Grundy County, Missouri
County storm and disaster record · FIPS 29079 · population 9,796 · 435 sq mi
NOAA's Storm Events Database holds 499 records for Grundy County, Missouri from 1950 through June 30, 2026, on 288 days; the most frequent are hail reports (186 records). The most damaging was the April 10, 1997 heavy snow ($5.5 million in 2025 dollars). FEMA has issued 22 declarations naming the county since 1976, 20 of them for natural hazards; the latest for a natural hazard was “Severe Storms, Straight-Line Winds, Tornadoes, and Flooding” on August 3, 2026.
The record, 1950 to 2026
Storm records filed for the county each year (2026 to June 30, 2026). Before 1996 NOAA recorded only tornadoes (from 1950), thunderstorm wind and hail (from 1955).
- recorded, no damage figure
- under $100,000
- $100,000 or more
- $1 million or more
- $10 million or more, or a death
- $100 million or more, or 10 deaths
- a year's colour: its recorded damage or deaths
- a year with a death
- 1955: wind and hail recorded from 1955
- 1996: all 48 event types from 1996
- Storm records
- 499on 288 days, 1950 to June 30, 2026
- Deaths recorded
- 011 injuries
- Damage, 2025 dollars
- $12Mas filed (scale steps before 1993)
- Tornadoes
- 19strongest F2
- FEMA declarations
- 22latest 2026
Source: NOAA NCEI Storm Events Database, records through June 30, 2026 (file revision 20260918); damage converted to 2025 dollars with the BLS CPI-U. Search the record at NCEI. BLS consumer price index.
What hazards hit Grundy County most?
The most frequent records are hail reports: 186 since 1961. 66% of its hail reports since 1961 fell in May and June. The rank column places the county among Missouri's counties by days with a record per 1,000 square miles of land over each hazard's complete period.
| Hazard | Records | Days | First, last | Killed | Injured | Damage | Rank in state |
|---|---|---|---|---|---|---|---|
| Hail | 186 | 90 | 1961-2026 | 0 | 0 | $469K | 29 of 114 |
| Severe thunderstorm wind | 152 | 104 | 1956-2026 | 0 | 0 | $200K | 28 of 114 |
| Winter storms | 53 | 52 | 1997-2026 | 0 | 2 | $5.5M | 22 of 114 |
| Floods | 39 | 24 | 1996-2023 | 0 | 0 | – | 83 of 114 |
| Drought | 19 | 19 | 2000-2023 | 0 | 0 | – | 46 of 114 |
| Tornadoes | 19 | 14 | 1958-2024 | 0 | 9 | $5.9M | 60 of 114 |
| Heat | 14 | 14 | 1999-2023 | 0 | 0 | – | 54 of 114 |
| Extreme cold | 10 | 10 | 1997-2025 | 0 | 0 | – | 28 of 114 |
| High wind and dust storms | 4 | 4 | 1996-2023 | 0 | 0 | – | 46 of 114 |
| Heavy rain | 3 | 1 | 2011-2011 | 0 | 0 | – | 73 of 114 |
Source: NOAA NCEI Storm Events Database (county and forecast-zone records attributed to the county; a zone record shows its own totals on each county it covers). Days: dates with at least one record of the hazard in the county. Ranks: days with a record per 1,000 square miles of land (Census Bureau 2024 Gazetteer), since 1950 for tornadoes, 1955 for hail and thunderstorm wind, 1996 for the rest.
How many tornadoes has Grundy County had?
NOAA records 19 tornadoes in Grundy County from 1958 to 2024, the strongest rated F2, with 0 deaths and 9 injuries recorded in the county. A tornado that crossed a county line is counted in each county it touched, with the length of its path inside the county.
Counted as whole tornadoes rather than county records, the Storm Prediction Center's database holds 19 tornadoes whose track touched Grundy County since 1950 (NOAA's county records number 19, the same count); along their whole tracks they killed 0 people.
Map of the strongest tornado tracks in Missouri.
Every tornado record filed for Grundy County (19)
| Date | Place | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 2024-04-27 | Spickard, Grundy County | EF0 2.62 mi x 75 yd | 0 | 0 | – |
| 2023-05-06 | Trenton, Grundy County | EF0 0.53 mi x 25 yd | 0 | 0 | – |
| 2021-06-24 | Laredo, Grundy County | EF1 4.88 mi x 75 yd | 0 | 0 | – |
| 2021-06-24 | Dunlap, Grundy County | EF0 5.63 mi x 50 yd | 0 | 0 | – |
| 2021-06-24 | Tindall, Grundy County | EF0 1.66 mi x 25 yd | 0 | 0 | – |
| 2018-10-09 | Spickard, Grundy County | EF0 0.02 mi x 25 yd | 0 | 0 | – |
| 2016-05-30 | Brimson, Grundy County | EF0 0.01 mi x 10 yd | 0 | 0 | – |
| 2016-05-30 | Edinburg, Grundy County | EF0 0.01 mi x 10 yd | 0 | 0 | – |
| 2014-03-27 | Parkerton, Grundy County | EF0 12.84 mi x 500 yd | 0 | 0 | – |
| 2008-07-21 | Dunlap, Grundy County | EF0 7.9 mi x 25 yd | 0 | 0 | – |
| 2004-05-29 | Spickard, Grundy County | F0 1 mi x 100 yd | 0 | 0 | – |
| 2004-05-27 | Trenton, Grundy County | F0 0.5 mi x 50 yd | 0 | 0 | – |
| 1977-05-21 | Grundy County | F1 3.8 mi x 150 yd | 0 | 0 | $25K step |
| 1967-04-21 | Grundy County | F2 2.7 mi x 50 yd | 0 | 7 | $25K step |
| 1967-04-21 | Grundy County | F2 3.6 mi x 50 yd | 0 | 0 | $25K step |
| 1965-04-10 | Grundy County | F2 11.1 mi x 50 yd | 0 | 1 | $25K step |
| 1965-04-10 | Grundy County | F2 10.3 mi x 100 yd | 0 | 1 | $250K step |
| 1960-03-29 | Grundy County | F1 0.3 mi x 100 yd | 0 | 0 | $25K step |
| 1958-11-17 | Grundy County | F2 14.9 mi x 50 yd | 0 | 0 | $250K step |
A damage figure marked "step" is a record from before 1993: NOAA then filed damage by category, and the figure is the category as entered, in the dollars of that year, not an estimate of the loss.
Source: NOAA NCEI Storm Events Database, tornado records by county (path length in the county, maximum width); ratings as published: F scale before February 1, 2007, EF scale after. Whole-track figures: NOAA Storm Prediction Center tornado database (1950-2025). SPC severe weather database.
When was the last damaging storm in Grundy County?
The most recent record with damage, injuries or deaths is the August 1, 2015 thunderstorm wind ($2,490 in damage in 2025 dollars).
A tree and a power pole was snapped. The damage was confined to a 3 block radius.
National Weather Service event narrative, NOAA Storm Events Database (search the full record, event 597681)
| Date | Record | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 2026-05-16 | HailTrenton Airport, Grundy County | 1.25 in hail | 0 | 0 | – |
| 2026-05-16 | HailTrenton, Grundy County | 1.25 in hail | 0 | 0 | – |
| 2026-05-16 | HailEdinburg, Grundy County | 1.00 in hail | 0 | 0 | – |
| 2026-05-16 | HailLaredo, Grundy County | 1.75 in hail | 0 | 0 | – |
| 2026-05-16 | Thunderstorm WindTrenton Airport, Grundy County | 52 kt wind | 0 | 0 | – |
| 2026-05-16 | HailLaredo, Grundy County | 2.50 in hail | 0 | 0 | – |
| 2026-05-16 | Thunderstorm WindLaredo, Grundy County | 52 kt wind | 0 | 0 | – |
| 2026-05-16 | Thunderstorm WindLaredo, Grundy County | 52 kt wind | 0 | 0 | – |
| 2026-05-16 | HailLaredo, Grundy County | 1.75 in hail | 0 | 0 | – |
| 2026-05-16 | HailHickory Creek, Grundy County | 2.75 in hail | 0 | 0 | – |
| 2026-05-16 | Thunderstorm WindLaredo, Grundy County | 52 kt wind | 0 | 0 | – |
| 2026-05-16 | HailBrimson, Grundy County | 1.00 in hail | 0 | 0 | – |
Source: NOAA NCEI Storm Events Database; every record of 2025-2026 is listed, earlier ones when they caused deaths, injuries or $250,000 of damage (2025 dollars), and every tornado.
The deadliest and costliest records
| Date | Record | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 1967-04-21 | TornadoGrundy County | F2 2.7 mi x 50 yd | 0 | 7 | $25K step |
| 1997-04-10 | Heavy SnowGrundy County · forecast zone Grundy Heavy wet snow fell across the Northern third of Missouri throughout the day on the 10th followed by a second band of snow during the early morning hours of the 11th. Since temperatures were near or slightly over freezing during the snowfall, some of the snow melted quickly but 6 to 12 inches of snow accumulated with ... | 0 | 2 | $5.5M | |
| 1965-04-10 | TornadoGrundy County | F2 10.3 mi x 100 yd | 0 | 1 | $250K step |
| 1965-04-10 | TornadoGrundy County | F2 11.1 mi x 50 yd | 0 | 1 | $25K step |
A damage figure marked "step" is a record from before 1993: NOAA then filed damage by category, and the figure is the category as entered, in the dollars of that year, not an estimate of the loss.
| Date | Record | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 1997-04-10 | Heavy SnowGrundy County · forecast zone Grundy | 0 | 2 | $5.5M | |
| 2004-05-27 | HailTrenton, Grundy County | 4.00 in hail | 0 | 0 | $469K |
| 2001-07-03 | Thunderstorm WindTrenton, Grundy County | 70 kt wind | 0 | 0 | $5K |
| 2011-06-26 | Thunderstorm WindTrenton, Grundy County | 70 kt wind | 0 | 0 | $4K |
| 2015-08-01 | Thunderstorm WindTrenton, Grundy County | 65 kt wind | 0 | 0 | $2K |
Before 1993 NOAA filed damage by category, not amount, so the list above starts in 1993. The highest category filed here before then (entered as $250K, in the dollars of the day) holds: April 10, 1965 (tornado, Grundy County); November 17, 1958 (tornado, Grundy County).
Source: NOAA NCEI Storm Events Database: deaths and injuries direct and indirect; damage is property plus crops as estimated by the National Weather Service, converted to 2025 dollars.
Is it getting more frequent?
Records per decade for Grundy County's most frequent hazards. Counts rose everywhere after 1996, when NOAA began recording every event type, so compare decades within a hazard's complete period only (the shaded cells come before it).
| Hazard | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020-26 |
|---|---|---|---|---|---|---|---|---|
| Hail | 0 | 2 | 5 | 0 | 12 | 69 | 59 | 39 |
| Severe thunderstorm wind | 1 | 3 | 6 | 9 | 4 | 45 | 49 | 35 |
| Winter storms | – | – | – | – | 4 | 21 | 22 | 6 |
| Floods | – | – | – | – | 2 | 15 | 20 | 2 |
| Drought | – | – | – | – | 0 | 1 | 15 | 3 |
| Tornadoes | 1 | 5 | 1 | 0 | 0 | 3 | 4 | 5 |
Source: NOAA NCEI Storm Events Database, records per calendar decade; zone records from the CZ_TYPE field (Z).
What time of year?
66% of its hail reports since 1961 fell in May and June. The two busiest months are in violet.
The values, month by month
Jan 20 · Feb 19 · Mar 29 · Apr 37 · May 125 · Jun 108 · Jul 50 · Aug 50 · Sep 20 · Oct 13 · Nov 9 · Dec 19 (records).
Source: NOAA NCEI Storm Events Database, records by the month they began.
Federal disaster declarations for Grundy County
FEMA's register lists 22 declarations that include Grundy County: 16 major disasters, 6 emergencies and 0 fire management assistance declarations. Most were for severe storm (13) and severe ice storm (4).
| Declared | Number | Type | Title |
|---|---|---|---|
| 2026-08-03 | DR-4929 | Severe Storm | Severe Storms, Straight-Line Winds, Tornadoes, and Flooding |
| 2023-09-21 | DR-4741 | Severe Storm | Severe Storms, Straight-Line Winds, Tornadoes, and Flooding |
| 2021-09-01 | DR-4612 | Severe Storm | Severe Storms, Straight-Line Winds, Tornadoes, and Flooding |
| 2020-03-26 | DR-4490 | Biological | Covid-19 Pandemic |
| 2020-03-13 | EM-3482 | Biological | Covid-19 |
| 2019-07-09 | DR-4451 | Severe Storm | Severe Storms, Tornadoes, and Flooding |
| 2014-10-31 | DR-4200 | Severe Storm | Severe Storms, Tornadoes, Straight-Line Winds, and Flooding |
| 2011-03-23 | DR-1961 | Severe Storm | Severe Winter Storm and Snowstorm |
| 2011-02-03 | EM-3317 | Severe Storm | Severe Winter Storm |
| 2010-08-17 | DR-1934 | Severe Storm | Severe Storms, Flooding, and Tornadoes |
| 2009-06-19 | DR-1847 | Severe Storm | Severe Storms, Tornadoes, and Flooding |
| 2009-01-30 | EM-3303 | Severe Ice Storm | Severe Winter Storm |
| 2008-06-25 | DR-1773 | Severe Storm | Severe Storms and Flooding |
| 2007-12-27 | DR-1736 | Severe Ice Storm | Severe Winter Storms |
| 2007-12-12 | EM-3281 | Severe Ice Storm | Severe Winter Storms |
| 2007-06-11 | DR-1708 | Severe Storm | Severe Storms and Flooding |
| 2005-09-10 | EM-3232 | Hurricane | Hurricane Katrina Evacuation |
| 2004-06-11 | DR-1524 | Severe Storm | Severe Storms, Tornadoes, and Flooding |
| 2002-05-06 | DR-1412 | Severe Storm | Severe Storms, Tornadoes and Flooding |
| 2002-02-06 | DR-1403 | Severe Ice Storm | Severe Winter Ice Storm |
| 1993-07-09 | DR-995 | Flood | Severe Storms & Flooding |
| 1976-09-24 | EM-3017 | Drought | Drought |
Source: FEMA OpenFEMA Disaster Declarations Summaries (v2), declarations through October 2, 2026; one declaration is counted once however many areas it names. OpenFEMA dataset page.
How many floods has Grundy County had?
NOAA's Storm Events Database holds 39 flood or flash flood records for Grundy County from 1996 to 2023, on 24 days, with 0 deaths. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Grundy County ranks 2636th of 2,942 U.S. counties.
The National Flood Insurance Program has paid $158,000 on 4 claims filed in Grundy County; the most in one year was 2 in 2019. Claims count insured losses only: uninsured flood damage is not in this file.
The values, year by year
1995: 1 · 2015: 1 · 2019: 2; the other years: 0.
Source: FEMA OpenFEMA NFIP Redacted Claims, as of September 8, 2026; claims by year of loss, payments in the dollars of the year paid. OpenFEMA dataset page.
FEMA's modeled risk for Grundy County
FEMA's National Risk Index rates Grundy County Very Low overall, with an expected annual loss of $7.7 million. These are FEMA's model estimates of future loss from 18 hazards, not a count of what happened; they can differ from the record above.
| Hazard | Risk rating | Expected annual loss | Modeled frequency |
|---|---|---|---|
| Drought | Relatively Moderate | $1.0M | 16 modeled event-days a year |
| Tornado | Relatively Low | $1.7M | once in about 5 years (modeled) |
| Heat Wave | Relatively Low | $520K | 8.9 modeled event-days a year |
| Cold Wave | Relatively Low | $769K | 4.5 a year (modeled) |
| Hail | Relatively Low | $199K | 4.1 a year (modeled) |
| Lightning | Relatively Low | $104K | 48 a year (modeled) |
| Strong Wind | Relatively Low | $235K | 3.2 a year (modeled) |
| Winter Weather | Relatively Low | $22K | 12 a year (modeled) |
Source: FEMA National Risk Index, county table, December 2025 release. FEMA's National Risk Index map.
Counties that share a border with Grundy County
Source: U.S. Census Bureau county adjacency file; NOAA NCEI Storm Events Database, records since 1950. The Census Bureau's adjacency file.
Next
- Tornadoes in MissouriEvery Missouri tornado since 1950 and the counties with the most per square mile
- Hail in MissouriThe state's hail reports, by county, year and month
- The Missouri recordEvery hazard in the state, its deadliest events and its federal declarations
- FEMA's risk rating for each hazard in Grundy CountyThe hazard risk calculator: 18 hazards beside the county's record
- Download Grundy County's FEMA declarations (CSV)22 rows: every declaration that named the county, for your own analysis