Data current as of 2026-10-16 · Sourced from NOAA Storm Events
Over the past five years, the National Oceanic and Atmospheric Administration has recorded 123 hail storms within 25 miles of Grayslake, IL. Of those, 121 produced hail at least quarter-size — the threshold most insurance carriers consider potentially damaging to asphalt shingles. The largest reported hail in this window was egg-sized, which can fracture shingle mat and dent metal flashing on contact. 2026 was the most active year on record locally, with 35 documented hail events.
Check Hail History for a Specific Address in Grayslake| Severity | Count | What it means for roofs |
|---|---|---|
| Destructive | 4 events | Egg-size, expect mat fractures and gutter damage |
| Severe | 21 events | Ping pong-size, granule loss and bruising common |
| Significant | 96 events | Quarter-size, the standard insurance damage threshold |
| Moderate | 2 events | Marble-size, possible cosmetic damage |
| Year | Reported Hail Events Within 25 mi |
|---|---|
| 2026 | 35 events |
| 2025 | 21 events |
| 2024 | 19 events |
| 2023 | 35 events |
| 2022 | 13 events |
2026 was the busiest hail year on record locally for Grayslake, with 35 documented events inside the 25-mile radius. Storm activity in Grayslake typically peaks in spring and early summer, when the jet stream pushes Gulf moisture into the area and supercell thunderstorms become more frequent.
| Date | Location | Severity | Size | NOAA Comments |
|---|---|---|---|---|
| 2026-08-10 | Vernon Hills, IL | Significant | 1.00" | Trained spotter reports quarter size hail ongoing in Vernon Hills. |
| 2026-08-10 | 2 W Pell Lake, WI | Severe | 1.50" | Report from mPING: Ping Pong Ball (1.50 in.). |
| 2026-07-27 | 1 NW Roselle, IL | Significant | 1.25" | Report from mPING: Half Dollar (1.25 in.). |
| 2026-07-27 | 2 SE Wauconda, IL | Significant | 1.00" | Relayed via mping. Time estimated by radar. |
| 2026-07-27 | 1 SE Schaumburg, IL | Significant | 1.25" | Report from mPING: Half Dollar (1.25 in.). |
| 2026-07-27 | 1 W West Dundee, IL | Significant | 1.00" | Report from mPING: Quarter (1.00 in.). |
| 2026-07-27 | 1 S West Dundee, IL | Significant | 1.00" | Report from mPING: Quarter (1.00 in.). |
| 2026-07-27 | 1 SE Schaumburg, IL | Significant | 1.00" | Report from mPING: Quarter (1.00 in.). |
| 2026-07-27 | 1 NE Bristol, WI | Significant | 1.00" | Delayed report: Via social media quarter in hail reported between the interstate and CTH D on Hwy 50. Time estimated based on radar. |
| 2026-07-27 | 1 NW Kenosha, WI | Significant | 1.00" | Report from mPING: Quarter (1.00 in.) Time confirmed from radar. |
| 2026-07-27 | 2 SW Kenosha, WI | Significant | 1.00" | Report from mPING: Quarter (1.00 in.) Time confirmed from radar. |
| 2026-07-27 | 4 NE Pleasant Prairie, WI | Significant | 1.25" | Report from mPING: Half Dollar (1.25 in.). Time confirmed from radar. |
| 2026-06-24 | ALGONQUIN, IL | Significant | 1.00" | — |
| 2026-06-24 | ALGONQUIN, IL | Significant | 1.00" | — |
| 2026-06-24 | ALGONQUIN, IL | Significant | 1.00" | Multiple reports of quarter size hail were received from Algonquin. |
| 2026-06-24 | Algonquin, IL | Significant | 1.00" | Multiple public reports of quarter size hail near Algonquin. Relayed via mping. |
| 2026-06-24 | HUNTLEY, IL | Significant | 1.00" | — |
| 2026-06-24 | 1 SSW Lake in the Hills, IL | Significant | 1.00" | McHenry County EMA reports quarter size hail near Randall Road and Harnish Drive. |
| 2026-06-24 | 2 E Huntley, IL | Severe | 1.50" | Public report of 1.5 inch hail near Huntly. Relayed via mping. |
| 2026-06-24 | LAKE IN THE HILLS, IL | Significant | 1.00" | Quarter size hail was reported near Randall Road and Harnish Drive. |
NOAA has recorded 343 high-wind events within 25 miles of Grayslake, IL in the past five years. Of those, 342 reached severe-thunderstorm thresholds (58+ mph). The highest measured gust was 90 mph.
| Severity | Count |
|---|---|
| Severe | 116 events |
| Significant | 226 events |
| Moderate | 1 event |
| Date | Location | Gust (mph) | Severity | NOAA Comments |
|---|---|---|---|---|
| 2026-08-11 | 1 SSE South Barrington, IL | 81 | Severe | Private weather station. |
| 2026-07-27 | 1 SSE South Barrington, IL | 55 | Significant | Private weather station KILHOFFM60 reported 55 mph gust. |
| 2026-07-27 | 1 N West Dundee, IL | 54 | Significant | Private weather station KILCARPE8 reported 54 mph gust. |
| 2026-07-27 | 1 SW Beach Park, IL | 82 | Severe | The KUGN ASOS measured a peak wind gust of 82 mph at 3:43pm out of the northeast. Extensive damage was noted around Waukegan including snapped and uprooted trees. |
| 2026-07-27 | 1 SSE Lake Bluff, IL | 55 | Significant | Private weather station reported 55 mph gust near Lake Forest Cemetery. |
| 2026-07-27 | Waukegan, IL | 55 | Significant | Measured at the Waukegan Airport. |
| 2026-07-03 | 2 NNE Hanover Park, IL | 56 | Significant | Personal weather station measured wind gusts as storms passed over just east of Streamwood, IL. |
| 2026-07-03 | 1 ENE Prospect Heights, IL | 61 | Significant | Peak wind gust of 53 kt. |
| 2026-07-03 | 1 WSW Wheeling, IL | 60 | Significant | Personal weather station peak wind gust of 59.8 mph. |
| 2026-07-03 | 2 SSE Eagle Lake, WI | 65 | Severe | Private Weather Station. |
| 2026-07-03 | 3 N Pleasant Prairie, WI | 58 | Significant | ASOS measure 50 kts. |
| 2026-06-28 | 1 SE Wheeling, IL | 45 | Moderate | Measured at KPWK. |
| 2026-06-24 | HANOVER PARK, IL | 63 | Significant | A large tree limb was snapped and fell onto multiple parked vehicles. Other tree limbs were blown down nearby. |
| 2026-06-24 | ELGIN, IL | 75 | Severe | Large trees were blown down, some of the trees were snapped. Tree limbs and power lines were also blown down. |
| 2026-06-24 | 1 N West Dundee, IL | 55 | Significant | Private weather station KILCARPE8 reported 55 mph gust. |
| 2026-06-24 | ELGIN, IL | 63 | Significant | Tree limbs were blown down in Lords Park. |
| 2026-06-24 | ELGIN, IL | 75 | Severe | A photo showed a large tree that was blown down and crushed a pickup truck between Ford Avenue and Elma Avenue. |
| 2026-06-24 | STREAMWOOD, IL | 81 | Severe | Multiple photos and videos showed trees blown down, some uprooted, others snapped across the Streamwood area. At least one tree fell on a home causing a partial roof collapse. Numerous other large tree limbs and power lines were also blown down. |
| 2026-06-24 | WEST DUNDEE, IL | 69 | Severe | Large tree limbs were blown down near Barrington Avenue and Water Street. Barrington Avenue was blocked by fallen tree limbs, power lines and a broken utility pole. |
| 2026-06-24 | ELGIN, IL | 69 | Severe | In the Voyageur Landing Forest Preserve, multiple large tree limbs were broken and at least one tree was snapped at its base. A roadway was blocked due to tree debris. |
The most recent quarter-size-or-larger hail storm recorded by NOAA within 25 miles of Grayslake was on August 10, 2026. HailCheck refreshes from the NOAA Storm Events database daily, so newer events appear here as they are reported.
Grayslake averages roughly 25 reported hail events per year within a 25-mile radius. Significant storms (quarter-size or larger) account for 121 of the 123 events recorded over the last five years.
The largest documented hail near Grayslake in the last five years was egg-sized. Most Grayslake-area hail falls in the marble-to-quarter range, with destructive storms (egg-size or larger) appearing roughly once every few years.
Most homeowners insurance policies in IL cover hail damage to roofs, siding, and gutters under the dwelling and other-structures coverage. Coverage typically requires the damage to be tied to a verifiable storm date — which is where the NOAA hail history above (and a HAAG-style test square validation) becomes important for the claim file.
Use the HailCheck address search to enter any street address in or near Grayslake. HailCheck returns every NOAA hail event within a configurable radius, along with severity bands, dates, and storm narratives for Pro members.
If your property in or near Grayslake took on hail during one of the storms above, the standard process for documenting damage is a 10×10 foot test square inspection. A HAAG-trained reviewer counts impact indicators — granule displacement, mat fractures, and bruising — within the marked square and produces a PASS or FAIL document for the claim file.
HailCheck offers a $99 photo-based HAAG-style test square validation. You submit photos from the field, our reviewer evaluates the impact indicators and cross-references the NOAA storm dates listed above, and a written PASS/FAIL determination is returned within one business day. We do not send anyone to the roof — the validation is built around the photos you submit.
Learn About $99 HAAG-Style ValidationGrayslake sits east of the traditional hail alley, where hail events are less frequent than the central plains but tend to be associated with strong squall lines and tropical systems. Local roof systems are less commonly hardened for hail, which can mean even moderate impacts produce claim-worthy damage.