Hail and tornadoes in Grundy County, IA

Since December 2020, radar estimated hail somewhere in Grundy County, IA on 72 days. The biggest estimate: 2 in or larger (hen egg), on Tue, Apr 14, 2026. Hail was reported to the National Weather Service inside the county on 6 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

2+ in

Tue, Apr 14, 2026

Largest reported

1.75 in

Tue, Apr 14, 2026

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 71 hail reports in Grundy County, IA on 44 days, 3 of them 2 inches or larger. The largest: 2.5 in, near Wellsburg, on Sun, Aug 9, 2009.

By decade: 1990s: 2 · 2000s: 42 · 2010s: 20 · 2020s: 7

Tornadoes since 1950

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

Strongest

Sun, May 25, 2008 · EF2 · 1.09 mi long, 75 yd wide · near Fern
Thu, May 10, 2001 · F2 · 1.7 mi long, 200 yd wide · near Conrad
Thu, May 10, 2001 · F2 · 4 mi long, 875 yd wide · near Beaman
Fri, Jul 2, 1999 · F2 · 8.5 mi long, 50 yd wide · near Stout
Fri, Mar 31, 2023 · EF1 · 3.53 mi long, 80 yd wide · near Wellsburg

Most recent

Mon, Aug 18, 2025 · EFU · 4.53 mi long, 50 yd wide · near Holland
Mon, Aug 18, 2025 · EFU · 0.62 mi long, 35 yd wide · near Fern
Mon, Aug 18, 2025 · EFU · 1.39 mi long, 50 yd wide · near Wellsburg
Fri, Mar 31, 2023 · EF1 · 3.53 mi long, 80 yd wide · near Wellsburg
Fri, Mar 31, 2023 · EF1 · 4.14 mi long, 80 yd wide · near Wellsburg
Mon, Nov 28, 2016 · EF0 · 1.47 mi long, 25 yd wide · near Grundy Center Airport
Mon, Nov 28, 2016 · EF0 · 2.59 mi long, 50 yd wide · near Fern
Sun, Aug 31, 2014 · EF0 · 1.66 mi long, 75 yd wide · near Wellsburg
Sun, Jul 6, 2014 · EF0 · 0.04 mi long, 20 yd wide · near Reinbeck
Sun, Jul 6, 2014 · EF1 · 3.21 mi long, 100 yd wide · near Reinbeck

By decade: 1990s: 1 · 2000s: 15 · 2010s: 6 · 2020s: 5

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

Every hail day since December 2020

Tue, Aug 11, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
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.
Fri, Aug 7, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Mon, Jul 20, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
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.
Fri, May 15, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Wed, Apr 15, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Tue, Apr 14, 2026
Radar estimate anywhere in the county: 2 in or larger (hen egg)
Reported in the county
- 1.75 in (1 S Wellsburg, IA)
- 1 in (Dike, IA)
Mon, Sep 22, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1 in (2 S Dike, IA)
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: 1 in or larger (quarter)
No hail reported in the county.
Sat, Aug 9, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Mon, Jul 28, 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: 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.
Thu, Jul 3, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
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.
Fri, Jun 20, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Thu, Jun 19, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Wed, Jun 11, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Wed, Apr 23, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Thu, Sep 12, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sun, Jul 28, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Tue, Jul 23, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Mon, Jul 15, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sun, Jul 14, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sun, Jun 9, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Tue, Jun 4, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sat, May 25, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
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, May 20, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sun, May 19, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1 in (Dike, IA)
Tue, Apr 23, 2024
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
Fri, Mar 29, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Wed, Aug 23, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Tue, Aug 22, 2023
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Fri, Aug 11, 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: 0.75 in or larger (penny)
No hail reported in the county.
Fri, Jul 28, 2023
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county
- 1 in (3 W Holland, IA)
Tue, Jul 25, 2023
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
Tue, Jul 18, 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: 1 in or larger (quarter)
No hail reported in the county.
Sat, Jun 24, 2023
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Tue, May 9, 2023
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sun, May 7, 2023
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sat, Sep 17, 2022
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Fri, Aug 19, 2022
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county
- 1.5 in (1 ENE HOLLAND, IA)
Mon, Aug 1, 2022
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Thu, Jul 28, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Tue, Jun 28, 2022
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Thu, Jun 16, 2022
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Wed, Jun 15, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Tue, Jun 14, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1 in (DIKE, IA)
Fri, May 20, 2022
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sun, May 8, 2022
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sun, Dec 26, 2021
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
Mon, Oct 18, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sat, Oct 9, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Fri, Oct 8, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sat, Sep 25, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sun, Sep 12, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Fri, Aug 27, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Tue, Aug 24, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sun, Aug 22, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sat, Aug 7, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Mon, Jul 26, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Fri, Jul 23, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Thu, Jul 22, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Tue, Jul 20, 2021
Radar estimate anywhere in the county: 2 in or larger (hen egg)
No hail reported in the county.
Wed, Jul 14, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Wed, Jun 2, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Wed, Mar 17, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.

Check your own address →Weather in Grundy 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.