Hail History

Hail history for Isabel, South Dakota

NOAA hail reports in and within about 5 km (3 miles) of Isabel since 1971, with preliminary reports to November 3, 2026.

Readout · Isabel

Last hail
Sep 19, 2021
1.25 in, half dollar size
Hail days, last 5 years
0
since Nov 3, 2021 · 0 reports
Largest ever
2.50 in
tennis ball · Jul 22, 2016

35 reports on 26 days since 1971 · #35 of 305 South Dakota places

Hail map · Isabel

Isabel Timber Lake Dupree North Eagle Butte Eagle Butte 20 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
35 most recent reports with a location; Dewey County is shaded. Open street map

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What the record says about Isabel

The latest hail report in and around Isabel is from September 19, 2021, 1.25 in (half dollar size). There has been no hail report here in the five years since November 3, 2021.

Over the 20 years 2006–2025, Isabel logged 13 reports on 9 hail days, about 0.7 reports a year. That is 44% more than the median South Dakota town on this site (0.5 a year) and ranks #35 of 305 South Dakota cities and towns on this site for all-time reports. Isabel accounts for 13% of the 266 reports filed in Dewey County.

6% 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 22, 2016 near 1.38 N Isabel.

Reports were down 38% in 2016–2025 (5) compared with 2006–2015 (8). The busiest year was 2007, with 4 reports on 2 days. Hail here peaks in June (34% of reports); 46% fall between April and June.

Reports a year 2006–2025 average

  • Isabel 0.7
  • Dewey County 8.1
  • Median South Dakota town on this site 0.5

Hail days 2006–2025

  • Isabel 9
  • Dewey County 77
  • Median South Dakota town on this site 7

Share 2 in or larger of sized reports

  • Isabel 6%
  • Dewey County 8%
  • Median South Dakota town on this site 7%

Hail over time

01234 1971: 1 reports, largest 2.00 in 1979: 1 reports, largest 1.75 in 1980: 1 reports, largest 1.50 in 1980 1987: 2 reports, largest 0.75 in 1990: 1 reports, largest 1.00 in 1990 1991: 1 reports, largest 1.75 in 1996: 4 reports, largest 1.75 in 1998: 3 reports, largest 1.75 in 1999: 3 reports, largest 1.75 in 2000: 1 reports, largest 0.88 in 2000 2001: 1 reports, largest 0.88 in 2003: 1 reports, largest 0.88 in 2004: 2 reports, largest 1.75 in 2007: 4 reports, largest 0.88 in 2008: 1 reports, largest 0.88 in 2009: 1 reports, largest 0.75 in 2010 2011: 1 reports, largest 1.00 in 2013: 1 reports, largest 1.00 in 2016: 2 reports, largest 2.50 in 2018: 2 reports, largest 1.00 in 2020 2021: 1 reports, largest 1.25 in
Reports per year, 1971–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
051015 Jan Feb Mar Apr May: 4 reports (11%) May June: 12 reports (34%) Jun July: 10 reports (29%) Jul August: 7 reports (20%) Aug September: 2 reports (6%) Sep Oct Nov Dec
All 35 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 1 1
2020 0
2019 0
2018 2 2
2017 0

Largest hail on record

Largest hail reports in Isabel
Date Size Location County Time · source
Jul 22, 2016 2.50 intennis ball 1.38 N Isabel Dewey 14:58 local · NCEI
Jul 11, 1971 2.00 inhen egg — Dewey 03:00 local · NCEI
Aug 1, 2004 1.75 ingolf ball 2 N Isabel Dewey 18:55 local · NCEI
Aug 1, 2004 1.75 ingolf ball Isabel Dewey 18:55 local · NCEI
Jun 7, 1999 1.75 ingolf ball 13 E Glad Vly Ziebach 22:10 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 Isabel
Date Size Location County Time · source
Sep 19, 2021 1.25 inhalf dollar 0.69 N Isabel Dewey 20:10 local · NCEI
Jun 16, 2018 0.75 inpenny 0.84 NE Isabel Dewey 06:36 local · NCEI
Jun 16, 2018 1.00 inquarter 1.46 W Isabel Dewey 06:30 local · NCEI
Jul 22, 2016 1.50 inping pong ball 1.38 N Isabel Dewey 15:10 local · NCEI
Jul 22, 2016 2.50 intennis ball 1.38 N Isabel Dewey 14:58 local · NCEI
Aug 27, 2013 1.00 inquarter 1.61 ESE Isabel Dewey 21:00 local · NCEI
Jul 14, 2011 1.00 inquarter 1.38 N Isabel Dewey 20:30 local · NCEI
Jul 8, 2009 0.75 inpenny 1.38 N Isabel Dewey 19:26 local · NCEI
Jun 1, 2008 0.88 innickel 13 E Glad Valley Ziebach 19:40 local · NCEI
Jun 11, 2007 0.88 innickel 1.38 N Isabel Dewey 17:20 local · NCEI
Jun 11, 2007 0.88 innickel 1.38 N Isabel Dewey 16:20 local · NCEI
May 21, 2007 0.75 inpenny 2.53 ESE Isabel Dewey 18:18 local · NCEI

Hail history near Isabel

Questions about hail in Isabel

How often does it hail in Isabel, South Dakota?

35 hail reports have been logged in and within about 5 km (3 miles) of Isabel since 1971. Over the 20 years 2006–2025 that averages 0.7 reports a year. That ranks #35 of 305 South Dakota places by number of reports.

When is hail season in Isabel?

Most reports come in June, July, August. June alone accounts for 34% of all reports.

What is the largest hail recorded in Isabel?

2.50 in (tennis ball size) on July 22, 2016 near 1.38 N Isabel. 6% of reports here were 2 inches or larger.

When did it last hail in Isabel?

The most recent report in this data is from September 19, 2021 (1.25 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.

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

None: there has been no hail report in and within about 5 km (3 miles) of Isabel since November 3, 2021. The last one was on September 19, 2021.

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.