Hail History

Hail history for Merrill, Iowa

NOAA hail reports in and within about 5 km (3 miles) of Merrill since 2001, with preliminary reports to November 3, 2026.

Readout · Merrill

Last hail
Apr 19, 2023
1.00 in, quarter size
Hail days, last 5 years
1
since Nov 3, 2021 · 1 report
Largest ever
2.50 in
tennis ball · May 19, 2004

10 reports on 8 days since 2001 · #467 of 483 Iowa places

Hail map · Merrill

Merrill Le Mars Brunsville Hinton Oyens Remsen Kingsley Akron 10 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
10 most recent reports with a location; Plymouth 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 Merrill is from April 19, 2023. A local roofer can check and document it at no cost.

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What the record says about Merrill

The latest hail report in and around Merrill is from April 19, 2023, 1.00 in (quarter size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 1.00 in on April 19, 2023.

Over the 20 years 2006–2025, Merrill logged 3 reports on 3 hail days, about 0.1 reports a year. That is 33% of the median Iowa town on this site (0.5 a year) and ranks #467 of 483 Iowa cities and towns on this site for all-time reports. Merrill accounts for 3% of the 287 reports filed in Plymouth County.

10% 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 2.50 in (tennis ball) on May 19, 2004 near Le Mars.

The busiest year was 2004, with 4 reports on 2 days. Hail here peaks in May (40% of reports); 70% fall between April and June.

Reports a year 2006–2025 average

  • Merrill 0.1
  • Plymouth County 6.4
  • Median Iowa town on this site 0.5

Hail days 2006–2025

  • Merrill 3
  • Plymouth County 71
  • Median Iowa town on this site 7

Share 2 in or larger of sized reports

  • Merrill 10%
  • Plymouth County 7%
  • Median Iowa town on this site 6%

Hail over time

01234 2001: 1 reports, largest 0.75 in 2004: 4 reports, largest 2.50 in 2005: 2 reports, largest 0.88 in 2005 2010 2011: 1 reports, largest 0.88 in 2015 2020: 1 reports, largest 1.00 in 2020 2023: 1 reports, largest 1.00 in 2025
Reports per year, 2001–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
01234 Jan Feb Mar April: 2 reports (20%) Apr May: 4 reports (40%) May June: 1 reports (10%) Jun Jul August: 2 reports (20%) Aug September: 1 reports (10%) Sep Oct Nov Dec
All 10 reports by calendar month.
Reports per month, 2017–2026. Darker cells had more reports.
YearJanFebMarAprMayJunJulAugSepOctNovDecTotal
2026 0
2025 0
2024 0
2023 1 1
2022 0
2021 0
2020 1 1
2019 0
2018 0
2017 0

Hail days since Nov 3, 2021

DateReportsLargestStorm page
Apr 19, 2023 1 1.00 in —

Largest hail on record

Largest hail reports in Merrill
Date Size Location County Time · source
May 19, 2004 2.50 intennis ball Le Mars Plymouth 14:15 local · NCEI
May 19, 2004 1.75 ingolf ball Merrill Plymouth 13:53 local · NCEI
Apr 19, 2023 1.00 inquarter Merrill Plymouth 19:39 local · NCEI
Aug 31, 2020 1.00 inquarter Merrill Plymouth 03:37 local · NCEI
Apr 9, 2011 0.88 innickel Merrill Plymouth 21:07 local · NCEI

Size of every report

Most recent reports

Most recent hail reports in Merrill
Date Size Location County Time · source
Apr 19, 2023 1.00 inquarter Merrill Plymouth 19:39 local · NCEI
Aug 31, 2020 1.00 inquarter Merrill Plymouth 03:37 local · NCEI
Apr 9, 2011 0.88 innickel Merrill Plymouth 21:07 local · NCEI
Sep 18, 2005 0.88 innickel Merrill Plymouth 21:55 local · NCEI
May 8, 2005 0.75 inpenny Merrill Plymouth 18:41 local · NCEI
Aug 29, 2004 0.88 innickel 5 SW Le Mars Plymouth 17:53 local · NCEI
May 19, 2004 2.50 intennis ball Le Mars Plymouth 14:15 local · NCEI
May 19, 2004 0.75 inpenny Merrill Plymouth 13:55 local · NCEI
May 19, 2004 1.75 ingolf ball Merrill Plymouth 13:53 local · NCEI
Jun 13, 2001 0.75 inpenny Merrill Plymouth 18:14 local · NCEI

Hail history near Merrill

Questions about hail in Merrill

How often does it hail in Merrill, Iowa?

10 hail reports have been logged in and within about 5 km (3 miles) of Merrill since 2001. Over the 20 years 2006–2025 that averages 0.1 reports a year. That ranks #467 of 483 Iowa places by number of reports.

When is hail season in Merrill?

Most reports come in May, April, August. May alone accounts for 40% of all reports.

What is the largest hail recorded in Merrill?

2.50 in (tennis ball size) on May 19, 2004 near Le Mars. 10% of reports here were 2 inches or larger.

When did it last hail in Merrill?

The most recent report in this data is from April 19, 2023 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.

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

1 separate days with hail reports since November 3, 2021, adding up to 1 reports. The most recent was April 19, 2023.

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.