831
WWUS45 KBYZ 121550
WSWBYZ
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE BILLINGS MT
850 AM MST FRI DEC 12 2025
MTZ029-042-063-173-228-130600-
/O.CON.KBYZ.WS.W.0019.000000T0000Z-251213T0600Z/
MUSSELSHELL-GOLDEN VALLEY-JUDITH GAP-NORTHEASTERN YELLOWSTONE-
SOUTHERN WHEATLAND-
INCLUDING THE LOCATIONS OF RYEGATE, POMPEYS PILLAR, MUSSELSHELL,
ROUNDUP, MELSTONE, SHAWMUT, HARLOWTON, JUDITH GAP, TWODOT, CUSTER,
AND LAVINA
850 AM MST FRI DEC 12 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...
* WHAT...HEAVY SNOW OCCURRING. ADDITIONAL SNOW ACCUMULATIONS BETWEEN
2 AND 4 INCHES. WINDS GUSTING AS HIGH AS 35 MPH.
* WHERE...GOLDEN VALLEY, JUDITH GAP, MUSSELSHELL, SOUTHERN WHEATLAND,
AND NORTHEASTERN YELLOWSTONE.
* WHEN...UNTIL 11 PM MST THIS EVENING.
* IMPACTS...TRAVEL WILL BE VERY DIFFICULT WITH SLICK AND SNOW COVERED
ROADS, AND AREAS OF POOR VISIBILITY. BLOWING AND DRIFTING SNOW WILL
IMPACT TRAVEL ON US-191 THROUGH JUDITH GAP THIS EVENING INTO
TONIGHT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN YOUR
VEHICLE IN CASE OF AN EMERGENCY. FOR THE LATEST ROAD CONDITIONS, CALL
5 1 1.
MTZ030>032-131500-
/O.CON.KBYZ.WS.W.0019.000000T0000Z-251213T1500Z/
TREASURE-NORTHERN ROSEBUD-CUSTER-
INCLUDING THE LOCATIONS OF MILES CITY, HYSHAM, COLSTRIP, BIGHORN,
ANGELA, ISMAY, FORSYTH, INGOMAR, AND VOLBORG
850 AM MST FRI DEC 12 2025
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 AM MST SATURDAY
* WHAT...HEAVY SNOW OCCURRING. ADDITIONAL SNOW ACCUMULATIONS BETWEEN
4 AND 6 INCHES.
* WHERE...TREASURE, CUSTER, AND NORTHERN ROSEBUD.
* WHEN...UNTIL 8 AM MST SATURDAY.
* IMPACTS...TRAVEL CONDITIONS WILL REMAIN DIFFICULT INTO SATURDAY DUE
TO HEAVY ACCUMULATING SNOW.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN YOUR
VEHICLE IN CASE OF AN EMERGENCY. FOR THE LATEST ROAD CONDITIONS, CALL
5 1 1.
MTZ034-057-058-138-141-172-235-130300-
/O.CON.KBYZ.WS.W.0019.000000T0000Z-251213T0300Z/
NORTHERN STILLWATER-NORTHERN BIG HORN-SOUTHERN ROSEBUD-SOUTHERN
BIG HORN-NORTHERN SWEET GRASS-MELVILLE FOOTHILLS-SOUTHWESTERN
YELLOWSTONE-
INCLUDING THE LOCATIONS OF HUNTLEY, WYOLA, PARK CITY, ASHLAND, PRYOR,
COLUMBUS, BROADVIEW, LAME DEER, BILLINGS, LAUREL, BIRNEY, REED POINT,
ABSAROKEE, BUSBY, LODGE GRASS, CROW AGENCY, BIG TIMBER, MELVILLE,
HARDIN, AND RAPELJE
850 AM MST FRI DEC 12 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...
* WHAT...HEAVY SNOW OCCURRING. ADDITIONAL SNOW ACCUMULATIONS UP TO OF
2 TO 4 INCHES.
* WHERE...PORTIONS OF SOUTH CENTRAL AND SOUTHEAST MONTANA.
* WHEN...UNTIL 8 PM MST THIS EVENING.
* IMPACTS...TRAVEL WILL BE VERY DIFFICULT WITH SLICK AND SNOW COVERED
ROADS, AND AREAS OF POOR VISIBILITY. THE HAZARDOUS CONDITIONS WILL
IMPACT THE FRIDAY MORNING AND EVENING COMMUTES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN YOUR
VEHICLE IN CASE OF AN EMERGENCY. FOR THE LATEST ROAD CONDITIONS, CALL
5 1 1.
MTZ068-130300-
/O.CON.KBYZ.WS.W.0019.000000T0000Z-251213T0300Z/
CRAZY MOUNTAINS-
850 AM MST FRI DEC 12 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...
* WHAT...HEAVY SNOW OCCURRING. ADDITIONAL SNOW ACCUMULATIONS BETWEEN
4 AND 6 INCHES. WINDS GUSTING AS HIGH AS 45 MPH.
* WHERE...CRAZY MOUNTAINS.
* WHEN...UNTIL 8 PM MST THIS EVENING.
* IMPACTS...RECREATION IN THE HIGH COUNTRY WILL BE IMPACTED BY HEAVY
ACCUMULATING SNOW AND BLOWING SNOW.
* ADDITIONAL DETAILS...AVALANCHE DANGER MAY INCREASE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE PREPARED FOR WINTRY CONDITIONS IF YOU HAVE PLANS IN THE
BACKCOUNTRY.
MTZ040-065-121900-
/O.EXT.KBYZ.WW.Y.0041.000000T0000Z-251212T1900Z/
NORTHERN PARK-LIVINGSTON AREA-
INCLUDING THE LOCATIONS OF LIVINGSTON, CLYDE PARK, WILSALL, AND
SPRINGDALE
850 AM MST FRI DEC 12 2025
..WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL NOON MST TODAY
* WHAT...MIXED PRECIPITATION OCCURRING INCLUDING FREEZING RAIN.
ADDITIONAL SNOW ACCUMULATIONS LESS THAN AN INCH AND ICE
ACCUMULATIONS FROM A LIGHT GLAZE TO 0.05 INCHES.
* WHERE...LIVINGSTON AREA AND NORTHERN PARK.
* WHEN...UNTIL NOON MST TODAY.
* IMPACTS...PLAN ON SLICK ROAD CONDITIONS. THE HAZARDOUS CONDITIONS
WILL IMPACT THE FRIDAY MORNING COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. FOR THE LATEST ROAD
CONDITIONS, CALL 5 1 1.
MTZ056-066-139-121900-
/O.EXT.KBYZ.WW.Y.0041.000000T0000Z-251212T1900Z/
RED LODGE FOOTHILLS-BEARTOOTH FOOTHILLS-SOUTHEASTERN CARBON-
INCLUDING THE LOCATIONS OF ROSCOE, MCLEOD, ROBERTS, FISHTAIL, RED
LODGE, NYE, BELFRY, BRIDGER, AND WARREN
850 AM MST FRI DEC 12 2025
..WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL NOON MST TODAY
* WHAT...ADDITIONAL SNOW ACCUMULATIONS LESS THAN ONE INCH.
* WHERE...BEARTOOTH FOOTHILLS, RED LODGE FOOTHILLS, AND SOUTHEASTERN
CARBON.
* WHEN...UNTIL NOON MST TODAY.
* IMPACTS...ROADS, AND ESPECIALLY BRIDGES AND OVERPASSES, WILL LIKELY
BECOME SLICK AND HAZARDOUS. THE HAZARDOUS CONDITIONS WILL IMPACT
THE FRIDAY MORNING COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. FOR THE LATEST ROAD
CONDITIONS, CALL 5 1 1.
MTZ033-036-037-131500-
/O.CON.KBYZ.WW.Y.0041.000000T0000Z-251213T1500Z/
FALLON-POWDER RIVER-CARTER-
INCLUDING THE LOCATIONS OF ALZADA, HAMMOND, WEBSTER, BROADUS,
SONNETTE, BIDDLE, BAKER, EKALAKA, BELLTOWER, POWDERVILLE, AND PLEVNA
850 AM MST FRI DEC 12 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST
SATURDAY...
* WHAT...SNOW OCCURRING. ADDITIONAL SNOW ACCUMULATIONS BETWEEN 1 AND
5 INCHES.
* WHERE...CARTER, FALLON, AND POWDER RIVER.
* WHEN...UNTIL 8 AM MST SATURDAY.
* IMPACTS...TRAVEL MAY BECOME TREACHEROUS DURING THIS TIME. TRAVEL
CONDITIONS WILL REMAIN DIFFICULT INTO SATURDAY DUE TO ACCUMULATING
SNOW.
* ADDITIONAL DETAILS...LOWER SNOWFALL TOTALS WILL OCCUR IN POWDER
RIVER AND CARTER COUNTIES WITH HIGHER AMOUNTS IN FALLON COUNTY.
SNOWFALL IN PARTS OF FALLON COUNTY MAY EXCEED 6 INCHES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. FOR THE LATEST ROAD
CONDITIONS, CALL 5 1 1.
MTZ169-170-WYZ199-121900-
/O.CON.KBYZ.WW.Y.0041.000000T0000Z-251212T1900Z/
BIGHORN CANYON-NORTHERN CARBON-SHERIDAN FOOTHILLS-
INCLUDING THE LOCATIONS OF BIG HORN, CLEARMONT, RANCHESTER, SHERIDAN,
JOLIET, FORT SMITH, DAYTON, AND FROMBERG
850 AM MST FRI DEC 12 2025
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY
* WHAT...SNOW OCCURRING. ADDITIONAL SNOW ACCUMULATIONS UP TO 2
INCHES.
* WHERE...IN MONTANA, BIGHORN CANYON AND NORTHERN CARBON. IN WYOMING,
SHERIDAN FOOTHILLS.
* WHEN...UNTIL NOON MST TODAY.
* IMPACTS...PLAN ON SLICK ROAD CONDITIONS. THE HAZARDOUS CONDITIONS
WILL IMPACT THE FRIDAY MORNING COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. FOR THE LATEST ROAD
CONDITIONS, CALL 5 1 1.
MTZ171-WYZ198-121900-
/O.CON.KBYZ.WW.Y.0041.000000T0000Z-251212T1900Z/
PRYOR/NORTHERN BIGHORN MOUNTAINS-NORTHEAST BIGHORN MOUNTAINS-
INCLUDING THE LOCATIONS OF STORY AND BURGESS JCT
850 AM MST FRI DEC 12 2025
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY
* WHAT...SNOW OCCURRING. ADDITIONAL SNOW ACCUMULATIONS UP TO 2
INCHES.
* WHERE...IN MONTANA, PRYOR/NORTHERN BIGHORN MOUNTAINS. IN WYOMING,
NORTHEAST BIGHORN MOUNTAINS.
* WHEN...UNTIL NOON MST TODAY.
* IMPACTS...PLAN ON SLICK ROAD CONDITIONS. THE HAZARDOUS CONDITIONS
WILL IMPACT THE FRIDAY MORNING COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. FOR THE LATEST ROAD
CONDITIONS, CALL 5 1 1.
ADDITIONAL GRAPHICS FOR THIS HAZARD CAN BE FOUND AT
HTTP://WWW.WEATHER.GOV/BILLINGS
STETZER
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