States › Missouri › Linn County

Linn County, Missouri

Recorded hazard history: storm events since 1950, federal disaster declarations since 1953, flood insurance claims since 1978, and FEMA's risk index.

FIPS 29115 · 11,843 residents (2021) · 616 sq mi · dominant hazard Wind

Hail · 107Tornado · 19Flood · 22Wind · 112Winter · 44

Linn County within Missouri. Dots: HailTornadoFloodWind event locations in the kept record. Boundaries: US Census Bureau.

NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. NCEI storm records through 30 Jun 2026; OpenFEMA declarations refreshed 1 Oct 2026; NFIP claims as of 8 Sep 2026.

The NCEI record lists 353 events for Linn County, Missouri, between 1950 and 2026; damaging wind account for the largest share.

That is 57.3 events per 100 square miles, below the Missouri figure of 106.7, and 298.1 per 10,000 residents against 118.9 statewide.

13 events fall in the 12 months to 30 Jun 2026. NCEI attributes 0 deaths and 16 injuries to events in the county, with property damage estimated at $5.5M and crop damage at $1.0M.

FEMA has designated the county in 23 federal disaster declarations since 1953; the most recent is Severe Storms, Straight-Line Winds, Tornadoes, And Flooding (major disaster, 3 Aug 2026).

National Flood Insurance Program policyholders in the county filed 22 claims since 1978, of which 21 were paid, totalling $215K (about $10K per paid claim). FEMA counts 6 residential flood policies in force.

FEMA's National Risk Index rates the county's overall risk as "Very Low" and its expected annual loss as "Very Low" ($8.4M a year across 18 hazards).

13events, last 12 monthsto 30 Jun 2026

353events since 19500 deaths, 16 injuries recorded

23disaster declarationslast 3 Aug 2026

22NFIP flood claims$215K paid

Compared with Missouri and the United States

Measure	Linn County	Missouri	US
Recorded events since 1950	353	73,339	1,977,440
Events per 100 square miles	57.3	106.7	56.0
Events per 10,000 residents	298.1	118.9	59.6
Events in the last 12 months	13	1,920	62,008
Deaths recorded by NCEI	0	1,009	26,435
Property damage (NCEI estimates)	$5.5M	$12B	$575B
NFIP claims per 1,000 residents	1.9	8.3	8.1
Average paid NFIP claim	$10K	$23K	$43K
Claims per 100 policies in force, last 10 years	50.0	51.0	16.1

County-recorded events plus zone-recorded events whose forecast zone is named for the county. State and US rows include events recorded only by forecast zone. Rates use 2021 Census population and land area.

Events by decade

Hail: 1Tornado: 2Wind: 1

Hail: 1Tornado: 2Wind: 3

Hail: 4Tornado: 3Wind: 5

Hail: 8Tornado: 2Wind: 5

Hail: 13Tornado: 1Flood: 1Wind: 6Winter: 2Heat: 1Cold: 1

Hail: 47Tornado: 3Flood: 14Wind: 29Winter: 15Heat: 11Cold: 3Drought: 1Other: 1

Hail: 21Tornado: 1Flood: 6Wind: 32Winter: 22Heat: 1Cold: 2Drought: 15Other: 1

Hail: 12Tornado: 5Flood: 1Wind: 31Winter: 5Heat: 1Cold: 6Drought: 5

41950s61960s121970s151980s251990s1242000s1012010s662020s

Recorded events in Linn County by decade and hazard group. HailTornadoFloodWindWinterHeatColdDroughtOther NCEI recorded only tornadoes, hail and thunderstorm wind before 1996.

Trend: 218 events in the 20 years to 2025 against 93 in the 20 years before. Reporting practice changed in 1996 and again with automated reports in the 2000s, so decade totals measure the record as much as the weather.

Events by type

Wind112

Hail107

Winter44

Flood22

Drought21

Tornado19

Heat14

Cold12

Other2

Hazard	Events	Deaths	Share of state's events
■ Wind	112	—	0.5%	detail
■ Hail	107	—	0.5%	detail
■ Winter	44	—	0.7%	detail
■ Flood	22	—	0.2%	detail
■ Drought	21	—	0.8%
■ Tornado	19	—	0.6%	detail
■ Heat	14	—	0.4%
■ Cold	12	—	0.7%
■ Other	2	—	0.2%

Hazard pages exist for hail, tornado, flood, wind and winter where the county has at least 10 recorded events. "Other" covers heavy rain, debris flow, dust, funnel clouds and similar reports.

Largest recorded events

Date	Event type	Group	Magnitude	Property damage	Crop damage	Deaths	Injuries	Geography
5 May 1971	Tornado	Tornado	F3	$2.5M	—	—	12	County
21 Apr 1967	Tornado	Tornado	F4	$250K	—	—	2	County
23 Apr 1975	Tornado	Tornado	F3	$250K	—	—	2	County
24 May 2004	Hail	Hail	6.00 in	$1.5M	$1.0M	—	—	County
23 Apr 1975	Tornado	Tornado	F3	$250K	—	—	—	County
24 Oct 2021	Tornado	Tornado	EF2	$250K	—	—	—	County
24 May 2004	Tornado	Tornado	F1	$200K	—	—	—	County
30 Jan 2002	Winter Storm	Winter	—	$100K	—	—	—	Forecast zone

Ranked by deaths, then injuries, then NCEI's damage estimate. Deaths and injuries are NCEI counts (direct plus indirect); no personal details are recorded here.

Federal disaster declarations

Declared	Number	Type	Incident	Title	Programs
3 Aug 2026	DR-4929	Major disaster	Severe Storm	Severe Storms, Straight-Line Winds, Tornadoes, And Flooding	Public assistance
26 Mar 2020	DR-4490	Major disaster	Biological	Covid-19 Pandemic	Individual assistance, Public assistance
13 Mar 2020	EM-3482	Emergency	Biological	Covid-19	Public assistance
9 Jul 2019	DR-4451	Major disaster	Severe Storm	Severe Storms, Tornadoes, And Flooding	Public assistance
7 Aug 2015	DR-4238	Major disaster	Severe Storm	Severe Storms, Tornadoes, Straight-Line Winds, And Flooding	Public assistance
31 Oct 2014	DR-4200	Major disaster	Severe Storm	Severe Storms, Tornadoes, Straight-Line Winds, And Flooding	Public assistance
23 Mar 2011	DR-1961	Major disaster	Severe Storm	Severe Winter Storm And Snowstorm	Public assistance
3 Feb 2011	EM-3317	Emergency	Severe Storm	Severe Winter Storm	Public assistance
17 Aug 2010	DR-1934	Major disaster	Severe Storm	Severe Storms, Flooding, And Tornadoes	Public assistance
30 Jan 2009	EM-3303	Emergency	Severe Ice Storm	Severe Winter Storm	Public assistance
13 Nov 2008	DR-1809	Major disaster	Severe Storm	Severe Storms, Flooding, And A Tornado	Individual assistance, Public assistance
25 Jun 2008	DR-1773	Major disaster	Severe Storm	Severe Storms And Flooding	Individual assistance, Public assistance
27 Dec 2007	DR-1736	Major disaster	Severe Ice Storm	Severe Winter Storms	Public assistance
12 Dec 2007	EM-3281	Emergency	Severe Ice Storm	Severe Winter Storms	Public assistance
11 Jun 2007	DR-1708	Major disaster	Severe Storm	Severe Storms And Flooding	Public assistance
10 Sep 2005	EM-3232	Emergency	Hurricane	Hurricane Katrina Evacuation	Public assistance
11 Jun 2004	DR-1524	Major disaster	Severe Storm	Severe Storms, Tornadoes, And Flooding	Individual assistance
6 May 2002	DR-1412	Major disaster	Severe Storm	Severe Storms, Tornadoes And Flooding	Public assistance
6 Feb 2002	DR-1403	Major disaster	Severe Ice Storm	Severe Winter Ice Storm	Individual assistance, Public assistance
14 Oct 1998	DR-1253	Major disaster	Severe Storm	Severe Storms, Flooding And Tornadoes	Public assistance
2 Jun 1995	DR-1054	Major disaster	Severe Storm	Severe Storms, Tornadoes, Hail, Flooding	Individual assistance, Public assistance
9 Jul 1993	DR-995	Major disaster	Flood	Severe Storms & Flooding	Individual assistance, Public assistance
24 Sep 1976	EM-3017	Emergency	Drought	Drought	Public assistance

Declarations in which FEMA designated this county, from the OpenFEMA Disaster Declarations Summaries (v2). DR: major disaster; EM: emergency; FM: fire management assistance. Programs show whether individual or public assistance was made available.

Flood insurance claims

197820022026

NFIP claims by year of loss in Linn County, 1978 to 2026 (hover for the amount paid).

Claims since 197822

Paid claims21

Total paid$215K

Average paid claim$10K

Repetitive-loss properties50 severe

Residential policies in force60.1% of 7,587 structures

Year of loss	Claims	Paid claims	Amount paid	Average paid
2019	3	3	$9,195	$3,065
2014	2	2	$24,379	$12,190
2008	6	6	$86,014	$14,336
2002	6	6	$54,191	$9,032
1998	1	0	$0	—
1996	2	2	$16,079	$8,039
1993	1	1	$14,800	$14,800
1979	1	1	$10,042	$10,042

OpenFEMA NFIP claims (v3, as of 8 Sep 2026), aggregated by year of loss; amounts are building, contents and increased-cost-of-compliance payments as recorded. Repetitive-loss counts from the NFIP Multiple Loss Properties file (2 Aug 2026); policies in force from the NFIP Residential Penetration Rates file (3 Aug 2026).

National Risk Index

Overall riskVery Lowscore 31.2 of 100

Expected annual loss$8.4MVery Low

Social vulnerabilityRelatively High

Community resilienceVery High

Hazard (NRI)	Risk rating	Expected annual loss
Inland flooding	Relatively Low	$3,849,650
Tornado	Relatively Moderate	$1,878,372
Cold wave	Relatively Low	$690,895
Heat wave	Relatively Low	$589,944
Drought	Relatively Moderate	$487,945
Strong wind	Relatively Low	$235,791
Hail	Relatively Low	$214,412
Lightning	Relatively Low	$195,475
Earthquake	Very Low	$132,716
Wildfire	Very Low	$40,778
Winter weather	Very Low	$16,180
Ice storm	Very Low	$14,149
Hurricane	Very Low	$3,425
Landslide	Very Low	$2,159

FEMA National Risk Index, December 2025 release. Ratings are FEMA's relative comparison of counties; expected annual loss is FEMA's modelled estimate of average yearly building, population and agriculture loss. See how to read the NRI.

Hurricane and tropical storm passes

No HURDAT2 track at tropical-storm strength passes within 100 miles of the county's centre point (through the 2025 season).

ZIP codes with flood claims

64628 21

ZIP codes whose NFIP claims carry this county's code, with the number of claims. Five or more claims are needed for a ZIP page to be indexed.

Questions and answers

How often does it hail in Linn County, MO?

NCEI records 107 hail events in Linn County since 1950, in 36 different years; that is about 1.4 recorded events a year. 26 reports were golf-ball size (1.75 in) or larger.

Has Linn County had a tornado?

Yes. NCEI records 19 tornadoes in Linn County since 1950, 6 of them rated (E)F2 or stronger. Tornado deaths recorded: 0.

When was the last federal disaster declaration for Linn County?

3 Aug 2026: Severe Storms, Straight-Line Winds, Tornadoes, And Flooding, a major disaster declaration for severe storm. The county appears in 23 declarations since 1953.

How many flood insurance claims have been filed in Linn County, and how much was paid?

22 NFIP claims since 1978, 21 of them paid, for $215K in total. FEMA publishes these figures redacted and aggregated; individual properties are not identified.

Is Linn County in the National Risk Index's high-risk band?

FEMA's National Risk Index (December 2025) rates the county "Very Low" for overall risk, "Very Low" for expected annual loss, "Relatively High" for social vulnerability and "Very High" for community resilience. These ratings are FEMA's relative comparison across all US counties.

How does Linn County compare with the rest of Missouri?

57.3 recorded events per 100 square miles against 106.7 statewide, and 1.9 NFIP claims per 1,000 residents against 8.3. The comparison table on this page shows each measure beside the state and national figures.

Provenance

Storm events: NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026 (public domain). Declarations: OpenFEMA DisasterDeclarationsSummaries v2, refreshed 1 Oct 2026. Flood claims: OpenFEMA NfipClaims v3 as of 8 Sep 2026; NfipMultipleLossProperties v1 (2 Aug 2026); NfipResidentialPenetrationRates v1 (3 Aug 2026). Risk index: FEMA National Risk Index, December 2025. Hurricane tracks: NHC HURDAT2 through 2025. Population and area: US Census Bureau, 2021 vintage. Built 1 Oct 2026; see the methodology and corrections pages. Hazard hubs: Hail · Tornado · Flood · Wind · Winter.