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More SNOW and COLDER Temperatures This Week November 21, 2010

Posted by mikeheard in Uncategorized.
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UPDATE 3pm Sunday:

Winter Storm Warnings just went up West of the divide along with east of the divide for all of SW Montana. ALL Mountain passes will be impacted with heavy snow and gusty winds from Monday morning through Tuesday evening.

Severe Winter Weather not only will continue to impact Montana Monday through Wednesday but much of the Western U.S. as well. Click on the map below for more information on region winter weather highlights, and read on for local weather impacts.

SW Montana East of the divide will bare the brunt of the next round of snow. There are Warnings up above 5,000′ and Advisories below 5,000′. Snowfall 6″-12″ or more for the mountain passes, valleys 3″-6″ for most but Bozeman and West Yellowstone could see 6″-12″ of valley snow Monday through Tuesday.

West of the divide, look for 2″-5″ of snow for Butte, Anaconda, Deer Lodge etc. with up to 6″ or more over the mountains.

Wind will increase during this time as well! SE Winds 10-20 with gusts 30mph are likely to increase late Monday into Tuesday. Wind Chill values will vary from -10 to -30 at times.


Winter Storm Warning

URGENT – WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
1218 PM MST SUN NOV 21 2010

MTZ007-220330-
/O.EXB.KMSO.WS.W.0031.101122T1200Z-101124T0000Z/
BUTTE/BLACKFOOT REGION-
1218 PM MST SUN NOV 21 2010

…WINTER STORM WARNING IN EFFECT FROM 5 AM MONDAY TO 5 PM MST
TUESDAY FOR MACDONALD AND HOMESTAKE PASSES AND THE HIGHWAY
12 CORRIDOR…

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WINTER
STORM WARNING FOR SNOW AND BLOWING SNOW FOR MACDONALD AND
HOMESTAKE PASSES AND THE HIGHWAY 12 CORRIDOR… WHICH IS IN EFFECT
FROM 5 AM MONDAY TO 5 PM MST TUESDAY.

* IMPACTS/TIMING: SNOW WILL BEGIN EARLY MONDAY MORNING BECOMING
MODERATE AT TIMES MONDAY AFTERNOON THROUGH TUESDAY. INCREASED
NORTHEAST TO EAST WINDS WILL REDUCED VISIBILITIES AND SNOW
COVERED ROADWAYS WILL MAKE TRAVEL DIFFICULT. HIGHWAY 12 AND
MCDONALD AND HOMESTAKE PASSES ARE EXPECTED TO SEE WHITEOUT
CONDITIONS AT TIMES.

* SNOW ACCUMULATIONS: TOTAL OF 6 TO 8 INCHES BY TUESDAY EVENING.

* WINDS: EAST WINDS 15 TO 25 MPH. THROUGH HIGHWAY 12… MCDONALD
AND HOMESTAKE PASSES…GUSTS UP TO 45 MPH. WINDS WILL CAUSE
BLOWING AND DRIFTING OF SNOW REDUCING VISIBILITIES WITH LOCAL
WHITEOUT CONDITIONS. IN ADDITION…BITTERLY COLD WIND CHILL
VALUES OF 20 BELOW ZERO TO 30 BELOW ZERO ARE EXPECTED MONDAY
THROUGH TUESDAY.

* LOCATIONS IMPACTED INCLUDE…HIGHWAY 12 GARRISON TO
ELLISTON…HOMESTAKE PASS…MACDONALD PASS

URGENT – WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREAT FALLS MT
508 AM MST SUN NOV 21 2010

…A DEEP ARCTIC UPPER LEVEL TROUGH…ACCOMPANIED BY A BROAD PLUME
OF PACIFIC MOISTURE…WILL MOVE FROM SOUTHWEST CANADA ACROSS THE
NORTHERN ROCKIES BETWEEN MONDAY MORNING AND TUESDAY EVENING.
ACCUMULATING SNOW IS EXPECTED WITH LIGHT AMOUNTS ACROSS NORTH
CENTRAL AND CENTRAL MONTANA AND HEAVIER AMOUNTS OVER THE HIGHER
TERRAIN OF CENTRAL MONTANA AND BOTH VALLEY AND MOUNTAIN LOCATIONS
IN SOUTHWEST MONTANA. ALSO…A BITTERLY COLD AIRMASS WILL PUSH
SOUTHWARD ON MONDAY AFTERNOON/EVENING…SETTING UP THE POSSIBILITY
FOR WIND CHILLS OF 20 TO 30 DEGREES BELOW ZERO MONDAY NIGHT INTO
TUESDAY OVER PORTIONS OF NORTH CENTRAL MONTANA…

MTZ050>054-212230-
/O.NEW.KTFX.WS.W.0016.101122T1200Z-101124T0700Z/
/O.NEW.KTFX.WW.Y.0040.101122T1200Z-101124T0700Z/
JUDITH BASIN-FERGUS-JEFFERSON-BROADWATER-MEAGHER-
INCLUDING THE FOLLOWING LOCATIONS…STANFORD…JUDITH GAP…
LEWISTOWN…LEWISTOWN DIVIDE…BOULDER…BOULDER HILL…
ELK PARK PASS…HOMESTAKE PASS…WHITEHALL…TOWNSEND…
WHITE SULPHUR SPRINGS
508 AM MST SUN NOV 21 2010

…WINTER STORM WARNING IN EFFECT FROM 5 AM MONDAY TO MIDNIGHT
MST TUESDAY NIGHT FOR ELEVATIONS ABOVE 5000 FEET…
…WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM MONDAY TO MIDNIGHT
MST TUESDAY NIGHT FOR ELEVATIONS BELOW 5000 FEET…

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A WINTER
STORM WARNING FOR ELEVATIONS ABOVE 5000 FEET FOR HEAVY SNOW…
WHICH IS IN EFFECT FROM 5 AM MONDAY TO MIDNIGHT MST TUESDAY
NIGHT. A WINTER WEATHER ADVISORY FOR ELEVATIONS BELOW 5000 FEET
HAS ALSO BEEN ISSUED. THIS WINTER WEATHER ADVISORY FOR ELEVATIONS
BELOW 5000 FEET FOR SNOW…IS IN EFFECT FROM 5 AM MONDAY TO
MIDNIGHT MST TUESDAY NIGHT.

* TIMING AND MAIN IMPACT: LIGHT SNOW WILL BEGIN MONDAY MORNING
WITH PERIODS OF MODERATE TO HEAVY SNOW POSSIBLE FROM MONDAY
EVENING THROUGH TUESDAY AFTERNOON.

* SNOW ACCUMULATIONS: NEW SNOWFALL ACCUMULATIONS OF 3 TO 6 INCHES ARE
EXPECTED FOR LOWER ELEVATIONS WITH 10 TO 14 INCHES IN THE
MOUNTAINS.

* WINDS AND VISIBILITY: OCCASIONAL WIND GUSTS OF 15 TO 25
MPH…MAINLY IN AND NEAR FAVORED CANYONS AND MOUNTAIN PASSES…WILL
CREATE VISIBILITIES OF LESS THAN ONE HALF MILE IN BLOWING AND
DRIFTING SNOW.

* OTHER IMPACTS: ROAD TRAVEL WILL BE DIFFICULT DUE TO THE MODERATE
TO HEAVY SNOW AND REDUCED VISIBILITIES.

* LOCATIONS AFFECTED INCLUDE: WHITE SULPHUR SPRINGS…
STANFORD…JUDITH GAP…LEWISTOWN…LEWISTOWN DIVIDE…
BOULDER…BOULDER HILL…ELK PARK PASS…HOMESTAKE PASS…
WHITEHALL…TOWNSEND

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST
THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF
YOU MUST…KEEP AN EXTRA FLASHLIGHT…FOOD…AND WATER IN YOUR
VEHICLE IN CASE OF AN EMERGENCY.

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.

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

&&

$$

URGENT – WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREAT FALLS MT
508 AM MST SUN NOV 21 2010

…A DEEP ARCTIC UPPER LEVEL TROUGH…ACCOMPANIED BY A BROAD PLUME
OF PACIFIC MOISTURE…WILL MOVE FROM SOUTHWEST CANADA ACROSS THE
NORTHERN ROCKIES BETWEEN MONDAY MORNING AND TUESDAY EVENING.
ACCUMULATING SNOW IS EXPECTED WITH LIGHT AMOUNTS ACROSS NORTH
CENTRAL AND CENTRAL MONTANA AND HEAVIER AMOUNTS OVER THE HIGHER
TERRAIN OF CENTRAL MONTANA AND BOTH VALLEY AND MOUNTAIN LOCATIONS
IN SOUTHWEST MONTANA. ALSO…A BITTERLY COLD AIRMASS WILL PUSH
SOUTHWARD ON MONDAY AFTERNOON/EVENING…SETTING UP THE POSSIBILITY
FOR WIND CHILLS OF 20 TO 30 DEGREES BELOW ZERO MONDAY NIGHT INTO
TUESDAY OVER PORTIONS OF NORTH CENTRAL MONTANA…

MTZ008-015-055-212230-
/O.NEW.KTFX.WS.W.0016.101122T1200Z-101124T0700Z/
BEAVERHEAD-MADISON-GALLATIN-
INCLUDING THE FOLLOWING LOCATIONS…BIG HOLE PASS…
CHIEF JOSEPH PASS…DILLON…MONIDA PASS…ENNIS…NORRIS HILL…
RAYNOLDS PASS…TWIN BRIDGES…BATTLE RIDGE PASS…BOZEMAN…
BOZEMAN PASS…TARGHEE PASS…WEST YELLOWSTONE
508 AM MST SUN NOV 21 2010

…WINTER STORM WARNING IN EFFECT FROM 5 AM MONDAY TO MIDNIGHT
MST TUESDAY NIGHT…

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A WINTER
STORM WARNING FOR HEAVY SNOW…WHICH IS IN EFFECT FROM 5 AM
MONDAY TO MIDNIGHT MST TUESDAY NIGHT.

* TIMING AND MAIN IMPACT: SNOW WILL BEGIN MONDAY MORNING WITH PERIODS
OF MODERATE TO HEAVY SNOW POSSIBLE FROM MONDAY EVENING THROUGH
TUESDAY AFTERNOON.

* SNOW ACCUMULATIONS: NEW SNOWFALL ACCUMULATIONS OF 7 TO 10 INCHES
ARE EXPECTED ACROSS VALLEY LOCATIONS WITH 15 TO 20 INCHES IN THE
MOUNTAINS.

* WINDS AND VISIBILITY: OCCASIONAL WIND GUSTS OF 15 TO 25
MPH…MAINLY IN AND NEAR FAVORED CANYONS AND MOUNTAIN PASSES…WILL
CREATE VISIBILITIES OF LESS THAN ONE HALF MILE IN BLOWING AND
DRIFTING SNOW.

* OTHER IMPACTS: SOME ROADWAYS MAY BECOME HAZARDOUS TO IMPASSIBLE
DUE TO DRIFTING SNOW AND REDUCED VISIBILITIES.

* LOCATIONS AFFECTED INCLUDE: BATTLE RIDGE PASS…BOZEMAN…
BOZEMAN PASS…TARGHEE PASS…WEST YELLOWSTONE…BIG HOLE
PASS…CHIEF JOSEPH PASS…DILLON…MONIDA PASS…ENNIS…
NORRIS HILL…RAYNOLDS PASS…TWIN BRIDGES.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST
THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF
YOU MUST…KEEP AN EXTRA FLASHLIGHT…FOOD…AND WATER IN YOUR
VEHICLE IN CASE OF AN EMERGENCY.

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

&&

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