Hail and tornadoes in McHenry County, IL
Since January 2021, radar estimated hail somewhere in McHenry County, IL on 40 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 10 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 164 hail reports in McHenry County, IL on 72 days, 5 of them 2 inches or larger. The largest: 2.75 in, near Richmond, on Wed, May 2, 2018.
By decade: 2000s: 48 · 2010s: 88 · 2020s: 28
Tornadoes since 1950
15 tornadoes have touched McHenry County, IL since 1950, 1 of them rated F3/EF3 or stronger. They killed 0 and injured 1.
Strongest
- Mon, Jan 7, 2008 · EF3 · 6.3 mi long, 100 yd wide · near Chemung · 1 injury
- Wed, Jul 12, 2023 · EF1 · 6.42 mi long, 200 yd wide · near Harmony
- Mon, Aug 9, 2021 · EF1 · 0.4 mi long, 70 yd wide · near Mccullom Lake
- Mon, Aug 10, 2020 · EF1 · 5.73 mi long, 200 yd wide · near Coral
- Wed, May 17, 2017 · EF1 · 1.94 mi long, 100 yd wide · near Chemung
Most recent
- Wed, Jun 24, 2026 · EF0 · 0.34 mi long, 10 yd wide · near Harmony
- Tue, May 7, 2024 · EF0 · 3.8 mi long, 50 yd wide · near Chemung
- Wed, Jul 12, 2023 · EF0 · 0.27 mi long, 125 yd wide · near Barrington Hills
- Wed, Jul 12, 2023 · EF1 · 6.42 mi long, 200 yd wide · near Harmony
- Wed, May 31, 2023 · EFU · 0.6 mi long, 25 yd wide · near Franklinville
- Mon, Aug 9, 2021 · EF1 · 0.4 mi long, 70 yd wide · near Mccullom Lake
- Mon, Aug 10, 2020 · EF1 · 5.73 mi long, 200 yd wide · near Coral
- Wed, May 17, 2017 · EF1 · 1.94 mi long, 100 yd wide · near Chemung
- Sat, Jul 18, 2015 · EF0 · 0.1 mi long, 50 yd wide · near Alden
- Sat, Jul 18, 2015 · EF0 · 0.1 mi long, 50 yd wide · near Lawrence
By decade: 2000s: 2 · 2010s: 6 · 2020s: 7
Still loading: NOAA's record goes back to 1950, and 2003 onward is in so far.
Every hail day since January 2021
- Sun, Aug 9, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Mon, Jul 27, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Fri, Jul 17, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Sat, Jul 4, 2026
Radar estimate anywhere in the county: 1 in or larger (quarter)
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, Jun 24, 2026
Radar estimate anywhere in the county: 1.5 in or larger (ping-pong ball)
Reported in the county- 1 in (1 NE Huntley, IL)
- 1.5 in (2 E Huntley, IL)
- 1 in (1 SSW Lake in the Hills, IL)
- 1 in (Algonquin, IL)
- Fri, Jun 5, 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: 2 in or larger (hen egg)
Reported in the county- 1 in (4 S Walworth, IL)
- 1 in (1 NE Huntley, IL)
- Mon, Mar 30, 2026
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Sun, Sep 21, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Sat, Aug 16, 2025
Radar estimate anywhere in the county: 2 in or larger (hen egg)
Reported in the county- 1 in (Woodstock, IL)
- 1.5 in (1 SW Port Barrington, IL)
- Sat, Aug 9, 2025
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Thu, Jul 10, 2025
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Tue, Aug 27, 2024
Radar estimate anywhere in the county: 2 in or larger (hen egg)
Reported in the county- 2.5 in (2 S Woodstock, IL)
- 1.75 in (4 N Marengo, IL)
- 1 in (1 W McHenry, IL)
- Mon, Aug 5, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Tue, Jul 23, 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: 0.75 in or larger (penny)
No hail reported in the county.
- Tue, Jun 25, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
Reported in the county- 1 in (3 WSW Woodstock, IL)
- Mon, Jun 24, 2024
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Sat, Jun 22, 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: 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.
- Tue, Feb 27, 2024Reported in the county
- 1 in (Huntley, IL)
- Fri, Jul 28, 2023
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Wed, Jun 28, 2023Reported in the county
- 1 in (3 W Marengo, IL)
- Wed, May 31, 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 E ALGONQUIN, IL)
- Tue, Sep 20, 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 (MCHENRY, IL)
- 1.75 in (LAKEMOOR, IL)
- 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 in or larger (quarter)
No hail reported in the county.
- Mon, Jun 13, 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: 0.75 in or larger (penny)
No hail reported in the county.
- Mon, Feb 21, 2022
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Tue, Sep 7, 2021
Radar estimate anywhere in the county: 2 in or larger (hen egg)
Reported in the county- 1.5 in (WOODSTOCK, IL)
- 1.5 in (HARVARD, IL)
- 1 in (2 E RICHMOND, IL)
- Sun, Aug 29, 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.
- Tue, Aug 10, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
No hail reported in the county.
- Sat, Jul 24, 2021
Radar estimate anywhere in the county: 1 in or larger (quarter)
No hail reported in the county.
- Sat, Jun 12, 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: 0.75 in or larger (penny)
No hail reported in the county.
- Tue, Mar 2, 2021
Radar estimate anywhere in the county: 0.75 in or larger (penny)
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.