Enter any address in Linn County, Missouri to see its FEMA flood zone
Flash flooding from thunderstorms is the dominant flood character in Linn County, MO. Over the last 30 years, the NOAA Storm Events Database recorded 18 flash flood events and 4 flood events. Recent examples include widespread road closures due to heavy rain on April 5, 2017, and flooding caused by torrential rains from sub-severe thunderstorms on May 21, 2019.
National Flood Insurance Program (NFIP) data shows that while Zone A properties have experienced the most claims (12), Zone X properties have also seen claims with an average water depth of 13.5 feet. Homeowners in Zone A, Zone X, and areas with unknown flood risk should pay close attention to flood information.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
3 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Linn County, Missouri has recorded 22 flood-related events since 1996 according to NOAA's Storm Events Database, including 18 flash floods and 4 river or area floods. The county has received 22 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 (1976–2020)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms, Tornadoes, And Flooding | Severe Storm | Apr 29, 2019 |
| Severe Storms, Tornadoes, Straight-line Winds, And Flooding | Severe Storm | May 15, 2015 |
| Severe Storms, Tornadoes, Straight-line Winds, And Flooding | Severe Storm | Sep 9, 2014 |
| Severe Winter Storm | Severe Storm | Jan 31, 2011 |
| Severe Winter Storm And Snowstorm | Severe Storm | Jan 31, 2011 |
| Severe Storms, Flooding, And Tornadoes | Severe Storm | Jun 12, 2010 |
| Severe Winter Storm | Severe Ice Storm | Jan 26, 2009 |
| Severe Storms, Flooding, And A Tornado | Severe Storm | Sep 11, 2008 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | Jun 9, 2020 | 0.00K |
| Flood | May 21, 2019 | 0.00K |
| Flood | Apr 5, 2017 | 0.00K |
| Flash Flood | Jun 22, 2015 | 0.00K |
| Flash Flood | Jul 19, 2015 | 0.00K |
| Flash Flood | Sep 10, 2014 | 0.00K |
| Flash Flood | May 12, 2010 | 0.00K |
| Flash Flood | Aug 17, 2009 | 0.00K |
| Flood | Jun 25, 2008 | 0.00K |
| Flash Flood | Jun 25, 2008 | 0.00K |
Flood — Jun 9, 2020
A brief tornado formed near I-29 close to the town of Oregon, Missouri. This tornado was filmed, so while video evidence exists, there was no reported damage from this brief tornado. Ongoing moderate to heavy rain caused some roads to be closed in central Missouri through most of the day.
Flood — May 21, 2019
A line of generally sub-severe thunderstorms moved through the region during the early morning hours on May 21. These storms didn't produce any severe winds or hail, but as they moved east wake low winds produced damage consisting of several tree limbs down as well as power lines and power poles. The storms then went on to produce torrential rains which caused areas of flooding.
Flood — Apr 5, 2017
Widespread moderate to heavy rain resulted in numerous roads across northern Missouri to be flooded. Impacts were rather low, as most of these closures were soon resolved once the water receded.
Flash Flood — Jun 22, 2015
On the evening of June 20, an MCS was moving southeastward out of Iowa, into northeastern Missouri. Widespread thunderstorms formed on the southern flank of the original MCS causing widespread thunderstorm wind damage and some large hail up to the size of golf balls. As the boundary slid southward through the day on June 21 storms continued to form, bringing more wind damage and hail, this time...
Flash Flood — Jul 19, 2015
A thunderstorm complex moved across northern Missouri producing heavy rain and localized flash flooding.
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 Linn County, Missouri:
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 Linn County, Missouri 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.