Hail History

Hail history for Westport, South Dakota

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

Readout · Westport

Last hail
Jul 24, 2026
2.00 in, hen egg size
Hail days, last 5 years
1
since Nov 3, 2021 · 5 reports
Largest ever
4.25 in
grapefruit · Jul 17, 2010

20 reports on 13 days since 1986 · #127 of 305 South Dakota places

Hail map · Westport

Westport Columbia Aberdeen Frederick Bath Mina Leola Warner Groton 10 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
20 most recent reports with a location; Brown County is shaded. Open street map

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What the record says about Westport

The latest hail report in and around Westport is from July 24, 2026, 2.00 in (hen egg size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 2.00 in on July 24, 2026.

Over the 20 years 2006–2025, Westport logged 8 reports on 7 hail days, about 0.4 reports a year. That is 11% less than the median South Dakota town on this site (0.5 a year) and ranks #127 of 305 South Dakota cities and towns on this site for all-time reports. Westport accounts for 4% of the 445 reports filed in Brown County.

15% of reports with a size were 2 inches (hen egg) or larger, against 7% for the median South Dakota town on this site. The largest hail on record here is 4.25 in (grapefruit) on July 17, 2010 near Westport.

Reports were down 67% in 2016–2025 (2) compared with 2006–2015 (6). The busiest year was 2026, with 5 reports on 1 day. Hail here peaks in July (35% of reports); 45% fall between April and June.

Reports a year 2006–2025 average

  • Westport 0.4
  • Brown County 11.4
  • Median South Dakota town on this site 0.5

Hail days 2006–2025

  • Westport 7
  • Brown County 84
  • Median South Dakota town on this site 7

Share 2 in or larger of sized reports

  • Westport 15%
  • Brown County 7%
  • Median South Dakota town on this site 7%

Hail over time

0246 1986: 2 reports, largest 1.75 in 1990 2000 2001: 2 reports, largest 1.00 in 2003: 2 reports, largest 2.50 in 2004: 1 reports, largest 0.75 in 2007: 2 reports, largest 1.75 in 2008: 1 reports, largest 0.75 in 2009: 1 reports, largest 1.00 in 2010: 1 reports, largest 4.25 in 2010 2012: 1 reports, largest 1.00 in 2017: 1 reports, largest 1.00 in 2020: 1 reports, largest 1.00 in 2020 2026: 5 reports, largest 2.00 in
Reports per year, 1986–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
02468 Jan Feb Mar April: 3 reports (15%) Apr May: 2 reports (10%) May June: 4 reports (20%) Jun July: 7 reports (35%) Jul August: 3 reports (15%) Aug September: 1 reports (5%) Sep Oct Nov Dec
All 20 reports by calendar month.
Reports per month, 2017–2026. Darker cells had more reports.
YearJanFebMarAprMayJunJulAugSepOctNovDecTotal
2026 5 5
2025 0
2024 0
2023 0
2022 0
2021 0
2020 1 1
2019 0
2018 0
2017 1 1

Hail days since Nov 3, 2021

DateReportsLargestStorm page
Jul 24, 2026 5 2.00 in —

Largest hail on record

Largest hail reports in Westport
Date Size Location County Time · source
Jul 17, 2010 4.25 ingrapefruit Westport Brown 14:46 local · NCEI
Aug 25, 2003 2.50 intennis ball 10 N Aberdeen Brown 18:25 local · NCEI
Jul 24, 2026 2.00 inhen egg 2.93 SSE Westport Brown 20:39 local · NCEI
Jul 24, 2026 1.75 ingolf ball 2.53 NW Westport Brown 20:25 local · NCEI
Apr 20, 2007 1.75 ingolf ball 2.9 E Westport Brown 17:50 local · NCEI

Size of every report

Most recent reports

Most recent hail reports in Westport
Date Size Location County Time · source
Jul 24, 2026 2.00 inhen egg 2.93 SSE Westport Brown 20:39 local · NCEI
Jul 24, 2026 1.00 inquarter 0.69 N Westport Brown 20:31 local · NCEI
Jul 24, 2026 1.00 inquarter 2.07 N Westport Brown 20:25 local · NCEI
Jul 24, 2026 1.75 ingolf ball 2.53 NW Westport Brown 20:25 local · NCEI
Jul 24, 2026 1.00 inquarter 2.29 NNW Westport Brown 19:21 local · NCEI
Apr 6, 2020 1.00 inquarter 2.29 NNW Westport Brown 19:50 local · NCEI
Sep 19, 2017 1.00 inquarter 2.53 NW Westport Brown 18:17 local · NCEI
Jun 1, 2012 1.00 inquarter 2.83 SW Westport Brown 16:00 local · NCEI
Jul 17, 2010 4.25 ingrapefruit Westport Brown 14:46 local · NCEI
Jun 24, 2009 1.00 inquarter Westport Brown 18:20 local · NCEI
May 24, 2008 0.75 inpenny 2.93 SSE Westport Brown 18:20 local · NCEI
Apr 20, 2007 1.75 ingolf ball 2.9 E Westport Brown 17:50 local · NCEI

Hail history near Westport

Questions about hail in Westport

How often does it hail in Westport, South Dakota?

20 hail reports have been logged in and within about 5 km (3 miles) of Westport since 1986. Over the 20 years 2006–2025 that averages 0.4 reports a year. That ranks #127 of 305 South Dakota places by number of reports.

When is hail season in Westport?

Most reports come in July, June, April. July alone accounts for 35% of all reports.

What is the largest hail recorded in Westport?

4.25 in (grapefruit size) on July 17, 2010 near Westport. 15% of reports here were 2 inches or larger.

When did it last hail in Westport?

The most recent report in this data is from July 24, 2026 (2.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.

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

1 separate days with hail reports since November 3, 2021, adding up to 5 reports. The most recent was July 24, 2026.

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.