Hail History

Hail history for Mount Vernon, South Dakota

NOAA hail reports in and within about 5 km (3 miles) of Mount Vernon since 2002, with preliminary reports to November 3, 2026.

Readout · Mount Vernon

Last hail
Jul 11, 2017
1.00 in, quarter size
Hail days, last 5 years
0
since Nov 3, 2021 · 0 reports
Largest ever
2.50 in
tennis ball · Jul 9, 2009

16 reports on 10 days since 2002 · #176 of 305 South Dakota places

Hail map · Mount Vernon

Mount Vernon Loomis Mitchell Plankinton Stickney Ethan 10 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
16 most recent reports with a location; Davison County is shaded. Open street map

For homeowners

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What the record says about Mount Vernon

The latest hail report in and around Mount Vernon is from July 11, 2017, 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, Mount Vernon logged 11 reports on 7 hail days, about 0.6 reports a year. That is 22% more than the median South Dakota town on this site (0.5 a year) and ranks #176 of 305 South Dakota cities and towns on this site for all-time reports. Mount Vernon accounts for 10% of the 168 reports filed in Davison County.

13% 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 2.50 in (tennis ball) on July 9, 2009 near 0.85 SW Mt Vernon.

Reports were down 63% in 2016–2025 (3) compared with 2006–2015 (8). The busiest year was 2009, with 5 reports on 2 days. Hail here peaks in June (50% of reports); 56% fall between April and June.

Reports a year 2006–2025 average

  • Mount Vernon 0.6
  • Davison County 4.6
  • Median South Dakota town on this site 0.5

Hail days 2006–2025

  • Mount Vernon 7
  • Davison County 45
  • Median South Dakota town on this site 7

Share 2 in or larger of sized reports

  • Mount Vernon 13%
  • Davison County 6%
  • Median South Dakota town on this site 7%

Hail over time

0246 2002: 2 reports, largest 0.88 in 2003: 2 reports, largest 1.00 in 2005: 1 reports, largest 2.50 in 2005 2007: 1 reports, largest 1.00 in 2009: 5 reports, largest 2.50 in 2010 2011: 1 reports, largest 1.75 in 2012: 1 reports, largest 1.75 in 2015 2017: 3 reports, largest 1.00 in 2020 2025
Reports per year, 2002–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
02468 Jan Feb Mar Apr May: 1 reports (6%) May June: 8 reports (50%) Jun July: 3 reports (19%) Jul August: 3 reports (19%) Aug September: 1 reports (6%) Sep Oct Nov Dec
All 16 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 21 3

Largest hail on record

Largest hail reports in Mount Vernon
Date Size Location County Time · source
Jul 9, 2009 2.50 intennis ball 0.85 SW Mt Vernon Davison 04:04 local · NCEI
Aug 3, 2005 2.50 intennis ball Mt Vernon Davison 16:31 local · NCEI
May 5, 2012 1.75 ingolf ball 11.01 E Plankinton Davison 07:20 local · NCEI
Jun 13, 2011 1.75 ingolf ball 3.08 WSW Mt Vernon Davison 13:23 local · NCEI
Jul 9, 2009 1.75 ingolf ball 0.85 SW Mt Vernon Davison 03:51 local · NCEI

Size of every report

Most recent reports

Most recent hail reports in Mount Vernon
Date Size Location County Time · source
Jul 11, 2017 1.00 inquarter 0.85 SW Mt Vernon Davison 19:23 local · NCEI
Jun 13, 2017 1.00 inquarter 2.94 SSW Mt Vernon Davison 17:23 local · NCEI
Jun 13, 2017 0.75 inpenny 1.5 W Mt Vernon Davison 17:06 local · NCEI
May 5, 2012 1.75 ingolf ball 11.01 E Plankinton Davison 07:20 local · NCEI
Jun 13, 2011 1.75 ingolf ball 3.08 WSW Mt Vernon Davison 13:23 local · NCEI
Jul 9, 2009 2.50 intennis ball 0.85 SW Mt Vernon Davison 04:04 local · NCEI
Jul 9, 2009 1.75 ingolf ball 0.85 SW Mt Vernon Davison 03:51 local · NCEI
Jun 16, 2009 1.75 ingolf ball 0.85 SW Mt Vernon Davison 16:30 local · NCEI
Jun 16, 2009 1.75 ingolf ball 3.45 S Mt Vernon Davison 16:24 local · NCEI
Jun 16, 2009 0.88 innickel 3.56 W Mt Vernon Davison 16:00 local · NCEI
Sep 29, 2007 1.00 inquarter 1 S Mt Vernon Davison 22:00 local · NCEI
Aug 3, 2005 2.50 intennis ball Mt Vernon Davison 16:31 local · NCEI

Hail history near Mount Vernon

Questions about hail in Mount Vernon

How often does it hail in Mount Vernon, South Dakota?

16 hail reports have been logged in and within about 5 km (3 miles) of Mount Vernon since 2002. Over the 20 years 2006–2025 that averages 0.6 reports a year. That ranks #176 of 305 South Dakota places by number of reports.

When is hail season in Mount Vernon?

Most reports come in June, July, August. June alone accounts for 50% of all reports.

What is the largest hail recorded in Mount Vernon?

2.50 in (tennis ball size) on July 9, 2009 near 0.85 SW Mt Vernon. 13% of reports here were 2 inches or larger.

When did it last hail in Mount Vernon?

The most recent report in this data is from July 11, 2017 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.

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

None: there has been no hail report in and within about 5 km (3 miles) of Mount Vernon since November 3, 2021. The last one was on July 11, 2017.

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.