Winter Storm Warning 10, NWS Missoula, MT

179 
WWUS45 KMSO 161100
WSWMSO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
400 AM MST FRI DEC 16 2016

IDZ010-170000-
/O.CON.KMSO.WS.W.0010.161216T1200Z-161217T0000Z/
400 AM MST FRI DEC 16 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* IMPACTS/TIMING: LIGHT TO MODERATE SNOW WILL COMBINE WITH NORTH
  AND EAST WINDS CREATING BLOWING AND DRIFTING SNOW. TREACHEROUS
  CONDITIONS ARE LIKELY WITH AREAS OF VERY LOW TO ZERO VISIBILITY
  THIS MORNING THROUGH THE AFTERNOON ALONG HIGHWAY 93 AND HIGHWAY
  28. COLD WIND CHILL WILL DEVELOP BY LATER TODAY AS WELL.

* SNOW ACCUMULATIONS: 4 TO 6 INCHES.

* WIND CHILLS BY FRIDAY MORNING: NEGATIVE 10 TO NEGATIVE 20.

* LOCATIONS IMPACTED INCLUDE: BANNOCK PASS, HIGHWAY 28 TENDOY TO 
  LONE PINE, HIGHWAY 93 LOST TRAIL PASS TO GIBBONSVILLE, LEMHI 
  PASS, AND SALMON

$$

MTZ007-170000-
/O.CON.KMSO.WS.W.0010.000000T0000Z-161217T0000Z/
400 AM MST FRI DEC 16 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* IMPACTS/TIMING: AN ARCTIC FRONT CONTINUES TO SLIDE DOWN TODAY
  BRINGING ANOTHER ROUND OF SNOW, BREEZY WINDS, BLOWING SNOW, AND
  FRIGID TEMPERATURES TO THE AREA. THIS MORNING, WE ARE EXPECTING
  CONDITIONS TO TURN TREACHEROUS WITH LIGHT TO MODERATE SNOW AND 
  EXTREMELY LOW VISIBILITIES DUE TO THE COMBINATION OF WIND AND 
  SNOW. 

* SNOW ACCUMULATIONS: ADDITIONAL 1 TO 3 INCHES WITH LOCALLY HIGHER
  AMOUNTS TODAY.


* WIND CHILLS BY FRIDAY AFTERNOON: NEGATIVE 15 TO NEGATIVE 25.

* LOCATIONS IMPACTED INCLUDE: BUTTE, GEORGETOWN LAKE, HIGHWAY 12 
  GARRISON TO ELLISTON, HOMESTAKE PASS, AND MACDONALD PASS

$$

MTZ004-043-161800-
/O.CON.KMSO.WW.Y.0065.000000T0000Z-161216T1800Z/
400 AM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* IMPACTS/TIMING: NORTH AND EAST WINDS WILL CREATE BLOWING SNOW
  AND VERY COLD WIND CHILLS THROUGH THIS MORNING. 

* WIND CHILLS: NEGATIVE 15 TO NEGATIVE 25.

* LOCATIONS IMPACTED INCLUDE: EVARO HILL, HIGHWAY 200 THOMPSON 
  FALLS TO PLAINS, HIGHWAY 200 TROUT CREEK TO HERON, I-90 
  LOOKOUT PASS TO HAUGAN, HIGHWAY 200 BONNER TO GREENOUGH, 
  HIGHWAY 83 SEELEY LAKE TO CONDON, AND I-90 EAST MISSOULA TO 
  BEARMOUTH

$$

IDZ007-008-161800-
/O.CON.KMSO.WW.Y.0065.000000T0000Z-161216T1800Z/
300 AM PST FRI DEC 16 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* IMPACTS/TIMING: LIGHT TO MODERATE SNOW WILL RETURN THIS MORNING.
  ALONG WITH SNOW, NORTH AND EAST WINDS WILL INCREASE THIS MORNING
  CREATING LOCAL AREAS OF BLOWING SNOW AND VERY COLD WIND CHILLS.


* SNOW ACCUMULATIONS: 1 TO 3 INCHES, WITH 2 TO 5 INCHES FOR THE
  HIGHER TERRAIN AND WHITE BIRD GRADE. 

* WIND CHILLS BY FRIDAY MORNING: NEGATIVE 5 TO NEGATIVE 15.

* LOCATIONS IMPACTED INCLUDE: CAMAS PRAIRIE, GRANGEVILLE AND 
  VICINITY, GREER GRADE, HIGHWAY 95 SLATE CREEK TO RIGGINS, AND 
  WHITE BIRD GRADE

$$

IDZ005-006-161800-
/O.CON.KMSO.WW.Y.0065.000000T0000Z-161216T1800Z/
300 AM PST FRI DEC 16 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* IMPACTS/TIMING: LIGHT TO MODERATE SNOW WILL RETURN THIS MORNING.
  ALONG WITH SNOW, NORTH AND EAST WINDS WILL INCREASE THIS MORNING
  CREATING LOCAL AREAS OF BLOWING SNOW AND VERY COLD WIND CHILLS. 

* SNOW ACCUMULATIONS: 1 TO 3 INCHES.

* WIND CHILLS BY FRIDAY MORNING: NEGATIVE 5 TO NEGATIVE 15.

* LOCATIONS IMPACTED INCLUDE: ELK RIVER, HIGHWAY 11 PIERCE TO 
  HEADQUARTERS, PIERCE, DIXIE, ELK CITY, AND HIGHWAY 12 LOWELL 
  TO LOLO PASS

$$

MTZ006-161800-
/O.CON.KMSO.WW.Y.0065.000000T0000Z-161216T1800Z/
400 AM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING FOR HIGHWAY 93 SULA TO LOST TRAIL PASS AND LOLO PASS...

* IMPACTS/TIMING: NORTH AND EAST WINDS WILL INCREASE CREATING
  BLOWING SNOW AND VERY COLD WIND CHILLS THROUGH THIS MORNING. 

* SNOW ACCUMULATIONS: 2 TO 5 INCHES.

* WIND CHILLS BY FRIDAY MORNING: NEGATIVE 5 TO NEGATIVE 15.

$$

MTZ005-161800-
/O.CON.KMSO.WW.Y.0065.000000T0000Z-161216T1800Z/
400 AM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING FOR BITTERROOT VALLEY AND MISSOULA...

* IMPACTS/TIMING: NORTH AND EAST WINDS WILL CAUSE BLOWING SNOW 
THIS MORNING. VERY LOW VISIBILITIES AND POOR ROAD CONDITIONS 
WILL OCCUR IN LOCATIONS WITH DRIFTING SNOW WITH HELLGATE CANYON 
BEING THE MOST PRONE BUT ALL LOCATIONS WILL HAVE VARYING DEGREES
OF BLOWING SNOW. WIND CHILLS WILL ALSO BECOME VERY COLD DURING 
THE MORNING.

* WIND CHILLS BY FRIDAY MORNING: NEGATIVE 15 TO NEGATIVE 25.

$$

MTZ003-161800-
/O.CON.KMSO.WW.Y.0065.000000T0000Z-161216T1800Z/
400 AM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* IMPACTS/TIMING: SNOW WILL CONTINUE ESPECIALLY ON THE SOUTH SIDE
  OF FLATHEAD LAKE. ALONG WITH SNOW, NORTH WINDS WILL CONTINUE
  CREATING BLOWING SNOW AND VERY COLD WIND CHILLS THROUGH THE 
  MORNING. 

* NEW SNOW ACCUMULATIONS: 2 TO 4 INCHES ON THE SOUTH SIDE OF 
  FLATHEAD LAKE INCLUDING POLSON. 1 TO 3 INCHES ELSEWHERE. 

* WIND CHILLS BY FRIDAY MORNING: NEGATIVE 15 TO NEGATIVE 25 IN 
  THE FLATHEAD VALLEY. AROUND NEGATIVE 10 IN THE MISSION VALLEY. 

* LOCATIONS IMPACTED INCLUDE: FLATHEAD LAKE, FLATHEAD VALLEY, 
  MISSION VALLEY, AND POLSON

$$

MTZ001-161800-
/O.CON.KMSO.WW.Y.0065.000000T0000Z-161216T1800Z/
400 AM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* IMPACTS/TIMING: NORTH AND EAST WINDS WILL CREATE LOCALIZED 
BLOWING SNOW AND VERY COLD WIND CHILLS THROUGH THIS MORNING.

* WIND CHILLS BY FRIDAY MORNING: NEGATIVE 15 TO NEGATIVE 25.

* LOCATIONS IMPACTED INCLUDE: HIGHWAY 2 KALISPELL TO LIBBY, 
  HIGHWAY 37 EUREKA TO LIBBY, HIGHWAY 56 BULL LAKE ROAD, AND 
  HIGHWAY 93 EUREKA TO WHITEFISH

$$

MTZ002-161800-
/O.CON.KMSO.WW.Y.0065.000000T0000Z-161216T1800Z/
400 AM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* IMPACTS/TIMING: NORTH AND EAST WINDS WILL CONTINUE CREATING
  BLOWING SNOW AND VERY COLD WIND CHILLS THROUGH THIS MORNING. 

* WIND CHILLS BY FRIDAY MORNING: NEGATIVE 15 TO NEGATIVE 25.

* LOCATIONS IMPACTED INCLUDE: BAD ROCK CANYON, ESSEX, HIGHWAY 83 
  BIGFORK TO SWAN LAKE, MARIAS PASS, AND POLEBRIDGE

$$

656 
WWUS45 KMSO 161750
WSWMSO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
1050 AM MST FRI DEC 16 2016

MTZ004-161900-
/O.CAN.KMSO.WW.Y.0065.000000T0000Z-161216T1800Z/
1050 AM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WINTER
WEATHER ADVISORY. 

$$

MTZ006-161900-
/O.EXP.KMSO.WW.Y.0065.000000T0000Z-161216T1800Z/
1050 AM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS MORNING
FOR HIGHWAY 93 SULA TO LOST TRAIL PASS AND LOLO PASS...


$$

MTZ001-161900-
/O.EXP.KMSO.WW.Y.0065.000000T0000Z-161216T1800Z/
1050 AM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS
MORNING...

* LOCATIONS IMPACTED INCLUDE: HIGHWAY 2 KALISPELL TO LIBBY, 
  HIGHWAY 37 EUREKA TO LIBBY, HIGHWAY 56 BULL LAKE ROAD, AND 
  HIGHWAY 93 EUREKA TO WHITEFISH

$$

IDZ010-170000-
/O.CON.KMSO.WS.W.0010.000000T0000Z-161217T0000Z/
1050 AM MST FRI DEC 16 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* IMPACTS/TIMING: LIGHT TO MODERATE SNOW WILL COMBINE WITH NORTH
  AND EAST WINDS CREATING BLOWING AND DRIFTING SNOW. TREACHEROUS
  CONDITIONS ARE LIKELY WITH AREAS OF VERY LOW TO ZERO VISIBILITY
  THIS MORNING THROUGH THE AFTERNOON ALONG HIGHWAY 93 AND HIGHWAY
  28.

* SNOW ACCUMULATIONS: ADDITIONAL SNOW AMOUNTS OF 1 TO 3 INCHES.

* LOCATIONS IMPACTED INCLUDE: BANNOCK PASS, HIGHWAY 28 TENDOY TO 
  LONE PINE, HIGHWAY 93 LOST TRAIL PASS TO GIBBONSVILLE, LEMHI 
  PASS, AND SALMON

$$

MTZ007-170000-
/O.CON.KMSO.WS.W.0010.000000T0000Z-161217T0000Z/
1050 AM MST FRI DEC 16 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* IMPACTS/TIMING: AN ARCTIC FRONT CONTINUES TO SLIDE DOWN TODAY
  BRINGING ANOTHER ROUND OF SNOW, BREEZY WINDS, BLOWING SNOW, AND
  FRIGID TEMPERATURES TO THE AREA. WE ARE STILL EXPECTING
  CONDITIONS TO WORSEN WITH LIGHT TO MODERATE SNOW AND EXTREMELY 
  LOW VISIBILITIES DUE TO THE COMBINATION OF WIND AND SNOW. 

* SNOW ACCUMULATIONS: ADDITIONAL 1 TO 3 INCHES.

* WIND CHILLS: NEGATIVE 15 TO NEGATIVE 25.

* LOCATIONS IMPACTED INCLUDE: BUTTE, GEORGETOWN LAKE, HIGHWAY 12 
  GARRISON TO ELLISTON, HOMESTAKE PASS, AND MACDONALD PASS

$$

MTZ043-170000-
/O.EXT.KMSO.WW.Y.0065.000000T0000Z-161217T0000Z/
1050 AM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* IMPACTS/TIMING: NORTH AND EAST WINDS WILL CREATE BLOWING SNOW
  AND VERY COLD WIND CHILLS THROUGH THIS AFTERNOON. AREAS OF
  CONCERN FOR BLOWING AND DRIFTING SNOW WILL BE ALONG I-90 FROM
  EAST MISSOULA TO BEARMOUTH.

* WIND CHILLS: NEGATIVE 15 TO NEGATIVE 25.

* LOCATIONS IMPACTED INCLUDE: HIGHWAY 200 BONNER TO GREENOUGH, 
  HIGHWAY 83 SEELEY LAKE TO CONDON, AND I-90 EAST MISSOULA TO 
  BEARMOUTH

$$

IDZ007-008-170000-
/O.EXT.KMSO.WW.Y.0065.000000T0000Z-161217T0000Z/
950 AM PST FRI DEC 16 2016

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON...

* IMPACTS/TIMING: LIGHT TO MODERATE SNOW WILL CONTINUE THROUGH
  THIS AFTERNOON. BREEZY WINDS COULD ALSO REDUCE VISIBILITY.


* SNOW ACCUMULATIONS: ADDITIONAL 1 TO 3 INCHES, WITH 2 TO 5 INCHES
  FOR THE HIGHER TERRAIN AND WHITE BIRD GRADE THROUGH THIS
  AFTERNOON.

* LOCATIONS IMPACTED INCLUDE: CAMAS PRAIRIE, GRANGEVILLE AND 
  VICINITY, GREER GRADE, HIGHWAY 95 SLATE CREEK TO RIGGINS, AND 
  WHITE BIRD GRADE

$$

IDZ005-006-170000-
/O.EXT.KMSO.WW.Y.0065.000000T0000Z-161217T0000Z/
950 AM PST FRI DEC 16 2016

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON...

* IMPACTS/TIMING: LIGHT TO MODERATE SNOW WILL CONTINUE THROUGH
  THIS AFTERNOON. BREEZY WINDS COULD ALSO REDUCE VISIBILITY. 

* SNOW ACCUMULATIONS: ADDITIONAL 1 TO 3 INCHES.

* LOCATIONS IMPACTED INCLUDE: ELK RIVER, HIGHWAY 11 PIERCE TO 
  HEADQUARTERS, PIERCE, DIXIE, ELK CITY, AND HIGHWAY 12 LOWELL 
  TO LOLO PASS

$$

MTZ005-170000-
/O.EXT.KMSO.WW.Y.0065.000000T0000Z-161217T0000Z/
1050 AM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON FOR BITTERROOT VALLEY AND MISSOULA...

* IMPACTS/TIMING: NORTH AND EAST WINDS WILL CONTINUE TO CAUSE
  BLOWING SNOW THROUGH THIS AFTERNOON. VERY LOW VISIBILITIES AND
  POOR ROAD CONDITIONS WILL OCCUR IN LOCATIONS WITH DRIFTING SNOW
  WITH HELLGATE CANYON AND HIGHWAY 93 THROUGH THE BITTERROOT BEING
  THE MOST PRONE BUT ALL LOCATIONS WILL HAVE VARYING DEGREES OF
  BLOWING SNOW. WIND CHILLS WILL ALSO BECOME VERY COLD THROUGH THE
  EVENING. CONDITIONS MAY ALSO WORSEN LATER THIS MORNING AND AFTERNOON
  FOR THE ABOVE LOCATIONS BEFORE THEY GET BETTER.

* WIND CHILLS BY FRIDAY MORNING: NEGATIVE 15 TO NEGATIVE 25.

$$

MTZ003-170000-
/O.EXT.KMSO.WW.Y.0065.000000T0000Z-161217T0000Z/
1050 AM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* IMPACTS/TIMING: BLOWING AND DRIFTING SNOW WILL CONTINUE THROUGH
  THE AFTERNOON HOURS. CURRENT ROAD REPORTS AROUND THE NORTHERN
  FLATHEAD VALLEY AND AROUND FLATHEAD LAKE SHOW BLOWING AND
  DRIFTING SNOW. CONDITIONS MAY EVEN WORSEN BEFORE THEY GET
  BETTER. WIND CHILLS WILL ALSO REMAIN A CONCERN THROUGH THE
  EVENING. 

* WIND CHILLS: NEGATIVE 15 TO NEGATIVE 25 IN THE FLATHEAD VALLEY.
  AROUND NEGATIVE 10 IN THE MISSION VALLEY. 

* LOCATIONS IMPACTED INCLUDE: FLATHEAD LAKE, FLATHEAD VALLEY, 
  MISSION VALLEY, AND POLSON

$$

MTZ002-170000-
/O.EXT.KMSO.WW.Y.0065.000000T0000Z-161217T0000Z/
1050 AM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* IMPACTS/TIMING: NORTH AND EAST WINDS WILL CONTINUE CREATING
  BLOWING SNOW AND VERY COLD WIND CHILLS THROUGH THIS EVENING. 

* WIND CHILLS: NEGATIVE 20 TO NEGATIVE 30.

* LOCATIONS IMPACTED INCLUDE: BAD ROCK CANYON, ESSEX, HIGHWAY 83 
  BIGFORK TO SWAN LAKE, MARIAS PASS, AND POLEBRIDGE

$$

497 
WWUS45 KMSO 162351
WSWMSO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
451 PM MST FRI DEC 16 2016

MTZ005-171600-
/O.EXP.KMSO.WW.Y.0065.000000T0000Z-161217T0000Z/
/O.NEW.KMSO.WC.Y.0002.161217T0000Z-161217T1600Z/
451 PM MST FRI DEC 16 2016

...WIND CHILL ADVISORY IN EFFECT UNTIL 9 AM MST SATURDAY FOR
BITTERROOT VALLEY AND MISSOULA...
...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM MST THIS AFTERNOON
FOR BITTERROOT VALLEY AND MISSOULA...

* IMPACTS/TIMING: A STEADY LIGHT WIND OF 10 TO 15 MPH THIS EVENING
  WILL PRODUCE POTENTIALLY DANGEROUS WIND CHILL VALUES OVERNIGHT,
  ESPECIALLY AROUND DOWNTOWN MISSOULA AND NEAR THE MOUTH OF
  HELLGATE CANYON. THE WIND MAY LIGHTEN OVERNIGHT, LESSENING THE
  WIND CHILL IMPACT BY MORNING. BUT AMBIENT AIR TEMPERATURES WILL
  FALL SIGNIFICANTLY AS A RESULT, BECOMING DANGEROUSLY COLD BY
  MORNING.

* WIND CHILL: 10 DEGREES BELOW ZERO TO 20 DEGREES BELOW ZERO.

$$

MTZ003-171600-
/O.EXP.KMSO.WW.Y.0065.000000T0000Z-161217T0000Z/
/O.NEW.KMSO.WC.Y.0002.161217T0000Z-161217T1600Z/
451 PM MST FRI DEC 16 2016

...WIND CHILL ADVISORY IN EFFECT UNTIL 9 AM MST SATURDAY...
...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM MST THIS
AFTERNOON...

* IMPACTS/TIMING: A STEADY LIGHT WIND OF 10 TO 15 MPH THIS EVENING
  WILL PRODUCE POTENTIALLY DANGEROUS WIND CHILL VALUES, ESPECIALLY
  ALONG US-2 LEADING UP TO MARIAS PASS AND AT THE MOUTH OF BAD
  ROCK CANYON. THE WIND MAY LIGHTEN OVERNIGHT, LESSENING THE WIND
  CHILL IMPACT BY MORNING. BUT AMBIENT AIR TEMPERATURES WILL FALL
  SIGNIFICANTLY AS A RESULT, BECOMING DANGEROUSLY COLD BY MORNING.

* SNOW IMPACTS: WHILE IMPACTS ATTRIBUTED TO SNOW ARE LESSENING 
THIS EVENING, LAKE EFFECT SNOW MAY BE POSSIBLE AGAIN LATE 
TONIGHT. AS SUCH AN ADDITIONAL WINTER WEATHER HIGHLIGHT MAY BE 
NECESSARY TO DRAW ATTENTION TO THIS POTENTIAL IMPACT. 

* WIND CHILL: 10 DEGREES BELOW ZERO TO 20 DEGREES BELOW ZERO.

* LOCATIONS IMPACTED INCLUDE: FLATHEAD LAKE, FLATHEAD VALLEY, 
  MISSION VALLEY, AND POLSON

$$

MTZ002-171600-
/O.EXP.KMSO.WW.Y.0065.000000T0000Z-161217T0000Z/
/O.NEW.KMSO.WC.Y.0002.161217T0000Z-161217T1600Z/
451 PM MST FRI DEC 16 2016

...WIND CHILL ADVISORY IN EFFECT UNTIL 9 AM MST SATURDAY...
...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM MST THIS
AFTERNOON...

* IMPACTS/TIMING: PERSISTENT LIGHT WIND OF 10 TO 15 MPH THIS
  EVENING WILL PRODUCE POTENTIALLY DANGEROUS WIND CHILL VALUES,
  ESPECIALLY ALONG US-2 LEADING UP TO MARIAS PASS AND AT THE MOUTH
  OF BAD ROCK CANYON. THE WIND MAY LIGHTEN OVERNIGHT, LESSENING
  THE WIND CHILL IMPACT BY MORNING. BUT AMBIENT AIR TEMPERATURES
  WILL FALL SIGNIFICANTLY AS A RESULT AND POTENTIALLY BECOME
  DANGEROUSLY COLD BY MORNING.

* WIND CHILL: 10 DEGREES BELOW ZERO TO 20 DEGREES BELOW ZERO.

* LOCATIONS IMPACTED INCLUDE: BAD ROCK CANYON, ESSEX, MT-83
  BIGFORK TO SWAN LAKE, MARIAS PASS, AND POLEBRIDGE

$$

MTZ043-170100-
/O.EXP.KMSO.WW.Y.0065.000000T0000Z-161217T0000Z/
451 PM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM MST THIS
AFTERNOON...


$$

IDZ010-170500-
/O.EXT.KMSO.WS.W.0010.000000T0000Z-161217T0500Z/
451 PM MST FRI DEC 16 2016

...WINTER STORM WARNING NOW IN EFFECT UNTIL 10 PM MST THIS
EVENING...

* IMPACTS/TIMING: THE COMBINATION OF STEADY SNOW AND PERSISTENT
  WINDS CONTINUE TO PRODUCE BLOWING AND DRIFTING SNOW ISSUES
  THROUGHOUT LEMHI COUNTY. PERIODS OF TREACHEROUS TRAVEL ARE STILL
  LIKELY WITH AREAS OF NEAR ZERO VISIBILITY AT TIMES THIS EVENING
  ALONG US-93 AND ID-28.

* SNOW ACCUMULATIONS: ADDITIONAL SNOW AMOUNTS OF UP TO 2 INCHES
  THIS EVENING.

* LOCATIONS IMPACTED INCLUDE: BANNOCK PASS, ID-28 TENDOY TO LONE
  PINE, US-93 LOST TRAIL PASS TO GIBBONSVILLE, LEMHI PASS, AND
  SALMON

$$

MTZ007-170500-
/O.EXT.KMSO.WS.W.0010.000000T0000Z-161217T0500Z/
451 PM MST FRI DEC 16 2016

...WINTER STORM WARNING NOW IN EFFECT UNTIL 10 PM MST THIS
EVENING...

* IMPACTS/TIMING: THE COMBINATION OF STEADY FALLING SNOW AND
  BREEZY WINDS CONTINUE TO PRODUCE AREAS OF BLOWING SNOW, AND
  FRIGID TEMPERATURES THROUGHOUT THE AREA. PERIODS OF VERY LOW
  VISIBILITY DUE TO THE COMBINATION OF WIND AND SNOW ARE EXPECTED
  TO PERSIST THROUGH THE EVENING.

* SNOW ACCUMULATIONS: AN ADDITIONAL 1 TO 2 INCHES.

* WIND CHILL: NEGATIVE 15 TO NEGATIVE 25.

* LOCATIONS IMPACTED INCLUDE: BUTTE, GEORGETOWN LAKE, US-12
  GARRISON TO ELLISTON, HOMESTAKE PASS, AND MACDONALD PASS

$$

IDZ007-008-170500-
/O.EXT.KMSO.WW.Y.0065.000000T0000Z-161217T0500Z/
351 PM PST FRI DEC 16 2016

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 9 PM PST THIS
EVENING...

* IMPACTS/TIMING: STEADY LIGHT SNOW AND BREEZY WINDS WILL CONTINUE
  TO PRODUCE PERIODS OF REDUCED VISIBILITY AND POTENTIALLY ICY
  TRAVEL AT TIMES.

* SNOW ACCUMULATIONS: AN ADDITIONAL 1 TO 2 INCHES, WITH 1 TO 3
  INCHES FOR THE HIGHER TERRAIN AND WHITE BIRD GRADE THRU THE
  EVENING.

* LOCATIONS IMPACTED INCLUDE: CAMAS PRAIRIE, GRANGEVILLE AND
  VICINITY, GREER GRADE, US-95 SLATE CREEK TO RIGGINS, AND WHITE
  BIRD GRADE

$$

IDZ005-006-170500-
/O.EXT.KMSO.WW.Y.0065.000000T0000Z-161217T0500Z/
351 PM PST FRI DEC 16 2016

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 9 PM PST THIS
EVENING...

* IMPACTS/TIMING: STEADY LIGHT SNOW AND BREEZY WINDS WILL CONTINUE
  TO PRODUCE PERIODS OF REDUCED VISIBILITY AND POTENTIALLY ICY
  TRAVEL AT TIMES.

* SNOW ACCUMULATIONS: ADDITIONAL 1 TO 2 INCHES THIS EVENING.

* LOCATIONS IMPACTED INCLUDE: ELK RIVER, ID-11 PIERCE TO
  HEADQUARTERS, PIERCE, DIXIE, ELK CITY, AND US-12 LOWELL TO LOLO
  PASS

$$

393 
WWUS45 KMSO 170435
WSWMSO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
935 PM MST FRI DEC 16 2016

IDZ010-170545-
/O.EXP.KMSO.WS.W.0010.000000T0000Z-161217T0500Z/
935 PM MST FRI DEC 16 2016

...WINTER STORM WARNING WILL EXPIRE AT 10 PM MST THIS EVENING...

SNOWFALL HAS LARGELY COME TO AN END AND WINDS CONTINUE TO DRAW
DOWN. HOWEVER ICY ROADWAYS MAY STILL BE PRESENT SO PLEASE TRAVEL
WITH CAUTION.

$$

MTZ007-170545-
/O.EXP.KMSO.WS.W.0010.000000T0000Z-161217T0500Z/
935 PM MST FRI DEC 16 2016

...WINTER STORM WARNING WILL EXPIRE AT 10 PM MST THIS EVENING...

SNOWFALL HAS LARGELY COME TO AN END AND WINDS CONTINUE TO DRAW
DOWN. HOWEVER ICY ROADWAYS MAY STILL BE PRESENT SO PLEASE TRAVEL
WITH CAUTION.

$$

MTZ005-170545-
/O.CAN.KMSO.WC.Y.0002.000000T0000Z-161217T1600Z/
935 PM MST FRI DEC 16 2016

...WIND CHILL ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WIND
CHILL ADVISORY. 

WINDS IN THE MISSOULA AND BITTERROOT VALLEY HAVE DECREASED
SIGNIFICANTLY SINCE SUNSET AND THUS WIND CHILL VALUES SHOULD NO
LONGER BE A WIDESPREAD CONCERN. HOWEVER, DECREASING CLOUDS AND THE
CALM WINDS WILL PROMOTE RAPIDLY FALLING TEMPERATURES TO READINGS
WELL BELOW ZERO. SO PLEASE TAKE ALL EXTREME COLD WEATHER MEASURE
TO PROTECT LIFE AND PROPERTY.

$$

IDZ005-006-170545-
/O.EXP.KMSO.WW.Y.0065.000000T0000Z-161217T0500Z/
835 PM PST FRI DEC 16 2016

...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 PM PST THIS EVENING...


$$

IDZ007-008-171600-
/O.EXT.KMSO.WW.Y.0065.000000T0000Z-161217T1600Z/
835 PM PST FRI DEC 16 2016

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 8 AM PST
SATURDAY...

* IMPACTS/TIMING: STEADY LIGHT SNOW AND BREEZY WINDS WILL 
  CONTINUE TO PRODUCE PERIODS OF REDUCED VISIBILITY AND 
  POTENTIALLY ICY TRAVEL AT TIMES. 

* SNOW ACCUMULATIONS: AN ADDITIONAL 1 TO 2 INCHES, WITH 1 TO 3 
  INCHES FOR THE HIGHER TERRAIN AND WHITE BIRD GRADE THRU THE 
  EVENING. 

* LOCATIONS IMPACTED INCLUDE: CAMAS PRAIRIE, GRANGEVILLE AND 
  VICINITY, GREER GRADE, HIGHWAY 95 SLATE CREEK TO RIGGINS, AND 
  WHITE BIRD GRADE

$$

MTZ002-003-171600-
/O.CON.KMSO.WC.Y.0002.000000T0000Z-161217T1600Z/
935 PM MST FRI DEC 16 2016

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 9 AM MST
SATURDAY...

* IMPACTS/TIMING: A STEADY LIGHT WIND OF 10 TO 15 MPH THIS EVENING
  WILL PRODUCE POTENTIALLY DANGEROUS WIND CHILL VALUES, ESPECIALLY
  ALONG US-2 LEADING UP TO MARIAS PASS AND AT THE MOUTH OF BAD
  ROCK CANYON AND THEN AROUND FLATHEAD LAKE AND THE NORTHERN
  MISSION VALLEY THROUGH MORNING. THE WIND MAY LIGHTEN OVERNIGHT,
  LESSENING THE WIND CHILL IMPACT BY MORNING. BUT AMBIENT AIR
  TEMPERATURES WILL FALL SIGNIFICANTLY AS A RESULT, BECOMING
  DANGEROUSLY COLD BY MORNING.

* SNOW IMPACTS: LAKE EFFECT SNOW MAY BE STARTING TO FORM. HOWEVER
  SYNOPTIC CONDITIONS DO NOT APPEAR FAVORABLE FOR MUCH MORE THAN
  VERY LIGHT SNOW FROM FINLEY POINT TO POLSON.

* WIND CHILL: 10 DEGREES BELOW ZERO TO 20 DEGREES BELOW ZERO.

* LOCATIONS IMPACTED INCLUDE: BAD ROCK CANYON, ESSEX, HIGHWAY 83 
  BIGFORK TO SWAN LAKE, MARIAS PASS, POLEBRIDGE, FLATHEAD LAKE, 
  FLATHEAD VALLEY, MISSION VALLEY, AND POLSON

$$

Area Forecast Discussion
National Weather Service Missoula MT
600 AM MST Thu Dec 15 2016

.UPDATE...Upgraded the winter weather advisory to a warning.

&&

.DISCUSSION...The 3 to 6 inches of snow across the Missoula and
Bitterroot valleys is created hazardous driving conditions so the
advisory has been upgraded to a warning.

&&

.AVIATION...The warm front has moved into north central Idaho and
west central Montana. This front is causing widespread snow with
KMSO, KSMN and KBTM being impacted by low visibilities and
ceilings. The focus of snow will shift to southwest Montana (KBTM)
by this afternoon. An arctic cold front will push into the
Northern Rockies tonight creating gusty easterly to northerly
winds. Also southwest Montana and Lemhi county could continue to
experience steady snow as a low pressure moves across southern
Idaho tonight.

&&

.PREV DISCUSSION... /ISSUED 346 AM MST Thu Dec 15 2016/

..Widespread Snow Across North Central Idaho and West Central
Montana Today...

..Arctic Airmass Impacting the Area Tonight into Friday...

DISCUSSION...A warm front moved into north central Idaho and
west central Montana last night, causing fairly steady snow this
morning. Areas south of a line from Lookout pass to McDonald pass
should receive a couple to several inches of snow by this
afternoon, so the winter weather advisories are still in place.
The steady snow will shift to southwest Montana this afternoon, as
scattered showers affect the remainder of the Northern Rockies.

An arctic airmass will be moving into the Northern Rockies tonight
causing gusty easterly winds, especially the favored narrow
valley locations. The cold air combined with gusty easterly winds
will create dangerous wind chills, particularly along the
Continental Divide. As this air is ushered into the region, it
could pick up the previously fallen snow, creating blowing and
drifting snow. The models are also indicating that the low
pressure system that will be moving through the Great Basin wraps
precipitation into southwest Montana and Lemhi county Thursday
night into Friday morning. This wrap around moisture should allow
for a couple of more inches of new snow to fall across the
aforementioned area.

The precipitation and clouds will move out of the area Friday
night, allowing for a fairly clear night. The well entrenched
arctic air will cause temperatures to drop dramatically by
Saturday morning. A few of the cold high valley locations along
the divide could have readings around -20 to -30 degrees on
Saturday morning.

Forecast models are indicating a weak disturbance dropping into
northwest Montana Saturday night which could increase shower
activity. The Glacier Park region appears to have the best chance
of receiving light snow from this disturbance.

Northwest flow with weak passing disturbances will bring light
snow to portions of northwest/west-central Montana and north
central Idaho Sunday into Monday. Favored upslope areas, such as
the Mission and Clearwater Mountains, the Seeley/Swan valleys and
locations near the Idaho panhandle can expect several inches of
new snow, even down into the lowest elevations.

A series of fronts will move through the region Tuesday into
Wednesday. Initially, a warm front will begin to moderate
temperatures with a strong southerly flow. The degree to which
temperatures moderate will depend greatly on the strength of
inversions however. Locations on the Camas Prairie may experience
a period of strong southerly winds Monday afternoon into Tuesday.
Then a strong Pacific cold front will pass Tuesday afternoon,
bringing gusty west winds to the region. Precipitation (in the
form of snow) will be prevalent across the region, though larger
valleys (such as the Missoula/Bitterroot and Mission valleys) will
see downsloping during this time frame.

AVIATION...The warm front has moved into north central Idaho and
west central Montana. This front is causing widespread snow with
KMSO, KSMN and KBTM being impacted by low visibilities and
ceilings. The focus of snow will shift to southwest Montana (KBTM)
by this afternoon. An arctic cold front will push into the
Northern Rockies tonight creating gusty easterly to northerly
winds. Also southwest Montana and Lemhi county could continue to
experience steady snow as a low pressure moves across southern
Idaho tonight.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...Winter Weather Advisory until 11 AM MST this morning
     Bitterroot/Sapphire Mountains.

     Winter Weather Advisory until 11 AM MST this morning
     Potomac/Seeley Lake Region.

     Winter Weather Advisory until 11 AM MST Friday Butte/Blackfoot
     Region.

     Winter Weather Advisory until 11 AM MST this morning Lower Clark
     Fork Region.

     Winter Storm Warning until 11 AM MST this morning
     Missoula/Bitterroot Valleys.

ID...Winter Weather Advisory until 10 AM PST this morning Northern
     Clearwater Mountains...Southern Clearwater Mountains.

     Winter Weather Advisory until 11 AM MST this morning Eastern
     Lemhi County...Western Lemhi County.

     Winter Weather Advisory until 10 AM PST this morning Lower Hells
     Canyon/Salmon River Region...Orofino/Grangeville Region.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
1251 PM MST THU DEC 15 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1250 PM     SNOW             OROFINO                 46.48N 116.25W
12/15/2016  E5.0 INCH        CLEARWATER         ID   LAW ENFORCEMENT

            .

&&

NWS MISSOULA MT
IRIS SYSTEM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
108 PM MST THU DEC 15 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0900 AM     SNOW             3 SW OVANDO             46.99N 113.17W
12/15/2016  M3.0 INCH        POWELL             MT   COCORAHS

            COCORAHS STATION 2 WSW OVANDO /MT-PW-3/. THE
            DURATION OF THE SNOW EVENT WAS 12 HOURS.

&&

NWS MISSOULA MT
IRIS SYSTEM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
146 PM MST THU DEC 15 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0100 PM     SNOW             1 ESE FINLEY POINT      47.73N 114.04W
12/15/2016  E8.0 INCH        LAKE               MT   DEPT OF HIGHWAYS

            TOTAL FROM OVERNIGHT AND THROUGH THE
            MORNING. LAKE ENHANCED.

&&

MW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
151 PM MST THU DEC 15 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0147 PM     SNOW             2 E POLSON              47.69N 114.11W
12/15/2016  M3.0 INCH        LAKE               MT   TRAINED SPOTTER

            . THE DURATION OF THE SNOW EVENT WAS 18
            HOURS.

&&

NWS MISSOULA MT
IRIS SYSTEM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
202 PM MST THU DEC 15 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0201 PM     SNOW             SALMON                  45.18N 113.90W
12/15/2016  M7.0 INCH        LEMHI              ID   DEPT OF HIGHWAYS

            .

&&

NWS MISSOULA MT
IRIS SYSTEM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
204 PM MST THU DEC 15 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0203 PM     HEAVY SNOW       2 WNW STEVENSVILLE      46.52N 114.13W
12/15/2016  M13.0 INCH       RAVALLI            MT   TRAINED SPOTTER

            AN UPDATED STORM TOTAL OF 13" OF NEW SNOW
            SINCE OVERNIGHT.

&&

NWS MISSOULA MT
IRIS SYSTEM