National Weather ServiceOklahomaDense Fog AdvisoryArchive to October 1, 2026
Dense Fog Advisories in Oklahoma
The National Weather Service issued 57 dense fog advisories for Oklahoma in 2025 and 38 a year on average in 2008-2025; in 2021-2025 it had the 24th most of any state. 2026 through September: 18, 18% below the average of 22 for those months in 2008-2025. Grady was covered most often (174 times since 2008).
How many dense fog advisories does Oklahoma get?
Every dense fog advisory that covered part of Oklahoma. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 18 |
| 2025 | 57 |
| 2024 | 62 |
| 2023 | 32 |
| 2022 | 36 |
| 2021 | 36 |
| 2020 | 54 |
| 2019 | 54 |
| 2018 | 35 |
| 2017 | 33 |
| 2016 | 37 |
| 2015 | 26 |
| 2014 | 37 |
| 2013 | 34 |
| 2012 | 26 |
| 2011 | 33 |
| 2010 | 33 |
| 2009 | 30 |
| 2008 | 22 |
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 Oklahoma 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 Oklahoma?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Grady | 174 | 35 | March 5, 2026 |
| Canadian | 173 | 36 | March 5, 2026 |
| Caddo | 172 | 38 | April 16, 2026 |
| Comanche | 166 | 33 | April 16, 2026 |
| Oklahoma | 164 | 32 | March 5, 2026 |
| Garvin | 161 | 32 | July 14, 2026 |
| Cleveland | 160 | 31 | March 5, 2026 |
| McClain | 160 | 31 | March 5, 2026 |
| Murray | 157 | 35 | July 14, 2026 |
| Carter | 154 | 36 | July 14, 2026 |
| Kiowa | 154 | 30 | April 16, 2026 |
| Kingfisher | 153 | 29 | March 5, 2026 |
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 dense fog advisory?
A dense fog advisory means fog will cut visibility to a quarter mile or less over a wide area. 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 Oklahoma.