216
WWUS45 KBOU 040651
WSWBOU
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER CO
1251 AM MDT MON MAY 4 2026
COZ033-035-042100-
/O.UPG.KBOU.WS.A.0003.260505T0600Z-260506T1800Z/
/O.NEW.KBOU.WS.W.0005.260505T0600Z-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 WILLOW CREEK PASS, GLENDEVEY, RED FEATHER
LAKES, ROCKY MOUNTAIN NATIONAL PARK, RABBIT EARS RANGE, ESTES PARK,
LARAMIE AND MEDICINE BOW MOUNTAINS, NEDERLAND, AND CAMERON PASS
1251 AM MDT MON MAY 4 2026
...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 3 PM MDT
WEDNESDAY...
* WHAT...HEAVY SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 10 AND
24 INCHES, HEAVIEST ABOVE 8,000 FEET.
* WHERE...ROCKY MOUNTAIN NATIONAL PARK, THE MEDICINE BOW RANGE, AND
THE NORTHERN FRONT RANGE FOOTHILLS, INCLUDING RED FEATHER LAKES,
ESTES PARK, AND NEDERLAND.
* WHEN...FROM MIDNIGHT TONIGHT TO 3 PM MDT WEDNESDAY. HEAVIEST
TUESDAY MORNING THROUGH TUESDAY NIGHT.
* 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 TO IMPOSSIBLE AT TIMES,
ESPECIALLY LATE TUESDAY.
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.
COZ030-032-037-043-045-046-042100-
/O.NEW.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 RAND, DEER TRAIL, HARTSEL, LAKE GEORGE, HOT
SULPHUR SPRINGS, GREELEY, FRASER, LEADER, HUGO, FAIRPLAY, GOULD,
DILLON, BENNETT, AGATE, GRAND LAKE, FORT LUPTON, KREMMLING, SPICER,
EATON, WALDEN, SOUTH PARK, ROGGEN, NORTH PARK, BYERS, LIMON, GRANBY,
AND MATHESON
1251 AM MDT MON MAY 4 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM TUESDAY TO 3 PM MDT
WEDNESDAY...
* WHAT...SNOW LIKELY. TOTAL SNOW ACCUMULATIONS BETWEEN 1 AND 6 INCHES
POSSIBLE.
* WHERE...THE HIGH MOUNTAIN VALLEYS, AND PORTIONS OF THE CENTRAL
PLAINS FROM WELD COUNTY SOUTH INTO LINCOLN COUNTY.
* WHEN...FROM 8 PM TUESDAY 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.
COZ038>041-042100-
/O.EXB.KBOU.WS.A.0003.260506T0200Z-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 FONDIS, BRIGHTON, HEREFORD, HIGHLANDS RANCH,
DENVER INTERNATIONAL AIRPORT, FORT COLLINS, LARKSPUR, LAKEWOOD,
CASTLE ROCK, LOVELAND, BOULDER, NUNN, LITTLETON, GOLDEN, ELBERT,
AURORA, ARVADA, CITY OF DENVER, LONGMONT, PARKER, AND KIOWA
1251 AM MDT MON MAY 4 2026
...WINTER STORM WATCH IN EFFECT FROM TUESDAY EVENING THROUGH
WEDNESDAY AFTERNOON...
* WHAT...HEAVY SNOW POSSIBLE. TOTAL SNOW ACCUMULATIONS BETWEEN 3 AND
9 INCHES EXPECTED, HEAVIEST ON COLDER SURFACES AND WEST OF I-25.
* WHERE...FORT COLLINS, BOULDER AND THE WESTERN SUBURBS OF DENVER,
DENVER, AND CASTLE ROCK.
* WHEN...FROM TUESDAY EVENING THROUGH WEDNESDAY AFTERNOON. HEAVIEST
TUESDAY NIGHT INTO WEDNESDAY MORNING.
* IMPACTS...HEAVY WET SNOW WILL ACCUMULATE ON TREE BRANCHES AND
POWERLINES, POSSIBLY CAUSING THEM TO BREAK AND LEAD TO POWER
OUTAGES. DESPITE LESSER ACCUMULATIONS ON ROADWAYS, SLICK AND
HAZARDOUS CONDITIONS ARE STILL POSSIBLE FOR THE WEDNESDAY MORNING
COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MONITOR THE LATEST FORECASTS FOR UPDATES ON THIS APPROACHING STORM.
COZ034-036-042100-
/O.EXT.KBOU.WS.A.0003.260505T1200Z-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 BERTHOUD PASS, EAST SLOPES MOSQUITO RANGE,
EVERGREEN, WESTCREEK, KENOSHA MOUNTAINS, WILLIAMS FORK MOUNTAINS,
INDIAN PEAKS, EAST SLOPES SOUTHERN GORE RANGE, IDAHO SPRINGS, WINTER
PARK, BRECKENRIDGE, CENTRAL CITY, GEORGETOWN, BAILEY, EISENHOWER
TUNNEL, AND MOUNT BLUE SKY
1251 AM MDT MON MAY 4 2026
...WINTER STORM WATCH NOW IN EFFECT FROM TUESDAY MORNING THROUGH
WEDNESDAY AFTERNOON...
* WHAT...HEAVY SNOW LIKELY. TOTAL SNOW ACCUMULATIONS BETWEEN 6 AND 18
INCHES POSSIBLE.
* WHERE...THE MOUNTAINS OF SUMMIT COUNTY, THE MOSQUITO RANGE, THE
INDIAN PEAKS WILDERNESS, AND THE SOUTHERN FRONT RANGE FOOTHILLS.
HEAVIEST SNOWFALL FAVORED ALONG AND NORTH OF I-70.
* WHEN...FROM TUESDAY MORNING THROUGH WEDNESDAY AFTERNOON.
* 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...
MONITOR THE LATEST FORECASTS FOR UPDATES ON THIS APPROACHING STORM.
SOME UNCERTAINTY STILL EXISTS WITH THE STORM TRACK, BUT CONFIDENCE IS
INCREASING THAT IMPACTFUL SNOWFALL WILL DEVELOP.
FOR MORE INFORMATION FROM THE NATIONAL WEATHER SERVICE, VISIT
HTTPS://WEATHER.GOV/BOU
BRQ
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