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 tenderplants from the cold.

&&

$$

MN