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Dense Fog Advisory 0008
Issued by the Cheyenne Forecast Office

Action Issued Starts Expiration
New 2026-08-16 02:18:13 2026-08-16 02:18:00 2026-08-16 08:00:00
Expired 2026-08-16 07:36:41 2026-08-16 08:00:00
Time Extended 2026-08-16 07:36:41 2026-08-16 09:00:00


Action: New
Issued At: 2026-08-16 02:18:13

249 
WWUS75 KCYS 160718
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
118 AM MDT Sun Aug 16 2026

WYZ116-117-161300-
/O.NEW.KCYS.FG.Y.0008.260816T0718Z-260816T1300Z/
South Laramie Range-South Laramie Range Foothills-
Including the cities of Horse Creek, Federal, Vedauwoo, Pumpkin
Vine, Buford, and Whitaker
118 AM MDT Sun Aug 16 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 7 AM MDT THIS MORNING...

* WHAT...Visibility as low as a quarter mile in dense fog.

* WHERE...South Laramie Range and Foothills including the Interstate 
  80 Summit between Cheyenne and Laramie.

* WHEN...Until 7 AM MDT this morning.

* IMPACTS...Low visibility could make driving conditions hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of 
distance ahead of you.

&&

$$

Mose


Action: Expired
Issued At: 2026-08-16 07:36:41

933 
WWUS75 KCYS 161236
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
636 AM MDT Sun Aug 16 2026

WYZ117-161345-
/O.EXP.KCYS.FG.Y.0008.000000T0000Z-260816T1300Z/
South Laramie Range Foothills-
Including the cities of Whitaker, Horse Creek, and Federal
636 AM MDT Sun Aug 16 2026

...DENSE FOG ADVISORY WILL EXPIRE AT 7 AM MDT THIS MORNING...

Visibility has improved along Interstate 80 from Cheyenne to Buford. 
Therefore, the Dense Fog Advisory will be allowed to expire at 7 AM 
MDT.

$$

WYZ116-161400-
/O.EXT.KCYS.FG.Y.0008.000000T0000Z-260816T1400Z/
South Laramie Range-
Including the cities of Vedauwoo, Pumpkin Vine, and Buford
636 AM MDT Sun Aug 16 2026

...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 8 AM MDT THIS MORNING...

* WHAT...Visibility as low as a quarter mile in dense fog.

* WHERE...South Laramie Range including the Interstate 80 Summit 
  between Cheyenne and Laramie.

* WHEN...Until 8 AM MDT this morning.

* IMPACTS...Low visibility could make driving conditions hazardous.

* ADDITIONAL DETAILS...Very poor visibility continues at the 
  Interstate 80 Summit.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of 
distance ahead of you.

&&

$$

Mose


Action: Time Extended
Issued At: 2026-08-16 07:36:41

933 
WWUS75 KCYS 161236
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
636 AM MDT Sun Aug 16 2026

WYZ117-161345-
/O.EXP.KCYS.FG.Y.0008.000000T0000Z-260816T1300Z/
South Laramie Range Foothills-
Including the cities of Whitaker, Horse Creek, and Federal
636 AM MDT Sun Aug 16 2026

...DENSE FOG ADVISORY WILL EXPIRE AT 7 AM MDT THIS MORNING...

Visibility has improved along Interstate 80 from Cheyenne to Buford. 
Therefore, the Dense Fog Advisory will be allowed to expire at 7 AM 
MDT.

$$

WYZ116-161400-
/O.EXT.KCYS.FG.Y.0008.000000T0000Z-260816T1400Z/
South Laramie Range-
Including the cities of Vedauwoo, Pumpkin Vine, and Buford
636 AM MDT Sun Aug 16 2026

...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 8 AM MDT THIS MORNING...

* WHAT...Visibility as low as a quarter mile in dense fog.

* WHERE...South Laramie Range including the Interstate 80 Summit 
  between Cheyenne and Laramie.

* WHEN...Until 8 AM MDT this morning.

* IMPACTS...Low visibility could make driving conditions hazardous.

* ADDITIONAL DETAILS...Very poor visibility continues at the 
  Interstate 80 Summit.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of 
distance ahead of you.

&&

$$

Mose



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