931
WWUS45 KMSO 232235
WSWMSO
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
435 PM MDT THU APR 23 2026
MTZ004-241700-
/O.EXB.KMSO.WW.Y.0021.260424T0300Z-260424T1700Z/
LOWER CLARK FORK REGION-
435 PM MDT THU APR 23 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 11 AM
MDT FRIDAY...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MINOR TO MODERATE
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS UP TO THREE
INCHES AND 3 TO 7 INCHES OVER EVARO HILL.
* WHERE...EVARO HILL, I-90 LOOKOUT PASS TO HAUGAN, HIGHWAY 200
THOMPSON FALLS TO PLAINS, AND HIGHWAY 200 TROUT CREEK TO HERON.
* WHEN...FROM 9 PM THIS EVENING TO 11 AM MDT FRIDAY.
* IMPACTS...FOR MINOR WINTER WEATHER IMPACTS, EXPECT A FEW
INCONVENIENCES TO NORMAL ACTIVITIES. USE CAUTION WHILE DRIVING.
WINTER TRAVELING CONDITIONS. THE HEAVY NATURE OF THE SNOW COULD
LEAD TO LOCALIZED TREE DAMAGE AND SCATTERED POWER OUTAGES. THESE
CONDITIONS COULD IMPACT THE FRIDAY MORNING COMMUTE.
* ADDITIONAL DETAILS...ROADS WILL START OUT WET THIS EVENING, BUT AS
HEAVIER SNOW BANDS MOVE IN AND TEMPERATURES DROP BELOW FREEZING
TONIGHT, STANDING WATER AND SLUSH MAY QUICKLY FREEZE, WITH ICY
CONDITIONS POSSIBLE THROUGH THE FRIDAY MORNING COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. THE LATEST ROAD
CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY
CALLING 5 1 1.
MTZ005-241700-
/O.EXB.KMSO.WW.Y.0021.260424T0300Z-260424T1700Z/
MISSOULA/BITTERROOT VALLEYS-
435 PM MDT THU APR 23 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 11 AM
MDT FRIDAY...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MINOR TO MODERATE
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS UP TO THREE
INCHES, WITH LOCALIZED HIGHER AMOUNTS NEAR 6 INCHES.
* WHERE...BITTERROOT VALLEY AND MISSOULA.
* WHEN...FROM 9 PM THIS EVENING TO 11 AM MDT FRIDAY.
* IMPACTS...FOR MINOR WINTER WEATHER IMPACTS, EXPECT A FEW
INCONVENIENCES TO NORMAL ACTIVITIES. USE CAUTION WHILE DRIVING.
FOR MODERATE WINTER WEATHER IMPACTS, EXPECT DISRUPTIONS TO NORMAL
ACTIVITIES. HAZARDOUS TRAVELING CONDITIONS. THE HEAVY NATURE OF
THE SNOW COULD LEAD TO LOCALIZED TREE DAMAGE AND SCATTERED POWER
OUTAGES. THESE CONDITIONS COULD IMPACT THE FRIDAY MORNING COMMUTE.
* ADDITIONAL DETAILS...ROADS WILL START OUT WET THIS EVENING, BUT AS
HEAVIER SNOW BANDS MOVE IN AND TEMPERATURES DROP BELOW FREEZING
TONIGHT, STANDING WATER AND SLUSH MAY QUICKLY FREEZE, WITH ICY
CONDITIONS POSSIBLE THROUGH THE FRIDAY MORNING COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. THE LATEST ROAD
CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY
CALLING 5 1 1.
IDZ006-241800-
/O.CON.KMSO.WW.Y.0021.000000T0000Z-260424T1800Z/
SOUTHERN CLEARWATER MOUNTAINS-
335 PM PDT THU APR 23 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM PDT FRIDAY
ABOVE 4000 FEET...
* WHAT...SNOW ABOVE 4000 FEET. THERE IS A LIKELIHOOD OF DEVELOPING
OR ONGOING MINOR TO MODERATE WINTER WEATHER IMPACTS. ADDITIONAL
SNOW ACCUMULATIONS BETWEEN 2 AND 4 INCHES. WINDS GUSTING AS HIGH
AS 35 MPH.
* WHERE...DIXIE AND ELK CITY.
* WHEN...UNTIL 11 AM PDT FRIDAY.
* IMPACTS...FOR MINOR WINTER WEATHER IMPACTS, EXPECT A FEW
INCONVENIENCES TO NORMAL ACTIVITIES. USE CAUTION WHILE DRIVING.
FOR MODERATE WINTER WEATHER IMPACTS, EXPECT DISRUPTIONS TO NORMAL
ACTIVITIES. HAZARDOUS TRAVELING CONDITIONS. USE EXTRA CAUTION
WHILE DRIVING. CLOSURES AND DISRUPTIONS TO INFRASTRUCTURE MAY
OCCUR. THE HAZARDOUS CONDITIONS COULD IMPACT THE THURSDAY EVENING
AND FRIDAY MORNING COMMUTES, ESPECIALLY OVER HIGHER PASSES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. THE LATEST ROAD
CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY
CALLING 5 1 1.
IDZ009-010-241800-
/O.CON.KMSO.WW.Y.0021.000000T0000Z-260424T1800Z/
WESTERN LEMHI COUNTY-EASTERN LEMHI COUNTY-
435 PM MDT THU APR 23 2026
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...SNOW. THERE IS A CHANCE OF DEVELOPING OR ONGOING MINOR
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS OF 1 TO 3 INCHES
IN THE VALLEYS, 5 TO 10 INCHES AT PASS LEVEL, AND OVER 12 INCHES
IN THE HIGH TERRAIN. WINDS GUSTING AS HIGH AS 35 MPH.
* WHERE...SALMON, HIGHWAY 28 TENDOY TO LONE PINE, WILLIAMS CREEK
SUMMIT, HIGHWAY 93 LOST TRAIL PASS TO GIBBONSVILLE, LEMHI PASS,
SHOUP, AND BANNOCK PASS.
* WHEN...UNTIL NOON MDT FRIDAY.
* IMPACTS...FOR MINOR WINTER WEATHER IMPACTS, EXPECT A FEW
INCONVENIENCES TO NORMAL ACTIVITIES. USE CAUTION WHILE DRIVING.
WINTER TRAVELING CONDITIONS. THE HAZARDOUS CONDITIONS COULD IMPACT
THE THURSDAY EVENING AND FRIDAY MORNING COMMUTES, ESPECIALLY OVER
HIGHER PASSES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. THE LATEST ROAD
CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY
CALLING 5 1 1.
MTZ002-240000-
/O.CON.KMSO.WW.Y.0021.000000T0000Z-260424T0000Z/
WEST GLACIER REGION-
435 PM MDT THU APR 23 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...SNOW. THERE IS A CHANCE OF DEVELOPING OR ONGOING MINOR
WINTER WEATHER IMPACTS. ADDITIONAL SNOW ACCUMULATIONS UP TO TWO
INCH.
* WHERE...BAD ROCK CANYON, MARIAS PASS, HIGHWAY 83 BIGFORK TO SWAN
LAKE, POLEBRIDGE, GLACIER NATIONAL PARK, AND ESSEX.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* IMPACTS...FOR MINOR WINTER WEATHER IMPACTS, EXPECT A FEW
INCONVENIENCES TO NORMAL ACTIVITIES. USE CAUTION WHILE DRIVING.
THE HAZARDOUS CONDITIONS COULD IMPACT THE THURSDAY EVENING
COMMUTE, ESPECIALLY OVER HIGHER PASSES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. THE LATEST ROAD
CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY
CALLING 5 1 1.
MTZ006-241800-
/O.CON.KMSO.WW.Y.0021.000000T0000Z-260424T1800Z/
BITTERROOT/SAPPHIRE MOUNTAINS-
435 PM MDT THU APR 23 2026
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...SNOW. THERE IS A LIKELIHOOD OF DEVELOPING OR ONGOING MINOR
TO MODERATE WINTER WEATHER IMPACTS. ADDITIONAL SNOW ACCUMULATIONS
BETWEEN 3 AND 8 INCHES.
* WHERE...LOLO PASS AND HIGHWAY 93 SULA TO LOST TRAIL PASS.
* WHEN...UNTIL NOON MDT FRIDAY.
* IMPACTS...FOR MODERATE WINTER WEATHER IMPACTS, EXPECT DISRUPTIONS
TO NORMAL ACTIVITIES. HAZARDOUS TRAVELING CONDITIONS. USE EXTRA
CAUTION WHILE DRIVING. CLOSURES AND DISRUPTIONS TO INFRASTRUCTURE
MAY OCCUR. THE HAZARDOUS CONDITIONS COULD IMPACT THE THURSDAY
EVENING AND FRIDAY MORNING COMMUTES, ESPECIALLY OVER HIGHER PASSES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. THE LATEST ROAD
CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY
CALLING 5 1 1.
MTZ007-241800-
/O.CON.KMSO.WW.Y.0021.000000T0000Z-260424T1800Z/
BUTTE/BLACKFOOT REGION-
435 PM MDT THU APR 23 2026
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...SNOW. THERE IS A LIKELIHOOD OF DEVELOPING OR ONGOING MINOR
TO MODERATE WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS OF 3
TO 6 INCHES IN THE VALLEYS, 5 TO 10 INCHES AT PASS LEVEL, AND OVER
12 INCHES IN THE HIGH TERRAIN. WINDS GUSTING AS HIGH AS 35 MPH.
* WHERE...HOMESTAKE PASS, GEORGETOWN LAKE, MACDONALD PASS, HIGHWAY
12 GARRISON TO ELLISTON, AND BUTTE.
* WHEN...UNTIL NOON MDT FRIDAY.
* IMPACTS...FOR MINOR WINTER WEATHER IMPACTS, EXPECT A FEW
INCONVENIENCES TO NORMAL ACTIVITIES. USE CAUTION WHILE DRIVING.
FOR MODERATE WINTER WEATHER IMPACTS, EXPECT DISRUPTIONS TO NORMAL
ACTIVITIES. HAZARDOUS TRAVELING CONDITIONS. USE EXTRA CAUTION
WHILE DRIVING. CLOSURES AND DISRUPTIONS TO INFRASTRUCTURE MAY
OCCUR. THE HAZARDOUS CONDITIONS COULD IMPACT THE THURSDAY EVENING
AND FRIDAY MORNING COMMUTES, ESPECIALLY OVER HIGHER PASSES.
* ADDITIONAL DETAILS...ROADS WILL START OUT WET THIS EVENING, BUT
STANDING WATER AND SLUSH MAY QUICKLY FREEZE TONIGHT, WITH ICY
CONDITIONS POSSIBLE THROUGH THE FRIDAY MORNING COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. THE LATEST ROAD
CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY
CALLING 5 1 1.
MTZ043-241800-
/O.CON.KMSO.WW.Y.0021.000000T0000Z-260424T1800Z/
POTOMAC/SEELEY LAKE REGION-
435 PM MDT THU APR 23 2026
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...SNOW. THERE IS A LIKELIHOOD OF DEVELOPING OR ONGOING MINOR
TO MODERATE WINTER WEATHER IMPACTS. ADDITIONAL SNOW ACCUMULATIONS
BETWEEN 2 AND 6 INCHES.
* WHERE...HIGHWAY 200 BONNER TO GREENOUGH, I-90 EAST MISSOULA TO
BEARMOUTH, AND HIGHWAY 83 SEELEY LAKE TO CONDON.
* WHEN...UNTIL NOON MDT FRIDAY.
* IMPACTS...FOR MINOR WINTER WEATHER IMPACTS, EXPECT A FEW
INCONVENIENCES TO NORMAL ACTIVITIES. USE CAUTION WHILE DRIVING.
WINTER TRAVELING CONDITIONS. THE HAZARDOUS CONDITIONS COULD IMPACT
THE THURSDAY EVENING AND FRIDAY MORNING COMMUTES, ESPECIALLY OVER
HIGHER PASSES.
* ADDITIONAL DETAILS...ROADS WILL START OUT WET THIS EVENING, BUT AS
HEAVIER SNOW BANDS MOVE IN AND TEMPERATURES DROP BELOW FREEZING
TONIGHT, STANDING WATER AND SLUSH MAY QUICKLY FREEZE, WITH ICY
CONDITIONS POSSIBLE THROUGH THE FRIDAY MORNING COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. THE LATEST ROAD
CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY
CALLING 5 1 1.
JK
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