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 115 hail storms within 25 miles of Windsor, CO. Of those, 93 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 39 documented hail events.
Check Hail History for a Specific Address in Windsor| Severity | Count | What it means for roofs |
|---|---|---|
| Destructive | 8 events | Egg-size, expect mat fractures and gutter damage |
| Severe | 22 events | Ping pong-size, granule loss and bruising common |
| Significant | 63 events | Quarter-size, the standard insurance damage threshold |
| Moderate | 22 events | Marble-size, possible cosmetic damage |
| Year | Reported Hail Events Within 25 mi |
|---|---|
| 2026 | 16 events |
| 2025 | 39 events |
| 2024 | 26 events |
| 2023 | 33 events |
| 2022 | 1 event |
2025 was the busiest hail year on record locally for Windsor, with 39 documented events inside the 25-mile radius. Storm activity in Windsor 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 |
|---|---|---|---|---|
| 2026-07-02 | 1 E Johnstown, CO | Significant | 1.25" | Hail was 2 to 3 inches deep covering the road. |
| 2026-07-02 | 2 NE Johnstown, CO | Significant | 1.00" | Report from mPING: Quarter (1.00 in.). |
| 2026-07-02 | 1 E Johnstown, CO | Significant | 1.25" | — |
| 2026-06-25 | 1 W Berthoud, CO | Severe | 1.50" | — |
| 2026-06-25 | 1 SE Berthoud, CO | Severe | 1.75" | — |
| 2026-06-25 | Berthoud, CO | Severe | 1.75" | Time estimated by radar. |
| 2026-06-25 | 1 NNW Berthoud, CO | Severe | 1.50" | — |
| 2026-06-24 | BERTHOUD, CO | Severe | 1.50" | — |
| 2026-06-24 | BERTHOUD, CO | Severe | 1.50" | — |
| 2026-06-24 | BERTHOUD, CO | Severe | 1.75" | — |
| 2026-06-24 | BERTHOUD, CO | Severe | 1.75" | — |
| 2026-06-21 | 1 SSW Lucerne, CO | Severe | 1.50" | — |
| 2026-06-20 | LUCERNE, CO | Severe | 1.50" | — |
| 2026-06-03 | GREELEY ARPT, CO | Moderate | 0.88" | — |
| 2026-06-03 | 4 SE Lucerne, CO | Moderate | 0.88" | — |
| 2026-03-06 | 2 N Longmont, CO | Moderate | 0.50" | — |
| 2025-09-16 | HARMONY, CO | Moderate | 0.75" | — |
| 2025-07-31 | GARDEN CITY, CO | Significant | 1.00" | — |
| 2025-07-31 | NUNN, CO | Significant | 1.00" | — |
| 2025-07-24 | GREELEY, CO | Significant | 1.00" | — |
NOAA has recorded 27 high-wind events within 25 miles of Windsor, CO in the past five years. Of those, 27 reached severe-thunderstorm thresholds (58+ mph). The highest measured gust was 90 mph.
| Severity | Count |
|---|---|
| Severe | 9 events |
| Significant | 18 events |
| Date | Location | Gust (mph) | Severity | NOAA Comments |
|---|---|---|---|---|
| 2026-08-22 | 5 NNW Nunn, CO | 65 | Severe | Mesonet station UP718 4.9 N Nunn (UPR). |
| 2026-08-14 | 2 NE Severance, CO | 71 | Severe | — |
| 2026-07-28 | 4 SW Carter Lake, CO | 58 | Significant | Personal weather station. |
| 2026-07-28 | 2 SSW Lower Latham Rese, CO | 57 | Significant | Personal weather station. |
| 2026-07-24 | 4 NE Loveland, CO | 59 | Significant | — |
| 2026-07-24 | 2 S Loveland, CO | 63 | Significant | — |
| 2026-07-07 | 2 ESE Severance, CO | 59 | Significant | Personal weather station. |
| 2025-07-31 | GILL, CO | 60 | Significant | Several loose items were blown across yard. |
| 2024-08-13 | CORNISH, CO | 59 | Significant | — |
| 2024-08-07 | NUNN, CO | 62 | Significant | Weather station UP718 five miles north of Nunn observed the 62 mph wind gust. |
| 2024-08-07 | NUNN, CO | 61 | Significant | A CDOT weather station reported a 61 mph wind gust near Nunn and then quit reporting wind speeds when the 61 mph gust hit. |
| 2024-07-20 | BERTHOUD, CO | 64 | Severe | — |
| 2024-07-20 | CAMPION, CO | 60 | Significant | Broadcast media source provided photos of flattened and shredded crops from a combination of wind and hail at a malthouse east of Campion. |
| 2024-07-20 | BERTHOUD, CO | 58 | Significant | — |
| 2024-07-20 | MEAD, CO | 58 | Significant | — |
| 2024-06-20 | LA SALLE, CO | 90 | Severe | Multiple powerlines down 22628 county road 39, about 1.5 miles south of La Salle. |
| 2023-08-10 | BUCKEYE, CO | 63 | Significant | — |
| 2023-08-05 | JOHNSTOWN, CO | 69 | Severe | Intense straight-line winds uprooted two trees. In addition, a nearby corn field was also flattened west of the location. |
| 2023-07-24 | GREELEY ARPT, CO | 58 | Significant | — |
| 2023-05-31 | LA SALLE, CO | 60 | Significant | — |
The most recent quarter-size-or-larger hail storm recorded by NOAA within 25 miles of Windsor was on July 2, 2026. HailCheck refreshes from the NOAA Storm Events database daily, so newer events appear here as they are reported.
Windsor averages roughly 23 reported hail events per year within a 25-mile radius. Significant storms (quarter-size or larger) account for 93 of the 115 events recorded over the last five years.
The largest documented hail near Windsor in the last five years was egg-sized. Most Windsor-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 CO 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 Windsor. 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 Windsor 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 ValidationWindsor sits inside the central United States hail belt, where warm Gulf moisture collides with cold continental air to produce supercell thunderstorms capable of dropping the hail documented above. Properties in this zone typically see at least one significant hail event every two to four years.