589
WWUS75 KCYS 180715
NPWCYS
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
115 AM MDT MON MAY 18 2026
WYZ102-182230-
/O.UPG.KCYS.FZ.A.0001.260519T0600Z-260519T1600Z/
/O.NEW.KCYS.FZ.W.0002.260519T0200Z-260519T1600Z/
/O.CON.KCYS.FZ.W.0001.260518T1100Z-260518T1600Z/
NIOBRARA COUNTY-
INCLUDING THE CITIES OF REDBIRD AND LUSK
115 AM MDT MON MAY 18 2026
...FREEZE WARNING REMAINS IN EFFECT FROM 5 AM TO 10 AM MDT THIS
MORNING...
...FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 10 AM MDT
TUESDAY...
* WHAT...FOR THE FREEZE WARNING EARLY THIS MORNING, SUB-FREEZING
TEMPERATURES AS LOW AS 26 EXPECTED. FOR THE FREEZE WARNING
TOMORROW NIGHT, SUB-FREEZING TEMPERATURES AS LOW AS 22 POSSIBLE.
* WHERE...NIOBRARA COUNTY.
* WHEN...FOR THE FIRST FREEZE WARNING, FROM 5 AM TO 10 AM MDT THIS
MORNING. FOR THE SECOND FREEZE WARNING, FROM 8 PM THIS EVENING TO
10 AM MDT TUESDAY.
* IMPACTS...FROST AND FREEZE CONDITIONS COULD KILL CROPS, OTHER
SENSITIVE VEGETATION AND POSSIBLY DAMAGE UNPROTECTED OUTDOOR
PLUMBING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
NEZ019-095-096-WYZ101-107-108-182230-
/O.UPG.KCYS.FZ.A.0001.260519T0600Z-260519T1600Z/
/O.NEW.KCYS.FZ.W.0002.260519T0200Z-260519T1600Z/
SCOTTS BLUFF COUNTY-NORTHERN SIOUX COUNTY-SOUTHERN SIOUX COUNTY-
CONVERSE COUNTY LOWER ELEVATIONS-EAST PLATTE COUNTY-GOSHEN COUNTY-
INCLUDING THE CITIES OF SCOTTSBLUFF, WHEATLAND, GLENROCK, GERING,
AGATE, TORRINGTON, BILL, DEER CREEK, GUERNSEY, DOUGLAS, AND
HARRISON
115 AM MDT MON MAY 18 2026
...FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 10 AM MDT
TUESDAY...
* WHAT...SUB-FREEZING TEMPERATURES AS LOW AS 21 EXPECTED.
* WHERE...PORTIONS OF THE PANHANDLE OF NEBRASKA, AND EAST CENTRAL
AND SOUTHEAST WYOMING.
* WHEN...FROM 8 PM THIS EVENING TO 10 AM MDT TUESDAY.
* IMPACTS...FROST AND FREEZE CONDITIONS COULD KILL CROPS, OTHER
SENSITIVE VEGETATION AND POSSIBLY DAMAGE UNPROTECTED OUTDOOR
PLUMBING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
WYZ104-105-109>111-182230-
/O.CON.KCYS.FZ.A.0001.260519T0300Z-260519T1600Z/
FERRIS/SEMINOE/SHIRLEY MOUNTAINS-SHIRLEY BASIN-CENTRAL CARBON
COUNTY-NORTH SNOWY RANGE FOOTHILLS-SOUTHWEST CARBON COUNTY-
INCLUDING THE CITIES OF ELK MOUNTAIN, ARLINGTON, MEDICINE BOW,
SHIRLEY BASIN, BAGGS, SEMINOE DAM, AND RAWLINS
115 AM MDT MON MAY 18 2026
...FREEZE WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH TUESDAY
MORNING...
* WHAT...SUB-FREEZING TEMPERATURES AS LOW AS 15 POSSIBLE.
* WHERE...CENTRAL CARBON COUNTY, FERRIS/SEMINOE/SHIRLEY MOUNTAINS,
NORTH SNOWY RANGE FOOTHILLS, SHIRLEY BASIN, AND SOUTHWEST CARBON
COUNTY.
* WHEN...FROM THIS EVENING THROUGH TUESDAY MORNING.
* IMPACTS...FROST AND FREEZE CONDITIONS COULD KILL CROPS, OTHER
SENSITIVE VEGETATION AND POSSIBLY DAMAGE UNPROTECTED OUTDOOR
PLUMBING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
NEZ002-003-020-021-054-055-WYZ106-113-115>119-182230-
/O.CON.KCYS.FZ.A.0001.260519T0600Z-260519T1600Z/
DAWES COUNTY-BOX BUTTE COUNTY-BANNER COUNTY-MORRILL COUNTY-
KIMBALL COUNTY-CHEYENNE COUNTY-CENTRAL LARAMIE RANGE AND
SOUTHWEST PLATTE COUNTY-UPPER NORTH PLATTE RIVER BASIN-LARAMIE
VALLEY-SOUTH LARAMIE RANGE-SOUTH LARAMIE RANGE FOOTHILLS-CENTRAL
LARAMIE COUNTY-EAST LARAMIE COUNTY-
INCLUDING THE CITIES OF BRIDGEPORT, CHADRON ST PARK, BORDEAUX,
HORSE CREEK, BOSLER, FEDERAL, REDINGTON, WHITAKER, SARATOGA,
LARAMIE, BUFORD, PINE BLUFFS, HEMINGFORD, VEDAUWOO, SIDNEY,
ALLIANCE, BROWNSON, ANGORA, CHEYENNE, KIMBALL, HARRISBURG,
CHADRON, BAYARD, ENCAMPMENT, AND PUMPKIN VINE
115 AM MDT MON MAY 18 2026
...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY
MORNING...
* WHAT...SUB-FREEZING TEMPERATURES AS LOW AS 16 POSSIBLE.
* WHERE...PORTIONS OF PANHANDLE NEBRASKA AND SOUTH CENTRAL AND
SOUTHEAST WYOMING.
* WHEN...FROM LATE TONIGHT THROUGH TUESDAY MORNING.
* IMPACTS...FROST AND FREEZE CONDITIONS COULD KILL CROPS, OTHER
SENSITIVE VEGETATION AND POSSIBLY DAMAGE UNPROTECTED OUTDOOR
PLUMBING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
TRUDEL
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page