National Weather ServiceLouisianaFlash Flood WarningArchive to October 1, 2026
Flash Flood Warnings in Louisiana
The National Weather Service issued 166 flash flood warnings for Louisiana in 2025 and 125 a year on average in 2008-2025; in 2021-2025 it had the 7th most of any state. 2026 through September: 173, 58% above the average of 110 for those months in 2008-2025. Jefferson was covered most often (223 times since 2008).
How many flash flood warnings does Louisiana get?
Every flash flood warning that covered part of Louisiana. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 173 |
| 2025 | 166 |
| 2024 | 249 |
| 2023 | 98 |
| 2022 | 141 |
| 2021 | 179 |
| 2020 | 94 |
| 2019 | 136 |
| 2018 | 85 |
| 2017 | 115 |
| 2016 | 217 |
| 2015 | 92 |
| 2014 | 74 |
| 2013 | 82 |
| 2012 | 127 |
| 2011 | 57 |
| 2010 | 51 |
| 2009 | 166 |
| 2008 | 126 |
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 Louisiana 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 Louisiana?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Jefferson | 223 | 87 | September 10, 2026 |
| Calcasieu | 209 | 49 | July 14, 2026 |
| Orleans | 202 | 82 | September 10, 2026 |
| St. Martin | 179 | 52 | June 21, 2026 |
| St. Landry | 178 | 43 | June 18, 2026 |
| Beauregard | 168 | 41 | September 5, 2026 |
| Evangeline | 162 | 41 | June 21, 2026 |
| St. Tammany | 161 | 48 | June 20, 2026 |
| East Baton Rouge | 155 | 51 | July 11, 2026 |
| Allen | 153 | 33 | June 21, 2026 |
| Rapides | 153 | 49 | July 13, 2026 |
| Lafayette | 151 | 46 | July 14, 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.
The latest flash flood warnings for Louisiana in AreaZine's record
NWS New OrleansWarningSeptember 10, 2026
Flash Flood Warning: Jefferson, Orleans and Plaquemines, LA
Expired 5:00 p.m. CDT, September 10, 2026
NWS New OrleansWarningSeptember 10, 2026
Flash Flood Warning: Livingston, St. Helena and Tangipahoa, LA
Expired 3:15 p.m. CDT, September 10, 2026
NWS New OrleansWarningSeptember 5, 2026
Flash Flood Warning: Jefferson and Orleans, LA
Expired 7:30 p.m. CDT, September 5, 2026
NWS Lake CharlesWarningSeptember 5, 2026
Flash Flood Warning: Beauregard and Vernon, LA
Expired 5:45 p.m. CDT, September 5, 2026
NWS New OrleansWarningSeptember 5, 2026
Flash Flood Warning: Jefferson and Orleans, LA
Expired 2:00 p.m. CDT, September 5, 2026
NWS New OrleansWarningSeptember 4, 2026
Flash Flood Warning: Jefferson and Orleans, LA
Expired 9:15 a.m. CDT, September 4, 2026
NWS New OrleansWarningAugust 21, 2026
Flash Flood Warning: Jefferson, Orleans and Plaquemines, LA
Expired 6:15 p.m. CDT, August 21, 2026
NWS New OrleansWarningAugust 2, 2026
Flash Flood Warning: Assumption, LA
Expired 11:00 a.m. CDT, August 2, 2026
This list is AreaZine's record of the NWS alert feed, kept since April 6, 2026; the counts above come from the complete IEM archive.
Source: National Weather Service alerts (api.weather.gov).
What is a flash flood warning?
A flash flood warning means flash flooding is happening or about to happen: water rising fast in streams, streets or dry washes, usually within six hours of heavy rain or a dam or levee failure. A warning means the hazard is happening, about to happen, or very likely: act now to protect people and property. The national record · Every warning type in Louisiana.