353
WWUS45 KCYS 182041
WSWCYS
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
241 PM MDT MON MAY 18 2026
WYZ110-190000-
/O.EXP.KCYS.BZ.W.0001.000000T0000Z-260518T2100Z/
/O.EXA.KCYS.WW.Y.0017.000000T0000Z-260519T0000Z/
NORTH SNOWY RANGE FOOTHILLS-
INCLUDING THE CITIES OF ELK MOUNTAIN AND ARLINGTON
241 PM MDT MON MAY 18 2026
..WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING
..BLIZZARD WARNING WILL EXPIRE AT 3 PM MDT THIS AFTERNOON
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS UP TO THREE INCHES.
* WHERE...NORTH SNOWY RANGE FOOTHILLS INCLUDING ARLINGTON AND ELK
MOUNTAIN ALONG INTERSTATE 80.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* IMPACTS...HEAVY WET SNOW. ROADS, AND ESPECIALLY BRIDGES, WILL
LIKELY BECOME SLICK AND HAZARDOUS.
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.
WYZ103-114-190000-
/O.CON.KCYS.WS.W.0007.000000T0000Z-260519T0000Z/
NORTH LARAMIE RANGE-SNOWY RANGE-
INCLUDING THE CITIES OF CENTENNIAL, ALBANY, AND GARRETT
241 PM MDT MON MAY 18 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS UP TO THREE INCHES.
* WHERE...SNOWY RANGE AND NORTH LARAMIE RANGE.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* 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.
WYZ104-190000-
/O.CON.KCYS.WS.W.0007.000000T0000Z-260519T0000Z/
FERRIS/SEMINOE/SHIRLEY MOUNTAINS-
INCLUDING THE CITIES OF SEMINOE DAM
241 PM MDT MON MAY 18 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS UP TO THREE INCHES.
* WHERE...NORTH SNOWY RANGE FOOTHILLS INCLUDING ARLINGTON AND ELK
MOUNTAIN ALONG INTERSTATE 80, AND FERRIS/SEMINOE/SHIRLEY MOUNTAINS.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* 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.
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.
WYZ109-190000-
/O.CON.KCYS.WS.W.0007.000000T0000Z-260519T0000Z/
CENTRAL CARBON COUNTY-
INCLUDING THE CITIES OF RAWLINS
241 PM MDT MON MAY 18 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS UP TO THREE INCHES.
WINDS GUSTING AS HIGH AS 45 MPH.
* WHERE...CENTRAL CARBON COUNTY.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* 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.
WYZ112-190000-
/O.CON.KCYS.WS.W.0007.000000T0000Z-260519T0000Z/
SIERRA MADRE RANGE-
241 PM MDT MON MAY 18 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS UP TO 4 INCHES. WINDS
GUSTING AS HIGH AS 40 MPH.
* WHERE...SIERRA MADRE RANGE.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* 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.
WYZ116-190000-
/O.CON.KCYS.WS.W.0007.000000T0000Z-260519T0000Z/
SOUTH LARAMIE RANGE-
INCLUDING THE CITIES OF VEDAUWOO, PUMPKIN VINE, AND BUFORD
241 PM MDT MON MAY 18 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS UP TO TWO INCHES.
* WHERE...SOUTH LARAMIE RANGE INCLUDING THE INTERSTATE 80 SUMMIT
BETWEEN CHEYENNE AND LARAMIE.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* 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.
WYZ101-105-106-117-190000-
/O.CON.KCYS.WW.Y.0017.000000T0000Z-260519T0000Z/
CONVERSE COUNTY LOWER ELEVATIONS-SHIRLEY BASIN-CENTRAL LARAMIE
RANGE AND SOUTHWEST PLATTE COUNTY-SOUTH LARAMIE RANGE FOOTHILLS-
INCLUDING THE CITIES OF MEDICINE BOW, WHITAKER, BORDEAUX,
GLENROCK, FEDERAL, DEER CREEK, DOUGLAS, BILL, SHIRLEY BASIN, AND
HORSE CREEK
241 PM MDT MON MAY 18 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS UP TO TWO INCHES.
* WHERE...CONVERSE COUNTY LOWER ELEVATIONS, SHIRLEY BASIN, CENTRAL
LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY, AND SOUTH LARAMIE RANGE
FOOTHILLS.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* 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.
WYZ111-190000-
/O.CON.KCYS.WW.Y.0017.000000T0000Z-260519T0000Z/
SOUTHWEST CARBON COUNTY-
INCLUDING THE CITIES OF BAGGS
241 PM MDT MON MAY 18 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS UP TO TWO INCHES. WINDS
GUSTING AS HIGH AS 45 MPH.
* WHERE...SOUTHWEST CARBON COUNTY.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS. GUSTY WINDS COULD
BRING DOWN TREE BRANCHES.
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.
WYZ115-190000-
/O.CON.KCYS.WW.Y.0017.000000T0000Z-260519T0000Z/
LARAMIE VALLEY-
INCLUDING THE CITIES OF LARAMIE AND BOSLER
241 PM MDT MON MAY 18 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS UP TO ONE INCH.
* WHERE...LARAMIE VALLEY.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS. THE HAZARDOUS
CONDITIONS COULD IMPACT THE MONDAY EVENING 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.
CG
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