Hail and tornadoes in Lyon County, IA

Since October 2020, radar estimated hail somewhere in Lyon County, IA on 64 days. The biggest estimate: 3 in or larger (teacup), on Sat, Aug 28, 2021. Hail was reported to the National Weather Service inside the county on 9 days.

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

Days with hail

since October 2020

1 inch or larger

days, estimated or reported

Largest radar estimate

3+ in

Sat, Aug 28, 2021

Largest reported

4 in

Sat, Aug 28, 2021

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.

Hail on record since 1955

NOAA's Storm Events database lists 167 hail reports in Lyon County, IA on 88 days, 12 of them 2 inches or larger. The largest: 4 in, near Larchwood, on Sat, Aug 28, 2021.

By decade: 1990s: 10 · 2000s: 87 · 2010s: 45 · 2020s: 25

Tornadoes since 1950

24 tornadoes have touched Lyon County, IA since 1950, none of them rated F3/EF3 or stronger.

Strongest

Fri, Jun 25, 2010 · EF2 · 5.18 mi long, 450 yd wide · near Little Rock
Mon, Jul 28, 2025 · EF1 · 2.06 mi long, 250 yd wide · near Alvord
Tue, Apr 16, 2024 · EF1 · 0.99 mi long, 75 yd wide · near George
Mon, May 30, 2022 · EF1 · 1.94 mi long, 100 yd wide · near Rock Rapids Muni Arp
Sat, Aug 17, 2019 · EF1 · 6.95 mi long, 75 yd wide · near Loster

Most recent

Mon, Jul 28, 2025 · EFU · 0.21 mi long, 50 yd wide · near Lakewood
Mon, Jul 28, 2025 · EF1 · 2.06 mi long, 250 yd wide · near Alvord
Tue, Apr 16, 2024 · EF1 · 0.99 mi long, 75 yd wide · near George
Mon, May 30, 2022 · EF0 · 0.54 mi long, 60 yd wide · near Doon
Mon, May 30, 2022 · EF1 · 1.94 mi long, 100 yd wide · near Rock Rapids Muni Arp
Sat, Aug 17, 2019 · EF1 · 6.95 mi long, 75 yd wide · near Loster
Tue, Jun 17, 2014 · EF0 · 0.3 mi long, 50 yd wide · near George
Mon, Jun 16, 2014 · EF0 · 0.2 mi long, 50 yd wide · near Alvord
Fri, Jun 25, 2010 · EF1 · 1.22 mi long, 100 yd wide · near Little Rock
Fri, Jun 25, 2010 · EF2 · 5.18 mi long, 450 yd wide · near Little Rock

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

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

Every hail day since October 2020

Thu, Oct 8, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sun, Sep 6, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Fri, Sep 4, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Fri, Aug 28, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Mon, Aug 10, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Mon, Aug 3, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sat, Jul 4, 2026
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
Thu, Jul 2, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Wed, Jul 1, 2026
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
Tue, Jun 30, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Mon, Jun 29, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sat, Jun 27, 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: 0.75 in or larger (penny)
No hail reported in the county.
Sun, May 24, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sun, May 17, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1.25 in (3 NE Lester, IA)
Sun, Sep 14, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Mon, Sep 8, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Tue, Aug 5, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Tue, Jul 29, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Mon, Jul 28, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sun, Jul 27, 2025
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
Wed, Jul 23, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Fri, Jul 18, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
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.
Fri, Jul 11, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Wed, Jul 9, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sat, Jul 5, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sat, Jun 28, 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: 0.75 in or larger (penny)
No hail reported in the county.
Mon, Jun 2, 2025
Radar estimate anywhere in the county: 2 in or larger (hen egg)
Reported in the county
- 1 in (5 NE Doon, IA)
- 1.25 in (1 NNE Doon, IA)
Mon, Apr 28, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 2 in (4 W George, IA)
- 1 in (3 W Inwood, IA)
Thu, Apr 17, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Mon, Aug 26, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Mon, Jul 29, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sat, Jul 13, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Thu, Jul 4, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Thu, May 23, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Mon, Apr 15, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Mon, Oct 23, 2023
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Fri, Sep 15, 2023
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
Tue, Jul 25, 2023
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Thu, Jul 13, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Mon, Jul 10, 2023
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
Wed, May 31, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Wed, May 10, 2023
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Wed, Apr 19, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
Reported in the county
- 1.5 in (DOON, IA)
Tue, Jul 5, 2022
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
Sun, Jun 12, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Mon, May 30, 2022
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sun, May 29, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sat, May 28, 2022
Radar estimate anywhere in the county: 2 in or larger (hen egg)
Reported in the county
- 1.5 in (5 SSW LARCHWOOD, IA)
Wed, May 11, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Thu, Apr 21, 2022
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Mon, Apr 18, 2022
Radar estimate anywhere in the county: 2 in or larger (hen egg)
No hail reported in the county.
Mon, Aug 30, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sat, Aug 28, 2021
Radar estimate anywhere in the county: 3 in or larger (teacup)
Reported in the county
- 1 in (LARCHWOOD, IA)
- 4 in (LARCHWOOD, IA)
Thu, Aug 26, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1.75 in (2 ESE INWOOD, IA)
Tue, Aug 24, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1 in (LITTLE ROCK, IA)
Sun, Aug 22, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Fri, Aug 6, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Thu, Aug 5, 2021
Radar estimate anywhere in the county: 2 in or larger (hen egg)
No hail reported in the county.
Fri, Jul 30, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Mon, Jul 5, 2021
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
Mon, Apr 5, 2021
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county
- 1.25 in (1 SSW ROCK RAPIDS, IA)
- 1 in (1 E LARCHWOOD, IA)

Check your own address →Weather in Lyon County, IA 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.