Enter any address in Grant County, Oklahoma to see its FEMA flood zone
Flash flooding from severe thunderstorms is the dominant flood character in Grant County. Between 1993 and 2023, NOAA Storm Events data recorded 32 flash flood events and 13 flood events. Recent examples include widespread severe weather that caused flash flooding on May 20, 2019, and a large line of thunderstorms that produced flooding on July 5, 2019.
National Flood Insurance Program (NFIP) claims data for Grant County shows that properties in Zone A have experienced an average of $14,572 in payouts with an average water depth of 2.8 feet. One claim in an unknown flood zone had an average payout of $6,219 with an average water depth of 1.0 foot. Homeowners in areas designated as Zone A, or those with properties near potential floodwaters, should pay the most attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
2 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Grant County, Oklahoma has recorded 45 flood-related events since 1996 according to NOAA's Storm Events Database, including 32 flash floods and 13 river or area floods. The county has received 32 federal disaster declarations, 3 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1973–2021)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Winter Storm | Severe Ice Storm | Feb 8, 2021 |
| Severe Winter Storms | Severe Ice Storm | Feb 8, 2021 |
| Severe Winter Storm | Severe Ice Storm | Oct 26, 2020 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms, Straight-line Winds, Tornadoes, And Flooding | Severe Storm | May 7, 2019 |
| Severe Winter Storms And Flooding | Severe Storm | Dec 26, 2015 |
| Severe Winter Storms And Flooding | Severe Ice Storm | Nov 27, 2015 |
| Severe Storms, Tornadoes, Straight-line Winds, And Flooding | Severe Storm | May 5, 2015 |
| Severe Winter Storm And Snowstorm | Severe Storm | Feb 24, 2013 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | May 21, 2019 | 0.00K |
| Flash Flood | May 20, 2019 | 0.00K |
| Flood | May 7, 2019 | 0.00K |
| Flash Flood | Oct 6, 2016 | 0.00K |
| Flash Flood | Oct 4, 2016 | 0.00K |
| Flash Flood | Aug 17, 2009 | 0.00K |
| Flood | Sep 13, 2008 | 0.00K |
| Flood | Sep 12, 2008 | 0.00K |
| Flash Flood | Sep 12, 2008 | 0.00K |
| Flood | Jul 4, 2005 | — |
Flood — May 21, 2019
An extremely unstable environment led to widespread severe weather across Texas and Oklahoma on the 20th into the morning of the 21st.
Flash Flood — May 20, 2019
An extremely unstable environment led to widespread severe weather across Texas and Oklahoma on the 20th into the morning of the 21st.
Flood — May 7, 2019
Numerous supercell storms were followed by a large line of thunderstorms that produced severe weather on the evening and overnight of the 7th into the 8th.
Flash Flood — Oct 6, 2016
An area of storms formed overnight on the 5th into the morning hours of the 6th in the vicinity of a retreating front across northern Oklahoma.
Flash Flood — Oct 4, 2016
A line of storms extending down from Kansas into northern Oklahoma formed along a cold front on the evening of the 4th. These storms marched eastward acorss the state, and additional storms formed out ahead of the front later that evening.
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 Grant County, Oklahoma:
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 Grant County, Oklahoma 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.