990  
WWUS45 KMSO 181752  
WSWMSO  
 
URGENT - WINTER WEATHER MESSAGE  
NATIONAL WEATHER SERVICE MISSOULA MT  
1052 AM MST THU JAN 18 2018  
 
MTZ043-191800-  
/O.EXP.KMSO.WW.Y.0007.000000T0000Z-180118T1800Z/  
/O.CON.KMSO.WW.Y.0008.180119T0000Z-180119T1800Z/  
POTOMAC/SEELEY LAKE REGION-  
1052 AM MST THU JAN 18 2018  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS  
AFTERNOON TO 11 AM MST FRIDAY...  
...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS  
MORNING...  
 
* WHAT...WET SNOW WILL OCCUR AND SOLIDIFY INTO PACKED ICE WITH  
COOLING TEMPERATURES INTO THE OVERNIGHT HOURS CAUSING SLIPPERY  
CONDITIONS. TOTAL SNOW ACCUMULATIONS OF 1 TO 2 INCHES.  
 
* WHERE...HIGHWAY 200 BONNER TO GREENOUGH, HIGHWAY 83 SEELEY  
LAKE TO CONDON, AND I-90 EAST MISSOULA TO BEARMOUTH.  
 
* WHEN...FROM 5 PM THIS AFTERNOON TO 11 AM MST FRIDAY.  
 
* ADDITIONAL DETAILS...BE PREPARED FOR REDUCED VISIBILITIES AT  
TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER WEATHER ADVISORY FOR SNOW MEANS PERIODS OF SNOW WILL  
CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED  
ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING.  
THE LATEST ROAD CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN  
BE OBTAINED BY CALLING 5 1 1.  
 

 
 
MTZ001-181900-  
/O.EXP.KMSO.WW.Y.0007.000000T0000Z-180118T1800Z/  
KOOTENAI/CABINET REGION-  
1052 AM MST THU JAN 18 2018  
 
...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS  
MORNING...  
 

 
 
MTZ002-181900-  
/O.EXP.KMSO.WW.Y.0007.000000T0000Z-180118T1800Z/  
WEST GLACIER REGION-  
1052 AM MST THU JAN 18 2018  
 
...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS  
MORNING...  
 

 
 
MTZ003-181900-  
/O.EXP.KMSO.WW.Y.0007.000000T0000Z-180118T1800Z/  
FLATHEAD/MISSION VALLEYS-  
1052 AM MST THU JAN 18 2018  
 
...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS  
MORNING...  
 

 
 
MTZ004-181900-  
/O.EXP.KMSO.WW.Y.0007.000000T0000Z-180118T1800Z/  
LOWER CLARK FORK REGION-  
1052 AM MST THU JAN 18 2018  
 
...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS  
MORNING...  
 

 
 
MTZ005-181900-  
/O.EXP.KMSO.WW.Y.0007.000000T0000Z-180118T1800Z/  
MISSOULA/BITTERROOT VALLEYS-  
1052 AM MST THU JAN 18 2018  
 
...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS  
MORNING...  
 

 
 
MTZ006-191800-  
/O.CON.KMSO.WW.Y.0008.180119T0000Z-180119T1800Z/  
BITTERROOT/SAPPHIRE MOUNTAINS-  
1052 AM MST THU JAN 18 2018  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS  
AFTERNOON TO 11 AM MST FRIDAY...  
 
* WHAT...SNOW EXPECTED. PLAN ON SLIPPERY CONDITIONS. TOTAL SNOW  
ACCUMULATIONS OF 4 TO 8 INCHES.  
 
* WHERE...BITTERROOT/SAPPHIRE MOUNTAINS INCLUDING LOLO PASS AND  
LOST TRAIL PASS.  
 
* WHEN...FROM 5 PM THURSDAY TO 11 AM MST FRIDAY.  
 
* ADDITIONAL DETAILS...BE PREPARED FOR REDUCED VISIBILITIES AT  
TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER WEATHER ADVISORY FOR SNOW MEANS PERIODS OF SNOW WILL  
CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED  
ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING.  
THE LATEST ROAD CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN  
BE OBTAINED BY CALLING 5 1 1.  
 

 
 
MTZ007-191800-  
/O.CON.KMSO.WW.Y.0008.180119T0000Z-180119T1800Z/  
BUTTE/BLACKFOOT REGION-  
1052 AM MST THU JAN 18 2018  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS  
AFTERNOON TO 11 AM MST FRIDAY...  
 
* WHAT...SNOW EXPECTED. PLAN ON SLIPPERY ROAD CONDITIONS. TOTAL  
SNOW ACCUMULATIONS OF 1 TO 3 INCHES, WITH UP TO 6 INCHES AT  
GEORGETOWN LAKE ARE EXPECTED.  
 
* WHERE...GEORGETOWN LAKE, HIGHWAY 12 GARRISON TO ELLISTON AND  
MACDONALD PASS, INTERSTATE 90 BETWEEN DRUMMOND, BUTTE AND  
HOMESTAKE PASS.  
 
* WHEN...COLD FRONT WILL BRING AN INTENSE PERIOD OF SNOW, LOW  
VISIBILITY AND GUSTY WINDS TO 25 MPH AT GEORGETOWN LAKE BY 7  
PM, MACDONALD PASS BY 9 PM, BUTTE BY 11 PM THURSDAY.  
 
* ADDITIONAL DETAILS...BE PREPARED FOR REDUCED VISIBILITIES AT  
TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER WEATHER ADVISORY FOR SNOW MEANS PERIODS OF SNOW WILL  
CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED  
ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING.  
THE LATEST ROAD CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN  
BE OBTAINED BY CALLING 5 1 1.  
 

 
 
IDZ006-191800-  
/O.CON.KMSO.WW.Y.0008.180119T0000Z-180119T1800Z/  
SOUTHERN CLEARWATER MOUNTAINS-  
952 AM PST THU JAN 18 2018  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS  
AFTERNOON TO 10 AM PST FRIDAY...  
 
* WHAT...SNOW EXPECTED. PLAN ON SLIPPERY TRAVEL CONDITIONS.  
TOTAL SNOW ACCUMULATIONS OF 1 TO 3 INCHES ACROSS LOWER  
ELEVATIONS AND 4 TO 8 INCHES IN THE HIGHER ELEVATIONS  
INCLUDING ELK CITY AND DIXIE.  
 
* WHERE...DIXIE, ELK CITY, AND HIGHWAY 12 LOWELL TO LOLO PASS.  
 
* WHEN...FROM 4 PM THURSDAY TO 10 AM PST FRIDAY.  
 
* ADDITIONAL DETAILS...BE PREPARED FOR REDUCED VISIBILITIES AT  
TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER WEATHER ADVISORY FOR SNOW MEANS PERIODS OF SNOW WILL  
CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED  
ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING.  
THE LATEST ROAD CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN  
BE OBTAINED BY CALLING 5 1 1.  
 

 
 
IDZ010-191800-  
/O.CON.KMSO.WW.Y.0008.180119T0300Z-180119T1800Z/  
EASTERN LEMHI COUNTY-  
1052 AM MST THU JAN 18 2018  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS  
EVENING TO 11 AM MST FRIDAY...  
 
* WHAT...SNOW EXPECTED. PLAN ON SLIPPERY ROAD CONDITIONS. TOTAL  
SNOW ACCUMULATIONS OF AROUND 1 INCH IN SALMON, 1 TO 2 INCHES  
BETWEEN LEADORE AND GILMORE SUMMIT ON HIGHWAY 28, AND 4 TO 8  
INCHES TOWARDS LOST TRAIL PASS ON US-93.  
 
* WHERE...OTHER PLACES INCLUDE BANNOCK PASS, LEMHI PASS, AND  
SALMON.  
 
* WHEN...FROM 8 PM THURSDAY TO 11 AM MST FRIDAY.  
 
* ADDITIONAL DETAILS...BE PREPARED FOR REDUCED VISIBILITIES AT  
TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER WEATHER ADVISORY FOR SNOW MEANS PERIODS OF SNOW WILL  
CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED  
ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING.  
THE LATEST ROAD CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN  
BE OBTAINED BY CALLING 5 1 1.  
 

 
 
IDZ009-191800-  
/O.CON.KMSO.WW.Y.0008.180119T0000Z-180119T1800Z/  
WESTERN LEMHI COUNTY-  
1052 AM MST THU JAN 18 2018  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS  
AFTERNOON TO 11 AM MST FRIDAY...  
 
* WHAT...SNOW EXPECTED. PLAN ON DIFFICULT TRAVEL CONDITIONS IN  
THE BACK ROADS. TOTAL SNOW ACCUMULATIONS OF LESS THAN 1 INCH  
ALONG SALMON RIVER ROAD AND 4 TO 7 INCHES ELSEWHERE, WITH  
LOCALIZED AMOUNTS UP TO 10 INCHES, ARE EXPECTED.  
 
* WHERE...WESTERN LEMHI COUNTY INCLUDING WILLIAM'S CREEK SUMMIT.  
 
* WHEN...FROM 5 PM THURSDAY TO 11 AM MST FRIDAY.  
 
* ADDITIONAL DETAILS...BE PREPARED FOR REDUCED VISIBILITIES AT  
TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER WEATHER ADVISORY FOR SNOW MEANS PERIODS OF SNOW WILL  
CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED  
ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING.  
THE LATEST ROAD CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN  
BE OBTAINED BY CALLING 5 1 1.  
 

 
 
IDZ007-191800-  
/O.CON.KMSO.WW.Y.0008.180119T0000Z-180119T1800Z/  
OROFINO/GRANGEVILLE REGION-  
952 AM PST THU JAN 18 2018  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS  
AFTERNOON TO 10 AM PST FRIDAY ABOVE 3000 FEET...  
 
* WHAT...SNOW EXPECTED. PLAN ON SLIPPERY ROAD CONDITIONS. TOTAL  
SNOW ACCUMULATIONS OF 1 TO 2 INCHES WITH ISOLATED AMOUNTS UP TO  
3 INCHES ARE EXPECTED THIS EVENING, WITH AN ADDITIONAL 2 TO 3  
INCHES POSSIBLE OVERNIGHT INTO FRIDAY MORNING.  
 
* WHERE...GRANGEVILLE AND CAMAS PRAIRIE REGION.  
 
* WHEN...FROM 4 PM THURSDAY TO 10 AM PST FRIDAY.  
 
* ADDITIONAL DETAILS...BE PREPARED FOR REDUCED VISIBILITIES AT  
TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER WEATHER ADVISORY FOR SNOW MEANS PERIODS OF SNOW WILL  
CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED  
ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING.  
THE LATEST ROAD CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN  
BE OBTAINED BY CALLING 5 1 1.  
 

 
 
IDZ008-191800-  
/O.CON.KMSO.WW.Y.0008.180118T2100Z-180119T1800Z/  
LOWER HELLS CANYON/SALMON RIVER REGION-  
952 AM PST THU JAN 18 2018  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 PM THIS  
AFTERNOON TO 10 AM PST FRIDAY ABOVE 3000 FEET...  
 
* WHAT...SNOW EXPECTED. PLAN ON SLIPPERY ROAD CONDITIONS. TOTAL  
SNOW ACCUMULATIONS OF 2 TO 4 INCHES ARE EXPECTED.  
 
* WHERE...WHITEBIRD HILL ON HIGHWAY 95.  
 
* WHEN...COLD FRONT WILL BRING A PERIOD OF INTENSE SNOW WHICH  
WILL CAUSE LOW VISIBILITY WITH CONDITIONS BECOMING VERY SLICK  
DUE TO FALLING TEMPERATURES AND PREVIOUS WET SURFACES BETWEEN  
3 AND 5 PM.  
 
* ADDITIONAL DETAILS...BE PREPARED FOR REDUCED VISIBILITIES AT  
TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER WEATHER ADVISORY FOR SNOW MEANS PERIODS OF SNOW WILL  
CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED  
ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE DRIVING.  
THE LATEST ROAD CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN  
BE OBTAINED BY CALLING 5 1 1.  
 

 
 
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