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 24 hail storms within 25 miles of Johnstown, PA. Of those, 21 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. 2025 was the most active year on record locally, with 17 documented hail events.
Check Hail History for a Specific Address in Johnstown| Severity | Count | What it means for roofs |
|---|---|---|
| Destructive | 2 events | Egg-size, expect mat fractures and gutter damage |
| Severe | 8 events | Ping pong-size, granule loss and bruising common |
| Significant | 11 events | Quarter-size, the standard insurance damage threshold |
| Moderate | 2 events | Marble-size, possible cosmetic damage |
| Minor | 1 event | Pea-size, unlikely to damage modern shingles |
| Year | Reported Hail Events Within 25 mi |
|---|---|
| 2026 | 5 events |
| 2025 | 17 events |
| 2024 | 1 event |
| 2022 | 1 event |
2025 was the busiest hail year on record locally for Johnstown, with 17 documented events inside the 25-mile radius. Storm activity in Johnstown 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 |
|---|---|---|---|---|
| 2026-05-13 | STAHLSTOWN, PA | Significant | 1.00" | — |
| 2026-05-13 | 4 NE Donegal, PA | Significant | 1.00" | Time estimated via radar. |
| 2026-03-11 | 5 ESE Clymer, PA | Significant | 1.00" | Image shared with us on facebook with an estimated measurement. |
| 2026-03-11 | KENWOOD, PA | Significant | 1.00" | Estimated 1 inch hail. |
| 2026-03-03 | 3 NE Geistown, PA | Minor | 0.19" | ASOS station KJST Johnstown Airport. |
| 2025-05-04 | STRANGFORD, PA | Significant | 1.00" | — |
| 2025-05-04 | LONGBRIDGE, PA | Significant | 1.00" | — |
| 2025-05-04 | STRANGFORD, PA | Significant | 1.00" | — |
| 2025-05-04 | BLACK LICK, PA | Significant | 1.00" | — |
| 2025-05-04 | MARSHALL HGTS, PA | Significant | 1.00" | — |
| 2025-05-04 | BLACK LICK, PA | Significant | 1.00" | — |
| 2025-05-04 | CHEVY CHASE HGTS, PA | Severe | 1.75" | — |
| 2025-05-04 | HOMER CITY, PA | Severe | 1.75" | — |
| 2025-05-04 | CLAYPOOLE HGTS, PA | Severe | 1.75" | — |
| 2025-05-04 | CLAYPOOLE HGTS, PA | Severe | 1.75" | — |
| 2025-05-04 | CHEVY CHASE HGTS, PA | Destructive | 2.50" | — |
| 2025-05-04 | CHEVY CHASE HGTS, PA | Severe | 1.50" | — |
| 2025-05-04 | CHEVY CHASE HGTS, PA | Severe | 1.50" | — |
| 2025-05-04 | CLAYPOOLE HGTS, PA | Destructive | 2.25" | — |
| 2025-05-04 | HOMER CITY, PA | Severe | 1.50" | — |
NOAA has recorded 176 high-wind events within 25 miles of Johnstown, PA in the past five years. Of those, 176 reached severe-thunderstorm thresholds (58+ mph). The highest measured gust was 120 mph.
| Severity | Count |
|---|---|
| Destructive | 1 event |
| Severe | 47 events |
| Significant | 128 events |
| Date | Location | Gust (mph) | Severity | NOAA Comments |
|---|---|---|---|---|
| 2026-09-03 | 3 NE Geistown, PA | 59 | Significant | KJST measured at 51 knot gust. |
| 2026-06-22 | WELLSCREEK, PA | 60 | Significant | A severe thunderstorm, producing wind gusts estimated near 60 mph, knocked down multiple trees in the vicinity of Listie Road and Heyer Road south of Friedens. |
| 2026-06-14 | NEW FLORENCE, PA | 58 | Significant | Tree down. |
| 2026-06-14 | KINGSTON, PA | 58 | Significant | Wires down. |
| 2026-06-14 | CRISP, PA | 58 | Significant | Tree down. |
| 2026-06-14 | BLUE KNOB, PA | 60 | Significant | A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked multiple trees down in Freedom Township. |
| 2026-06-14 | STOYSTOWN, PA | 60 | Significant | A severe thunderstorm producing wind gusts estimated at 60 mph knocked trees and wires down near Stoystown. |
| 2026-06-14 | BELMONT, PA | 60 | Significant | A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked multiple trees down on Bedford Street. |
| 2026-06-14 | PAVIA, PA | 60 | Significant | A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked a large tree down onto the roadway in Blue Knob State Park, near the Burnt House Picnic Area. |
| 2026-06-14 | WANDIN JCT, PA | 58 | Significant | Power lines down. |
| 2026-06-11 | HUSBAND, PA | 60 | Significant | A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked trees and wires down on Hoover Road and Husband Road, blocking both lanes of traffic. |
| 2026-06-11 | BROWNSTOWN, PA | 60 | Significant | A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked a tree down on St Clair Road near the Falcon Drive intersection. |
| 2026-06-11 | HOLLSOPPLE, PA | 60 | Significant | A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked wires down on Moonlite Pike Road near Benson. |
| 2026-06-11 | IMLER, PA | 60 | Significant | A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked trees and wires down near the intersection of South Dakota Road and Sarah Furnace Road. |
| 2026-06-11 | OGLETOWN, PA | 60 | Significant | A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked trees and wires down along Hollow Road. |
| 2026-06-11 | CRESSON, PA | 60 | Significant | A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked wires down near the intersection of Short Avenue and Country Club Road in Cresson. |
| 2026-06-11 | WEYANT, PA | 60 | Significant | A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked trees and wires down along Shellsburg Road, resulting in a small brush fire. |
| 2026-06-11 | FERRELTON, PA | 60 | Significant | A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked a tree down near the intersection of Green Bridge Road and Emerick Road. |
| 2026-06-11 | NANTY GLO, PA | 60 | Significant | A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked wires down near the intersection of 3rd Street and Hemlock Street in Nanty-Glo. |
| 2026-06-11 | VINCO, PA | 60 | Significant | A line of severe thunderstorms producing wind gusts estimated at 60 mph knocked wires down on Chime Road. |
The most recent quarter-size-or-larger hail storm recorded by NOAA within 25 miles of Johnstown was on May 13, 2026. HailCheck refreshes from the NOAA Storm Events database daily, so newer events appear here as they are reported.
Johnstown averages roughly 5 reported hail events per year within a 25-mile radius. Significant storms (quarter-size or larger) account for 21 of the 24 events recorded over the last five years.
The largest documented hail near Johnstown in the last five years was egg-sized. Most Johnstown-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 PA 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 Johnstown. 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 Johnstown 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 ValidationJohnstown 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.