473
WWUS45 KCYS 171845
WSWCYS
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
1245 PM MDT SUN MAY 17 2026
WYZ112-181200-
/O.UPG.KCYS.WW.Y.0017.260518T0400Z-260519T0000Z/
/O.EXA.KCYS.WS.W.0007.260518T0000Z-260519T0000Z/
SIERRA MADRE RANGE-
1245 PM MDT SUN MAY 17 2026
...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT
MONDAY...
* WHAT...HEAVY SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS UP TO 15
INCHES. WINDS GUSTING AS HIGH AS 50 MPH WITH PERIODS OF BLOWING
AND DRIFTING SNOW.
* WHERE...SIERRA MADRE RANGE.
* WHEN...FROM 6 PM THIS EVENING TO 6 PM MDT MONDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT TO IMPOSSIBLE. THE
HAZARDOUS CONDITIONS COULD IMPACT THE MONDAY MORNING AND EVENING
COMMUTES. STRONG WINDS COULD CAUSE TREE DAMAGE.
* ADDITIONAL DETAILS...NORTH TO NORTHEAST FACING SLOPES AND RIDGES
WILL SEE THE HIGHEST ACCUMULATIONS, WITH ACCUMULATIONS MUCH LOWER
ON THE WESTERN SIDE OF THE RANGE NEAR DIXON AND BAGGS.
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
THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY CALLING 5 1 1.
WYZ103-114-181200-
/O.CON.KCYS.WS.W.0007.260518T0000Z-260519T0000Z/
NORTH LARAMIE RANGE-SNOWY RANGE-
INCLUDING THE CITIES OF GARRETT, CENTENNIAL, AND ALBANY
1245 PM MDT SUN MAY 17 2026
...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO
6 PM MDT MONDAY...
* WHAT...HEAVY SNOW. TOTAL SNOW ACCUMULATIONS 10 TO 20 INCHES
EXPECTED. WINDS COULD GUST AS HIGH AS 30 TO 40 MPH WITH PERIODS OF
BLOWING AND DRIFTING SNOW, ESPECIALLY ABOVE 8500 FEET.
* WHERE...SNOWY RANGE AND NORTH LARAMIE RANGE.
* WHEN...FROM 6 PM THIS EVENING TO 6 PM MDT MONDAY.
* IMPACTS...HEAVY WET SNOW. ROADS, AND ESPECIALLY BRIDGES, WILL
LIKELY BECOME SLICK AND HAZARDOUS.
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
THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY CALLING 5 1 1.
WYZ104-110-181200-
/O.CON.KCYS.WS.W.0007.260518T0000Z-260519T0000Z/
FERRIS/SEMINOE/SHIRLEY MOUNTAINS-NORTH SNOWY RANGE FOOTHILLS-
INCLUDING THE CITIES OF ARLINGTON, SEMINOE DAM, AND ELK MOUNTAIN
1245 PM MDT SUN MAY 17 2026
...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO
6 PM MDT MONDAY...
* WHAT...HEAVY SNOW AND PERIODS OF DRIFTING SNOW. TOTAL SNOW
ACCUMULATIONS 6 TO 12 INCHES WITH HIGHER AMOUNTS NEAR THE
MOUNTAINS. WINDS COULD GUST AS HIGH AS 35 TO 45 MPH WITH PERIODS
OF BLOWING AND DRIFTING SNOW.
* WHERE...NORTH SNOWY RANGE FOOTHILLS INCLUDING ARLINGTON AND ELK
MOUNTAIN ALONG INTERSTATE 80, AND FERRIS/SEMINOE/SHIRLEY MOUNTAINS.
* WHEN...FROM 6 PM THIS EVENING TO 6 PM MDT MONDAY.
* IMPACTS...ROADS, AND ESPECIALLY BRIDGES AND OVERPASSES, WILL
LIKELY BECOME SLICK AND HAZARDOUS. SCATTERED POWER OUTAGES
POSSIBLE DUE TO HEAVY WET SNOW ON TREES AND POWERLINES.
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
THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY CALLING 5 1 1.
PERSONS SHOULD DELAY ALL TRAVEL IF POSSIBLE. IF TRAVEL IS ABSOLUTELY
NECESSARY, DRIVE WITH EXTREME CAUTION AND BE PREPARED FOR SUDDEN
CHANGES IN VISIBILITY. LEAVE PLENTY OF ROOM BETWEEN YOU AND THE
MOTORIST AHEAD OF YOU, AND ALLOW EXTRA TIME TO REACH YOUR
DESTINATION. AVOID SUDDEN BRAKING OR ACCELERATION, AND BE ESPECIALLY
CAUTIOUS ON HILLS OR WHEN MAKING TURNS. MAKE SURE YOUR CAR IS
WINTERIZED AND IN GOOD WORKING ORDER.
WYZ116-181200-
/O.CON.KCYS.WS.W.0007.260518T0000Z-260519T0000Z/
SOUTH LARAMIE RANGE-
INCLUDING THE CITIES OF BUFORD, PUMPKIN VINE, AND VEDAUWOO
1245 PM MDT SUN MAY 17 2026
...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO
6 PM MDT MONDAY...
* WHAT...HEAVY SNOW. TOTAL SNOW ACCUMULATIONS 6 TO 10 INCHES
EXPECTED WITH LOCALLY HIGHER AMOUNTS. WINDS COULD GUST AS HIGH AS
30 TO 40 MPH WITH SOME DRIFTING SNOW EXPECTED.
* WHERE...SOUTH LARAMIE RANGE INCLUDING THE INTERSTATE 80 SUMMIT
BETWEEN CHEYENNE AND LARAMIE.
* WHEN...FROM 6 PM THIS EVENING TO 6 PM MDT MONDAY.
* IMPACTS...ROADS, AND ESPECIALLY BRIDGES AND OVERPASSES, WILL
LIKELY BECOME SLICK AND HAZARDOUS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PERSONS SHOULD DELAY ALL TRAVEL IF POSSIBLE. IF TRAVEL IS ABSOLUTELY
NECESSARY, DRIVE WITH EXTREME CAUTION AND BE PREPARED FOR SUDDEN
CHANGES IN VISIBILITY. LEAVE PLENTY OF ROOM BETWEEN YOU AND THE
MOTORIST AHEAD OF YOU, AND ALLOW EXTRA TIME TO REACH YOUR
DESTINATION. AVOID SUDDEN BRAKING OR ACCELERATION, AND BE ESPECIALLY
CAUTIOUS ON HILLS OR WHEN MAKING TURNS. MAKE SURE YOUR CAR IS
WINTERIZED AND IN GOOD WORKING ORDER.
WYZ109-181200-
/O.CON.KCYS.WS.W.0007.260518T0600Z-260519T0000Z/
CENTRAL CARBON COUNTY-
INCLUDING THE CITIES OF RAWLINS
1245 PM MDT SUN MAY 17 2026
...WINTER STORM WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 6
PM MDT MONDAY...
* WHAT...HEAVY SNOW AND PERIODS OF BLOWING SNOW. TOTAL SNOW
ACCUMULATIONS 5 TO 10 INCHES EXPECTED WITH LOCALLY HIGHER AMOUNTS
NEAR THE MOUNTAINS. WINDS COULD GUST AS HIGH AS 45 MPH.
* WHERE...CENTRAL CARBON COUNTY.
* WHEN...FROM MIDNIGHT TONIGHT TO 6 PM MDT MONDAY.
* IMPACTS...VISIBILITIES MAY DROP BELOW 1/4 MILE DUE TO FALLING AND
BLOWING SNOW.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PERSONS SHOULD DELAY ALL TRAVEL IF POSSIBLE. IF TRAVEL IS ABSOLUTELY
NECESSARY, DRIVE WITH EXTREME CAUTION AND BE PREPARED FOR SUDDEN
CHANGES IN VISIBILITY. LEAVE PLENTY OF ROOM BETWEEN YOU AND THE
MOTORIST AHEAD OF YOU, AND ALLOW EXTRA TIME TO REACH YOUR
DESTINATION. AVOID SUDDEN BRAKING OR ACCELERATION, AND BE ESPECIALLY
CAUTIOUS ON HILLS OR WHEN MAKING TURNS. MAKE SURE YOUR CAR IS
WINTERIZED AND IN GOOD WORKING ORDER.
WYZ111-181200-
/O.EXA.KCYS.WW.Y.0017.260518T0600Z-260519T0000Z/
SOUTHWEST CARBON COUNTY-
INCLUDING THE CITIES OF BAGGS
1245 PM MDT SUN MAY 17 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 6 PM
MDT MONDAY...
* WHAT...SNOW AND PERIODS OF BLOWING SNOW. TOTAL SNOW ACCUMULATIONS
3 TO 6 INCHES, LOCALLY HEAVIER IN THE NORTHERN EXTENT OF THE ZONE.
WINDS GUSTING AS HIGH AS 50 MPH.
* WHERE...SOUTHWEST CARBON COUNTY.
* WHEN...FROM MIDNIGHT TONIGHT TO 6 PM MDT MONDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT. THE HAZARDOUS CONDITIONS
COULD IMPACT THE MONDAY MORNING AND EVENING COMMUTES. STRONG WINDS
COULD CAUSE TREE DAMAGE.
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.
WYZ115-181200-
/O.EXA.KCYS.WW.Y.0017.260518T0600Z-260519T0000Z/
LARAMIE VALLEY-
INCLUDING THE CITIES OF LARAMIE AND BOSLER
1245 PM MDT SUN MAY 17 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 6 PM
MDT MONDAY...
* WHAT...SNOW AND BLOWING SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS
BETWEEN 2 TO 6 INCHES. WINDS GUSTING AS HIGH AS 35 MPH.
* WHERE...LARAMIE VALLEY.
* WHEN...FROM MIDNIGHT TONIGHT TO 6 PM MDT MONDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT. THE HAZARDOUS CONDITIONS
COULD IMPACT THE MONDAY MORNING AND EVENING COMMUTES.
* ADDITIONAL DETAILS...PORTIONS OF THE LARAMIE VALLEY INCLUDING
LARAMIE ITSELF COULD SEE AMOUNTS ON THE LOWER END DUE TO WESTERLY
WINDS, BUT PORTIONS OF THE VALLEY INCLUDING I-80 MAY SEE ON THE
HIGHER END OF THESE AMOUNTS.
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.
WYZ101-105-106-117-181200-
/O.CON.KCYS.WW.Y.0017.260518T0600Z-260519T0000Z/
CONVERSE COUNTY LOWER ELEVATIONS-SHIRLEY BASIN-CENTRAL LARAMIE
RANGE AND SOUTHWEST PLATTE COUNTY-SOUTH LARAMIE RANGE FOOTHILLS-
INCLUDING THE CITIES OF FEDERAL, BORDEAUX, BILL, HORSE CREEK,
DEER CREEK, MEDICINE BOW, DOUGLAS, WHITAKER, GLENROCK, AND
SHIRLEY BASIN
1245 PM MDT SUN MAY 17 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT
TO 6 PM MDT MONDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS 2 TO 6 INCHES.
WINDS GUSTING AS HIGH AS 35 MPH.
* WHERE...CONVERSE COUNTY LOWER ELEVATIONS, SHIRLEY BASIN, CENTRAL
LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY, AND SOUTH LARAMIE RANGE
FOOTHILLS.
* WHEN...FROM MIDNIGHT TONIGHT TO 6 PM MDT MONDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT. THE HAZARDOUS CONDITIONS
COULD IMPACT THE MONDAY MORNING AND EVENING COMMUTES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE PREPARED FOR SLIPPERY ROADS. SLOW DOWN AND USE CAUTION WHILE
DRIVING. IF YOU ARE GOING OUTSIDE, WATCH YOUR FIRST FEW STEPS TAKEN
ON STAIRS, SIDEWALKS, AND DRIVEWAYS. THESE SURFACES COULD BE ICY AND
SLIPPERY, INCREASING YOUR RISK OF A FALL AND INJURY.
CG
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