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 12 hail storms within 25 miles of Nampa, ID. Of those, 10 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. 2022 was the most active year on record locally, with 6 documented hail events.
Check Hail History for a Specific Address in Nampa| Severity | Count | What it means for roofs |
|---|---|---|
| Severe | 1 event | Ping pong-size, granule loss and bruising common |
| Significant | 9 events | Quarter-size, the standard insurance damage threshold |
| Moderate | 2 events | Marble-size, possible cosmetic damage |
| Year | Reported Hail Events Within 25 mi |
|---|---|
| 2026 | 3 events |
| 2024 | 3 events |
| 2022 | 6 events |
2022 was the busiest hail year on record locally for Nampa, with 6 documented events inside the 25-mile radius. Storm activity in Nampa 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 |
|---|---|---|---|---|
| 2026-07-24 | 4 SE Boise, ID | Significant | 1.00" | — |
| 2026-07-24 | 3 SE Boise, ID | Moderate | 0.75" | — |
| 2026-07-24 | 3 SE Boise, ID | Significant | 1.00" | — |
| 2024-04-03 | SONNA, ID | Moderate | 0.75" | An NWS Employee measured 0.75 inch hail from this storm. |
| 2024-04-03 | BRADLEY ARPT, ID | Significant | 1.00" | A member of the public measured 1.0 inch hail from this storm. |
| 2024-04-03 | BOISE STRAWBERRY GLE, ID | Significant | 1.00" | A member of the public measured 1.0 inch hail from this storm. |
| 2022-08-11 | PARMA ARPT, ID | Severe | 1.50" | This photo was submitted on social media and the time was estimated from radar. |
| 2022-08-11 | PARMA ARPT, ID | Significant | 1.00" | A member of the public submitted a photo of this on social media. |
| 2022-06-05 | MELBA, ID | Significant | 1.25" | A member of the public submitted a photo on social media. |
| 2022-06-05 | MURPHY, ID | Significant | 1.00" | A member of the public posted a photo of hail on social media. |
| 2022-06-05 | KUNA, ID | Significant | 1.25" | A trained spotter confirmed hail was 1.25 inches wide. |
| 2022-06-05 | OWYHEE, ID | Significant | 1.00" | A Twitter user tagged us in this photo of hail. |
NOAA has recorded 41 high-wind events within 25 miles of Nampa, ID in the past five years. Of those, 39 reached severe-thunderstorm thresholds (58+ mph). The highest measured gust was 73 mph.
| Severity | Count |
|---|---|
| Severe | 7 events |
| Significant | 32 events |
| Moderate | 2 events |
| Date | Location | Gust (mph) | Severity | NOAA Comments |
|---|---|---|---|---|
| 2026-06-27 | 4 NW Nampa, ID | 53 | Significant | Delayed report: AWOS station KEUL Caldwell. |
| 2026-06-27 | 4 SSW Boise, ID | 55 | Significant | Delayed report: ASOS station KBOI Boise. |
| 2026-06-10 | 1 SE Boise, ID | 41 | Moderate | Mesonet station BSUI1 Nws Iwos 4. |
| 2026-06-10 | 2 NE Boise, ID | 41 | Moderate | Mesonet station TT289 Crestline Trail. |
| 2026-05-28 | MARSING, ID | 59 | Significant | Idaho Transportation Department Mesonet CN2T6 measured a 59 mph wind gust associated with thunderstorm outflow. |
| 2026-05-28 | KUNA, ID | 60 | Significant | Numerous reports of trees downed or large branches snapped throughout the Boise metropolitan area. The two points were based on two reports that reasonably capture the south to north extent of damage, with timing estimated by radar. Reports of storm damage extend as far west as Caldwell and as far east as Boise. With the extent of damage, and measured gusts nearby, this damage was likely caused by winds of at least 60 mph. This damage was caused by the same outflow boundary associated with thunderstorms. |
| 2026-05-28 | 4 E Kuna, ID | 72 | Severe | — |
| 2026-05-28 | KUNA, ID | 73 | Severe | Mesonet station CP2T11 measured a 72 mph wind gust associated with thunderstorm outflow. |
| 2026-05-28 | BOISE TERMINAL ARPT, ID | 68 | Severe | A 68 mph wind gust was recorded at the Boise Airport, associated with thunderstorm outflow. |
| 2026-05-28 | 2 S Boise, ID | 68 | Severe | Thunderstorm wind gust measured at Boise Airport. |
| 2026-05-28 | 3 S Boise, ID | 59 | Significant | ITDD5 Boise I-84 Eastbound. |
| 2026-05-28 | (BOI)GOWEN FLD BOISE, ID | 59 | Significant | Idaho Transportation Department Mesonet ITD03 measured a 59 mph wind gust associated with thunderstorm outflow. |
| 2026-05-25 | MERIDIAN, ID | 58 | Significant | Public reported a tree branch broken off. Photo suggests the large branch was broken off where it connects to the trunk. Based on nearby reports, it is reasonable to assume this damage was associated with a thunderstorm gust of at least 58 mph. |
| 2026-05-25 | BOISE HILLS VLG, ID | 59 | Significant | At 328pm MST, the Crestline RAWS reported a thunderstorm wind gust of 59 mph. |
| 2026-05-25 | (BOI)GOWEN FLD BOISE, ID | 60 | Significant | Public report of heavy roof damage to a cargo facility located on the airport. The report was later confirmed by an FAA official and photos showing portions of the roof blown off by a thunderstorm gust. Gusts estimated to be at least 60 mph. |
| 2026-05-25 | 2 NE Boise, ID | 59 | Significant | Crestline RAWS. |
| 2024-09-02 | BOISE HILLS VLG, ID | 58 | Significant | The public reported a large spruce tree down. |
| 2024-09-02 | BOISE TERMINAL ARPT, ID | 63 | Significant | The ASOS station at the Boise airport reported a high wind gust from a thunderstorm outflow boundary. |
| 2024-09-02 | BOISE, ID | 60 | Significant | The public reported a large spruce tree was knocked down along with old juniper trees. Idaho Power reported that this caused 2000 customers to be without power in the Boise North End. |
| 2024-09-02 | BOISE, ID | 58 | Significant | A large spruce tree was knocked down at Morris Hill Cemetery. |
The most recent quarter-size-or-larger hail storm recorded by NOAA within 25 miles of Nampa was on July 24, 2026. HailCheck refreshes from the NOAA Storm Events database daily, so newer events appear here as they are reported.
Nampa averages roughly 2 reported hail events per year within a 25-mile radius. Significant storms (quarter-size or larger) account for 10 of the 12 events recorded over the last five years.
The largest documented hail near Nampa in the last five years was ping pong ball-sized. Most Nampa-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 ID 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 Nampa. 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 Nampa 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 ValidationNampa 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.