Hail and tornadoes in Brown County, SD

Since December 2020, radar estimated hail somewhere in Brown County, SD on 63 days. The biggest estimate: 3 in or larger (teacup), on Fri, Jul 24, 2026. Hail was reported to the National Weather Service inside the county on 22 days.

Still loading: radar estimates go back to Wed, Oct 14, 2020, and the earlier years are being added.

Days with hail

since December 2020

1 inch or larger

days, estimated or reported

Largest radar estimate

3+ in

Fri, Jul 24, 2026

Largest reported

2.75 in

Sun, Jun 2, 2024

Radar estimates are NOAA's MESH: the largest hail the radar estimates aloft, on cells about 0.7 mile across, shown as the lower bound of a size band (“1.5+”). They often run larger than what reached the ground, and they aren't evidence of damage at any address.

Radar-estimated hail on Fri, Jul 24, 2026 around the place, with the hail reported that day — Fri, Jul 24, 2026: radar-estimated hail around Brown County, SD, with the hail reported that day.

Hail on record since 1955

NOAA's Storm Events database lists 330 hail reports in Brown County, SD on 133 days, 24 of them 2 inches or larger. The largest: 4.5 in, near Barnard, on Sun, Jun 23, 2002.

By decade: 1990s: 25 · 2000s: 118 · 2010s: 126 · 2020s: 61

Tornadoes since 1950

34 tornadoes have touched Brown County, SD since 1950, 3 of them rated F3/EF3 or stronger. They killed 0 and injured 1.

Strongest

Sun, Jun 23, 2002 · F4 · 9 mi long, 900 yd wide · near Barnard
Sun, Jun 23, 2002 · F3 · 10 mi long, 900 yd wide · near Barnard
Fri, May 31, 1996 · F3 · 27 mi long, 400 yd wide · near Aberdeen · 1 injury
Sat, May 22, 2010 · EF2 · 1.29 mi long, 100 yd wide · near Houghton
Tue, Jun 7, 2005 · F1 · 0.1 mi long, 30 yd wide · near Frederick

Most recent

Sun, Jul 13, 2025 · EF0 · 0.1 mi long, 10 yd wide · near Nahon
Sat, May 7, 2022 · EF0 · 0.01 mi long, 10 yd wide · near Columbia
Sat, May 7, 2022 · EF0 · 0.01 mi long, 10 yd wide · near Aberdeen
Sat, May 7, 2022 · EF0 · 0.01 mi long, 10 yd wide · near Rudolph
Sun, Jun 7, 2020 · EF0 · 5.35 mi long, 50 yd wide · near Frederick
Tue, Jun 13, 2017 · EF0 · 0.1 mi long, 10 yd wide · near Groton
Fri, Jun 1, 2012 · EF0 · 0.48 mi long, 10 yd wide · near Columbia
Sat, May 22, 2010 · EF2 · 1.29 mi long, 100 yd wide · near Houghton
Sat, May 22, 2010 · EF0 · 1.6 mi long, 50 yd wide · near Barnard
Thu, Aug 14, 2008 · EF0 · 0.15 mi long, 10 yd wide · near Aberdeen

By decade: 1990s: 10 · 2000s: 15 · 2010s: 4 · 2020s: 5

Still loading: NOAA's record goes back to 1950, and 1995 onward is in so far.

Every hail day since December 2020

Sat, Aug 29, 2026
Radar estimate anywhere in the county: 2 in or larger (hen egg)
No hail reported in the county.
Mon, Aug 24, 2026
Radar estimate anywhere in the county: 2 in or larger (hen egg)
No hail reported in the county.
Sun, Aug 2, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Fri, Jul 24, 2026
Radar estimate anywhere in the county: 3 in or larger (teacup)
Reported in the county
- 2 in (3 SSE Westport, SD)
- 1 in (0.5 N Westport, SD)
- 1 in (2 N Westport, SD)
- 1 in (2 NNW Westport, SD)
- 1.75 in (3 NW Westport, SD)
Tue, Jul 7, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Tue, Jun 30, 2026
Reported in the county
- 1 in (Groton, SD)
Mon, Jun 29, 2026
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county
- 1 in (Groton, SD)
Sat, Jun 27, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Tue, Jun 9, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Wed, Jun 3, 2026
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
Sun, May 31, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Tue, Jan 20, 2026
Radar estimate anywhere in the county: 3 in or larger (teacup)
No hail reported in the county.
Sun, Aug 17, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Fri, Aug 15, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Thu, Aug 14, 2025
Radar estimate anywhere in the county: 2 in or larger (hen egg)
No hail reported in the county.
Wed, Aug 13, 2025
Radar estimate anywhere in the county: 2 in or larger (hen egg)
No hail reported in the county.
Tue, Aug 5, 2025
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county
- 1.5 in (2 NE Elm Lake, SD)
Mon, Jul 28, 2025
Radar estimate anywhere in the county: 2 in or larger (hen egg)
No hail reported in the county.
Sat, Jul 26, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Tue, Jul 22, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sun, Jul 20, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Tue, Jul 15, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Mon, Jul 14, 2025
Radar estimate anywhere in the county: 2 in or larger (hen egg)
No hail reported in the county.
Fri, Jul 4, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sat, Jun 21, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Thu, Jun 19, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sun, Jun 15, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Thu, Jun 12, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Wed, Jul 31, 2024
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county
- 1 in (5 N Groton, SD)
Tue, Jul 9, 2024
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county
- 1.25 in (2 E Frederick, SD)
Sat, Jul 6, 2024
Radar estimate anywhere in the county: 2 in or larger (hen egg)
Reported in the county
- 1 in (Groton, SD)
Sat, Jun 22, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sun, Jun 2, 2024
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county
- 1.5 in (4 S Sand Lake Wildlife, SD)
- 1.75 in (4 W Sand Lake Wildlife, SD)
- 2.75 in (3 NNW Barnard, SD)
- 1.25 in (5.5 W Barnard, SD)
- 1 in (2 SSE Claremont, SD)
Thu, May 23, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1 in (2 WSW Aberdeen, SD)
- 1.25 in (Elm Lake, SD)
Fri, Sep 29, 2023
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
Thu, Sep 28, 2023
Radar estimate anywhere in the county: 2 in or larger (hen egg)
Reported in the county
- 1.5 in (1 W Groton, SD)
- 1 in (1 N Stratford, SD)
Thu, Sep 21, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Thu, Aug 10, 2023
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1.75 in (3 ESE Warner, SD)
Wed, Aug 9, 2023
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Wed, Jul 26, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Thu, Jun 8, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Thu, Jun 1, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Tue, May 9, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Thu, Aug 18, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1 in (5 W GROTON, SD)
Fri, Aug 5, 2022
Radar estimate anywhere in the county: 2 in or larger (hen egg)
Reported in the county
- 1.25 in (GROTON, SD)
- 1.5 in (1 S WARNER, SD)
Sat, Jul 23, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Fri, Jul 22, 2022
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county
- 1 in (4 SE FERNEY, SD)
Thu, Jul 21, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1 in (3 W FREDERICK, SD)
- 1 in (HECLA, SD)
Mon, Jul 18, 2022
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sun, Jul 3, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Mon, Jun 13, 2022
Radar estimate anywhere in the county: 2 in or larger (hen egg)
Reported in the county
- 1.75 in (4 NE ELM LAKE, SD)
Thu, May 12, 2022
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Fri, Apr 22, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1 in (3 N CLAREMONT, SD)
Sat, Aug 28, 2021
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county
- 1 in (4 NNW HOUGHTON, SD)
Fri, Aug 27, 2021
Radar estimate anywhere in the county: 3 in or larger (teacup)
Reported in the county
- 1.75 in (WARNER, SD)
Mon, Aug 23, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sun, Aug 22, 2021
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county
- 1 in (RICHMOND LAKE REC AREA, SD)
- 1.25 in (WARNER, SD)
Sat, Aug 14, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sat, Aug 7, 2021
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county
- 1 in (6 ENE WETONKA, SD)
- 1.5 in (9 NW FREDERICK, SD)
Mon, Jul 26, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sun, Jul 25, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Fri, Jul 23, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Thu, Jun 10, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1 in (2 SSE CLAREMONT, SD)
Thu, Jan 7, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.

Check your own address →Weather in Brown County, SD now →Get warned before the next storm →

Radar estimates and reports are for anywhere inside the county's boundary. Radar estimates come from NOAA's MRMS estimated hail size (MESH), the largest hail the radar estimates aloft on a ~1 km grid. They often run larger than the hail that reached the ground, and they aren't an observation at any address. Reports are what people reported to the National Weather Service. Neither is proof of damage or an official record for an insurance claim. From NOAA's Storm Events Database (NCEI), which records tornadoes from 1950, hail and thunderstorm wind from 1955, and every kind of storm from 1996. A tornado that crossed county lines is counted in each county it touched. Recent months are added as NCEI publishes them, a few months behind. Damage is in the dollars of its year and is often an estimate.