Ames, IA · Storm history

Hail Reports in Ames, Iowa — Last 90 Days

NOAA Storm Prediction Center logged 6 hail reports within 25 miles of Ames across 1 storm day, most recently on September 8, 2026. Source: SPC Local Storm Reports (preliminary, may be revised).

Data as of October 24, 2026 (last successful NOAA check). The newest report in the feed is from Oct 23, 2026. The 90-day log is SPC preliminary data. The county history (2017 to June 2026) is the NOAA Storm Events archive, 2014–June 2026; it has no storms after it ends.

  • 2.25 inlargest hail near the city, last 90 days (golf ball size)
  • 27days with hail 1 in or larger in the county, 2014–June 2026
  • 41days with 58+ mph thunderstorm wind, 2014–June 2026
  • #65 of 209among the cities we cover, by hail days of 1 in or more

Has hail hit my Ames roof since it was installed?

County-level hail reports for Ames from the NOAA archive this page uses; a county report is not proof of damage at your Ames address.

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Hail near Ames in the last 90 days

  • 2.25 inLargest hail in 90 days (golf-ball size)
  • 1Hail day near Ames
  • 6SPC reports
  • September 8, 2026Most recent event

Around Ames, the NOAA Storm Prediction Center logged 6 hail reports within 25 miles between September 8 and September 8, 2026, spread over 1 storm day. That day brought stones of 1″ or more, and 0 of the 6 Ames reports with coordinates fell within 10 miles of the city center. In a typical year Ames sees about 5 hail-producing storms.

Ames's storm-climate context

Ames sits in a humid continental climate where roofs face punishment from all directions. The record high of 109 F on July 24, 1901 drives UV degradation and thermal cycling, while the record low of -37 F on January 25, 1894 tests every seal and fastener. Average annual snowfall of 28.3 inches means repeated snow-load stress followed by freeze-thaw cycles that work water under shingles and expand flashing gaps. Central Iowa's hail-prone spring season compounds granule loss on asphalt shingles. Combined, the wide temperature swing and significant snowpack make roof inspections after each winter and after major hailstorms a practical necessity.

Ames reported a 2020 census population of 66,427. Iowa State University is the city's dominant employer at 18,212 workers, followed by Mary Greeley Medical Center (1,407) and the City of Ames (1,382). The university drives a large and stable rental-housing stock where property managers must maintain roofs on a defined cycle, creating steady contractor demand. Historically low unemployment supports homeowner investment in repairs and replacements.

How close the hail came

Of the 6 Ames reports, the closest landed 20.6 miles from the city center on September 8, 2026 (1.50″ at 2 E Ankeny). September 8, 2026 was the heaviest day around Ames, with 6 reports and a top stone of 2.25″. Near Ames, 1 of 1 hail day reached 1″ or larger.

Hail reports by distance from the Ames city center, last 90 days
Distance from city centerReportsLargest
Within 5 miles0—
Within 10 miles0—
Within 25 miles62.25″

Distances are straight-line from the city center to each SPC report point; reports without coordinates are left out of the table.

Hail events near Ames by date

September 8, 2026 6 reports, hail up to 2.25″ (golf-ball size)

Time (UTC)Hail sizeLocationDistance from Ames
2253 2.25″ Ankeny, Polk County 21.0 mi
2317 1.75″ 1 NW Bondurant, Polk County 24.2 mi
2308 1.50″ 2 E Ankeny, Polk County 20.6 mi
2309 1.50″ 3 E Ankeny, Polk County 20.6 mi
2309 1.25″ 1 NW Bondurant, Polk County 24.2 mi
2310 1.25″ 4 SE Ankeny, Polk County 23.4 mi

The Ames tables above list preliminary Local Storm Reports from the NOAA Storm Prediction Center. Sizes are reported hailstone diameters; times are UTC. Reports can be added or corrected for about a day after each event. A quiet log does not mean no hail: small or unreported events happen. The closest report in this window landed 20.6 miles from Ames's center.

View the 6 Ames-area reports on a map

On the Ames map, circle positions are the NOAA SPC report coordinates; tap a circle for the date and hail size.

Hail size: < 1″ 1–1.75″ ≥ 2″ not recorded

How severe was it? The NWS yardstick, applied to Ames's reports

  • 2 in or larger (significant)1
  • 1 to 2 in (severe)5

The National Weather Service calls hail severe at 1″ (quarter size) and significant at 2″ (hen-egg size). Scoring Ames's 6 area reports (filed in Polk County) against that scale: 1 Ames report reached the significant 2″+ tier — stones that crack shingles and break skylights outright, not just bruise them, plus 5 in the severe 1″–2″ band. At these sizes, damage on a Ames roof is rarely visible from the ground, and homeowners policies typically cover it when it is documented promptly.

Hail history in Ames: the long picture

County-level NOAA records for the county behind Ames, 2014–June 2026. Each figure shows its source. Storms after the archive ends are not in these numbers. Ranks count from 1, the highest.

Ames against the 209 cities we cover

  • #65of 209Days with hail 1 in or larger in Ames: middle
  • #61of 209Days with hail 1.75 in or larger (golf ball) in Ames: middle
  • #134of 209Days with 58+ mph thunderstorm wind in Ames: middle
  • #61of 209Tornadoes in Ames: middle
  • #97of 209Reported storm property damage in Ames: middle
  • #149of 209Share of homes built before 1980 in Ames: middle

Hail events by year

Hail events per year in the county, 2017 to 2025 9 2017 30 2018 8 2019 15 2020 1 2021 3 2022 36 2023 9 2024 15 2025
Hail events per year in the county, 2017 to 2025
20179
201830
20198
202015
20211
20223
202336
20249
202515

Ames's county peaked at 36 events in 2023, its busiest full year, out of 126 for 2017 to 2025. In 2017–2025, a 0 means the archive holds no event for that year.

Source: NOAA Storm Events Database, county level, 2017–2025

Hail history at a glance

  • 126Hail events in the county, since 2017 (NOAA)
  • 2.50 inLargest hailstone on record
  • Jun 20, 2025Last recorded event in the archive

For Ames's county, NOAA records a most severe stone of 2.50″ and 126 hail events since 2017, close to 13 every year. Set against that baseline, the 1 hail day near Ames in the 90-day window above runs below the long-term average rate. Check your own Ames address on the hail risk lookup.

Compared to the Iowa county median of 80 hail events since 2017, Ames's county runs 1.6× above average.

Three ways a storm reaches a roof

Hail

  • 1 in or larger (quarter)27
  • 1.75 in or larger (golf ball)8

Ames's county days with at least one report at that size. Largest stone: 2.75 in.

Source: NOAA Storm Events Database, 2014–June 2026

Thunderstorm wind

41 Ames's county days with 58+ mph

58 mph is the NWS severe threshold. Strongest gust on record in Ames's county: 100 mph on Aug 10, 2020.

Source: NOAA Storm Events Database, 2014–June 2026

Tornadoes

12 in Ames's county

Strongest tornado in Ames's county: EF2 on the Enhanced Fujita scale.

Source: NOAA Storm Events Database, 2014–June 2026

Peak storm month

May

In Ames's county, 76 of 259 hail, wind and tornado reports (29%) fell in May.

Source: NOAA Storm Events, 2014–June 2026

Older homes

40% of Ames homes built before 1980

About 11,000 of Ames's 27,706 housing units (share times units, rounded). Median year built: 1991. Housing units, not roofs: many Ames homes have been re-roofed since.

Source: Census ACS (Ames city), 2019–2023
Year-by-year table with the largest stone
YearRecorded hail eventsLargest stone
2025 15 1.50″
2024 9 1.25″
2023 busiest largest stone 36 2.50″
2022 3 1.25″
2021 1 0.88″
2020 15 2.50″
2019 8 1.50″
2018 30 2.25″
2017 9 2.00″

NOAA Storm Events archive, Ames's county. Years missing from the table have no record in the archive. * 2026 covers only January to June: NOAA's file ends there, so it is not counted as the worst year or in the yearly average.

2023 was the standout hail year in Ames's county on both counts: the most recorded events (36) and the largest stone (2.50″).

In a market with repeat hail, impact-resistant Class 4 shingles often pay for themselves through insurer premium discounts — worth discussing with a Ames roofer if a recent event tips you into a replacement.

Ames, Iowa: Ames Iowa Main Street
Ames, IA. Photo: Tim Kiser (w:User:Malepheasant), CC BY-SA 2.5, via Wikimedia Commons.

Story County fact sheet for Ames homeowners

Housing age, federal disaster declarations and your state's claim deadlines in one place. All three come from public records, county level.

How old are the roofs? Homes in Story County by decade built

Share of Story County homes by decade built, percent 14.6% pre-1940 2.6% 1940s 7.1% 1950s 9.6% 1960s 13.7% 1970s 7.6% 1980s 14.1% 1990s 15.2% 2000s 14.0% 2010s 1.4% 2020+
Share of Story County homes by decade built, percent
pre-194014.6%
1940s2.6%
1950s7.1%
1960s9.6%
1970s13.7%
1980s7.6%
1990s14.1%
2000s15.2%
2010s14.0%
2020+1.4%

41,642 homes, median built in 1983. 47.5% date from before 1980 and 15.5% from 2010 on; 56.0% are owner-occupied. The most common decade is the 2000s.

Source: U.S. Census Bureau, American Community Survey · data as of ACS 5-year

Federal disaster declarations naming Story County

Since 2014 FEMA has named Story County 4 times, split 4 storm-type, 0 flood, 0 winter, 0 fire. Over the same stretch NOAA counts in Story County 27 hail days of 1 in or more, spread over 9 of 12 full years. The latest in Story County was 14 days ago.

Source: OpenFEMA Disaster Declarations Summaries · data as of declarations since 2014

What to do if your roof was in the hail path

Hail-bruised asphalt shingles — the kind of damage to look for after a storm near Ames; example photo, not a Ames roof
What hail bruising on asphalt shingles looks like. Example photo, not a Ames roof.
  1. Stay off the roof and read the yard instead. 20.6 miles from the Ames city center (2 E Ankeny, September 8, 2026) is where the nearest report fell in the last 90 days. Look at your Ames downspouts for granules and at gutters, vents and screens for dents.
  2. Document everything before any repair. September 8, 2026 is the worst day in the Ames log: 6 reports, largest 2.25 in. Dated photos, a hailstone next to a coin and this NOAA log tie the loss to a specific storm day.
  3. Have a roofer look before you decide. The single hail day near Ames reached 1 inch or more, yet from the ground a Ames roof can look fine while bruising and granule loss sit on it. Only a roofer's written scope shows whether there is a claim.
  4. Know the insurer's clocks in Iowa and your own. Hail last fell near Ames 47 days ago. The policy sets your reporting window, while Iowa law sets how fast the insurer must answer (page linked below).
  5. Bring the written scope to the adjuster. A Ames estimate stays honest when the adjuster receives your contractor's written scope. Step-by-step: the roof insurance claim guide.

Insurer clocks for Ames homeowners: rule text, quotes and links on the Iowa claim-deadlines page (checked 2026-10-09). Not legal advice.

Hail in Ames — questions homeowners ask

When did hail last hit Ames, IA?
The most recent NOAA hail report within 25 miles of Ames is from September 8, 2026, with hail up to 2.25″.
How large was the hail near Ames?
The largest hailstone reported near Ames in the last 90 days measured 2.25″ — about golf-ball size. Ames had 1 hail day of 1″ or more, the size where asphalt shingles start to bruise; the biggest came on September 8, 2026.
Does homeowners insurance cover hail damage in Ames?
The latest hail day near Ames was September 8, 2026, 47 days ago, a date a claim can point to. Standard homeowners policies generally cover sudden storm damage and not gradual wear. For a Ames claim, document the damage before repairs, keep this NOAA log as proof of the September 8, 2026 event date, and read your own policy for its filing deadline: the policy sets that window, not a universal rule.
How often does hail hit the Ames area?
In Ames's county, NOAA's archive since 2017 shows 126 recorded hail events. Ames averages about 13 a year, and its biggest stone on record measured 2.50″.
How near to Ames did the nearest hail report fall?
On September 8, 2026, 20.6 miles from the Ames city center, 1.50 in. at 2 E Ankeny: that is the nearest SPC report of the last 90 days.
How long does an insurer in Iowa have to respond to a hail claim?
Iowa sets the insurer's clocks by rule: it must acknowledge a claim within 15 days and tell the homeowner whether it is accepted or denied within 30 days. For Ames homeowners, the deadlines to report and to sue come from the policy and state law. Not legal advice; rule text and links are on the claim-deadlines page, checked 2026-10-09.
Has Story County had federal disaster declarations?
OpenFEMA lists 4 declarations naming Story County since 2014. The most recent was 14 days ago. A declaration is a federal record of a disaster; it does not change what a Ames homeowners policy covers.

Check your own ZIP in Ames

The county figures above average over everything inside the county line. For a score tied to your Ames address, run your ZIP through the hail risk lookup — Ames ZIP codes include 50010, 50011, 50014, 500106, 50012.

Ames neighborhoods — hail exposure varies by area

Hail paths track with storm cell movement, not city limits. If you're in West Ames, Northwest Ames, Old Town Ames, East Village or College Green, check your specific street against the report locations above — distance from Ames's center is listed for each report.

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More resources

Sources: NOAA Storm Prediction Center Local Storm Reports (last 90 days, preliminary) and the NOAA NCEI Storm Events Database (county of the city, 2014–June 2026); U.S. Census Bureau American Community Survey 5-year estimates (housing). The Storm Events archive used here ends in 2025, so storms between that date and the start of the 90-day log are not shown. How we collect data. Are you a roofer in Ames? See how requests reach contractors.

How to cite this page

Free to quote with credit, under CC BY 4.0, no permission needed. The numbers are NOAA Storm Prediction Center preliminary reports: unverified, and not confirmed damage to any roof. This is not an official NOAA or NWS product.