Hail and tornadoes in Winnebago County, IL
Since January 2021, radar estimated hail somewhere in Winnebago County, IL on 51 days. The biggest estimate: 2 in or larger (hen egg), on Sat, Aug 16, 2025. Hail was reported to the National Weather Service inside the county on 14 days.
Still loading: radar estimates go back to Wed, Oct 14, 2020, and the earlier years are being added.
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 166 hail reports in Winnebago County, IL on 78 days, 12 of them 2 inches or larger. The largest: 3 in, near Winnebago, on Tue, Apr 7, 2020.
By decade: 2000s: 44 · 2010s: 68 · 2020s: 54
Tornadoes since 1950
18 tornadoes have touched Winnebago County, IL since 1950, none of them rated F3/EF3 or stronger. They killed 0 and injured 6.
Strongest
- Mon, Nov 22, 2010 · EF2 · 1.7 mi long, 200 yd wide · near Rock Cut State Park · 6 injuries
- Fri, Apr 17, 2026 · EF1 · 3.95 mi long, 400 yd wide · near Harrison
- Fri, Apr 17, 2026 · EF1 · 10.88 mi long, 350 yd wide · near Harrison
- Fri, Mar 31, 2023 · EF1 · 4.53 mi long, 600 yd wide · near New Milford
- Fri, Mar 31, 2023 · EF1 · 8.63 mi long, 300 yd wide · near Loves Park
Most recent
- Fri, Apr 17, 2026 · EF1 · 10.88 mi long, 350 yd wide · near Harrison
- Fri, Apr 17, 2026 · EF1 · 3.95 mi long, 400 yd wide · near Harrison
- Fri, Apr 17, 2026 · EFU · 0.69 mi long, 50 yd wide · near Pecatonica
- Mon, Jul 15, 2024 · EF0 · 0.2 mi long, 25 yd wide · near New Milford
- Mon, Jul 15, 2024 · EF0 · 1.2 mi long, 100 yd wide · near Westfield Corners
- Fri, Mar 31, 2023 · EF1 · 8.63 mi long, 300 yd wide · near Loves Park
- Fri, Mar 31, 2023 · EF1 · 4.53 mi long, 600 yd wide · near New Milford
- Fri, Mar 31, 2023 · EF1 · 5.79 mi long, 300 yd wide · near Rockford
- Mon, Aug 10, 2020 · EF1 · 6.03 mi long, 300 yd wide · near Samuelson Corners
- Mon, Aug 10, 2020 · EF0 · 1.58 mi long, 50 yd wide · near Rckfrd Cottonwood Ar
By decade: 2000s: 2 · 2010s: 6 · 2020s: 10
Still loading: NOAA's record goes back to 1950, and 2003 onward is in so far.
Every hail day since January 2021
- Tue, Oct 13, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Sat, Sep 26, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Fri, Aug 21, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county- 1 in (1 N Machesney Park, IL)
- Fri, Jul 3, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Thu, Jun 25, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Wed, Jun 24, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Wed, Jun 10, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Fri, Apr 17, 2026
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county- 1.5 in (South Beloit, IL)
- 2.25 in (2 NE Lake Summerset, IL)
- Wed, Apr 15, 2026Reported in the county
- 1 in (Winnebago, IL)
- Tue, Apr 14, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county- 1 in (Pecatonica, IL)
- Tue, Mar 10, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Tue, Sep 2, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Mon, Aug 18, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Sat, Aug 16, 2025
Radar estimate anywhere in the county: 2 in or larger (hen egg)
No hail reported in the county.
- Thu, Jul 10, 2025
Radar estimate anywhere in the county: 2 in or larger (hen egg)
Reported in the county- 1.5 in (2 E Loves Park, IL)
- 1 in (2 ESE Machesney Park, IL)
- Fri, May 16, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
Reported in the county- 1 in (Cherry Valley, IL)
- Thu, May 15, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Thu, Sep 12, 2024
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
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 22, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
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.
- Sat, Jul 13, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Tue, Jun 25, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Mon, Jun 24, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Sun, Jun 16, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Mon, Jun 3, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Tue, May 7, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Sat, May 4, 2024
Radar estimate anywhere in the county: 0.75 in or larger (penny)
Reported in the county- 1 in (5 NE Pecatonica, IL)
- Mon, Mar 4, 2024
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
- Tue, Feb 27, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county- 1.5 in (3 ENE Pecatonica, IL)
- Sat, Sep 16, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Wed, Aug 16, 2023
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county- 1 in (South Beloit, IL)
- Fri, Jul 28, 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: 1 in or larger (quarter)
No hail reported in the county.
- Wed, Jul 5, 2023
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Tue, Jul 4, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Wed, Jun 28, 2023
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county- 2 in (Loves Park, IL)
- Thu, Apr 20, 2023
Radar estimate anywhere in the county: 0.75 in or larger (penny)
Reported in the county- 1 in (3 ESE LOVES PARK, IL)
- Tue, Apr 4, 2023
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county- 1 in (5 WNW MACHESNEY PARK, IL)
- 1.5 in (ROCKTON, IL)
- 1 in (2 NE ROSCOE, IL)
- 1 in (SOUTH BELOIT, IL)
- Tue, Sep 20, 2022
Radar estimate anywhere in the county: 2 in or larger (hen egg)
No hail reported in the county.
- Sat, Sep 3, 2022
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Wed, Aug 3, 2022
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Fri, Jul 22, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Tue, Jul 5, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Mon, Jul 4, 2022
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
No hail reported in the county.
- Wed, May 18, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Fri, May 13, 2022Reported in the county
- 1 in (DURAND, IL)
- Sat, Apr 30, 2022Reported in the county
- 1.5 in (1 S ROCKFORD AIRPORT, IL)
- Tue, Feb 22, 2022
Radar estimate anywhere in the county: 2 in or larger (hen egg)
No hail reported in the county.
- Tue, Sep 7, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
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.
- Tue, Aug 10, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Thu, Jun 24, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Sun, Jun 20, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
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.