Dense Fog in Wyoming

Events

41

Deaths

2

Injuries

30

Damage

$46,000

• Dense Fog in Wyoming, April 20, 20152 deaths · 25 injured · 1 eventDense fog formed across the Laramie valley during the early morning hours. The combination of the very low visibility and icy road surface contributed to a deadly multi-vehicle pileup on Interstate 80 about 18 miles west of Laramie.
• Dense Fog in Wyoming, February 3 to 5, 19985 injured · $32,000 · 3 eventsDense fog occurred across all of Platte and Laramie Counties, reducing visibilities to less than a quarter of a mile. The Highway Patrol reported 16 accidents over the three-day period, with 5 injuries in Laramie and Albany counties.
• Dense Fog in Wyoming, September 20, 1997$14,000 · 2 eventsWyoming Highway Patrol reported westbound semi rolled over in dense fog at I-80 mile marker 300 at approximately 1745 MST; also reported "1 or 2" vehicle accidents in dense fog near I-80 summit following University of Wyoming football game.
• Dense Fog in Wyoming, December 22 to 23, 20038 eventsVisibilities dropped to as low as one-quarter of a mile at times through this period.
• Dense Fog in Wyoming, February 7 to 8, 20077 eventsA weak cold front stalled over central Wyoming. Areas with snow cover saw rapid development of dense fog in the colder, moist air behind the front.
• High Wind and Dense Fog in Wyoming, September 17 to 22, 202476 kt wind · 6 eventsLocally strong winds up to 88 mph were reported along Interstate 80, Interstate 25, and nearby state highways between Noon September 17th. After a brief lull, winds picked back up to High Wind Warning criteria early in the morning on September 18th.
• Dense Fog in Wyoming, December 1 to 2, 20033 eventsVisibilities dropped to one-quarter of a mile at times during this period.
• Dense Fog in Wyoming, December 5 to 9, 20022 eventsAn area of dense fog persisted for about 4 days across central Fremont county. The visibility was less than 1/4 of a mile for most of this time period. The dense fog was most extensive across the Wind River Basin, in an area from Hudson to Riverton to Shoshoni.
• Dense Fog in Wyoming, November 7, 20032 events
• Dense Fog in Wyoming, November 2 to 3, 20032 events
• Dense Fog in Wyoming, January 10 to 11, 20042 eventsVisibilities frequently dropped to one-quarter of a mile or less at times during this period as reported by Wyoming Department of Transportation and ASOS.
• Dense Fog in Wyoming, February 16, 20042 eventsVisibilities dropped to one-quarter of a mile at times during this period.
• Dense Fog in Wyoming, September 28, 20192 eventsAreas of dense fog limited visibility to motorists traveling along Interstate 80 between Laramie and Cheyenne. With visibility under quarter of a mile, at least 10 vehicles were involved in crashes that subsequently forced the shutdown of the interstate for several hours.
• Dense Fog in Wyoming, November 10 to 11, 19971 eventDense fog reduced the visibility to 150 feet 2 miles north northeast of Woods Landing (25 miles southwest of Laramie).
• Dense Fog in Wyoming, November 12, 19971 eventDense fog reduced visibility to 1/4 mile at Cheyenne.
• Dense Fog in Wyoming, November 29 to 30, 19971 eventDense fog reduced visibilities to less than 200 feet along Interstate 80 from Sinclair west to Sweetwater county.
• Dense Fog in Wyoming, June 3 to 4, 20251 eventA long duration dense fog event occurred late evening June 3rd through the morning of JUne 4th. Fog was observed to be less than a quarter of a mile and as low as a sixteenth of a mile at times.

Dense Fog everywhereEvery kind of event in Wyoming

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.