National Weather ServiceWyomingFreezing Fog AdvisoryArchive to October 1, 2026
Freezing Fog Advisories in Wyoming
The National Weather Service issued 4 freezing fog advisories for Wyoming in 2025 and 3 a year on average in 2008-2025; in 2021-2025 it had the 9th most of any state. 2026 through September: 2, 24% above the average of 2 for those months in 2008-2025. South Laramie Range Foothills was covered most often (29 times since 2008).
How many freezing fog advisories does Wyoming get?
Every freezing fog advisory that covered part of Wyoming. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 2 |
| 2025 | 4 |
| 2024 | 2 |
| 2023 | 4 |
| 2022 | 1 |
| 2021 | 9 |
| 2020 | 13 |
| 2019 | 9 |
| 2018 | 3 |
| 2017 | 5 |
| 2016 | 0 |
| 2015 | 1 |
| 2014 | 0 |
| 2013 | 0 |
| 2012 | 0 |
| 2011 | 0 |
| 2010 | 1 |
| 2009 | 1 |
| 2008 | 0 |
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
When in the year does Wyoming get them?
Sum of 2008-2025; the busiest month is labelled.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
Where in Wyoming?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| South Laramie Range Foothills | 29 | 11 | January 31, 2026 |
| South Laramie Range | 28 | 7 | January 23, 2026 |
| Central Laramie County | 22 | 9 | January 31, 2026 |
| East Laramie County | 15 | 5 | January 31, 2026 |
| Converse County Lower Elevations | 6 | 0 | January 27, 2021 |
| East Platte County | 5 | 0 | January 27, 2021 |
| Central Laramie Range and Southwest Platte County | 3 | 0 | November 29, 2019 |
| Goshen County | 3 | 0 | November 29, 2019 |
| Laramie Valley | 3 | 0 | November 14, 2019 |
| Northeastern Crook | 3 | 0 | December 18, 2022 |
| Central Carbon County | 2 | 0 | March 17, 2020 |
| Wind River Basin | 2 | 0 | December 29, 2020 |
The NWS issues these products for counties or forecast zones; a zone can be part of a county or a mountain range.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
What is a freezing fog advisory?
A freezing fog advisory means fog will freeze on roads, bridges and other surfaces, making them slippery while it cuts visibility. An advisory is issued for a hazard less serious than a warning that can still cause inconvenience or danger if people are not careful. The national record · Every warning type in Wyoming.