National Weather ServiceNew MexicoDense Fog AdvisoryArchive to October 1, 2026
Dense Fog Advisories in New Mexico
The National Weather Service issued 25 dense fog advisories for New Mexico in 2025 and 12 a year on average in 2008-2025; in 2021-2025 it had the 38th most of any state. 2026 through September: 4, 18% below the average of 5 for those months in 2008-2025. Central Lea County was covered most often (76 times since 2008).
How many dense fog advisories does New Mexico get?
Every dense fog advisory that covered part of New Mexico. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 4 |
| 2025 | 25 |
| 2024 | 18 |
| 2023 | 23 |
| 2022 | 19 |
| 2021 | 14 |
| 2020 | 9 |
| 2019 | 23 |
| 2018 | 16 |
| 2017 | 8 |
| 2016 | 3 |
| 2015 | 7 |
| 2014 | 13 |
| 2013 | 5 |
| 2012 | 5 |
| 2011 | 5 |
| 2010 | 7 |
| 2009 | 4 |
| 2008 | 3 |
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 New Mexico 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 New Mexico?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Central Lea County | 76 | 17 | December 25, 2025 |
| Southern Lea County | 75 | 15 | December 25, 2025 |
| Northern Lea County | 64 | 14 | December 24, 2025 |
| Eddy County Plains | 46 | 6 | November 29, 2025 |
| Curry County | 28 | 8 | October 27, 2025 |
| Roosevelt County | 27 | 7 | October 27, 2025 |
| Chaves County Plains | 22 | 6 | April 24, 2025 |
| Southwest Desert/Lower Gila River Valley | 22 | 6 | January 24, 2026 |
| Central Highlands | 21 | 10 | October 15, 2025 |
| Southern Dona Ana County/Mesilla Valley | 20 | 3 | December 22, 2023 |
| Northern Dona Ana County | 18 | 2 | December 21, 2023 |
| Southern Tularosa Basin | 18 | 1 | August 25, 2023 |
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 New Mexico.