National Weather ServiceWisconsinFlood AdvisoryArchive to October 1, 2026
Flood Advisories in Wisconsin
The National Weather Service issued 70 flood advisories for Wisconsin in 2025 and 78 a year on average in 2008-2025; in 2021-2025 it had the 33rd most of any state. 2026 through September: 99, 31% above the average of 76 for those months in 2008-2025. Dane was covered most often (131 times since 2008).
How many flood advisories does Wisconsin get?
Every flood advisory that covered part of Wisconsin. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 99 |
| 2025 | 70 |
| 2024 | 110 |
| 2023 | 42 |
| 2022 | 61 |
| 2021 | 63 |
| 2020 | 95 |
| 2019 | 70 |
| 2018 | 119 |
| 2017 | 102 |
| 2016 | 86 |
| 2015 | 50 |
| 2014 | 106 |
| 2013 | 88 |
| 2012 | 31 |
| 2011 | 85 |
| 2010 | 134 |
| 2009 | 49 |
| 2008 | 48 |
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 Wisconsin 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 Wisconsin?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Dane | 131 | 30 | September 19, 2026 |
| Waukesha | 123 | 34 | September 19, 2026 |
| Milwaukee | 122 | 25 | September 19, 2026 |
| Outagamie | 110 | 28 | September 15, 2026 |
| Rock | 99 | 25 | September 19, 2026 |
| Brown | 99 | 26 | September 15, 2026 |
| Winnebago | 90 | 14 | September 15, 2026 |
| Douglas | 90 | 23 | September 4, 2026 |
| Marinette | 89 | 6 | July 5, 2025 |
| Calumet | 85 | 18 | September 15, 2026 |
| Marathon | 84 | 18 | September 4, 2026 |
| Racine | 82 | 18 | August 10, 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 flood advisory?
A flood advisory covers flooding that is less serious than a warning, such as water on roads or in low-lying areas, that is still a hazard to drivers and walkers. 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 Wisconsin.