National Weather ServiceVirginiaDense Fog AdvisoryArchive to October 1, 2026
Dense Fog Advisories in Virginia
The National Weather Service issued 28 dense fog advisories for Virginia in 2025 and 36 a year on average in 2008-2025; in 2021-2025 it had the 25th most of any state. 2026 through September: 20, 13% below the average of 23 for those months in 2008-2025. Culpeper was covered most often (159 times since 2008).
How many dense fog advisories does Virginia get?
Every dense fog advisory that covered part of Virginia. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 20 |
| 2025 | 28 |
| 2024 | 46 |
| 2023 | 31 |
| 2022 | 47 |
| 2021 | 44 |
| 2020 | 52 |
| 2019 | 36 |
| 2018 | 39 |
| 2017 | 20 |
| 2016 | 27 |
| 2015 | 52 |
| 2014 | 21 |
| 2013 | 38 |
| 2012 | 49 |
| 2011 | 28 |
| 2010 | 26 |
| 2009 | 29 |
| 2008 | 29 |
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 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 Virginia?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Culpeper | 159 | 18 | March 6, 2026 |
| Page | 151 | 25 | August 15, 2026 |
| Shenandoah | 148 | 27 | August 15, 2026 |
| Orange | 147 | 14 | March 6, 2026 |
| Warren | 147 | 25 | August 15, 2026 |
| Clarke | 142 | 24 | August 15, 2026 |
| Frederick | 142 | 25 | August 15, 2026 |
| Madison | 141 | 15 | March 6, 2026 |
| Rappahannock | 141 | 15 | March 6, 2026 |
| Southern Fauquier | 137 | 19 | March 6, 2026 |
| Greene | 133 | 17 | March 6, 2026 |
| Rockingham | 133 | 22 | March 7, 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 Virginia.