Enter any address in LaSalle Parish, Louisiana to see its FEMA flood zone
Flash flooding from thunderstorms is the most frequent flood event in LaSalle Parish, Louisiana, with 33 occurrences recorded in the last 30 years. This type of flooding was observed on May 6th and August 29th, 2025, driven by atmospheric conditions including stationary frontal boundaries and moist air masses.
National Flood Insurance Program (NFIP) data indicates that properties in Zone A have experienced the highest number of claims, with an average of 149 claims, an average water depth of 7.4 feet, and an average payout of $13,504. Properties in Zone X also show a high average payout of $107,543 with an average water depth of 9.4 feet, despite fewer claims. Homeowners in Zone A and Zone X, as well as those in Zone UNKNOWN with an average water depth of 1.7 feet, should pay particular attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
26 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
LaSalle Parish, Louisiana has recorded 41 flood-related events since 1996 according to NOAA's Storm Events Database, including 33 flash floods and 1 river or area floods. The county has received 38 federal disaster declarations, 11 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1973–2026)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Winter Storm | Winter Storm | Jan 23, 2026 |
| Tropical Storm Francine | Hurricane | Sep 10, 2024 |
| Tropical Storm Nicholas | Coastal Storm | Sep 12, 2021 |
| Hurricane Ida | Hurricane | Aug 26, 2021 |
| Tropical Storm Ida | Hurricane | Aug 26, 2021 |
| Severe Winter Storm | Severe Ice Storm | Feb 11, 2021 |
| Severe Winter Storms | Severe Ice Storm | Feb 11, 2021 |
| Tropical Storm Zeta | Hurricane | Oct 26, 2020 |
| Hurricane Delta | Hurricane | Oct 6, 2020 |
| Hurricane Sally | Hurricane | Sep 13, 2020 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Aug 29, 2025 | 0.00K |
| Flash Flood | May 6, 2025 | 0.00K |
| Flash Flood | Apr 10, 2024 | 0.00K |
| Flash Flood | Nov 9, 2024 | 0.00K |
| Flash Flood | Aug 24, 2022 | 0.00K |
| Tropical Storm | Aug 27, 2020 | 0.00K |
| Flash Flood | Oct 10, 2020 | 0.00K |
| Flash Flood | Oct 9, 2020 | 0.00K |
| Tropical Storm | Oct 9, 2020 | 0.00K |
| Flood | Jan 3, 2019 | 0.00K |
Flash Flood — Aug 29, 2025
Significant banding of heavy showers and thunderstorms with cell-training occurred on the morning of August 29th across East Texas and North Louisiana, posing the threat of flash flooding. A gradual increase in warm air advection and isentropic ascent was noted on the north side of a quasi-stationary frontal boundary and within a very moist and moderately unstable air mass. MUCAPE values ranged...
Flash Flood — May 6, 2025
An upper level low pressure system over the Desert Southwest shifted east through the Intermountain West on May 6th, inducing surface low development over West Texas. This also resulted in a tightening pressure gradient across the Southern Plains and Lower Mississippi Valley, with increased southerly low level winds allowing for a warm front to shift north to the I-20 corridor of East Texas and...
Flash Flood — Apr 10, 2024
A frontal boundary became stationary across the heart of the Ark-La-Tex region in vicinity of the Interstate 30 corridor on April 8th before slowly advancing southeast on April 9th. Concurrently, very moist southwest flow aloft resulting from a nearly cut-off low across the Desert Southwest provided for precipitable water values near 2 inches. Thunderstorms developed and gradually spread nor...
Flash Flood — Nov 9, 2024
An upper trough slowly shifted east across the Central and Southern Plains on November 9th, behind a nearly stationary frontal boundary that extended from portions of Southeast Texas into Central and Northeast Louisiana. While the forcing ahead of the trough and along the front resulted in numerous showers and thunderstorms which moved repeatedly over the same areas of Central and Southwest Lou...
Flash Flood — Aug 24, 2022
A weak frontal boundary and associated surface low pressure remained stationary across North-central Louisiana on August 24th. Precipitable water values were on the order of two inches along and south of this boundary. Meanwhile, a weak shortwave trough began to shift southeastward from the Plains into the Four State Region, which served to reinforce the lift along the frontal boundary and resu...
Source: NOAA National Weather Service Storm Events Database.
Source: OpenFEMA NFIP Individual Claims (2.25M records analyzed).
FEMA assigns flood zone designations to areas in LaSalle Parish, Louisiana:
AE High Risk — 1% annual chance of flooding. Insurance required.
VE Very High Risk — Coastal flooding with wave action.
X (Shaded) Moderate Risk — 500-year floodplain.
X Low Risk — Outside major floodplains.
Properties in LaSalle Parish, Louisiana that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area.
Visit FloodSmart.gov to find an agent and get a quote.