National Weather ServiceIndianaDense Fog AdvisoryArchive to October 1, 2026
Dense Fog Advisories in Indiana
The National Weather Service issued 61 dense fog advisories for Indiana in 2025 and 45 a year on average in 2008-2025; in 2021-2025 it had the 19th most of any state. 2026 through September: 38, 20% above the average of 32 for those months in 2008-2025. Lake was covered most often (156 times since 2008).
How many dense fog advisories does Indiana get?
Every dense fog advisory that covered part of Indiana. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 38 |
| 2025 | 61 |
| 2024 | 55 |
| 2023 | 50 |
| 2022 | 43 |
| 2021 | 55 |
| 2020 | 36 |
| 2019 | 40 |
| 2018 | 57 |
| 2017 | 69 |
| 2016 | 46 |
| 2015 | 56 |
| 2014 | 34 |
| 2013 | 32 |
| 2012 | 41 |
| 2011 | 25 |
| 2010 | 55 |
| 2009 | 32 |
| 2008 | 31 |
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 Indiana 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 Indiana?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Lake | 156 | 30 | September 28, 2026 |
| Porter | 150 | 28 | September 28, 2026 |
| Newton | 141 | 33 | September 28, 2026 |
| Jasper | 137 | 31 | September 28, 2026 |
| Benton | 134 | 31 | September 28, 2026 |
| Steuben | 132 | 36 | August 7, 2026 |
| De Kalb | 126 | 34 | August 7, 2026 |
| Allen | 123 | 33 | August 7, 2026 |
| Lagrange | 121 | 31 | August 7, 2026 |
| Noble | 120 | 32 | August 7, 2026 |
| Whitley | 120 | 31 | August 7, 2026 |
| Elkhart | 115 | 31 | August 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 Indiana.