National Weather ServiceAlaskaDense Fog AdvisoryArchive to October 1, 2026
Dense Fog Advisories in Alaska
The National Weather Service issued 76 dense fog advisories for Alaska in 2025 and 60 a year on average in 2008-2025; in 2021-2025 it had the 15th most of any state. 2026 through September: 51, 24% above the average of 41 for those months in 2008-2025. Anchorage was covered most often (167 times since 2008).
How many dense fog advisories does Alaska get?
Every dense fog advisory that covered part of Alaska. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 51 |
| 2025 | 76 |
| 2024 | 75 |
| 2023 | 78 |
| 2022 | 77 |
| 2021 | 45 |
| 2020 | 54 |
| 2019 | 75 |
| 2018 | 51 |
| 2017 | 37 |
| 2016 | 37 |
| 2015 | 60 |
| 2014 | 74 |
| 2013 | 76 |
| 2012 | 51 |
| 2011 | 38 |
| 2010 | 61 |
| 2009 | 59 |
| 2008 | 56 |
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 Alaska 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 Alaska?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Anchorage | 167 | 47 | August 23, 2026 |
| Inner Channels from Kupreanof Island to Etolin Island | 165 | 0 | September 1, 2022 |
| Middle Tanana Valley | 160 | 5 | August 31, 2023 |
| Juneau Borough and Northern Admiralty Island | 137 | 0 | August 18, 2022 |
| Glacier Bay | 132 | 38 | August 28, 2026 |
| Dixon Entrance to Cape Decision Coastal Area | 117 | 0 | September 1, 2022 |
| Eastern Chichagof Island | 102 | 27 | August 28, 2026 |
| Eastern Baranof Island and Southern Admiralty Island | 89 | 0 | August 24, 2022 |
| Petersburg Borough | 86 | 78 | September 25, 2026 |
| Southern Inner Channels | 86 | 0 | September 1, 2022 |
| Matanuska Valley | 78 | 13 | December 29, 2024 |
| Cape Fairweather to Cape Suckling Coastal Area | 76 | 0 | August 3, 2022 |
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 Alaska.