Waterloo Hail — Storm History & NOAA Data for Waterloo, IA

Data current as of 2026-10-16 · Sourced from NOAA Storm Events

Over the past five years, the National Oceanic and Atmospheric Administration has recorded 92 hail storms within 25 miles of Waterloo, IA. Of those, 84 produced hail at least quarter-size — the threshold most insurance carriers consider potentially damaging to asphalt shingles. The largest reported hail in this window was baseball-sized or larger, which can fracture shingle mat and dent metal flashing on contact. 2026 was the most active year on record locally, with 34 documented hail events.

Hail Severity Breakdown — Waterloo Area (Last 5 Years)

Waterloo Hail Storms by Year

2026 was the busiest hail year on record locally for Waterloo, with 34 documented events inside the 25-mile radius. Storm activity in Waterloo typically peaks in spring and early summer, when the jet stream pushes Gulf moisture into the area and supercell thunderstorms become more frequent.

Notable Recent Waterloo Hail Storms

• August 7, 2026 — Significant hail (quarter-sized or larger) reported near 5 N Dunkerton. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Waterloo-area properties.
• August 7, 2026 — Severe hail (ping pong ball-sized) reported near Fairbank. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Waterloo-area properties.
• August 7, 2026 — Significant hail (quarter-sized or larger) reported near 5 SE Readlyn. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Waterloo-area properties.
• April 15, 2026 — Significant hail (quarter-sized or larger) reported near 1 W La Porte City. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Waterloo-area properties.
• April 15, 2026 — Significant hail (quarter-sized or larger) reported near La Porte City. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Waterloo-area properties.

Recent Hail Events Near Waterloo

Wind Storm History — Waterloo Area (Last 5 Years)

NOAA has recorded 100 high-wind events within 25 miles of Waterloo, IA in the past five years. Of those, 100 reached severe-thunderstorm thresholds (58+ mph). The highest measured gust was 90 mph.

Recent Wind Events Near Waterloo

Frequently Asked Questions About Waterloo Hail

When was the last major hail storm in Waterloo, IA?

The most recent quarter-size-or-larger hail storm recorded by NOAA within 25 miles of Waterloo was on August 7, 2026. HailCheck refreshes from the NOAA Storm Events database daily, so newer events appear here as they are reported.

How often does it hail in Waterloo?

Waterloo averages roughly 18 reported hail events per year within a 25-mile radius. Significant storms (quarter-size or larger) account for 84 of the 92 events recorded over the last five years.

How big does hail typically get in Waterloo?

The largest documented hail near Waterloo in the last five years was baseball-sized or larger. Most Waterloo-area hail falls in the marble-to-quarter range, with destructive storms (egg-size or larger) appearing roughly once every few years.

Does my insurance cover hail damage in IA?

Most homeowners insurance policies in IA cover hail damage to roofs, siding, and gutters under the dwelling and other-structures coverage. Coverage typically requires the damage to be tied to a verifiable storm date — which is where the NOAA hail history above (and a HAAG-style test square validation) becomes important for the claim file.

How do I check hail history for a specific Waterloo address?

Use the HailCheck address search to enter any street address in or near Waterloo. HailCheck returns every NOAA hail event within a configurable radius, along with severity bands, dates, and storm narratives for Pro members.

What a HAAG-Style Test Square Validation Means in Waterloo

If your property in or near Waterloo took on hail during one of the storms above, the standard process for documenting damage is a 10×10 foot test square inspection. A HAAG-trained reviewer counts impact indicators — granule displacement, mat fractures, and bruising — within the marked square and produces a PASS or FAIL document for the claim file.

HailCheck offers a $99 photo-based HAAG-style test square validation. You submit photos from the field, our reviewer evaluates the impact indicators and cross-references the NOAA storm dates listed above, and a written PASS/FAIL determination is returned within one business day. We do not send anyone to the roof — the validation is built around the photos you submit.

Why Waterloo's Location Matters for Hail

Waterloo sits east of the traditional hail alley, where hail events are less frequent than the central plains but tend to be associated with strong squall lines and tropical systems. Local roof systems are less commonly hardened for hail, which can mean even moderate impacts produce claim-worthy damage.

Other Cities in IA

• Des Moines, IA
• Cedar Rapids, IA
• Davenport, IA
• Sioux City, IA
• Iowa City, IA
• Council Bluffs, IA
• Ames, IA
• West Des Moines, IA
• Dubuque, IA
• Ankeny, IA
• Urbandale, IA
• Cedar Falls, IA
• Marion, IA
• Bettendorf, IA
• Marshalltown, IA
• Mason City, IA
• Clinton, IA
• Burlington, IA
• Fort Dodge, IA
• Ottumwa, IA
• Muscatine, IA
• Johnston, IA
• Coralville, IA
• Waukee, IA
• Altoona, IA
• North Liberty, IA