843
WWUS75 KCYS 191740
NPWCYS
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
1140 AM MDT TUE MAY 19 2026
WYZ104-105-109>111-201200-
/O.EXP.KCYS.FZ.W.0002.000000T0000Z-260519T1800Z/
/O.UPG.KCYS.FZ.A.0002.260520T0300Z-260520T1600Z/
/O.NEW.KCYS.FZ.W.0003.260520T0300Z-260520T1600Z/
FERRIS/SEMINOE/SHIRLEY MOUNTAINS-SHIRLEY BASIN-CENTRAL CARBON
COUNTY-NORTH SNOWY RANGE FOOTHILLS-SOUTHWEST CARBON COUNTY-
INCLUDING THE CITIES OF RAWLINS, BAGGS, MEDICINE BOW, SEMINOE
DAM, ELK MOUNTAIN, ARLINGTON, AND SHIRLEY BASIN
1140 AM MDT TUE MAY 19 2026
...FREEZE WARNING IN EFFECT FROM 9 PM THIS EVENING TO 10 AM MDT
WEDNESDAY...
..FREEZE WARNING WILL EXPIRE AT NOON MDT TODAY
* WHAT...SUB-FREEZING TEMPERATURES BETWEEN 15 AND 25 DEGREES
EXPECTED.
* WHERE...CENTRAL CARBON COUNTY, FERRIS/SEMINOE/SHIRLEY MOUNTAINS,
NORTH SNOWY RANGE FOOTHILLS, SHIRLEY BASIN, AND SOUTHWEST CARBON
COUNTY.
* WHEN...FROM 9 PM THIS EVENING TO 10 AM MDT WEDNESDAY.
* 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.
WYZ113-116-201200-
/O.UPG.KCYS.FZ.A.0002.260520T0300Z-260520T1600Z/
/O.NEW.KCYS.FZ.W.0003.260520T0300Z-260520T1600Z/
UPPER NORTH PLATTE RIVER BASIN-SOUTH LARAMIE RANGE-
INCLUDING THE CITIES OF VEDAUWOO, BUFORD, SARATOGA, ENCAMPMENT,
AND PUMPKIN VINE
1140 AM MDT TUE MAY 19 2026
...FREEZE WARNING IN EFFECT FROM 9 PM THIS EVENING TO 10 AM MDT
WEDNESDAY...
* WHAT...SUB-FREEZING TEMPERATURES BETWEEN 20 AND 30 DEGREES
EXPECTED.
* WHERE...UPPER NORTH PLATTE RIVER BASIN AND SOUTH LARAMIE RANGE.
* WHEN...FROM 9 PM THIS EVENING TO 10 AM MDT WEDNESDAY.
* 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.
WYZ101-115-201200-
/O.UPG.KCYS.FZ.A.0002.260520T0600Z-260520T1400Z/
/O.NEW.KCYS.FZ.W.0003.260520T0600Z-260520T1400Z/
CONVERSE COUNTY LOWER ELEVATIONS-LARAMIE VALLEY-
INCLUDING THE CITIES OF DOUGLAS, DEER CREEK, LARAMIE, BILL,
BOSLER, AND GLENROCK
1140 AM MDT TUE MAY 19 2026
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM MDT
WEDNESDAY...
* WHAT...SUB-FREEZING TEMPERATURES BETWEEN 25 AND 32 DEGREES
EXPECTED.
* WHERE...CONVERSE COUNTY LOWER ELEVATIONS AND LARAMIE VALLEY.
* WHEN...FROM MIDNIGHT TONIGHT TO 8 AM MDT WEDNESDAY.
* 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.
NEZ095-WYZ102-106-107-117-201200-
/O.NEW.KCYS.FR.Y.0001.260520T0600Z-260520T1400Z/
NORTHERN SIOUX COUNTY-NIOBRARA COUNTY-CENTRAL LARAMIE RANGE AND
SOUTHWEST PLATTE COUNTY-EAST PLATTE COUNTY-SOUTH LARAMIE RANGE
FOOTHILLS-
INCLUDING THE CITIES OF GUERNSEY, FEDERAL, BORDEAUX, REDBIRD,
HARRISON, WHITAKER, WHEATLAND, HORSE CREEK, AND LUSK
1140 AM MDT TUE MAY 19 2026
...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM MDT
WEDNESDAY...
* WHAT...TEMPERATURES AS LOW AS 28 WILL RESULT IN FROST FORMATION.
* WHERE...IN NEBRASKA, NORTHERN SIOUX COUNTY. IN WYOMING, NIOBRARA
COUNTY, CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY, EAST
PLATTE COUNTY, AND SOUTH LARAMIE RANGE FOOTHILLS.
* WHEN...FROM MIDNIGHT TONIGHT TO 8 AM MDT WEDNESDAY.
* IMPACTS...FROST COULD HARM SENSITIVE OUTDOOR VEGETATION. SENSITIVE
OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
MN
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