Hail History

Hail history for Rockwell, Iowa

NOAA hail reports in and within about 5 km (3 miles) of Rockwell since 1986, with preliminary reports to November 3, 2026.

Readout · Rockwell

Last hail
Sep 21, 2016
1.00 in, quarter size
Hail days, last 5 years
0
since Nov 3, 2021 · 0 reports
Largest ever
2.75 in
baseball · Jul 31, 2003

12 reports on 9 days since 1986 · #381 of 483 Iowa places

Hail map · Rockwell

Rockwell Thornton Mason City Rockford Clear Lake Nora Springs 5 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
12 most recent reports with a location; Cerro Gordo County is shaded. Open street map

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What the record says about Rockwell

The latest hail report in and around Rockwell is from September 21, 2016, 1.00 in (quarter size). There has been no hail report here in the five years since November 3, 2021.

Over the 20 years 2006–2025, Rockwell logged 5 reports on 5 hail days, about 0.3 reports a year. That is 44% less than the median Iowa town on this site (0.5 a year) and ranks #381 of 483 Iowa cities and towns on this site for all-time reports. Rockwell accounts for 7% of the 184 reports filed in Cerro Gordo County.

17% of reports with a size were 2 inches (hen egg) or larger, against 6% for the median Iowa town on this site. The largest hail on record here is 2.75 in (baseball) on July 31, 2003 near Rockwell.

The busiest year was 2003, with 5 reports on 2 days. Hail here peaks in July (42% of reports); 33% fall between April and June.

Reports a year 2006–2025 average

  • Rockwell 0.3
  • Cerro Gordo County 5.1
  • Median Iowa town on this site 0.5

Hail days 2006–2025

  • Rockwell 5
  • Cerro Gordo County 47
  • Median Iowa town on this site 7

Share 2 in or larger of sized reports

  • Rockwell 17%
  • Cerro Gordo County 2%
  • Median Iowa town on this site 6%

Hail over time

0246 1986: 1 reports, largest 0.75 in 1990 2000 2003: 5 reports, largest 2.75 in 2004: 1 reports, largest 0.75 in 2006: 1 reports, largest 1.00 in 2008: 1 reports, largest 1.75 in 2010: 2 reports, largest 1.00 in 2010 2016: 1 reports, largest 1.00 in 2020
Reports per year, 1986–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
0246 Jan Feb Mar April: 1 reports (8%) Apr May: 2 reports (17%) May June: 1 reports (8%) Jun July: 5 reports (42%) Jul Aug September: 3 reports (25%) Sep Oct Nov Dec
All 12 reports by calendar month.
Reports per month, 2017–2026. Darker cells had more reports.
YearJanFebMarAprMayJunJulAugSepOctNovDecTotal
2026 0
2025 0
2024 0
2023 0
2022 0
2021 0
2020 0
2019 0
2018 0
2017 0

Largest hail on record

Largest hail reports in Rockwell
Date Size Location County Damage Time · source
Jul 31, 2003 2.75 inbaseball Rockwell Cerro Gordo $25K 22:00 local · NCEI
Jul 31, 2003 2.50 intennis ball Rockwell Cerro Gordo $50K 21:58 local · NCEI
May 25, 2008 1.75 ingolf ball 0.51 W Rockwell Cerro Gordo $10K 15:25 local · NCEI
Jul 31, 2003 1.75 ingolf ball Rockwell Cerro Gordo $20K 22:00 local · NCEI
Jul 31, 2003 1.75 ingolf ball Rockwell Cerro Gordo $20K 21:55 local · NCEI

Size of every report

Most recent reports

Most recent hail reports in Rockwell
Date Size Location County Damage Time · source
Sep 21, 2016 1.00 inquarter 2.45 SW Cartersville Cerro Gordo — 14:32 local · NCEI
Jun 18, 2010 0.88 innickel 0.86 NW Rockwell Cerro Gordo $1K 08:20 local · NCEI
Apr 29, 2010 1.00 inquarter 0.51 W Rockwell Cerro Gordo $3K 20:12 local · NCEI
May 25, 2008 1.75 ingolf ball 0.51 W Rockwell Cerro Gordo $10K 15:25 local · NCEI
Sep 8, 2006 1.00 inquarter 11 SE Mason City Arpt Cerro Gordo $2K 15:58 local · NCEI
May 8, 2004 0.75 inpenny 10 S Mason City Cerro Gordo — 02:50 local · NCEI
Jul 31, 2003 1.75 ingolf ball Rockwell Cerro Gordo $20K 22:00 local · NCEI
Jul 31, 2003 2.75 inbaseball Rockwell Cerro Gordo $25K 22:00 local · NCEI
Jul 31, 2003 2.50 intennis ball Rockwell Cerro Gordo $50K 21:58 local · NCEI
Jul 31, 2003 1.75 ingolf ball Rockwell Cerro Gordo $20K 21:55 local · NCEI
Jul 7, 2003 1.75 ingolf ball Rockwell Cerro Gordo $10K 00:47 local · NCEI
Sep 28, 1986 0.75 inpenny — Cerro Gordo — 18:43 local · NCEI

Hail history near Rockwell

Questions about hail in Rockwell

How often does it hail in Rockwell, Iowa?

12 hail reports have been logged in and within about 5 km (3 miles) of Rockwell since 1986. Over the 20 years 2006–2025 that averages 0.3 reports a year. That ranks #381 of 483 Iowa places by number of reports.

When is hail season in Rockwell?

Most reports come in July, September, May. July alone accounts for 42% of all reports.

What is the largest hail recorded in Rockwell?

2.75 in (baseball size) on July 31, 2003 near Rockwell. 17% of reports here were 2 inches or larger.

When did it last hail in Rockwell?

The most recent report in this data is from September 21, 2016 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.

How many hail storms has Rockwell had in the last five years?

None: there has been no hail report in and within about 5 km (3 miles) of Rockwell since November 3, 2021. The last one was on September 21, 2016.

Where does this hail data come from?

Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.