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 3 hail storms within 25 miles of Oakley, CA. Of those, 1 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 ping pong ball-sized, which can fracture shingle mat and dent metal flashing on contact. 2026 was the most active year on record locally, with 2 documented hail events.
Check Hail History for a Specific Address in Oakley| Severity | Count | What it means for roofs |
|---|---|---|
| Severe | 1 event | Ping pong-size, granule loss and bruising common |
| Minor | 2 events | Pea-size, unlikely to damage modern shingles |
| Year | Reported Hail Events Within 25 mi |
|---|---|
| 2026 | 2 events |
| 2024 | 1 event |
2026 was the busiest hail year on record locally for Oakley, with 2 documented events inside the 25-mile radius. Storm activity in Oakley 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 |
|---|---|---|---|---|
| 2026-04-12 | 1 W Walnut Creek, CA | Minor | 0.25" | Resident in Walnut Creek reported pea-sized hail via Twitter (X) post. |
| 2026-04-10 | Rio Vista, CA | Severe | 1.50" | Trained spotter reports 1.5 inch / ping pong hail in Rio Vista. |
| 2024-03-30 | PIEDMONT, CA | Minor | 0.25" | Approximate location. Pea-sized hail was reported in the Walnut Creek area via social media. |
NOAA has recorded 3 high-wind events within 25 miles of Oakley, CA in the past five years. Of those, 3 reached severe-thunderstorm thresholds (58+ mph). The highest measured gust was 70 mph.
| Severity | Count |
|---|---|
| Severe | 1 event |
| Significant | 2 events |
| Date | Location | Gust (mph) | Severity | NOAA Comments |
|---|---|---|---|---|
| 2024-04-05 | WALNUT HGTS, CA | 58 | Significant | Tree down in roadway along Danville Boulevard near Walnut Creek. Time estimated via radar. |
| 2024-04-05 | SARANAP, CA | 58 | Significant | Powerlines were downed along Boulevard Way near Walnut Creek. |
| 2023-01-10 | LODI KINGDON ARPT, CA | 70 | Severe | Thunderstorm wind caused damage to metal roofing and siding on a hay barn, with the time estimated from radar. |
The most recent quarter-size-or-larger hail storm recorded by NOAA within 25 miles of Oakley was on April 10, 2026. HailCheck refreshes from the NOAA Storm Events database daily, so newer events appear here as they are reported.
Oakley averages roughly 1 reported hail event per year within a 25-mile radius. Significant storms (quarter-size or larger) account for 1 of the 3 events recorded over the last five years.
The largest documented hail near Oakley in the last five years was ping pong ball-sized. Most Oakley-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 CA 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 Oakley. 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 Oakley 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 ValidationOakley 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.