Hail and tornadoes in Johnson County, IA

Since January 2021, radar estimated hail somewhere in Johnson County, IA on 43 days. The biggest estimate: 3 in or larger (teacup), on Sun, May 7, 2023. Hail was reported to the National Weather Service inside the county on 15 days.

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

Days with hail

since January 2021

1 inch or larger

days, estimated or reported

Largest radar estimate

3+ in

Sun, May 7, 2023

Largest reported

2.75 in

Tue, Mar 10, 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.

Radar-estimated hail on Sun, May 7, 2023 around the place, with the hail reported that day — Sun, May 7, 2023: radar-estimated hail around Johnson County, IA, with the hail reported that day.

Hail on record since 1955

NOAA's Storm Events database lists 192 hail reports in Johnson County, IA on 76 days, 5 of them 2 inches or larger. The largest: 2.75 in, near Oasis, on Tue, Mar 10, 2026.

By decade: 2000s: 54 · 2010s: 74 · 2020s: 64

Tornadoes since 1950

23 tornadoes have touched Johnson County, IA since 1950, none of them rated F3/EF3 or stronger. They killed 0 and injured 32.

Strongest

Fri, Mar 31, 2023 · EF2 · 14.69 mi long, 100 yd wide · near Hills
Fri, Mar 31, 2023 · EF2 · 16.93 mi long, 75 yd wide · near Cosgrove · 2 injuries
Fri, Mar 31, 2023 · EF2 · 4.19 mi long, 75 yd wide · near Solon
Thu, Apr 13, 2006 · F2 · 4.5 mi long, 587 yd wide · near Iowa City · 30 injuries
Fri, May 24, 2024 · EF1 · 4.06 mi long, 75 yd wide · near Lone Tree

Most recent

Thu, Apr 2, 2026 · EF0 · 1.4 mi long, 50 yd wide · near Lone Tree
Fri, May 24, 2024 · EF0 · 0.12 mi long, 50 yd wide · near Solon
Fri, May 24, 2024 · EF1 · 4.06 mi long, 75 yd wide · near Lone Tree
Fri, May 24, 2024 · EF1 · 11.49 mi long, 150 yd wide · near River Jct
Fri, May 24, 2024 · EF1 · 9.84 mi long, 100 yd wide · near Amish
Fri, Mar 31, 2023 · EF2 · 4.19 mi long, 75 yd wide · near Solon
Fri, Mar 31, 2023 · EF2 · 14.69 mi long, 100 yd wide · near Hills
Fri, Mar 31, 2023 · EF2 · 16.93 mi long, 75 yd wide · near Cosgrove · 2 injuries
Fri, Mar 31, 2023 · EF0 · 6.1 mi long, 50 yd wide · near Amish
Fri, Mar 31, 2023 · EF1 · 2.24 mi long, 700 yd wide · near Amish

By decade: 2000s: 7 · 2010s: 5 · 2020s: 11

Still loading: NOAA's record goes back to 1950, and 2003 onward is in so far.

Every hail day since January 2021

Wed, Sep 16, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Tue, Aug 11, 2026
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
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.
Fri, Jul 3, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Wed, Jun 10, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Tue, Apr 14, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
Reported in the county
- 1.5 in (Iowa City, IA)
Thu, Apr 2, 2026
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county
- 1.75 in (1 ESE Iowa City Municip, IA)
Mon, Mar 30, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sun, Mar 15, 2026
Reported in the county
- 1.5 in (2 S Hills, IA)
Tue, Mar 10, 2026
Radar estimate anywhere in the county: 2 in or larger (hen egg)
Reported in the county
- 2.5 in (3 W Iowa City Municipal, IA)
- 2.75 in (3 SW West Branch, IA)
Mon, Sep 22, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
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.
Thu, Jul 10, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1 in (Iowa City, IA)
Thu, Dec 12, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Wed, Oct 30, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Thu, Oct 24, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1 in (2 SW Williamstown, IA)
Thu, Oct 3, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Wed, Jul 31, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
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.
Wed, Jul 10, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Tue, Jun 25, 2024
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county
- 1 in (1 E North Liberty, IA)
- 1.75 in (1 SSE Solon, IA)
Mon, Jun 24, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sat, Jun 15, 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: 0.75 in or larger (penny)
No hail reported in the county.
Fri, May 24, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1 in (2 W Downey, IA)
Thu, May 23, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Tue, May 21, 2024
Reported in the county
- 1 in (1 SE Coralville, IA)
Sun, May 19, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Tue, Apr 16, 2024
Reported in the county
- 1 in (1 E Tiffin, IA)
- 1 in (2 SSW Williamstown, IA)
Wed, Oct 11, 2023
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1.5 in (1 WNW Amish, IA)
Fri, Jul 28, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Tue, Jul 11, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Sat, May 13, 2023
Reported in the county
- 1 in (2 S CORALVILLE, IA)
Sun, May 7, 2023
Radar estimate anywhere in the county: 3 in or larger (teacup)
Reported in the county
- 1 in (2 W CORALVILLE, IA)
- 1 in (2 SSE HILLS, IA)
- 1.5 in (2 WSW DOWNEY, IA)
Sat, May 6, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
Tue, Apr 4, 2023
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county
- 1 in (1 SW UNIVERSITY HEIGHTS, IA)
Fri, Mar 31, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
Reported in the county
- 1.75 in (2 E NORTH LIBERTY, IA)
- 1 in (CORALVILLE, IA)
Sun, Sep 18, 2022
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
Fri, Aug 19, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sun, Jul 31, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
Sun, Jul 10, 2022
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
Fri, Jun 24, 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, Feb 22, 2022
Radar estimate anywhere in the county: 3 in or larger (teacup)
No hail reported in the county.
Fri, Sep 17, 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: 0.75 in or larger (penny)
No hail reported in the county.
Wed, Aug 11, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.

Check your own address →Weather in Johnson 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.