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Winter Weather Advisory

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 THE WINTER STORM WATCH IS NO LONGER IN
EFFECT.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.

&&

$$



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Page last modified: May 16, 2007
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