National Weather ServiceIowaFlood AdvisoryArchive to October 1, 2026
Flood Advisories in Iowa
The National Weather Service issued 18 flood advisories for Iowa in 2025 and 30 a year on average in 2008-2025; in 2021-2025 it had the 48th most of any state. 2026 through September: 14, 51% below the average of 29 for those months in 2008-2025. Pottawattamie was covered most often (124 times since 2008).
How many flood advisories does Iowa get?
Every flood advisory that covered part of Iowa. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 14 |
| 2025 | 18 |
| 2024 | 14 |
| 2023 | 12 |
| 2022 | 10 |
| 2021 | 14 |
| 2020 | 5 |
| 2019 | 29 |
| 2018 | 39 |
| 2017 | 9 |
| 2016 | 25 |
| 2015 | 20 |
| 2014 | 46 |
| 2013 | 18 |
| 2012 | 8 |
| 2011 | 29 |
| 2010 | 104 |
| 2009 | 48 |
| 2008 | 83 |
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 Iowa 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 Iowa?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Pottawattamie | 124 | 20 | September 9, 2026 |
| Mills | 76 | 11 | August 10, 2025 |
| Harrison | 60 | 10 | September 9, 2026 |
| Fremont | 56 | 9 | August 19, 2026 |
| Page | 41 | 2 | May 18, 2026 |
| Montgomery | 35 | 2 | June 23, 2025 |
| Clayton | 32 | 4 | July 11, 2025 |
| Monona | 29 | 5 | August 13, 2026 |
| Allamakee | 29 | 5 | August 17, 2025 |
| Fayette | 28 | 3 | July 11, 2025 |
| Shelby | 26 | 8 | September 9, 2026 |
| Black Hawk | 23 | 0 | July 23, 2010 |
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 Iowa.