COUNTY-
EASTERN LEMHI COUNTY-WEST GLACIER REGION-
BITTERROOT/SAPPHIRE MOUNTAINS-BUTTE/BLACKFOOT REGION-
POTOMAC/SEELEY LAKE REGION-
255 PM MDT THU OCT 30 2014

...WINTER STORM WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SUNDAY AFTERNOON...

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

* IMPACTS/TIMING: ACCUMULATING SNOW WILL MAKE FOR DIFFICULT TRAVEL
  OVER MOUNTAIN PASSES. HIGH ELEVATION VALLEYS IN SOUTHWEST
  MONTANA WILL ALSO RECEIVE ACCUMULATING SNOW IMPACTING TRAVEL. TIMING
  FOR THE MOST SIGNIFICANT SNOWFALL ACCUMULATIONS IS LATE SATURDAY
  AFTERNOON THROUGH EARLY SUNDAY AFTERNOON.

* SNOW ACCUMULATIONS: 4-8 INCHES ABOVE 4500 FEET, LOCALLY MORE IN
  THE HIGHER TERRAIN.
   
* LOCATIONS IMPACTED INCLUDE...DIXIE...HIGHWAY 12 LOWELL TO LOLO
  PASS...BANNOCK PASS...HIGHWAY 93 LOST TRAIL PASS TO
  GIBBONSVILLE...ESSEX...HIGHWAY 83 BIGFORK TO SWAN LAKE...MARIAS
  PASS...HIGHWAY 93 SULA TO LOST TRAIL PASS...LOLO
  PASS...BUTTE...GEORGETOWN LAKE...MACDONALD PASS...HIGHWAY 83
  SEELEY LAKE TO CONDON...I-90 DRUMMOND TO DEERLODGE.

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 302048
WSWTFX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREAT FALLS MT
248 PM MDT THU OCT 30 2014

MTZ008.015-044.046-048.050-052.055-311300-
/O.NEW.KTFX.WS.A.0009.141102T0000Z-141103T0600Z/
BEAVERHEAD-NORTHERN ROCKY MOUNTAIN FRONT-EASTERN GLACIER-HILL-
CASCADE-CHOUTEAU-CENTRAL AND SOUTHERN LEWIS AND CLARK-MADISON-
TOOLE-LIBERTY-EASTERN PONDERA-SOUTHERN ROCKY MOUNTAIN FRONT-
EASTERN TETON-JUDITH BASIN-JEFFERSON-BROADWATER-MEAGHER-GALLATIN-
INCLUDING THE FOLLOWING LOCATIONS...BIG HOLE PASS...
CHIEF JOSEPH PASS...DILLON...MONIDA PASS...BROWNING...
MARIAS PASS...CUT BANK...HAVRE...GREAT FALLS...KINGS HILL PASS...
BIG SANDY...FORT BENTON...FLESHER PASS...HELENA...LINCOLN...
MACDONALD PASS...ROGERS PASS...ENNIS...NORRIS HILL...
RAYNOLDS PASS...TWIN BRIDGES...SHELBY...CHESTER...CONRAD...
CHOTEAU...FAIRFIELD...STANFORD...BOULDER...BOULDER HILL...
ELK PARK PASS...HOMESTAKE PASS...WHITEHALL...TOWNSEND...
WHITE SULPHUR SPRINGS...BATTLE RIDGE PASS...BOZEMAN...
BOZEMAN PASS...TARGHEE PASS...WEST YELLOWSTONE
248 PM MDT THU OCT 30 2014

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

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

* TIMING AND MAIN IMPACT: A STRONG FALL STORM SYSTEM WILL AFFECT
  MUCH OF NORTH-CENTRAL AND SOUTHWEST MONTANA WITH PERIODS OF RAIN
  AND SNOW...HEAVY AT TIMES...SATURDAY EVENING THROUGH SUNDAY
  EVENING. RAIN FALLING AT LOWER ELEVATIONS SATURDAY NIGHT IS
  LIKELY TO CHANGE TO SNOW AT ALL ELEVATIONS EARLY SUNDAY MORNING.
  THE TIMING OF THIS CHANGE FROM RAIN TO SNOW WILL DETERMINE LOWER
  ELEVATION SNOW ACCUMULATION.

* SNOW ACCUMULATIONS: MOUNTAIN AREAS ABOVE 5500 FEET HAVE THE
  POTENTIAL FOR 5 TO 10 INCHES OF STORM TOTAL SNOWFALL...WITH
  ISOLATED AMOUNTS OVER ONE FOOT. LOCATIONS BELOW 5500 FEET COULD
  HAVE 1 TO 4 INCHES OF SNOW...DEPENDING ON THE TIMING AT WHICH
  RAIN CHANGES TO SNOW. SNOWFALL AMOUNTS GREATER THAN 4 INCHES
  COULD OCCUR OVER PORTIONS OF THE NORTH-CENTRAL PLAINS IF RAIN
  CHANGES TO SNOW EARLIER SATURDAY NIGHT.

* WINDS AND VISIBILITY: NORTH WINDS OF 10 TO 20 MPH ARE POSSIBLE
  AT LOWER ELEVATIONS...WHILE 20 TO 30 MPH WINDS ARE POSSIBLE IN
  THE MOUNTAINS. HEAVY WET SNOW COULD REDUCE VISIBILITY TO LESS
  THAN ONE-HALF MILE AT TIMES.

* OTHER IMPACTS: TRAVEL MAY BECOME DIFFICULT WHILE SNOW ACCUMULATES OVER
  AREA PASSES. BRIDGES MAY BECOME SNOW COVERED AND ICY AT ALL
  ELEVATIONS. HEAVY WET SNOW COULD CAUSE ISOLATED POWER OUTAGES.
  YOUNG LIVESTOCK MAY BE AT RISK OF EXPOSURE TO HYPOTHERMIA.

* LOCATIONS AFFECTED INCLUDE: CHOTEAU...CHESTER... WHITE SULPHUR
  SPRINGS...BOZEMAN...WEST YELLOWSTONE...STANFORD...BOULDER
  HILL...ELK PARK PASS...WHITEHALL...FORT BENTON... BROWNING...
  MARIAS PASS...HAVRE...CUT BANK...TOWNSEND...GREAT FALLS...KINGS
  HILL PASS...BIG HOLE PASS...DILLON...MONIDA PASS...HELENA...
  MACDONALD PASS...ROGERS PASS...NORRIS HILL...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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