918
WWUS45 KBOU 051755
WSWBOU
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER CO
1155 AM MDT TUE MAY 5 2026
COZ033-035-061200-
/O.CON.KBOU.WS.W.0005.000000T0000Z-260506T2100Z/
SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST
GRAND/NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-LARIMER AND
BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-
INCLUDING THE CITIES OF ESTES PARK, NEDERLAND, LARAMIE AND MEDICINE
BOW MOUNTAINS, WILLOW CREEK PASS, CAMERON PASS, RED FEATHER LAKES,
GLENDEVEY, RABBIT EARS RANGE, AND ROCKY MOUNTAIN NATIONAL PARK
1155 AM MDT TUE MAY 5 2026
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT WEDNESDAY
* WHAT...HEAVY SNOW OCCURRING. TOTAL SNOW ACCUMULATIONS BETWEEN 14
AND 24 INCHES. ISOLATED TOTALS UP TO 30 INCHES POSSIBLE ACROSS THE
HIGHER MOUNTAINS IN BOULDER AND LARIMER COUNTIES.
* WHERE...ROCKY MOUNTAIN NATIONAL PARK, THE MEDICINE BOW RANGE, AND
THE NORTHERN FRONT RANGE FOOTHILLS, INCLUDING RED FEATHER LAKES,
ESTES PARK, AND NEDERLAND.
* WHEN...UNTIL 3 PM MDT WEDNESDAY.
* IMPACTS...HEAVY SNOW ACCUMULATING ON TREES MAY RESULT IN BROKEN
TREE LIMBS, DOWNED POWERLINES, AND SCATTERED POWER OUTAGES. TRAVEL
COULD BE VERY DIFFICULT DUE TO THE DEPTH OF HEAVY, WET SNOW.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN YOUR
VEHICLE IN CASE OF AN EMERGENCY. THE LATEST ROAD CONDITIONS FOR
COLORADO CAN BE OBTAINED BY CALLING 5 1 1 OR BY GOING TO
WWW.COTRIP.ORG.
PREPARE FOR POSSIBLE POWER OUTAGES BY CHARING CELL PHONES AND
PORTABLE CHARGERS AHEAD OF TIME.
COZ034-036-061200-
/O.CON.KBOU.WS.W.0005.260505T1800Z-260506T2100Z/
SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST
BOULDER/GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES
ABOVE 9000 FEET-JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE
6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW
9000 FEET-
INCLUDING THE CITIES OF INDIAN PEAKS, IDAHO SPRINGS, BERTHOUD PASS,
WESTCREEK, WILLIAMS FORK MOUNTAINS, EAST SLOPES MOSQUITO RANGE,
KENOSHA MOUNTAINS, WINTER PARK, GEORGETOWN, MOUNT BLUE SKY,
EISENHOWER TUNNEL, BRECKENRIDGE, BAILEY, CENTRAL CITY, EVERGREEN, AND
EAST SLOPES SOUTHERN GORE RANGE
1155 AM MDT TUE MAY 5 2026
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT WEDNESDAY
* WHAT...HEAVY SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 6 AND
16 INCHES, WITH THE HEAVIEST SNOWFALL GENERALLY ALONG AND NORTH OF
I-70.
* WHERE...THE MOUNTAINS OF SUMMIT COUNTY, THE MOSQUITO RANGE, THE
INDIAN PEAKS WILDERNESS, AND THE SOUTHERN FRONT RANGE FOOTHILLS.
* WHEN...UNTIL 3 PM MDT WEDNESDAY.
* IMPACTS...HEAVY SNOW WILL ACCUMULATE ON TREE BRANCHES AND
POWERLINES, POSSIBLY CAUSING THEM TO BREAK AND LEAD TO POWER
OUTAGES. TRAVEL COULD BE VERY DIFFICULT. THE HAZARDOUS CONDITIONS
WILL IMPACT THE TUESDAY EVENING AND WEDNESDAY MORNING COMMUTES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN YOUR
VEHICLE IN CASE OF AN EMERGENCY. THE LATEST ROAD CONDITIONS FOR
COLORADO CAN BE OBTAINED BY CALLING 5 1 1 OR BY GOING TO
WWW.COTRIP.ORG.
PREPARE FOR POSSIBLE POWER OUTAGES BY CHARING CELL PHONES AND
PORTABLE CHARGERS AHEAD OF TIME.
COZ038>041-061200-
/O.CON.KBOU.WS.W.0005.260506T0200Z-260506T2100Z/
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-BOULDER AND
JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY-NORTH
DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE
COUNTIES/EAST BROOMFIELD COUNTY-ELBERT/CENTRAL AND EAST DOUGLAS
COUNTIES ABOVE 6000 FEET-
INCLUDING THE CITIES OF BRIGHTON, KIOWA, HIGHLANDS RANCH, BOULDER,
GOLDEN, LONGMONT, FONDIS, LARKSPUR, LITTLETON, HEREFORD, PARKER,
ARVADA, FORT COLLINS, CASTLE ROCK, AURORA, CITY OF DENVER, LAKEWOOD,
ELBERT, NUNN, LOVELAND, AND DENVER INTERNATIONAL AIRPORT
1155 AM MDT TUE MAY 5 2026
...WINTER STORM WARNING REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 3
PM MDT WEDNESDAY...
* WHAT...HEAVY SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 5 AND
8 INCHES WITH LOCALLY UP TO 12 INCHES NEXT TO THE FOOTHILLS.
* WHERE...FORT COLLINS, BOULDER, DENVER METRO AREA, AND CASTLE ROCK.
* WHEN...FROM 8 PM THIS EVENING TO 3 PM MDT WEDNESDAY.
* IMPACTS...HEAVY SNOW ACCUMULATING ON TREES MAY RESULT IN BROKEN
TREE LIMBS, DOWNED POWERLINES, AND SCATTERED POWER OUTAGES. DESPITE
LESSER ACCUMULATIONS ON ROADWAYS, SLICK AND HAZARDOUS CONDITIONS
ARE STILL POSSIBLE FOR THE WEDNESDAY MORNING COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN YOUR
VEHICLE IN CASE OF AN EMERGENCY. THE LATEST ROAD CONDITIONS FOR
COLORADO CAN BE OBTAINED BY CALLING 5 1 1 OR BY GOING TO
WWW.COTRIP.ORG.
PREPARE FOR POSSIBLE POWER OUTAGES BY CHARING CELL PHONES AND
PORTABLE CHARGERS AHEAD OF TIME.
COZ031-061200-
/O.CON.KBOU.WW.Y.0017.260505T1800Z-260506T1800Z/
WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-
INCLUDING THE CITIES OF MT ZIRKEL
1155 AM MDT TUE MAY 5 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT
WEDNESDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 6 AND 14
INCHES. WINDS GUSTING AS HIGH AS 35 MPH.
* WHERE...RABBIT EARS PASS.
* WHEN...UNTIL NOON MDT WEDNESDAY.
* IMPACTS...TRAVEL COULD BE DIFFICULT AT TIMES, ESPECIALLY TONIGHT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. THE LATEST ROAD CONDITIONS
FOR COLORADO CAN BE OBTAINED BY CALLING 5 1 1 OR BY GOING TO
WWW.COTRIP.ORG.
COZ030-032-037-043-045-046-061200-
/O.CON.KBOU.WW.Y.0017.260506T0200Z-260506T2100Z/
JACKSON COUNTY BELOW 9000 FEET-GRAND AND SUMMIT COUNTIES BELOW
9000 FEET-CENTRAL AND SOUTHEAST PARK COUNTY-CENTRAL AND SOUTH
WELD COUNTY-CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-NORTH
AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY-
INCLUDING THE CITIES OF MATHESON, HARTSEL, AGATE, NORTH PARK, GRANBY,
GREELEY, FORT LUPTON, HOT SULPHUR SPRINGS, BYERS, FRASER, GOULD,
SOUTH PARK, KREMMLING, RAND, LEADER, DILLON, EATON, ROGGEN, DEER
TRAIL, SPICER, HUGO, LIMON, BENNETT, LAKE GEORGE, FAIRPLAY, GRAND
LAKE, AND WALDEN
1155 AM MDT TUE MAY 5 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING
TO 3 PM MDT WEDNESDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 3 AND 6
INCHES.
* WHERE...THE HIGH MOUNTAIN VALLEYS, AND PORTIONS OF THE CENTRAL
PLAINS FROM WELD COUNTY SOUTH INTO LINCOLN COUNTY.
* WHEN...FROM 8 PM THIS EVENING TO 3 PM MDT WEDNESDAY.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS, WHICH MAY IMPACT THE
WEDNESDAY MORNING COMMUTE. THE HEAVY AND WET NATURE OF THE SNOW MAY
LEAD TO DAMAGE TO TREE LIMBS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. THE LATEST ROAD CONDITIONS
FOR COLORADO CAN BE OBTAINED BY CALLING 5 1 1 OR BY GOING TO
WWW.COTRIP.ORG.
COZ042-044-049-061200-
/O.CON.KBOU.WW.Y.0017.260506T0200Z-260506T2100Z/
NORTHEAST WELD COUNTY-MORGAN COUNTY-WASHINGTON COUNTY-
INCLUDING THE CITIES OF GROVER, COPE, BRUSH, WIGGINS, BRIGGSDALE,
AKRON, GOODRICH, PAWNEE BUTTES, STONEHAM, RAYMER, FORT MORGAN, LAST
CHANCE, AND OTIS
1155 AM MDT TUE MAY 5 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING
TO 3 PM MDT WEDNESDAY...
* WHAT...WET SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 2 AND 6
INCHES.
* WHERE...BRIGGSDALE, FORT MORGAN, AND AKRON.
* WHEN...FROM 8 PM THIS EVENING TO 3 PM MDT WEDNESDAY.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS, MAINLY LATE TUESDAY
NIGHT THROUGH WEDNESDAY MORNING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. THE LATEST ROAD CONDITIONS
FOR COLORADO CAN BE OBTAINED BY CALLING 5 1 1 OR BY GOING TO
WWW.COTRIP.ORG.
FOR MORE INFORMATION FROM THE NATIONAL WEATHER SERVICE, VISIT
HTTPS://WEATHER.GOV/BOU
20
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