Hennepin County, Minnesota

What hazards hit Hennepin County most?

The most frequent records are hail reports: 586 since 1956. 49% of its hail reports since 1956 fell in May and June. The rank column places the county among Minnesota's counties by days with a record per 1,000 square miles of land over each hazard's complete period.

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 Hennepin County had?

NOAA records 31 tornadoes in Hennepin County from 1951 to 2020, the strongest rated F4, with 14 deaths and 307 injuries recorded in the county. That is 8th of 87 Minnesota counties by days with tornadoes per 1,000 square miles since 1950. 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 33 tornadoes whose track touched Hennepin County since 1950 (NOAA's county records number 31: they file a crossing tornado once per county segment, and the two databases differ on some tracks); along their whole tracks they killed 19 people, 14 of them in Hennepin County.

Map of the strongest tornado tracks in Minnesota.

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 Hennepin County?

The most recent record with damage, injuries or deaths is the August 11, 2023 hail ($4.8 million in damage in 2025 dollars).

A picture was shared on social media of hail next to a baseball. The hail was slightly smaller than the baseball.
National Weather Service event narrative, NOAA Storm Events Database (search the full record, event 1134306)

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

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: 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 Hennepin 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).

Source: NOAA NCEI Storm Events Database, records per calendar decade; zone records from the CZ_TYPE field (Z).

What time of year?

49% of its hail reports since 1956 fell in May and June. The two busiest months are in violet.

Source: NOAA NCEI Storm Events Database, records by the month they began.

Federal disaster declarations for Hennepin County

FEMA's register lists 18 declarations that include Hennepin County: 13 major disasters, 5 emergencies and 0 fire management assistance declarations. Most were for flood (7) and severe storm (5).

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 Hennepin County had?

NOAA's Storm Events Database holds 62 flood or flash flood records for Hennepin County from 1997 to 2025, on 45 days, with 0 deaths. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Hennepin County ranks 425th of 2,942 U.S. counties.

The National Flood Insurance Program has paid $4.6 million on 682 claims filed in Hennepin County; the most in one year was 114 in 1987. Claims count insured losses only: uninsured flood damage is not in this file.

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 Hennepin County

FEMA's National Risk Index rates Hennepin County Relatively High overall, with an expected annual loss of $456 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.

Source: FEMA National Risk Index, county table, December 2025 release. FEMA's National Risk Index map.

Counties that share a border with Hennepin County

1. Hennepin County 1,442
2. Wright County 846
3. Dakota County 844
4. Anoka County 770
5. Scott County 673
6. Carver County 659
7. Ramsey County 629
8. Sherburne County 503

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 MinnesotaEvery Minnesota tornado since 1950 and the counties with the most per square mile
• Hail in MinnesotaThe state's hail reports, by county, year and month
• The Minnesota recordEvery hazard in the state, its deadliest events and its federal declarations
• FEMA's risk rating for each hazard in Hennepin CountyThe hazard risk calculator: 18 hazards beside the county's record
• Download Hennepin County's FEMA declarations (CSV)18 rows: every declaration that named the county, for your own analysis