HailEvidence → hail history → Mason City, IA
Mason City, IA hail history
Every figure below is from the NOAA NCEI Storm Events Database — the official NWS record — counting events recorded within 10 miles of the Mason City city centroid, 1950 to present.
Hail by year — last 15 years
| Year | Hail events ≤ 10 mi | Largest hail |
|---|---|---|
| 2026 | 0 | — |
| 2025 | 1 | 0.88" (nickel) |
| 2024 | 6 | 1.75" (golf ball) |
| 2023 | 3 | 1.00" (quarter) |
| 2022 | 2 | 1.00" (quarter) |
| 2021 | 0 | — |
| 2020 | 5 | 1.00" (quarter) |
| 2019 | 1 | 0.88" (nickel) |
| 2018 | 14 | 1.75" (golf ball) |
| 2017 | 12 | 1.50" (ping pong ball) |
| 2016 | 6 | 1.25" (half dollar) |
| 2015 | 0 | — |
| 2014 | 2 | 1.00" (quarter) |
| 2013 | 10 | 1.75" (golf ball) |
| 2012 | 7 | 1.00" (quarter) |
Note: the current and prior year reflect the latest NCEI compile and grow as NWS finalizes reports; same-day activity appears on this site's storm-day pages before it reaches this table.
Wind and tornado record
- 178 thunderstorm-wind events, strongest 92 mph, most recent 2025-07-27.
- 23 tornado events, most recent 2025-07-28.
Most recent recorded events
| Date | Type | Magnitude | Distance |
|---|---|---|---|
| 2025-07-28 | Tornado | EF0 | 7.9 mi |
| 2025-07-27 | Thunderstorm Wind | 71 mph | 6.5 mi |
| 2025-07-27 | Thunderstorm Wind | 71 mph | 0.5 mi |
| 2025-07-27 | Thunderstorm Wind | 67 mph | 6.8 mi |
| 2025-06-20 | Thunderstorm Wind | 59 mph | 6.6 mi |
| 2025-04-28 | Hail | 0.88" | 1.6 mi |
| 2024-10-24 | Hail | 1.75" | 8.1 mi |
| 2024-10-24 | Hail | 1.00" | 8.1 mi |
| 2024-10-24 | Hail | 0.88" | 0.8 mi |
| 2024-10-24 | Hail | 0.88" | 4 mi |
2025-07-28: “Broadcast media shared drone imagery of a track developing just east of the I-35 and Highway 18 interchange. The tornado primarily tracked through cropland, but did result in tree damage early in the track for an EF0 rating.”
2025-07-27: “Wind gust measured by the Mason City ASOS.”
2025-07-27: “Trees and Branches down in Mason City. Report of at least one tree on a vehicle. Several power poles on fire.”
Disputing a claim at a Mason City address?
This page covers the city. A claim dispute needs the record around your address: every NWS-recorded event within 1, 3 and 10 miles, the disputed date highlighted, citations formatted for an insurance appeal.
Verify an address — $29source: NOAA NCEI Storm Events computed 2026-06-12