HailEvidence → hail history → Riverdale, IA
Riverdale, 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 Riverdale city centroid, 1950 to present.
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Hail by year — last 15 years
| Year | Hail events ≤ 10 mi | Largest hail |
|---|---|---|
| 2026 | 10 | 1.25" (half dollar) |
| 2025 | 2 | 1.00" (quarter) |
| 2024 | 19 | 1.50" (ping pong ball) |
| 2023 | 32 | 4.00" (softball) |
| 2022 | 8 | 1.00" (quarter) |
| 2021 | 1 | 1.00" (quarter) |
| 2020 | 19 | 2.00" (hen egg) |
| 2019 | 7 | 1.00" (quarter) |
| 2018 | 7 | 1.25" (half dollar) |
| 2017 | 4 | 1.00" (quarter) |
| 2016 | 2 | 0.88" (nickel) |
| 2015 | 17 | 2.00" (hen egg) |
| 2014 | 7 | 1.00" (quarter) |
| 2013 | 13 | 1.50" (ping pong ball) |
| 2012 | 2 | 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
- 552 thunderstorm-wind events, strongest 100 mph, most recent 2026-05-04.
- 39 tornado events, most recent 2025-07-11.
Most recent recorded events
| Date | Type | Magnitude | Distance |
|---|---|---|---|
| 2026-05-18 | Hail | 1.00" | 2.5 mi |
| 2026-05-18 | Hail | 1.25" | 2.4 mi |
| 2026-05-18 | Hail | 1.25" | 3.7 mi |
| 2026-05-04 | Thunderstorm Wind | 64 mph | 8.1 mi |
| 2026-04-23 | Thunderstorm Wind | 75 mph | 1.7 mi |
| 2026-04-23 | Thunderstorm Wind | 70 mph | 6.6 mi |
| 2026-04-23 | Thunderstorm Wind | 70 mph | 8.2 mi |
| 2026-04-17 | Thunderstorm Wind | 66 mph | 8.2 mi |
| 2026-04-02 | Hail | 1.00" | 6.7 mi |
| 2026-04-02 | Hail | 1.00" | 6.3 mi |
2026-05-18: “Half dollar size hail reported by off duty NWS Employee.”
2026-05-04: “A public reported that multiple large tree limbs are down. The largest limb was 16to 18 inches with several limbs 12 to 14 inches in diameter. The time of the event was estimated using radar.”
2026-04-23: “A tree was blown down. The time was estimated using radar data.”
Disputing a claim at a Riverdale address?
This page covers the city. A claim is argued about one property, so start with the free address check — it counts the recorded events around your address, not the city centroid. If you need the record itself in writing, that's the citable verification report — $29.
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Address lookup by the U.S. Census Bureau geocoder. Records: NOAA NCEI Storm Events (final) plus SPC preliminary reports for storms newer than the latest compile — see methodology.
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Nearby hail history
source: NOAA NCEI Storm Events computed 2026-09-10