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St. Louis County, Missouri
Recorded hazard history: storm events since 1950, federal disaster declarations since 1953, flood insurance claims since 1978, and FEMA's risk index.
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.
St. Louis County, Missouri, has 1,459 weather events in the NCEI Storm Events record since 1950, most of them hail.
That is 287.3 events per 100 square miles, above the Missouri figure of 106.7, and 14.6 per 10,000 residents against 118.9 statewide.
24 events fall in the 12 months to 30 Jun 2026. NCEI attributes 29 deaths and 436 injuries to events in the county, with property damage estimated at $1.5B and crop damage at $6K.
FEMA has designated the county in 34 federal disaster declarations since 1953; the most recent is Severe Storms, Straight-Line Winds, Tornadoes, And Flooding (major disaster, 9 Jun 2025).
National Flood Insurance Program policyholders in the county filed 12,031 claims since 1978, of which 9,937 were paid, totalling $265M (about $27K per paid claim). FEMA counts 2,070 residential flood policies in force.
FEMA's National Risk Index rates the county's overall risk as "Relatively High" and its expected annual loss as "Relatively High" ($753M a year across 18 hazards).
3 tropical storm or hurricane tracks in the HURDAT2 record passed within 100 miles of the county's centre at tropical-storm strength or more, 0 of them within 50 miles at hurricane strength.
Compared with Missouri and the United States
| Measure | St. Louis County | Missouri | US |
|---|---|---|---|
| Recorded events since 1950 | 1,459 | 73,339 | 1,977,440 |
| Events per 100 square miles | 287.3 | 106.7 | 56.0 |
| Events per 10,000 residents | 14.6 | 118.9 | 59.6 |
| Events in the last 12 months | 24 | 1,920 | 62,008 |
| Deaths recorded by NCEI | 29 | 1,009 | 26,435 |
| Property damage (NCEI estimates) | $1.5B | $12B | $575B |
| NFIP claims per 1,000 residents | 12.1 | 8.3 | 8.1 |
| Average paid NFIP claim | $27K | $23K | $43K |
| Claims per 100 policies in force, last 10 years | 59.3 | 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
Trend: 757 events in the 20 years to 2025 against 455 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
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 |
|---|---|---|---|---|---|---|---|---|
| 10 Feb 1959 | Tornado | Tornado | F4 | $25M | — | 10 | 170 | County |
| 24 Jan 1967 | Tornado | Tornado | F4 | $25M | — | 3 | 216 | County |
| 14 Sep 2008 | Flash Flood | Flood | — | — | — | 3 | — | County |
| 4 Nov 2024 | Flash Flood | Flood | — | $200K | — | 2 | — | County |
| 31 Dec 2010 | Tornado | Tornado | EF3 | $1.0M | — | 1 | 6 | County |
| 26 Jul 2022 | Flash Flood | Flood | — | $50M | — | 1 | — | County |
| 30 May 2004 | Tornado | Tornado | F1 | $100K | — | 1 | — | County |
| 23 Aug 1996 | Flash Flood | Flood | — | $65K | — | 1 | — | County |
| 24 Jun 2002 | Lightning | Lightning | — | — | — | 1 | — | County |
| 2 Apr 2006 | Thunderstorm Wind | Wind | 69 mph | — | — | 1 | — | County |
| 24 Apr 2007 | Lightning | Lightning | — | — | — | 1 | — | County |
| 9 Jul 2007 | Lightning | Lightning | — | — | — | 1 | — | County |
| 15 Jun 2010 | Lightning | Lightning | — | — | — | 1 | — | County |
| 1 Jul 2023 | Thunderstorm Wind | Wind | 75 mph | — | — | 1 | — | County |
| 16 May 2025 | Thunderstorm Wind | Wind | 69 mph | — | — | 1 | — | County |
| 10 Apr 2001 | Hail | Hail | 2.50 in | $400M | — | — | — | County |
| 10 Apr 2001 | Hail | Hail | 1.50 in | $300M | — | — | — | County |
| 22 Apr 2011 | Tornado | Tornado | EF4 | $250M | — | — | 5 | County |
| 27 Dec 2015 | Flood | Flood | — | $235M | — | — | — | County |
| 7 Apr 1980 | Tornado | Tornado | F3 | $2.5M | — | — | 15 | County |
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 |
|---|---|---|---|---|---|
| 9 Jun 2025 | DR-4877 | Major disaster | Severe Storm | Severe Storms, Straight-Line Winds, Tornadoes, And Flooding | Individual assistance, Public assistance |
| 21 May 2025 | DR-4867 | Major disaster | Severe Storm | Severe Storms, Straight-Line Winds, Tornadoes, And Wildfires | Individual assistance |
| 8 Aug 2022 | DR-4665 | Major disaster | Flood | Severe Storms And Flooding | Individual assistance, 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 |
| 2 Jun 2017 | DR-4317 | Major disaster | Flood | Severe Storms, Tornadoes, Straight-Line Winds And Flooding | Individual assistance, Public assistance |
| 21 Jan 2016 | DR-4250 | Major disaster | Flood | Severe Storms, Tornadoes, Straight-Line Winds, And Flooding | Individual assistance, Public assistance |
| 2 Jan 2016 | EM-3374 | Emergency | Flood | Severe Storms, Tornadoes, Straight-Line Winds, And Flooding | Public assistance |
| 18 Jul 2013 | DR-4130 | Major disaster | Severe Storm | Severe Storms, Straight-Line Winds, Tornadoes, And Flooding | Public assistance |
| 30 Jun 2011 | EM-3325 | Emergency | Flood | Flooding | Public assistance |
| 9 May 2011 | DR-1980 | Major disaster | Severe Storm | Severe Storms, Tornadoes, And Flooding | Individual assistance, Public assistance |
| 3 Feb 2011 | EM-3317 | Emergency | Severe Storm | Severe Winter Storm | 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 |
| 25 Jun 2008 | DR-1773 | Major disaster | Severe Storm | Severe Storms And Flooding | Public assistance |
| 19 Mar 2008 | DR-1749 | Major disaster | Severe Storm | Severe Storms And Flooding | Individual assistance, Public assistance |
| 12 Dec 2007 | EM-3281 | Emergency | Severe Ice Storm | Severe Winter Storms | Public assistance |
| 15 Jan 2007 | DR-1676 | Major disaster | Severe Ice Storm | Severe Winter Storms And Flooding | Public assistance |
| 29 Dec 2006 | DR-1673 | Major disaster | Severe Storm | Severe Winter Storms | Public assistance |
| 21 Jul 2006 | EM-3267 | Emergency | Severe Storm | Severe Storms | Public assistance |
| 10 Sep 2005 | EM-3232 | Emergency | Hurricane | Hurricane Katrina Evacuation | Public assistance |
| 6 May 2003 | DR-1463 | Major disaster | Severe Storm | Severe Storms, Tornadoes, And Flooding | Individual assistance |
| 12 May 2000 | DR-1328 | Major disaster | Flood | Severe Thunderstorms And Flash Flooding | Individual assistance |
| 19 Oct 1998 | DR-1256 | Major disaster | Severe Storm | Severe Storms And Flooding | Individual assistance |
| 2 Jun 1995 | DR-1054 | Major disaster | Severe Storm | Severe Storms, Tornadoes, Hail, Flooding | Individual assistance, Public assistance |
| 21 Apr 1994 | DR-1023 | Major disaster | Severe Storm | Severe Storms, Tornadoes, Flooding | Individual assistance |
| 1 Dec 1993 | DR-1006 | Major disaster | Severe Storm | Severe Storms, Tornadoes, And Flooding | Individual assistance |
| 9 Jul 1993 | DR-995 | Major disaster | Flood | Severe Storms & Flooding | Individual assistance, Public assistance |
| 11 May 1993 | DR-989 | Major disaster | Flood | Severe Storms & Flooding | Individual assistance |
| 14 Oct 1986 | DR-779 | Major disaster | Flood | Severe Storms & Flooding | Individual assistance |
| 10 Dec 1982 | DR-672 | Major disaster | Flood | Severe Storms And Flooding | Individual assistance |
| 21 Apr 1979 | DR-579 | Major disaster | Tornado | Tornadoes, Torrential Rain & Flooding | Individual assistance, Public assistance |
| 24 Sep 1976 | EM-3017 | Emergency | Drought | Drought | Public assistance |
| 19 Apr 1973 | DR-372 | Major disaster | Severe Storm | Heavy Rains, Tornadoes & Flooding | Individual assistance, 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
| Year of loss | Claims | Paid claims | Amount paid | Average paid |
|---|---|---|---|---|
| 2026 | 6 | 2 | $10,473 | $5,236 |
| 2025 | 19 | 8 | $124,074 | $15,509 |
| 2024 | 152 | 120 | $7,595,379 | $63,295 |
| 2023 | 17 | 10 | $410,695 | $41,069 |
| 2022 | 592 | 515 | $44,451,889 | $86,314 |
| 2021 | 6 | 2 | $37,869 | $18,934 |
| 2020 | 112 | 92 | $8,419,713 | $91,519 |
| 2019 | 108 | 89 | $3,598,192 | $40,429 |
| 2018 | 9 | 3 | $26,028 | $8,676 |
| 2017 | 207 | 180 | $13,461,196 | $74,784 |
| 2016 | 63 | 49 | $3,933,604 | $80,278 |
| 2015 | 364 | 299 | $25,754,421 | $86,135 |
| 2014 | 39 | 19 | $459,908 | $24,206 |
| 2013 | 76 | 51 | $1,483,351 | $29,085 |
| 2012 | 6 | 0 | $0 | — |
| 2011 | 79 | 62 | $2,080,617 | $33,558 |
| 2010 | 33 | 21 | $199,716 | $9,510 |
| 2009 | 53 | 32 | $215,789 | $6,743 |
| 2008 | 988 | 872 | $40,155,922 | $46,050 |
| 2007 | 6 | 3 | $97,975 | $32,658 |
| 2006 | 7 | 2 | $19,443 | $9,722 |
| 2005 | 31 | 25 | $390,888 | $15,636 |
| 2004 | 82 | 64 | $1,779,899 | $27,811 |
| 2003 | 59 | 40 | $947,101 | $23,678 |
| 2002 | 75 | 44 | $139,423 | $3,169 |
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
| Hazard (NRI) | Risk rating | Expected annual loss |
|---|---|---|
| Heat wave | $253,179,209 | |
| Inland flooding | $240,321,494 | |
| Earthquake | $140,513,568 | |
| Cold wave | $40,795,775 | |
| Hail | $38,038,474 | |
| Tornado | $26,280,161 | |
| Lightning | $5,473,957 | |
| Ice storm | $3,816,844 | |
| Strong wind | $2,150,691 | |
| Winter weather | $1,507,500 | |
| Landslide | $442,557 | |
| Wildfire | $100,748 | |
| Hurricane | $48,380 | |
| Drought | $19,566 |
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
| Storm | Year | Closest approach | Max wind while within 100 mi |
|---|---|---|---|
| Ike | 2008 | 78 mi | 46 mph |
| Unnamed Atlantic storm | 1941 | 95 mi | 40 mph |
| Unnamed Atlantic storm | 1915 | 98 mi | 40 mph |
HURDAT2 best-track positions at tropical-storm strength (34 kt) or more, measured from the county's Census centre point; through the 2025 season. Distance from a track is not the same as the extent of the storm's wind, rain or surge.
ZIP codes with flood claims
- 63088 2,250
- 63026 1,311
- 63130 1,112
- 63144 675
- 63128 566
- 63129 560
- 63125 388
- 63031 372
- 63135 363
- 63042 360
- 63136 339
- 63124 303
- 63122 285
- 63114 269
- 63123 267
- 63005 240
- 63074 186
- 63137 179
- 63121 178
- 63143 163
- 63033 155
- 63132 145
- 63127 140
- 63021 130
- 63011 114
- 63119 111
- 63131 106
- 63043 104
- 63141 89
- 63001 86
- 63133 84
- 63017 81
- 63138 80
- 63044 75
- 63126 66
- 63146 57
- 63038 48
- 63105 47
- 63117 37
- 63134 22
- 63034 20
- 63108 13
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 St. Louis County, MO?
NCEI records 660 hail events in St. Louis County since 1950, in 65 different years; that is about 8.6 recorded events a year. 167 reports were golf-ball size (1.75 in) or larger.
Has St. Louis County had a tornado?
Yes. NCEI records 58 tornadoes in St. Louis County since 1950, 15 of them rated (E)F2 or stronger. Tornado deaths recorded: 15.
When was the last federal disaster declaration for St. Louis County?
9 Jun 2025: Severe Storms, Straight-Line Winds, Tornadoes, And Flooding, a major disaster declaration for severe storm. The county appears in 34 declarations since 1953.
How many flood insurance claims have been filed in St. Louis County, and how much was paid?
12,031 NFIP claims since 1978, 9,937 of them paid, for $265M in total. FEMA publishes these figures redacted and aggregated; individual properties are not identified.
Is St. Louis County in the National Risk Index's high-risk band?
FEMA's National Risk Index (December 2025) rates the county "Relatively High" for overall risk, "Relatively High" for expected annual loss, "Relatively Low" for social vulnerability and "Relatively High" for community resilience. These ratings are FEMA's relative comparison across all US counties.
How does St. Louis County compare with the rest of Missouri?
287.3 recorded events per 100 square miles against 106.7 statewide, and 12.1 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.