Enter any address in Knox County, Texas to see its FEMA flood zone
Flash flooding from severe thunderstorms is the dominant flood character in Knox County. Between 2000 and 2020, NOAA Storm Events data recorded 17 flash flood events and 10 flood events in the county. Recent occurrences include flash flooding reported on May 7, 2023, following repeated rounds of heavy rainfall, and significant urban and river flooding across Knox and Baylor Counties on June 11, 2024, due to multiple rounds of heavy rainfall.
Homeowners in Knox County should be aware of their specific flood risk. Those residing in areas designated as Special Flood Hazard Areas (SFHAs) by FEMA, which are subject to the National Flood Insurance Program (NFIP), should pay particular attention. Properties located near waterways or in low-lying areas are also more susceptible to flooding.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
5 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Knox County, Texas has recorded 27 flood-related events since 1996 according to NOAA's Storm Events Database, including 17 flash floods and 10 river or area floods. The county has received 17 federal disaster declarations, 1 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1989–2021)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Winter Storm | Severe Ice Storm | Feb 11, 2021 |
| Severe Winter Storms | Severe Ice Storm | Feb 11, 2021 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms And Flooding | Flood | Sep 10, 2018 |
| Severe Winter Storms, Tornadoes, Straight-line Winds, And Flooding | Severe Storm | Dec 26, 2015 |
| Swenson Fire | Fire | Apr 6, 2011 |
| Wildfires | Fire | Apr 6, 2011 |
| Wildfires | Fire | Mar 14, 2008 |
| Extreme Wildfire Threat | Fire | Nov 27, 2005 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Apr 27, 2024 | 20.00K |
| Flood | Jun 11, 2024 | 0.00K |
| Flash Flood | May 7, 2023 | 10.00K |
| Flash Flood | May 7, 2023 | 0.00K |
| Flash Flood | Sep 21, 2018 | 0.00K |
| Flood | May 23, 2015 | 0.00K |
| Flash Flood | Jul 9, 2010 | 0.00K |
| Flood | Oct 16, 2006 | 0.00K |
| Flood | Oct 15, 2006 | 0.00K |
| Flash Flood | Aug 16, 2005 | — |
Flash Flood — Apr 27, 2024
A widespread, long-duration and historic severe weather and tornado outbreak occurred from the late morning through late evening on the 27th. In all, 32 tornadoes affected portions of the WFO Norman Forecast Area, the third most in a single day during the period of reliable record. This included six significant (EF-2+) tornadoes and one violent (EF-4) tornado that struck Marietta (Love County)....
Flood — Jun 11, 2024
Multiple rounds of heavy rainfall from the 10th into the morning of the 11th led to urban and river flooding across portions of western-north Texas. The most significant flooding occurred across Knox and Baylor Counties.
Flash Flood — May 7, 2023
A subtle/low-amplitude trough helped to trigger scattered strong to severe storms across western-north Texas/far southwest Oklahoma on the 7th. A few reports of damaging wind and large hail were noted. Repeated rounds of heavy rainfall across portions of Knox County, Texas lead to reports of flash flooding.
Flash Flood — Sep 21, 2018
Abundant moisture from the gulf and a remnant tropical system converged with a front coming in from northwest early on the morning of the 21st resulting in widespread heavy rain and numerous reports of flash flooding across central and south central Oklahoma and western north Texas through the day.
Flood — May 23, 2015
Another round of severe storms and flooding pummeled the Southern Plains on the 23rd.
Source: NOAA National Weather Service Storm Events Database.
FEMA assigns flood zone designations to areas in Knox County, Texas:
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 Knox County, Texas 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.