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 79 hail storms within 25 miles of Norristown, PA. Of those, 41 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. 2022 was the most active year on record locally, with 29 documented hail events.
Check Hail History for a Specific Address in Norristown| Severity | Count | What it means for roofs |
|---|---|---|
| Destructive | 1 event | Egg-size, expect mat fractures and gutter damage |
| Severe | 3 events | Ping pong-size, granule loss and bruising common |
| Significant | 37 events | Quarter-size, the standard insurance damage threshold |
| Moderate | 35 events | Marble-size, possible cosmetic damage |
| Minor | 3 events | Pea-size, unlikely to damage modern shingles |
| Year | Reported Hail Events Within 25 mi |
|---|---|
| 2026 | 10 events |
| 2025 | 11 events |
| 2024 | 8 events |
| 2023 | 21 events |
| 2022 | 29 events |
2022 was the busiest hail year on record locally for Norristown, with 29 documented events inside the 25-mile radius. Storm activity in Norristown 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 |
|---|---|---|---|---|
| 2026-08-20 | 2 N Plymouth Meeting, PA | Moderate | 0.75" | Report from mPING: Dime (0.75 in.). |
| 2026-08-20 | 1 N Plymouth Meeting, PA | Moderate | 0.75" | Report from mPING: Dime (0.75 in.). |
| 2026-07-27 | Chestnut Hill, PA | Moderate | 0.50" | 0.25 to 0.50 inch hail reported in Chestnut Hill. Winds estimated around 40 mph. |
| 2026-06-22 | East Greenwich Twp, NJ | Minor | 0.25" | Report of pea sized hail. Time estimated from radar. |
| 2026-06-22 | 1 N Upper Uwchlan Twp, PA | Significant | 1.00" | Report from mPING: Quarter (1.00 in.). |
| 2026-06-22 | LUDWIGS CORNER, PA | Significant | 1.00" | Quarter sized hail reported from mping. |
| 2026-05-20 | 1 WNW Wayne, PA | Significant | 1.00" | Time estimated from radar. Picture sent in from skywarn spotter. |
| 2026-05-20 | WAYNE, PA | Significant | 1.00" | Skywarn spotter sent a picture of quarter-sized hail. |
| 2026-03-03 | 2 ESE Sanatoga, PA | Minor | 0.06" | ASOS station KPTW Pottstown. |
| 2026-03-03 | Stowe, PA | Minor | 0.05" | Updates previous report. |
| 2025-07-08 | STOWE, PA | Moderate | 0.75" | A report from Mping of 0.75 inch hail. Time estimated from radar. |
| 2025-07-08 | POTTSTOWN, PA | Significant | 1.00" | Quarter-size hail in Pottstown. Video sent via social media. Time included with report. |
| 2025-05-03 | PRIMOS, PA | Moderate | 0.88" | Nickel-sized hail was observed. |
| 2025-05-03 | ROCKLEDGE, PA | Significant | 1.00" | A report of 1 inch diameter hail was relayed through MPing. |
| 2025-04-04 | GRACE PARK, PA | Significant | 1.25" | From a trained spotter who also estimated 65 mph wind gusts. Time given in report. |
| 2025-04-04 | RUTLEDGE, PA | Significant | 1.00" | Report from mping. Time estimated from radar. |
| 2025-04-04 | RUTLEDGE, PA | Moderate | 0.75" | A trained spotter reported dime and nickel sized hail. |
| 2025-04-04 | RUTLEDGE, PA | Significant | 1.00" | Quarter sized hail was reported. Time estimated from radar. |
| 2025-04-04 | NATIONAL PARK, NJ | Moderate | 0.75" | — |
| 2025-04-04 | PAULSBORO, NJ | Moderate | 0.75" | — |
NOAA has recorded 495 high-wind events within 25 miles of Norristown, PA in the past five years. Of those, 494 reached severe-thunderstorm thresholds (58+ mph). The highest measured gust was 105 mph.
| Severity | Count |
|---|---|
| Destructive | 1 event |
| Severe | 17 events |
| Significant | 476 events |
| Moderate | 1 event |
| Date | Location | Gust (mph) | Severity | NOAA Comments |
|---|---|---|---|---|
| 2026-08-07 | 1 W Logan Twp., NJ | 45 | Moderate | Mesonet station NJ65 Logan Twp. |
| 2026-08-07 | Levittown, PA | 58 | Significant | Measured wind gust by a trained spotter on a hand anemometer. |
| 2026-07-11 | Philadelphia Internatio, PA | 56 | Significant | ASOS station KPHL Philadelphia International Airport. |
| 2026-07-11 | Ardmore, PA | 55 | Significant | Trained spotter measured wind gust in Ardmore. Minor flooding of streets also reported. |
| 2026-07-11 | 1 SSW Haverford, PA | 60 | Significant | Trained spotter estimates wind gusts up to 60 mph in Ardmore, Haverford Township. Flooding on Haverford Road. |
| 2026-07-05 | 1 NNE East Caln Twp, PA | 62 | Significant | Measured from anemometer. Reported from spotter network. |
| 2026-06-22 | MARSHALLTON, PA | 58 | Significant | Multiple reports of wires down along Clayton Road. Time estimated from radar. |
| 2026-06-22 | CHESTER, PA | 58 | Significant | Several trees downed across Chester. Time estimated by radar. |
| 2026-06-22 | BRIDESBURG, PA | 58 | Significant | News broadcast reports a tree down in Port Richmond near Interstate 95 and Allegheny Avenue Exit 25. Time estimated from radar. |
| 2026-06-22 | MANTUA, NJ | 58 | Significant | Several trees and wires down across Mantua Township. Time estimated by radar. |
| 2026-06-22 | ALDHAM, PA | 58 | Significant | Trees and wires down reported around Charlestown Township. Time estimated by radar. |
| 2026-06-22 | CHELTENHAM, PA | 58 | Significant | Trees down around Tookany Creek Park. Time estimated by radar. |
| 2026-06-22 | BETZWOOD, PA | 58 | Significant | Multiple trees uprooted with large branches also snapped. Time estimated from radar. |
| 2026-06-22 | HOWELLVILLE, PA | 58 | Significant | Delayed report. Multiple trees down near Welsh Valley Rd and Yellow Springs Rd. Time estimated from radar. |
| 2026-06-22 | MIQUON, PA | 58 | Significant | Downed tree on I-76 westbound 2.5 miles east of Exit 332. Time given in report. |
| 2026-06-22 | FOX CHASE, PA | 58 | Significant | Large tree limb downed near intersection of Jeanes Street and Solly Ave. Time estimated by radar. |
| 2026-06-22 | FOX CHASE, PA | 58 | Significant | Large tree limb downed within 8100 block of Pine Road. Time estimated by radar. |
| 2026-06-22 | FOX CHASE, PA | 58 | Significant | Tree limb downed near intersection of Ferndale Street and Rhawn Street. Time estimated by radar. |
| 2026-06-22 | FOX CHASE, PA | 58 | Significant | Several large tree limbs downed within the 8000 block of Burholme Ave. Time estimated by radar. |
| 2026-06-22 | TACONY, PA | 58 | Significant | Multiple large tree branches and a tree snapped. Time estimated from radar. |
The most recent quarter-size-or-larger hail storm recorded by NOAA within 25 miles of Norristown was on June 22, 2026. HailCheck refreshes from the NOAA Storm Events database daily, so newer events appear here as they are reported.
Norristown averages roughly 16 reported hail events per year within a 25-mile radius. Significant storms (quarter-size or larger) account for 41 of the 79 events recorded over the last five years.
The largest documented hail near Norristown in the last five years was egg-sized. Most Norristown-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 Norristown. 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 Norristown 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 ValidationNorristown 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.