Hail History

Hail history for St. Marys, Iowa

NOAA hail reports in and within about 5 km (3 miles) of St. Marys since 1979, with preliminary reports to November 3, 2026.

Readout · St. Marys

Last hail
May 12, 2018
1.00 in, quarter size
Hail days, last 5 years
0
since Nov 3, 2021 · 0 reports
Largest ever
1.75 in
golf ball · Sep 20, 2001

13 reports on 12 days since 1979 · #337 of 483 Iowa places

Hail map · St. Marys

St. Marys Bevington Martensdale New Virginia Truro Indianola Norwalk Cumming 10 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
13 most recent reports with a location; Warren County is shaded. Open street map

For homeowners

Roof damage after hail? Get a free inspection

Hail bruises shingles and cracks seals in ways you can't see from the ground, and most insurers set a claim deadline after the storm. The latest hail report in St. Marys is from May 12, 2018. A local roofer can check and document it at no cost.

Phone line opening soon

What would a claim cost you? Try the hail claim calculator

Preview: this form is not connected yet. Nothing you enter is sent or stored.

Roofer? Get hail alerts for your area with StormScope

What the record says about St. Marys

The latest hail report in and around St. Marys is from May 12, 2018, 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, St. Marys logged 8 reports on 7 hail days, about 0.4 reports a year. That is 11% less than the median Iowa town on this site (0.5 a year) and ranks #337 of 483 Iowa cities and towns on this site for all-time reports. St. Marys accounts for 4% of the 342 reports filed in Warren County.

0% 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 1.75 in (golf ball) on September 20, 2001 near St Marys.

Reports were down 86% in 2016–2025 (1) compared with 2006–2015 (7). The busiest year was 2001, with 3 reports on 3 days. Hail here peaks in June (46% of reports); 85% fall between April and June.

Reports a year 2006–2025 average

  • St. Marys 0.4
  • Warren County 10.2
  • Median Iowa town on this site 0.5

Hail days 2006–2025

  • St. Marys 7
  • Warren County 74
  • Median Iowa town on this site 7

Share 2 in or larger of sized reports

  • St. Marys 0%
  • Warren County 5%
  • Median Iowa town on this site 6%

Hail over time

0123 1979: 1 reports, largest 1.75 in 1980 1990 2000 2001: 3 reports, largest 1.75 in 2005: 1 reports, largest 0.75 in 2007: 1 reports, largest 0.88 in 2008: 1 reports, largest 1.00 in 2010: 1 reports, largest 0.88 in 2010 2012: 1 reports, largest 0.88 in 2013: 1 reports, largest 0.88 in 2015: 2 reports, largest 1.00 in 2018: 1 reports, largest 1.00 in 2020
Reports per year, 1979–2026. 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: 4 reports (31%) May June: 6 reports (46%) Jun Jul Aug September: 1 reports (8%) Sep October: 1 reports (8%) Oct Nov Dec
All 13 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 1 1
2017 0

Largest hail on record

Largest hail reports in St. Marys
Date Size Location County Damage Time · source
Sep 20, 2001 1.75 ingolf ball St Marys Warren $10K 15:17 local · NCEI
May 13, 2001 1.75 ingolf ball St Marys Warren $25K 11:05 local · NCEI
Oct 21, 1979 1.75 ingolf ball — Warren — 18:40 local · NCEI
May 12, 2018 1.00 inquarter 0.69 S St Marys Warren — 02:35 local · NCEI
Jun 10, 2015 1.00 inquarter 0.69 S St Marys Warren — 18:37 local · NCEI

Sizes filed before 1996 are often rough estimates (round numbers like 7.00 or 8.00 in) without an exact spot; they are shown as NOAA filed them.

Size of every report

Most recent reports

Most recent hail reports in St. Marys
Date Size Location County Damage Time · source
May 12, 2018 1.00 inquarter 0.69 S St Marys Warren — 02:35 local · NCEI
Jun 10, 2015 1.00 inquarter 0.69 S St Marys Warren — 18:37 local · NCEI
Jun 10, 2015 0.88 innickel 0.69 S St Marys Warren — 18:35 local · NCEI
Jun 14, 2013 0.88 innickel 2.07 S St Marys Warren — 22:03 local · NCEI
Apr 14, 2012 0.88 innickel 1.48 SSW St Marys Warren — 18:00 local · NCEI
Jun 18, 2010 0.88 innickel 0.69 S St Marys Warren — 16:27 local · NCEI
Jun 4, 2008 1.00 inquarter 2.32 SSW St Marys Warren $3K 22:04 local · NCEI
Jun 21, 2007 0.88 innickel 3.46 S St Marys Warren $2K 16:40 local · NCEI
May 10, 2005 0.75 inpenny 1 SW St Marys Warren — 23:23 local · NCEI
Sep 20, 2001 1.75 ingolf ball St Marys Warren $10K 15:17 local · NCEI
May 13, 2001 1.75 ingolf ball St Marys Warren $25K 11:05 local · NCEI
May 10, 2001 1.00 inquarter 3 NW Sully Jasper $5K 18:29 local · NCEI

Hail history near St. Marys

Questions about hail in St. Marys

How often does it hail in St. Marys, Iowa?

13 hail reports have been logged in and within about 5 km (3 miles) of St. Marys since 1979. Over the 20 years 2006–2025 that averages 0.4 reports a year. That ranks #337 of 483 Iowa places by number of reports.

When is hail season in St. Marys?

Most reports come in June, May, April. June alone accounts for 46% of all reports.

What is the largest hail recorded in St. Marys?

1.75 in (golf ball size) on September 20, 2001 near St Marys. 0% of reports here were 2 inches or larger.

When did it last hail in St. Marys?

The most recent report in this data is from May 12, 2018 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.

How many hail storms has St. Marys had in the last five years?

None: there has been no hail report in and within about 5 km (3 miles) of St. Marys since November 3, 2021. The last one was on May 12, 2018.

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.