National Weather ServiceWest VirginiaDense Fog AdvisoryArchive to October 1, 2026
Dense Fog Advisories in West Virginia
The National Weather Service issued 27 dense fog advisories for West Virginia in 2025 and 18 a year on average in 2008-2025; in 2021-2025 it had the 37th most of any state. 2026 through September: 19, 60% above the average of 12 for those months in 2008-2025. Berkeley was covered most often (154 times since 2008).
How many dense fog advisories does West Virginia get?
Every dense fog advisory that covered part of West Virginia. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 19 |
| 2025 | 27 |
| 2024 | 31 |
| 2023 | 14 |
| 2022 | 22 |
| 2021 | 20 |
| 2020 | 27 |
| 2019 | 19 |
| 2018 | 21 |
| 2017 | 17 |
| 2016 | 14 |
| 2015 | 20 |
| 2014 | 13 |
| 2013 | 9 |
| 2012 | 21 |
| 2011 | 12 |
| 2010 | 12 |
| 2009 | 14 |
| 2008 | 10 |
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 West Virginia 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 West Virginia?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Berkeley | 154 | 26 | August 15, 2026 |
| Jefferson | 153 | 25 | August 15, 2026 |
| Morgan | 129 | 25 | August 15, 2026 |
| Eastern Mineral | 116 | 24 | August 21, 2026 |
| Hampshire | 115 | 20 | August 21, 2026 |
| Hardy | 110 | 17 | August 15, 2026 |
| Eastern Grant | 102 | 17 | August 15, 2026 |
| Western Mineral | 63 | 18 | August 21, 2026 |
| Hancock | 60 | 25 | August 21, 2026 |
| Brooke | 59 | 25 | August 21, 2026 |
| Eastern Pendleton | 56 | 11 | March 6, 2026 |
| Ohio | 56 | 22 | August 21, 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 West Virginia.