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Winter Weather Advisory


URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE BOISE ID
249 PM MST SAT DEC 20 2014

.A STRONG PACIFIC STORM WILL CONTINUE TO BRING MODERATE TO HEAVY
PRECIPITATION TO SOUTHEAST OREGON AND SOUTHWEST IDAHO THIS
WEEKEND. THE SNOW LEVEL WILL RISE SHARPLY TONIGHT AND
PRECIPITATION WILL BECOME ALL RAIN BELOW 7000 FEET MSL BY MIDNIGHT
MST TONIGHT. MOUNTAIN VALLEYS WILL SEE 1 TO 4 INCHES OF SNOW
BEFORE THE CHANGEOVER TO RAIN.

IDZ011-210600-
/O.CON.KBOI.WW.Y.0015.000000T0000Z-141221T0600Z/
WEST CENTRAL MOUNTAINS-
249 PM MST SAT DEC 20 2014

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER WEATHER ADVISORY FOR SNOW IN THE WEST-CENTRAL IDAHO MOUNTAINS
REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING.

* SNOW AMOUNTS...2 TO 4 INCHES IN THE VALLEYS. UP TO ONE FOOT
  THROUGH MIDNIGHT ACROSS HIGHER PEAKS WITH ADDITIONAL
  ACCUMULATIONS AFTER MIDNIGHT.

* SNOW LEVELS...4500 FEET MSL...RISING TO 7000 FEET BY MIDNIGHT.

* TIMING...THROUGH THIS EVENING BEFORE CHANGING TO RAIN.

* IMPACTS...SNOW-COVERED ROADS MAKING DRIVING DIFFICULT...ESPECIALLY
  ALONG HIGHWAY 55 NORTH OF SMITHS FERRY AND WARM LAKE ROAD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL PRIMARILY CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE ELKO NV
212 PM PST SAT DEC 20 2014


NVZ031-211015-
/O.CON.KLKN.WW.Y.0021.000000T0000Z-141223T0000Z/
NORTHERN ELKO COUNTY-
212 PM PST SAT DEC 20 2014

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST
MONDAY...

A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW ABOVE 6500
FEET REMAINS IN EFFECT UNTIL 4 PM PST
MONDAY.

* SNOW ACCUMULATIONS: ADDITIONAL ACCUMULATIONS OF 4 TO 12 INCHES
  CAN BE EXPECTED THROUGH MONDAY. LOCALLY HIGHER ACCUMULATIONS OF
  12-18 INCHES POSSIBLE ON FAVORED MOUNTAINS AND NORTHWEST FACING
  SLOPES.

* TIMING: THE HEAVIEST SNOW IS EXPECTED THROUGH MIDDAY SUNDAY.
  THE STRONGEST WINDS ARE EXPECTED SUNDAY INTO MONDAY.

* OTHER IMPACTS: TRAVEL TO THE HIGHER TERRAIN WILL BECOME
  DIFFICULT BEGINNING LATE SATURDAY. HEAVY SNOW AND BLOWING
  SNOW WILL MAKE TRAVEL VERY DIFFICULT...AND OUTDOOR
  RECREATION DANGEROUS...SATURDAY NIGHT THROUGH SUNDAY
  MORNING. SNOW AND STRONG WEST TO NORTHWEST WINDS WILL
  CONTINUE SUNDAY AND MONDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT TRAVEL DIFFICULTIES ARE
EXPECTED DUE TO WINTRY CONDITIONS. BE PREPARED FOR SLIPPERY ROADS
AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. FOR THE
LATEST ROAD CONDITIONS CALL 511 OR VISIT WWW.NVROADS.COM.

&&

$$

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREAT FALLS MT
1139 AM MST SAT DEC 20 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.

MTZ008-015-055-210645-
/O.UPG.KTFX.WS.A.0013.141221T0000Z-141222T1200Z/
/O.EXB.KTFX.WW.Y.0054.141221T0200Z-141222T1200Z/
BEAVERHEAD-MADISON-GALLATIN-
INCLUDING THE FOLLOWING LOCATIONS...BIG HOLE PASS...
CHIEF JOSEPH PASS...MONIDA PASS...RAYNOLDS PASS...
BATTLE RIDGE PASS...BOZEMAN PASS...TARGHEE PASS...
WEST YELLOWSTONE
1139 AM MST SAT DEC 20 2014

...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO
5 AM MST MONDAY FOR ELEVATIONS ABOVE 5500 FEET...

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A WINTER
WEATHER ADVISORY FOR ELEVATIONS ABOVE 5500 FEET FOR SNOW AND BLOWING
SNOW...WHICH IS IN EFFECT FROM 7 PM THIS EVENING TO 5 AM MST
MONDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT.

* TIMING AND MAIN IMPACT: SNOW WILL DEVELOP OVER SOUTHWEST
  MONTANA LATE TONIGHT 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 20 INCHES OF SNOW POSSIBLE OVER
  THE MOUNTAINS.

* ELEVATIONS: FOR ELEVATIONS ABOVE 5500 FEET.

* LOCATIONS AFFECTED INCLUDE: BATTLE RIDGE PASS...BOZEMAN
  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 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.

&&

$$

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
1028 AM MST SAT DEC 20 2014

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

.AN ATMOSPHERIC RIVER WILL BRING ABUNDANT MOISTURE TO THE
NORTHERN ROCKIES TONIGHT THROUGH LATE SUNDAY WITH PERIODS OF
MODERATE TO HEAVY MOUNTAIN PASS SNOWFALL. SNOW LEVELS WILL
INITIALLY BEGIN AS LOW AS 3000 FT THIS AFTERNOON THEN GRADUALLY
RISE TO NEAR 5000 FEET ON SUNDAY MORNING AND UP TO 6000 FEET ON
SUNDAY AFTERNOON...THUS SNOW WILL CHANGE OVER RAIN OR A RAIN AND
SNOW MIX FOR MANY LOWER ELEVATION PASSES ON SUNDAY MORNING.
PRECIPITATION WILL BECOME MORE SHOWERY ON SUNDAY NIGHT BUT WILL
CONTINUE FOR MANY LOCATIONS.

IDZ009-211200-
/O.NEW.KMSO.WW.Y.0072.141220T2200Z-141222T1200Z/
WESTERN LEMHI COUNTY-
1028 AM MST SAT DEC 20 2014

...WINTER WEATHER ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO
5 AM MST MONDAY ABOVE 4000 FEET...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW AND SLICK ROADS ABOVE 4000 FEET...
WHICH IS IN EFFECT FROM 3 PM THIS AFTERNOON TO 5 AM MST MONDAY.

* IMPACTS/TIMING:HEAVY WET SNOW TO IMPACT AREA MOUNTAINS TONIGHT
  THROUGH LATE SUNDAY. HEAVY SNOW FOLLOWED BY RAIN COULD MAKE
  MOUNTAIN ROADS VERY DIFFICULT OR DANGEROUS TO TRAVEL ON AT
  TIMES.

* SNOW ACCUMULATIONS: HIGHER ELEVATIONS SUCH AS WILLIAMS CREEK
  SUMMIT WILL BE MOST IMPACTED WITH SNOW ACCUMULATIONS 6-12 INCHES
  IN 24 HOURS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...


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
DRIVING.

&&

$$

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
1028 AM MST SAT DEC 20 2014

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

.AN ATMOSPHERIC RIVER WILL BRING ABUNDANT MOISTURE TO THE
NORTHERN ROCKIES TONIGHT THROUGH LATE SUNDAY WITH PERIODS OF
MODERATE TO HEAVY MOUNTAIN PASS SNOWFALL. SNOW LEVELS WILL
INITIALLY BEGIN AS LOW AS 3000 FT THIS AFTERNOON THEN GRADUALLY
RISE TO NEAR 5000 FEET ON SUNDAY MORNING AND UP TO 6000 FEET ON
SUNDAY AFTERNOON...THUS SNOW WILL CHANGE OVER RAIN OR A RAIN AND
SNOW MIX FOR MANY LOWER ELEVATION PASSES ON SUNDAY MORNING.
PRECIPITATION WILL BECOME MORE SHOWERY ON SUNDAY NIGHT BUT WILL
CONTINUE FOR MANY LOCATIONS.

IDZ005-006-010-MTZ004-211200-
/O.UPG.KMSO.WS.A.0012.141221T0100Z-141222T1200Z/
/O.NEW.KMSO.WW.Y.0072.141220T2200Z-141222T1200Z/
NORTHERN CLEARWATER MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS-
EASTERN LEMHI COUNTY-LOWER CLARK FORK REGION-
1028 AM MST SAT DEC 20 2014

...WINTER WEATHER ADVISORY IN EFFECT FROM 3 PM MST /2 PM PST/
THIS AFTERNOON TO 5 AM MST /4 AM PST/ MONDAY ABOVE 4000 FEET...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW AND SLICK ROADS ABOVE 4000 FEET...
WHICH IS IN EFFECT FROM 3 PM MST /2 PM PST/ THIS AFTERNOON TO 5 AM
MST /4 AM PST/ MONDAY. THE WINTER STORM WATCH IS NO LONGER IN
EFFECT.

* * IMPACTS/TIMING: HEAVY WET SNOW TO IMPACT AREA PASSES TONIGHT
  THROUGH LATE 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. MANY HIGHER ELEVATION LOCATIONS SUCH AS ELK CITY...
  DIXIE... AND GILMORE SUMMIT IN CENTRAL IDAHO MAY RECEIVE
  SEVERAL INCHES OF SNOW ALSO.

* SNOW ACCUMULATIONS: LOOKOUT... LOLO... AND LOST TRAIL PASSES
  WILL BE MOST IMPACTED WITH EXPECTED SNOW ACCUMULATIONS OF 6-12
  INCHES IN 24 HOURS. ELK CITY... DIXIE... AND GILMORE SUMMIT MAY
  ALSO RECEIVE 3-6 INCHES IN 24 HOURS. PORTIONS OF THE SALMON
  RIVER VALLEY MAY ALSO SEE A SLUSHY INCH OR TWO OF SNOW MAINLY
  TONIGHT.

* LOCATIONS IMPACTED INCLUDE...DIXIE...ELK CITY...BANNOCK PASS...
   HIGHWAY 28 TENDOY TO LONE PINE...HIGHWAY 93 LOST TRAIL PASS
  TO GIBBONSVILLE...LEMHI PASS...EVARO HILL

PRECAUTIONARY/PREPAREDNESS ACTIONS...


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
DRIVING.

&&

$$

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
1028 AM MST SAT DEC 20 2014

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

.AN ATMOSPHERIC RIVER WILL BRING ABUNDANT MOISTURE TO THE
NORTHERN ROCKIES TONIGHT THROUGH LATE SUNDAY WITH PERIODS OF
MODERATE TO HEAVY MOUNTAIN PASS SNOWFALL. SNOW LEVELS WILL
INITIALLY BEGIN AS LOW AS 3000 FT THIS AFTERNOON THEN GRADUALLY
RISE TO NEAR 5000 FEET ON SUNDAY MORNING AND UP TO 6000 FEET ON
SUNDAY AFTERNOON...THUS SNOW WILL CHANGE OVER RAIN OR A RAIN AND
SNOW MIX FOR MANY LOWER ELEVATION PASSES ON SUNDAY MORNING.
PRECIPITATION WILL BECOME MORE SHOWERY ON SUNDAY NIGHT BUT WILL
CONTINUE FOR MANY LOCATIONS.

MTZ002-006-007-043-211200-
/O.UPG.KMSO.WS.A.0012.141221T0100Z-141222T1200Z/
/O.NEW.KMSO.WW.Y.0072.141221T0200Z-141222T1200Z/
WEST GLACIER REGION-BITTERROOT/SAPPHIRE MOUNTAINS-
BUTTE/BLACKFOOT REGION-POTOMAC/SEELEY LAKE REGION-
1028 AM MST SAT DEC 20 2014

...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO
5 AM MST MONDAY...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW AND SLICK ROADS...WHICH IS IN EFFECT
FROM 7 PM THIS EVENING TO 5 AM MST MONDAY. THE WINTER STORM WATCH
IS NO LONGER IN EFFECT.

* * IMPACTS/TIMING: HEAVY WET SNOW WILL IMPACT AREA PASSES THIS
  EVENING THROUGH LATE SUNDAY. HEAVY SNOW FOLLOWED BY RAIN COULD
  MAKE MOUNTAIN ROADS VERY DIFFICULT OR DANGEROUS TO TRAVEL ON AT
  TIMES. 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 GEORGETOWN LAKE AND SEELEY LAKE MAY RECEIVE SEVERAL
  INCHES OF SNOW ALSO.

* SNOW ACCUMULATIONS: LOLO AND LOST TRAIL PASSES WILL BE MOST
  IMPACTED WITH EXPECTED SNOW ACCUMULATIONS OF 6-12 INCHES IN 24
  HOURS. HOMESTAKE... MCDONALD... AND MARIAS PASSES SHOULD SEE 2-8
  INCHES IN 24 HOURS.

* LOCATIONS IMPACTED INCLUDE...BAD ROCK CANYON...ESSEX...HIGHWAY
  83 BIGFORK TO SWAN LAKE...MARIAS PASS...POLEBRIDGE...HIGHWAY
  93 SULA TO LOST TRAIL PASS...LOLO PASS...BUTTE...GEORGETOWN
  LAKE...HIGHWAY 12 GARRISON TO ELLISTON...HOMESTAKE PASS...
  MACDONALD PASS...HIGHWAY 200 BONNER TO GREENOUGH...HIGHWAY 83
  SEELEY LAKE TO CONDON...I-90 EAST MISSOULA TO BEARMOUTH

PRECAUTIONARY/PREPAREDNESS ACTIONS...


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
DRIVING.

&&

$$

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
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