Winter Storm Warning 5, NWS Missoula, MT

408 
WWUS45 KMSO 040854
WSWMSO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
154 AM MST SAT FEB 4 2017

MTZ002-050900-
/O.CON.KMSO.WS.W.0005.000000T0000Z-170205T0000Z/
/O.CON.KMSO.WW.Y.0011.170205T0000Z-170206T0000Z/
/O.CON.KMSO.WS.A.0004.170206T0000Z-170207T0000Z/
154 AM MST SAT FEB 4 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS
AFTERNOON TO 5 PM MST SUNDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON
THROUGH MONDAY AFTERNOON...

* IMPACTS/TIMING: SNOW THAT FELL FRIDAY AFTERNOON HAS CAUSED 
  VERY POOR ROAD CONDITIONS AND AS OF 7:30 PM THE MONTANA 
  DEPARTMENT OF TRANSPORTATION IS REPORTING SEVERE DRIVING 
  CONDITIONS ON HIGHWAY 2 FROM WEST GLACIER TO DEVIL CREEK. 
  ADDITIONAL MODERATE TO HEAVY SNOW TONIGHT WILL ADD TO THE 
  PROBLEM. SNOW WILL BECOME LIGHT TO MODERATE FOR LATE SATURDAY 
  AND INTO SUNDAY BEFORE ANOTHER EVEN MORE ROBUST WEATHER SYSTEM 
  ARRIVES FOR SUNDAY AFTERNOON THROUGH MONDAY. VERY HEAVY SNOW 
  WILL FALL WITH THE SUNDAY NIGHT THROUGH MONDAY NIGHT EVENT 
  THAT ALONG WITH GUSTY EAST WINDS WILL CAUSE WHITEOUT 
  CONDITIONS AND MAKE ROADS IMPASSIBLE. 

* SNOW ACCUMULATIONS: AN ADDITIONAL 8 TO 12 INCHES BY SATURDAY 
  LATE MORNING. 6 TO 10 INCHES SATURDAY NIGHT THROUGH SUNDAY, 
  AND AN ADDITIONAL 16 TO 24 INCHES SUNDAY NIGHT THROUGH MONDAY 
  NIGHT. 

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

$$

MTZ004-050900-
/O.CON.KMSO.WS.W.0005.000000T0000Z-170205T0000Z/
/O.CON.KMSO.WW.Y.0011.170205T0000Z-170206T0000Z/
/O.CON.KMSO.WS.A.0004.170206T0000Z-170207T0000Z/
154 AM MST SAT FEB 4 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS
AFTERNOON TO 5 PM MST SUNDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON
THROUGH MONDAY AFTERNOON...

* IMPACTS/TIMING: SNOW THAT FELL FRIDAY AFTERNOON HAS CAUSED 
  VERY POOR ROAD CONDITIONS AND AS OF 7:30 PM THE MONTANA 
  DEPARTMENT OF TRANSPORTATION IS REPORTING SEVERE DRIVING 
  CONDITIONS ON I- 90 FROM SAINT REGIS TO LOOKOUT PASS. 
  ADDITIONAL MODERATE TO HEAVY SNOW TONIGHT WILL ADD TO THE 
  PROBLEM. FREEZING RAIN IS STILL ALSO POSSIBLE AT LOW 
  ELEVATIONS THROUGH SATURDAY MORNING. SNOW WILL BECOME LIGHT TO 
  MODERATE FOR LATE SATURDAY AND INTO SUNDAY BEFORE ANOTHER EVEN 
  MORE ROBUST WEATHER SYSTEM ARRIVES FOR SUNDAY AFTERNOON 
  THROUGH MONDAY. VERY HEAVY SNOW WILL FALL WITH THE SUNDAY 
  NIGHT THROUGH MONDAY NIGHT EVENT WITH PERIODS OF NEAR WHITEOUT 
  CONDITIONS OVER LOOKOUT PASS. 

* SNOW ACCUMULATIONS: AN ADDITIONAL 6 TO 10 INCHES BY SATURDAY 
  LATE MORNING FROM HAUGAN TO LOOKOUT PASS. 6 TO 10 INCHES 
  SATURDAY NIGHT THROUGH SUNDAY FROM SALTESE TO LOOKOUT PASS, 
  AND AND ADDITIONAL 17 TO 23 INCHES SUNDAY NIGHT THROUGH MONDAY 
  NIGHT SALTESE TO LOOKOUT PASS. 

* LOCATIONS IMPACTED INCLUDE: EVARO HILL, HIGHWAY 200 THOMPSON 
  FALLS TO PLAINS, HIGHWAY 200 TROUT CREEK TO HERON, AND I- 90 
  LOOKOUT PASS TO HAUGAN

$$

MTZ001-003-050900-
/O.CON.KMSO.WS.W.0005.000000T0000Z-170204T1800Z/
/O.CON.KMSO.WW.Y.0011.170204T1800Z-170205T1800Z/
/O.CON.KMSO.WS.A.0004.170205T1800Z-170207T0000Z/
154 AM MST SAT FEB 4 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 AM THIS
MORNING TO 11 AM MST SUNDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY MORNING
THROUGH MONDAY AFTERNOON...

* IMPACTS/TIMING: SNOW THAT FELL FRIDAY AFTERNOON HAS CAUSED 
  VERY POOR ROAD CONDITIONS AND AN ADDITIONAL MODERATE TO HEAVY 
  SNOW TONIGHT WILL ADD TO THE PROBLEM. SNOW WILL BECOME LIGHT 
  TO MODERATE FOR LATE SATURDAY AND INTO SUNDAY BEFORE ANOTHER 
  EVEN MORE ROBUST WEATHER SYSTEM ARRIVES FOR SUNDAY AFTERNOON 
  THROUGH MONDAY. VERY HEAVY SNOW WILL FALL WITH THE SUNDAY 
  NIGHT THROUGH MONDAY NIGHT EVENT THAT ALONG WITH GUSTY EAST 
  WINDS WILL CAUSE SOME LOCATIONS TO HAVE WHITEOUT CONDITIONS 
  AND MANY ROADS MAY BECOME IMPASSIBLE ON MONDAY. 

* SNOW ACCUMULATIONS: AN ADDITIONAL 4 TO 6 INCHES BY SATURDAY 
  LATE MORNING. 2 TO 5 INCHES SATURDAY NIGHT THROUGH SUNDAY, AND 
  AN ADDITIONAL 8 TO 12 INCHES SUNDAY NIGHT THROUGH MONDAY 
  NIGHT. THIS MEANS THAT THE STORM TOTAL BY LATE MONDAY MAY 
  REACH 16-24 INCHES. 

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

$$

MTZ007-041800-
/O.EXA.KMSO.WW.Y.0010.000000T0000Z-170204T1800Z/
154 AM MST SAT FEB 4 2017

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

* IMPACTS/TIMING: MODERATE TO HEAVY SNOW HAS DEVELOPED IN AN AREA
  FROM GEORGETOWN LAKE TO DRUMMOND ALONG HIGHWAY 1 AND FROM
  CLEARWATER JUNCTION TO OVANDO ON HIGHWAY 200. THESE TWO BANDS
  HAVE HISTORY OF PRODUCING OVER 1 INCH PER HOUR SNOW RATES. 

* SNOW ACCUMULATIONS: 2 TO 5 INCHES OF SNOW IS EXPECTED IN THE
  VALLEYS AND 3 TO 6 INCHES IN THE TERRAIN BY LATE MORNING. 

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

$$

MTZ043-050900-
/O.CON.KMSO.WW.Y.0010.000000T0000Z-170205T1800Z/
/O.CON.KMSO.WS.A.0004.170205T1800Z-170207T0000Z/
154 AM MST SAT FEB 4 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
SUNDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY MORNING
THROUGH MONDAY AFTERNOON...

* IMPACTS/TIMING: PERIODS OF LIGHT TO MODERATE SNOW ARE EXPECTED 
  TODAY INTO SUNDAY MORNING PRODUCING SLICK DRIVING CONDITIONS. 
  HEAVIER SNOW IS POSSIBLE SUNDAY AFTERNOON THROUGH MONDAY 
  CAUSING INTENSE SNOW RATES REDUCING VISIBILITY AND MAKING 
  DIFFICULT DRIVING CONDITIONS FOR THE MONDAY MORNING COMMUTE. 

* SNOW ACCUMULATIONS: 4 TO 7 INCHES OF SNOW BY SATURDAY MORNING. 
  AN ADDITIONAL 3 TO 5 INCHES SATURDAY NIGHT THROUGH SUNDAY, AND 
  5 TO 8 INCHES SUNDAY NIGHT INTO MONDAY. 

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

$$

IDZ007-041800-
/O.CON.KMSO.WW.Y.0010.000000T0000Z-170204T1800Z/
1254 AM PST SAT FEB 4 2017

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

* IMPACTS/TIMING: MANY LOCATIONS HAVE WARMED TO ABOVE FREEZING 
  SO PRECIPITATION THAT FALLS WILL BE RAIN AND WILL HAVE A 
  CHANCE TO REFREEZE OVERNIGHT. THERE IS STILL AN ISOLATED 
  THREAT OF FREEZING RAIN INTO SATURDAY MORNING AS WELL. 

* LOCATIONS IMPACTED INCLUDE: CAMAS PRAIRIE, GRANGEVILLE AND 
  VICINITY, AND GREER GRADE

$$

IDZ005-006-MTZ006-050900-
/O.CON.KMSO.WW.Y.0010.000000T0000Z-170205T1800Z/
154 AM MST SAT FEB 4 2017 /1254 AM PST SAT FEB 4 2017/

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
/10 AM PST/ SUNDAY...

* IMPACTS/TIMING: PERIODS OF SNOW AND POCKETS OF FREEZING RAIN 
  ARE EXPECTED INTO SUNDAY. THE SNOW MAY BECOME MODERATE TO 
  HEAVY AT TIMES OVER THE HIGHER TERRAIN REDUCING VISIBILITIES 
  TO BELOW 1/2 MILE. IT SHOULD BE NOTED THAT THIS IS A PROLONGED 
  MODERATE INTENSITY SNOW EVENT RATHER THAN INTENSE SHORT PERIOD 
  OF SNOW. 

* SNOW ACCUMULATIONS: 1 TO 2 FEET OF SNOW IS EXPECTED OVER THE 
  HIGHER TERRAIN AND MOUNTAIN PASSES (MAINLY LOLO PASS) BY 
  SUNDAY MORNING. 

* LOCATIONS IMPACTED INCLUDE: ELK RIVER, HIGHWAY 11 PIERCE TO 
  HEADQUARTERS, PIERCE, DIXIE, ELK CITY, HIGHWAY 12 LOWELL TO 
  LOLO PASS, HIGHWAY 93 SULA TO LOST TRAIL PASS, AND LOLO PASS

$$

MTZ005-041800-
/O.CON.KMSO.WW.Y.0010.000000T0000Z-170204T1800Z/
154 AM MST SAT FEB 4 2017

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

* IMPACTS/TIMING: LIGHT TO MODERATE SNOW IS EXPECTED UNTIL 
  SATURDAY MORNING, REDUCING VISIBILITY AND DEGRADING ROADS AT 
  TIMES. THE SNOW MAY TRANSITION TO LIGHT FREEZING RAIN AND ICE 
  PELLETS AT TIMES, ESPECIALLY IN THE BITTERROOT VALLEY. 

* SNOW ACCUMULATIONS: AN ADDITIONAL 1 TO 3 INCHES.

$$

IDZ009-010-041800-
/O.CON.KMSO.WW.Y.0010.000000T0000Z-170204T1800Z/
154 AM MST SAT FEB 4 2017

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

* IMPACTS/TIMING: ANOTHER WEATHER SYSTEM CREATING PERIODS OF 
  SNOW AND SLICK DRIVING CONDITIONS EXPECTED INTO SATURDAY. THE 
  LIGHT SNOW MAY MIX WITH LIGHT FREEZING RAIN. 

* SNOW ACCUMULATIONS: 1 TO 3 INCHES OF SNOW IS EXPECTED IN THE 
  VALLEYS AND 3 TO 6 INCHES IN THE TERRAIN. 

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

$$

145 
WWUS45 KMSO 041009
WSWMSO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
309 AM MST SAT FEB 4 2017

MTZ002-051015-
/O.UPG.KMSO.WS.A.0004.170206T0000Z-170207T0000Z/
/O.NEW.KMSO.WS.W.0006.170205T1800Z-170207T0600Z/
/O.EXT.KMSO.WW.Y.0011.170205T0000Z-170205T1800Z/
/O.CON.KMSO.WS.W.0005.000000T0000Z-170205T0000Z/
309 AM MST SAT FEB 4 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 5 PM THIS AFTERNOON
TO 11 AM MST SUNDAY...
...WINTER STORM WARNING IN EFFECT FROM 11 AM SUNDAY TO 11 PM MST
MONDAY...

THE WINTER STORM WATCH IS NO LONGER IN EFFECT. 

* IMPACTS/TIMING: A COMBINATION OF SNOW THAT FELL FRIDAY AFTERNOON
  AND ADDITIONAL SNOW THAT FELL OVERNIGHT THROUGH THIS MORNING HAS
  CAUSED DANGEROUS DRIVING CONDITIONS. THE MONTANA DEPARTMENT OF
  TRANSPORTATION IS REPORTING SEVERE DRIVING CONDITIONS ON HIGHWAY
  2 FROM WEST GLACIER TO DEVIL CREEK AS OF THIS MORNING. ADDITIONAL
  MODERATE TO HEAVY SNOW WILL CONTINUE THIS MORNING AND ADD TO 
  THE PROBLEM.

* SNOW WILL BECOME LIGHT TO MODERATE LATER TODAY INTO SUNDAY
  MORNING BEFORE ANOTHER EVEN MORE ROBUST WEATHER SYSTEM ARRIVES 
  FOR SUNDAY AFTERNOON THROUGH MONDAY. 

* SUNDAY NIGHT THROUGH MONDAY: VERY HEAVY SNOW WILL COMBINE WITH
  INCREASING EAST WINDS TO CAUSE BLIZZARD-LIKE CONDITIONS. RATES
  OF 1 TO 2 INCHES PER HOUR WILL BE LIKELY. THIS COULD MAKE ROADS
  IMPASSIBLE AT TIMES THROUGH THE MONDAY MORNING COMMUTE. 

* SNOW ACCUMULATIONS: 8 TO 12 INCHES BY THIS MORNING. 6 TO 10
  INCHES OF ADDITIONAL SNOW WILL OCCUR SATURDAY NIGHT THROUGH
  SUNDAY. FURTHER ACCUMULATIONS OF 16 TO 24 INCHES ARE EXPECTED
  FOR SUNDAY THROUGH MONDAY NIGHT. HIGHWAY 2 OVER MARIAS PASS COULD
  SEE A STORM TOTAL SNOWFALL AMOUNT EXCEEDING 50 INCHES.

* WINDS SUNDAY NIGHT THROUGH MONDAY: 15 TO 25 MPH WITH LOCALLY 
  STRONGER GUSTS.


$$

MTZ004-051015-
/O.UPG.KMSO.WS.A.0004.170206T0000Z-170207T0000Z/
/O.NEW.KMSO.WS.W.0006.170205T1800Z-170207T0600Z/
/O.EXT.KMSO.WW.Y.0011.170205T0000Z-170205T1800Z/
/O.CON.KMSO.WS.W.0005.000000T0000Z-170205T0000Z/
309 AM MST SAT FEB 4 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 5 PM THIS AFTERNOON
TO 11 AM MST SUNDAY...
...WINTER STORM WARNING IN EFFECT FROM 11 AM SUNDAY TO 11 PM MST
MONDAY...

THE WINTER STORM WATCH IS NO LONGER IN EFFECT. 

* IMPACTS/TIMING: A COMBINATION OF SNOW THAT FELL FRIDAY AFTERNOON
  AND ADDITIONAL SNOW THAT FELL OVERNIGHT THROUGH THIS MORNING HAS
  CAUSED DANGEROUS DRIVING CONDITIONS. THE MONTANA DEPARTMENT OF
  TRANSPORTATION IS REPORTING SEVERE DRIVING CONDITIONS ON
  INTERSTATE 90 FROM SAINT REGIS TO LOOKOUT PASS AS OF THIS
  MORNING. ADDITIONAL MODERATE TO HEAVY SNOW WILL CONTINUE THIS 
  MORNING AND ADD TO THE PROBLEM. 

* SNOW WILL BECOME LIGHT TO MODERATE LATER TODAY INTO SUNDAY
  MORNING BEFORE ANOTHER EVEN MORE ROBUST WEATHER SYSTEM ARRIVES 
  FOR SUNDAY AFTERNOON THROUGH MONDAY. 

* SUNDAY AFTERNOON THROUGH MONDAY: VERY HEAVY SNOW WILL ONCE AGAIN
  CAUSE TREACHEROUS DRIVING CONDITIONS WITH OCCASIONAL BLOWING AND
  DRIFTING SNOW. SNOWFALL RATES OF 1 TO 2 INCHES AN HOUR COULD 
  MAKE ROADS IMPASSIBLE AT TIMES THROUGH THE MONDAY MORNING 
  COMMUTE.

* SNOW ACCUMULATIONS: 6 TO 10 INCHES BY THIS MORNING FROM HAUGAN
  TO LOOKOUT PASS. AN ADDITIONAL 6 TO 10 INCHES TONIGHT THROUGH SUNDAY
  FROM SALTESE TO LOOKOUT PASS. FURTHER ACCUMULATIONS OF 17 TO 23
  INCHES WILL OCCUR SUNDAY NIGHT THROUGH MONDAY NIGHT FROM 
  SALTESE TO LOOKOUT PASS. 

* WINDS SUNDAY NIGHT THROUGH MONDAY: 15 TO 20 MPH WITH LOCALLY 
  STRONGER GUSTS.

$$

MTZ003-051015-
/O.UPG.KMSO.WS.A.0004.170205T1800Z-170207T0000Z/
/O.NEW.KMSO.WS.W.0006.170205T1800Z-170207T0600Z/
/O.CON.KMSO.WS.W.0005.000000T0000Z-170204T1800Z/
/O.CON.KMSO.WW.Y.0011.170204T1800Z-170205T1800Z/
309 AM MST SAT FEB 4 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 AM THIS
MORNING TO 11 AM MST SUNDAY...
...WINTER STORM WARNING IN EFFECT FROM 11 AM SUNDAY TO 11 PM MST
MONDAY...

THE WINTER STORM WATCH IS NO LONGER IN EFFECT. 

* IMPACTS/TIMING: A COMBINATION OF SNOW THAT FELL FRIDAY AFTERNOON
  AND ADDITIONAL SNOW THAT FELL OVERNIGHT THROUGH THIS MORNING HAS
  CAUSED DANGEROUS DRIVING CONDITIONS. ADDITIONAL MODERATE TO 
  HEAVY SNOW WILL CONTINUE THIS MORNING AND ADD TO THE PROBLEM. 

* SNOW WILL BECOME LIGHT TO MODERATE LATER TODAY INTO SUNDAY
  MORNING BEFORE ANOTHER EVEN MORE ROBUST WEATHER SYSTEM ARRIVES 
  FOR SUNDAY AFTERNOON THROUGH MONDAY. 

* SUNDAY NIGHT THROUGH MONDAY: VERY HEAVY SNOW WILL COMBINE WITH
  INCREASING EAST WINDS TO CAUSE BLIZZARD-LIKE CONDITIONS. RATES
  OF 1 TO 2 INCHES PER HOUR WILL BE LIKELY. THIS COULD MAKE ROADS
  IMPASSIBLE AT TIMES THROUGH THE MONDAY MORNING COMMUTE. 

* SNOW ACCUMULATIONS: 7 TO 10 INCHES BY THIS MORNING. ANOTHER 2 TO
  5 INCHES TONIGHT THROUGH SUNDAY MORNING. FURTHER ACCUMULATIONS OF
  10 TO 16 INCHES WILL OCCUR SUNDAY NIGHT THROUGH MONDAY NIGHT.

* WINDS SUNDAY NIGHT THROUGH MONDAY: 15 TO 25 MPH WITH LOCALLY 
  STRONGER GUSTS.


$$

MTZ001-051015-
/O.UPG.KMSO.WS.A.0004.170205T1800Z-170207T0000Z/
/O.NEW.KMSO.WS.W.0006.170205T1800Z-170207T0600Z/
/O.CON.KMSO.WS.W.0005.000000T0000Z-170204T1800Z/
/O.CON.KMSO.WW.Y.0011.170204T1800Z-170205T1800Z/
309 AM MST SAT FEB 4 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 AM THIS
MORNING TO 11 AM MST SUNDAY...
...WINTER STORM WARNING IN EFFECT FROM 11 AM SUNDAY TO 11 PM MST
MONDAY...

THE WINTER STORM WATCH IS NO LONGER IN EFFECT. 

* IMPACTS/TIMING: A COMBINATION OF SNOW THAT FELL FRIDAY AFTERNOON
  AND ADDITIONAL SNOW THAT FELL OVERNIGHT THROUGH THIS MORNING HAS
  CAUSED DANGEROUS DRIVING CONDITIONS. ADDITIONAL MODERATE TO 
HEAVY SNOW WILL CONTINUE THIS MORNING AND ADD TO THE PROBLEM. 

* SNOW WILL BECOME LIGHT TO MODERATE LATER TODAY INTO SUNDAY
  MORNING BEFORE ANOTHER EVEN MORE ROBUST WEATHER SYSTEM ARRIVES 
FOR SUNDAY AFTERNOON THROUGH MONDAY. 

* SUNDAY NIGHT THROUGH MONDAY: VERY HEAVY SNOW WILL COMBINE WITH
  INCREASING EAST WINDS TO CAUSE LOCALIZED BLIZZARD-LIKE CONDITIONS.
  RATES OF 1 TO 2 INCHES PER HOUR WILL BE LIKELY. THIS COULD MAKE
  ROADS IMPASSIBLE AT TIMES THROUGH THE MONDAY MORNING COMMUTE. 

* SNOW ACCUMULATIONS: 7 TO 10 INCHES BY THIS MORNING. ANOTHER 3 TO
  5 INCHES TONIGHT THROUGH SUNDAY MORNING. FURTHER ACCUMULATIONS O F
  6 TO 12 INCHES WILL OCCUR SUNDAY NIGHT THROUGH MONDAY NIGHT. 
  YAAK, TROY, NOXON COULD SEE LESSER AMOUNTS OF 4 TO 6 INCHES 
  DURING THAT TIME.

* WINDS SUNDAY NIGHT THROUGH MONDAY: 15 TO 20 MPH WITH LOCALLY 
  STRONGER GUSTS.


$$

MTZ043-051015-
/O.UPG.KMSO.WS.A.0004.170205T1800Z-170207T0000Z/
/O.NEW.KMSO.WS.W.0006.170205T1800Z-170207T0600Z/
/O.CON.KMSO.WW.Y.0010.000000T0000Z-170205T1800Z/
309 AM MST SAT FEB 4 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
SUNDAY...
...WINTER STORM WARNING IN EFFECT FROM 11 AM SUNDAY TO 11 PM MST
MONDAY...

THE WINTER STORM WATCH IS NO LONGER IN EFFECT. 

* IMPACTS/TIMING: PERIODS OF LIGHT TO MODERATE SNOW ARE EXPECTED
  TODAY INTO SUNDAY MORNING PRODUCING SLICK DRIVING CONDITIONS. 

* HEAVIER SNOW WILL OCCUR SUNDAY AFTERNOON THROUGH MONDAY WITH
  SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR. LOCALIZED BLOWING AND
  DRIFTING SNOW IS LIKELY. TREACHEROUS DRIVING CONDITIONS SHOULD
  BE EXPECTED THROUGH THE MONDAY MORNING COMMUTE.

* SNOW ACCUMULATIONS: 4 TO 7 INCHES OF SNOW BY THIS MORNING. AN
  ADDITIONAL 3 TO 5 INCHES TONIGHT THROUGH SUNDAY. FURTHER
  ACCUMULATIONS OF 8 TO 12 INCHES SUNDAY AFTERNOON THROUGH MONDAY.
  LESSER AMOUNTS OF 4 TO 6 INCHES TO OCCUR ALONG I-90 FROM EAST 
  MISSOULA TO BEARMOUTH AND ALONG HIGHWAY 200 FROM BONNER TO 
  GREENOUGH.

$$

IDZ007-041800-
/O.CON.KMSO.WW.Y.0010.000000T0000Z-170204T1800Z/
209 AM PST SAT FEB 4 2017

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

* IMPACTS/TIMING: A MIX OF SNOW, RAIN, AND POCKETS OF FREEZING
  RAIN WILL CONTINUE TO CREATE A THREAT FOR DIFFICULT DRIVING
  CONDITIONS THROUGH THE MORNING HOURS.

$$

IDZ005-006-MTZ006-051015-
/O.CON.KMSO.WW.Y.0010.000000T0000Z-170205T1800Z/
309 AM MST SAT FEB 4 2017 /209 AM PST SAT FEB 4 2017/

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
/10 AM PST/ SUNDAY...

* IMPACTS/TIMING: PERIODS OF SNOW AND POCKETS OF FREEZING RAIN ARE
  EXPECTED NOW THROUGH SUNDAY. SNOW MAY BECOME MODERATE TO HEAVY
  AT TIMES OVER THE HIGHER TERRAIN CAUSING REDUCED VISIBILITY TO
  LESS THAN 1/2 MILE. IT SHOULD BE NOTED THAT THIS IS A PROLONGED
  MODERATE INTENSITY SNOW EVENT RATHER THAN INTENSE SHORT PERIOD 
  OF SNOW. 

* SNOW ACCUMULATIONS: STORM TOTAL SNOW AMOUNTS OF 1 TO 2 FEET EXPECTED
  OVER THE HIGHER TERRAIN AND OVER MOUNTAIN PASSES (MAINLY 
  HIGHWAY 12 OVER LOLO PASS) BY SUNDAY MORNING. 

* LOCATIONS IMPACTED INCLUDE: ELK RIVER, HIGHWAY 11 PIERCE TO 
  HEADQUARTERS, PIERCE, DIXIE, ELK CITY, HIGHWAY 12 LOWELL TO 
  LOLO PASS, HIGHWAY 93 SULA TO LOST TRAIL PASS, AND LOLO PASS

$$

MTZ005-041800-
/O.CON.KMSO.WW.Y.0010.000000T0000Z-170204T1800Z/
309 AM MST SAT FEB 4 2017

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

* IMPACTS/TIMING: PERIODS OF MODERATE SNOW WILL REDUCE VISIBILITY
  AND DEGRADE ROAD CONDITIONS THIS MORNING. SNOW MAY TRANSITION 
  TO LIGHT FREEZING RAIN AND ICE PELLETS AT TIMES, ESPECIALLY IN 
  THE BITTERROOT VALLEY. 

* SNOW ACCUMULATIONS: TOTAL OF 3 TO 6 INCHES.

$$

IDZ009-010-MTZ007-041800-
/O.CON.KMSO.WW.Y.0010.000000T0000Z-170204T1800Z/
309 AM MST SAT FEB 4 2017

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

* IMPACTS/TIMING: MODERATE TO HEAVY SNOW HAS DEVELOPED IN AN AREA
  FROM GEORGETOWN LAKE TO DRUMMOND ALONG HIGHWAY 1 AND FROM
  CLEARWATER JUNCTION TO OVANDO ON HIGHWAY 200. THESE BANDS HAVE A  
  HISTORY OF PRODUCING OVER 1 INCH PER HOUR SNOW RATES. 

* SNOW ACCUMULATIONS: 2 TO 5 INCHES OF SNOW IS EXPECTED IN THE
  VALLEYS AND 3 TO 6 INCHES IN THE TERRAIN. 


$$

005 
WWUS45 KMSO 041025
WSWMSO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
325 AM MST SAT FEB 4 2017

MTZ005-041800-
/O.UPG.KMSO.WW.Y.0010.000000T0000Z-170204T1800Z/
/O.EXA.KMSO.WS.W.0005.000000T0000Z-170204T1800Z/
325 AM MST SAT FEB 4 2017

...WINTER STORM WARNING IN EFFECT UNTIL 11 AM MST THIS MORNING
FOR BITTERROOT VALLEY AND MISSOULA...

THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. 

* IMPACTS/TIMING: PERIODS OF MODERATE TO HEAVY SNOW HAS CREATED
  VERY POOR ROAD CONDITIONS IN MISSOULA...SOUTH THROUGH THE
  BITTERROOT VALLEY. THE MONTANA DEPARTMENT OF TRANSPORTATION IS
  NOW REPORTING SEVERE DRIVING CONDITIONS ALONG HIGHWAY 93 FROM
  MISSOULA THROUGH THE BITTERROOT VALLEY.


* SNOW ACCUMULATIONS: ADDITIONAL 2 TO 5 INCHES THROUGH LATE
  MORNING.

$$

MTZ002-051030-
/O.CON.KMSO.WS.W.0005.000000T0000Z-170205T0000Z/
/O.CON.KMSO.WS.W.0006.170205T1800Z-170207T0600Z/
/O.CON.KMSO.WW.Y.0011.170205T0000Z-170205T1800Z/
325 AM MST SAT FEB 4 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS
AFTERNOON TO 11 AM MST SUNDAY...
...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 AM SUNDAY TO
11 PM MST MONDAY...

THE WINTER STORM WATCH IS NO LONGER IN EFFECT.

* IMPACTS/TIMING: A COMBINATION OF SNOW THAT FELL FRIDAY 
  AFTERNOON AND ADDITIONAL SNOW THAT FELL OVERNIGHT THROUGH THIS 
  MORNING HAS CAUSED DANGEROUS DRIVING CONDITIONS. THE MONTANA 
  DEPARTMENT OF TRANSPORTATION IS REPORTING SEVERE DRIVING 
  CONDITIONS ON HIGHWAY 2 FROM WEST GLACIER TO DEVIL CREEK AS OF 
  THIS MORNING. ADDITIONAL MODERATE TO HEAVY SNOW WILL CONTINUE 
  THIS MORNING AND ADD TO THE PROBLEM. 

* SNOW WILL BECOME LIGHT TO MODERATE LATER TODAY INTO SUNDAY 
  MORNING BEFORE ANOTHER EVEN MORE ROBUST WEATHER SYSTEM ARRIVES 
  FOR SUNDAY AFTERNOON THROUGH MONDAY. 

* SUNDAY NIGHT THROUGH MONDAY: VERY HEAVY SNOW WILL COMBINE WITH 
  INCREASING EAST WINDS TO CAUSE BLIZZARD-LIKE CONDITIONS. RATES 
  OF 1 TO 2 INCHES PER HOUR WILL BE LIKELY. THIS COULD MAKE 
  ROADS IMPASSIBLE AT TIMES THROUGH THE MONDAY MORNING COMMUTE. 

* SNOW ACCUMULATIONS: 8 TO 12 INCHES BY THIS MORNING. 6 TO 10 
  INCHES OF ADDITIONAL SNOW WILL OCCUR SATURDAY NIGHT THROUGH 
  SUNDAY. FURTHER ACCUMULATIONS OF 16 TO 24 INCHES ARE EXPECTED 
  FOR SUNDAY THROUGH MONDAY NIGHT. HIGHWAY 2 OVER MARIAS PASS 
  COULD SEE A STORM TOTAL SNOWFALL AMOUNT EXCEEDING 50 INCHES. 

* WINDS SUNDAY NIGHT THROUGH MONDAY: 15 TO 25 MPH WITH LOCALLY 
  STRONGER GUSTS. 

$$

MTZ004-051030-
/O.CON.KMSO.WS.W.0005.000000T0000Z-170205T0000Z/
/O.CON.KMSO.WS.W.0006.170205T1800Z-170207T0600Z/
/O.CON.KMSO.WW.Y.0011.170205T0000Z-170205T1800Z/
325 AM MST SAT FEB 4 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS
AFTERNOON TO 11 AM MST SUNDAY...
...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 AM SUNDAY TO
11 PM MST MONDAY...

THE WINTER STORM WATCH IS NO LONGER IN EFFECT.

* IMPACTS/TIMING: A COMBINATION OF SNOW THAT FELL FRIDAY 
  AFTERNOON AND ADDITIONAL SNOW THAT FELL OVERNIGHT THROUGH THIS 
  MORNING HAS CAUSED DANGEROUS DRIVING CONDITIONS. THE MONTANA 
  DEPARTMENT OF TRANSPORTATION IS REPORTING SEVERE DRIVING 
  CONDITIONS ON INTERSTATE 90 FROM SAINT REGIS TO LOOKOUT PASS 
  AS OF THIS MORNING. ADDITIONAL MODERATE TO HEAVY SNOW WILL 
  CONTINUE THIS MORNING AND ADD TO THE PROBLEM. 

* SNOW WILL BECOME LIGHT TO MODERATE LATER TODAY INTO SUNDAY 
  MORNING BEFORE ANOTHER EVEN MORE ROBUST WEATHER SYSTEM ARRIVES 
  FOR SUNDAY AFTERNOON THROUGH MONDAY. 

* SUNDAY AFTERNOON THROUGH MONDAY: VERY HEAVY SNOW WILL ONCE 
  AGAIN CAUSE TREACHEROUS DRIVING CONDITIONS WITH OCCASIONAL 
  BLOWING AND DRIFTING SNOW. SNOWFALL RATES OF 1 TO 2 INCHES AN 
  HOUR COULD MAKE ROADS IMPASSIBLE AT TIMES THROUGH THE MONDAY 
  MORNING COMMUTE. 

* SNOW ACCUMULATIONS: 6 TO 10 INCHES BY THIS MORNING FROM HAUGAN 
  TO LOOKOUT PASS. AN ADDITIONAL 6 TO 10 INCHES TONIGHT THROUGH 
  SUNDAY FROM SALTESE TO LOOKOUT PASS. FURTHER ACCUMULATIONS OF 
  17 TO 23 INCHES WILL OCCUR SUNDAY NIGHT THROUGH MONDAY NIGHT 
  FROM SALTESE TO LOOKOUT PASS. 

* WINDS SUNDAY NIGHT THROUGH MONDAY: 15 TO 20 MPH WITH LOCALLY 
  STRONGER GUSTS. 

$$

MTZ003-051030-
/O.CON.KMSO.WS.W.0005.000000T0000Z-170204T1800Z/
/O.CON.KMSO.WS.W.0006.170205T1800Z-170207T0600Z/
/O.CON.KMSO.WW.Y.0011.170204T1800Z-170205T1800Z/
325 AM MST SAT FEB 4 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 AM THIS
MORNING TO 11 AM MST SUNDAY...
...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 AM SUNDAY TO
11 PM MST MONDAY...

THE WINTER STORM WATCH IS NO LONGER IN EFFECT.

* IMPACTS/TIMING: A COMBINATION OF SNOW THAT FELL FRIDAY 
  AFTERNOON AND ADDITIONAL SNOW THAT FELL OVERNIGHT THROUGH THIS 
  MORNING HAS CAUSED DANGEROUS DRIVING CONDITIONS. ADDITIONAL 
  MODERATE TO HEAVY SNOW WILL CONTINUE THIS MORNING AND ADD TO 
  THE PROBLEM. 

* SNOW WILL BECOME LIGHT TO MODERATE LATER TODAY INTO SUNDAY 
  MORNING BEFORE ANOTHER EVEN MORE ROBUST WEATHER SYSTEM ARRIVES 
  FOR SUNDAY AFTERNOON THROUGH MONDAY. 

* SUNDAY NIGHT THROUGH MONDAY: VERY HEAVY SNOW WILL COMBINE WITH 
  INCREASING EAST WINDS TO CAUSE BLIZZARD-LIKE CONDITIONS. RATES 
  OF 1 TO 2 INCHES PER HOUR WILL BE LIKELY. THIS COULD MAKE 
  ROADS IMPASSIBLE AT TIMES THROUGH THE MONDAY MORNING COMMUTE. 

* SNOW ACCUMULATIONS: 7 TO 10 INCHES BY THIS MORNING. ANOTHER 2 
  TO 5 INCHES TONIGHT THROUGH SUNDAY MORNING. FURTHER 
  ACCUMULATIONS OF 10 TO 16 INCHES WILL OCCUR SUNDAY NIGHT 
  THROUGH MONDAY NIGHT. 

* WINDS SUNDAY NIGHT THROUGH MONDAY: 15 TO 25 MPH WITH LOCALLY 
  STRONGER GUSTS. 

$$

MTZ001-051030-
/O.CON.KMSO.WS.W.0005.000000T0000Z-170204T1800Z/
/O.CON.KMSO.WS.W.0006.170205T1800Z-170207T0600Z/
/O.CON.KMSO.WW.Y.0011.170204T1800Z-170205T1800Z/
325 AM MST SAT FEB 4 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 AM THIS
MORNING TO 11 AM MST SUNDAY...
...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 AM SUNDAY TO
11 PM MST MONDAY...

THE WINTER STORM WATCH IS NO LONGER IN EFFECT.

* IMPACTS/TIMING: A COMBINATION OF SNOW THAT FELL FRIDAY 
  AFTERNOON AND ADDITIONAL SNOW THAT FELL OVERNIGHT THROUGH THIS 
  MORNING HAS CAUSED DANGEROUS DRIVING CONDITIONS. ADDITIONAL 
  MODERATE TO HEAVY SNOW WILL CONTINUE THIS MORNING AND ADD TO 
  THE PROBLEM. 

* SNOW WILL BECOME LIGHT TO MODERATE LATER TODAY INTO SUNDAY 
  MORNING BEFORE ANOTHER EVEN MORE ROBUST WEATHER SYSTEM ARRIVES 
  FOR SUNDAY AFTERNOON THROUGH MONDAY. 

* SUNDAY NIGHT THROUGH MONDAY: VERY HEAVY SNOW WILL COMBINE WITH 
  INCREASING EAST WINDS TO CAUSE LOCALIZED BLIZZARD-LIKE 
  CONDITIONS. RATES OF 1 TO 2 INCHES PER HOUR WILL BE LIKELY. 
  THIS COULD MAKE ROADS IMPASSIBLE AT TIMES THROUGH THE MONDAY 
  MORNING COMMUTE. 

* SNOW ACCUMULATIONS: 7 TO 10 INCHES BY THIS MORNING. ANOTHER 3 
  TO 5 INCHES TONIGHT THROUGH SUNDAY MORNING. FURTHER 
  ACCUMULATIONS O F 6 TO 12 INCHES WILL OCCUR SUNDAY NIGHT 
  THROUGH MONDAY NIGHT. YAAK, TROY, NOXON COULD SEE LESSER 
  AMOUNTS OF 4 TO 6 INCHES DURING THAT TIME. 

* WINDS SUNDAY NIGHT THROUGH MONDAY: 15 TO 20 MPH WITH LOCALLY 
  STRONGER GUSTS. 

$$

MTZ043-051030-
/O.CON.KMSO.WS.W.0006.170205T1800Z-170207T0600Z/
/O.CON.KMSO.WW.Y.0010.000000T0000Z-170205T1800Z/
325 AM MST SAT FEB 4 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
SUNDAY...
...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 AM SUNDAY TO
11 PM MST MONDAY...

THE WINTER STORM WATCH IS NO LONGER IN EFFECT.

* IMPACTS/TIMING: PERIODS OF LIGHT TO MODERATE SNOW ARE EXPECTED 
  TODAY INTO SUNDAY MORNING PRODUCING SLICK DRIVING CONDITIONS. 

* HEAVIER SNOW WILL OCCUR SUNDAY AFTERNOON THROUGH MONDAY WITH 
  SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR. LOCALIZED BLOWING 
  AND DRIFTING SNOW IS LIKELY. TREACHEROUS DRIVING CONDITIONS 
  SHOULD BE EXPECTED THROUGH THE MONDAY MORNING COMMUTE. 

* SNOW ACCUMULATIONS: 4 TO 7 INCHES OF SNOW BY THIS MORNING. AN 
  ADDITIONAL 3 TO 5 INCHES TONIGHT THROUGH SUNDAY. FURTHER 
  ACCUMULATIONS OF 8 TO 12 INCHES SUNDAY AFTERNOON THROUGH 
  MONDAY. LESSER AMOUNTS OF 4 TO 6 INCHES TO OCCUR ALONG I-90 
  FROM EAST MISSOULA TO BEARMOUTH AND ALONG HIGHWAY 200 FROM 
  BONNER TO GREENOUGH. 

$$

IDZ007-041800-
/O.CON.KMSO.WW.Y.0010.000000T0000Z-170204T1800Z/
225 AM PST SAT FEB 4 2017

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

* IMPACTS/TIMING: A MIX OF SNOW, RAIN, AND POCKETS OF FREEZING 
  RAIN WILL CONTINUE TO CREATE A THREAT FOR DIFFICULT DRIVING 
  CONDITIONS THROUGH THE MORNING HOURS. 

$$

IDZ005-006-MTZ006-051030-
/O.CON.KMSO.WW.Y.0010.000000T0000Z-170205T1800Z/
325 AM MST SAT FEB 4 2017 /225 AM PST SAT FEB 4 2017/

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
/10 AM PST/ SUNDAY...

* IMPACTS/TIMING: PERIODS OF SNOW AND POCKETS OF FREEZING RAIN 
  ARE EXPECTED NOW THROUGH SUNDAY. SNOW MAY BECOME MODERATE TO 
  HEAVY AT TIMES OVER THE HIGHER TERRAIN CAUSING REDUCED 
  VISIBILITY TO LESS THAN 1/2 MILE. IT SHOULD BE NOTED THAT THIS 
  IS A PROLONGED MODERATE INTENSITY SNOW EVENT RATHER THAN 
  INTENSE SHORT PERIOD OF SNOW. 

* SNOW ACCUMULATIONS: STORM TOTAL SNOW AMOUNTS OF 1 TO 2 FEET 
  EXPECTED OVER THE HIGHER TERRAIN AND OVER MOUNTAIN PASSES 
  (MAINLY HIGHWAY 12 OVER LOLO PASS) BY SUNDAY MORNING. 

* LOCATIONS IMPACTED INCLUDE: ELK RIVER, HIGHWAY 11 PIERCE TO 
  HEADQUARTERS, PIERCE, DIXIE, ELK CITY, HIGHWAY 12 LOWELL TO 
  LOLO PASS, HIGHWAY 93 SULA TO LOST TRAIL PASS, AND LOLO PASS

$$

IDZ009-010-MTZ007-041800-
/O.CON.KMSO.WW.Y.0010.000000T0000Z-170204T1800Z/
325 AM MST SAT FEB 4 2017

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

* IMPACTS/TIMING: MODERATE TO HEAVY SNOW HAS DEVELOPED IN AN 
  AREA FROM GEORGETOWN LAKE TO DRUMMOND ALONG HIGHWAY 1 AND FROM 
  CLEARWATER JUNCTION TO OVANDO ON HIGHWAY 200. THESE BANDS HAVE 
  A HISTORY OF PRODUCING OVER 1 INCH PER HOUR SNOW RATES. 

* SNOW ACCUMULATIONS: 2 TO 5 INCHES OF SNOW IS EXPECTED IN THE 
  VALLEYS AND 3 TO 6 INCHES IN THE TERRAIN. 

$$

Area Forecast Discussion
National Weather Service Missoula MT
243 PM MST Fri Feb 3 2017

...PROLONGED SNOW ACROSS NORTHERN ROCKIES THROUGH MONDAY...

.DISCUSSION...The first pulse of moisture and energy is making its
way across the Northern Rockies today causing widespread snow with
periods of moderate snowfall rates. This southwesterly upper
level flow will persist over the Northern Rockies with fairly
steady precipitation falling in the higher terrain, especially
from Clearwater County up into northwest Montana. Several more
weak disturbances will make its way across the region through the
weekend with the most intense one being Sunday afternoon and
night. Winter weather advisories have been issued for most of the
Northern Rockies today through Sunday morning, then a Winter Storm
Watch for the potential period of heavier snowfall.

This southwesterly flow will allow a warmer airmass to be ushered
into the region allowing most of the valleys of north central
Idaho and west central Montana to mix out the cold air. During the
process of warmer air making it to valley bottom, the
precipitation will change from snow to potentially freezing rain
and finally rain. These pockets of freezing rain could create
slick road conditions. Another concern for the warm up in the
valleys, especially around Grangeville/Orofino and the Bitterroot
Valley, will be the snow melt causing urban water issues.
Northwest Montana does not appear to have enough warm air for this
transition so the precipitation type will likely remain all snow.

A cold front makes its way across the Northern Rockies on Monday
causing snow levels to drop to most valley bottoms. Precipitation
will be enhanced along the leading edge of the front on Monday.
The exact timing of the front is still uncertain.

Snow showers will linger across the Northern Rockies during
Tuesday. However, accumulations will be much less noteworthy than
the previous snow event. Temperatures will remain fairly wintry,
though not bitterly cold.

A major warming pattern change is anticipated to take place
across the Northern Rockies Wednesday through Friday. On
Wednesday, high pressure will surge across the Northern Rockies
from the south, accompanied by a minor surge of moisture.
Precipitation across the region will begin mainly as light snow,
however as the air aloft warms, the pattern changes to favor snow
changing to freezing rain in many area valleys. The freezing rain
impact will be most significant for high and mid elevations
valleys, where temperatures have been below freezing for much of
the past couple months. Hazardous travel conditions with slippery
roads will be present during this warming transition. A secondary
effect of the rapid warming across the region will also allow low
elevation snow to melt at a fast rate. Considering the relatively
deep low elevation snow pack near population centers, the melt-off
will lead to ponding of water near buildings and across low lying
roadways. Basement flooding from the melt-off is also possible,
whether over the ground or percolation through the frost layer in
the ground. This scenario appears similar to the rapid low
elevation melting that occurred toward the end of winter 2014.

Conditions are anticipated to cool once again by next weekend,
however not anything as cold as most of December and January.
Expect low elevation snow pack to continuing melting and creating
ponding and flooding issues through mid February.

&&

.AVIATION...Southwesterly flow will persist over the Northern
Rockies through the weekend causing widespread precipitation. Weak
disturbances will be making its way through this flow which will
enhance the snowfall rates. KGPI and KMSO will have the biggest
impact for lowered visibilities and ceilings during the snowfall
enhancement. In addition, KMSO could experience periods of
freezing rain by Friday night.

&&

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

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

     Winter Storm Watch from Sunday morning through Monday afternoon
     Lower Clark Fork Region.

     Winter Weather Advisory until 11 AM MST Sunday Flathead/Mission
     Valleys...Kootenai/Cabinet Region...West Glacier Region.

     Winter Storm Watch from Sunday morning through Monday afternoon
     Flathead/Mission Valleys...Kootenai/Cabinet Region...West
     Glacier Region.

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

     Winter Storm Watch from Sunday morning through Monday afternoon
     Potomac/Seeley Lake Region.

     Winter Weather Advisory until 11 AM MST Saturday
     Missoula/Bitterroot Valleys.

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

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

     Winter Weather Advisory until 10 AM PST Saturday
     Orofino/Grangeville Region.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
521 PM MST FRI FEB 3 2017

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

0520 PM     SNOW             2 WSW COLUMBIA FALLS    48.37N 114.21W
02/03/2017  M4.0 INCH        FLATHEAD           MT   TRAINED SPOTTER

            . THE DURATION OF THE SNOW EVENT WAS 2 HOURS
            30 MINUTES.

&&

NWS MISSOULA MT
IRIS SYSTEM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
523 PM MST FRI FEB 3 2017

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

0430 PM     SNOW             1 SW COLUMBIA FALLS     48.36N 114.20W
02/03/2017  M5.0 INCH        FLATHEAD           MT   TRAINED SPOTTER

            .

&&

NWS MISSOULA MT
IRIS SYSTEM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
732 PM MST FRI FEB 3 2017

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

0732 PM     SNOW             BIGFORK                 48.06N 114.07W
02/03/2017  E3.0 INCH        FLATHEAD           MT   PUBLIC

            .

&&

NWS MISSOULA MT
IRIS SYSTEM