Idaho Storm Data: Hail & Wind History Since 2010
Deduplicated storm activity for Idaho, fused from NWS warnings, storm reports, official records, and FEMA declarations.
Latest Idaho hail and wind storms
- Last reported hail in Idaho (0.75 in.+, screening): September 17, 2026 — 2.50 in. reported at Rose (Bingham County), SPC storm report.
- 2026 so far in Idaho: 9 hail days and 83 wind days statewide (days with a storm report or station gust at the screening thresholds; warnings alone never count).
| Date | Largest reported hail | Strongest gust | City pages hit |
|---|---|---|---|
| October 10, 2026 | — | 59 mph measured | — |
| October 9, 2026 | — | 71 mph measured | — |
| September 25, 2026 | — | 58 mph measured | — |
| September 17, 2026 | 2.50 in. reported | 61 mph measured | — |
| September 10, 2026 | — | 57 mph measured | — |
| September 6, 2026 | — | 54 mph measured | — |
| September 1, 2026 | — | 65 mph measured | — |
| August 31, 2026 | — | 55 mph measured | — |
| August 28, 2026 | — | 66 mph measured | — |
| August 27, 2026 | — | 51 mph measured | — |
Idaho storm facts
- StormAuditor's analysis of NOAA and National Weather Service records found 2,379 deduplicated storm events (wind, hail, tornado, and flood; NWS warning products included) in Idaho in the 12 months ending October 21, 2026.
- Storm activity touched 44 of 44 Idaho counties over that period.
- The most impacted county in Idaho was Butte, with 352 events.
- The busiest day by event count in Idaho was December 17, 2025, with 250 events.
Idaho storm activity at a glance (last 12 months)
StormAuditor's consolidated public record currently shows 2,379 storm events impacting 44 of Idaho's 44 counties in the trailing 12 months: 1,950 wind events, 342 hail events, 2 tornado events, 85 flood events. Every count includes NWS warnings as well as observed reports, so tornado events mean tornado warnings and reports, not confirmed tornadoes.
Events are fused from National Weather Service warnings and Special Weather Statements, observed Local Storm Reports, official NCEI storm records, and FEMA disaster declarations, then consolidated into a single event table under the published methodology.
Wind covers thunderstorm and non-thunderstorm wind alike, so these counts measure something different from the NCEI entry counts in the history section below; the two are not comparable year to year. State totals also count NWS Special Weather Statements (radar-indicated hail or gusts below warning level); city pages leave those out.
Busiest days in Idaho by event count
Ranked by the number of 12-month events, NWS warnings included, so a day with many warnings can outrank a day with larger hail.
- December 17, 2025 — 250 events incl. warnings (hail, wind)
- March 14, 2026 — 187 events incl. warnings (flood, wind)
- May 13, 2026 — 114 events incl. warnings (hail, wind)
- March 12, 2026 — 83 events incl. warnings (wind)
- June 10, 2026 — 73 events incl. warnings (wind)
Most impacted counties
Events of every type for each county — wind, hail, tornado and flood, NWS warnings and Special Weather Statements included. City pages count wind and hail events only, so a county number on a city page is never higher than the number here.
- Butte — 352 events
- Bingham — 202 events
- Bonneville — 173 events
- Jefferson — 142 events
- Cassia — 136 events
- Bannock — 105 events
- Power — 83 events
- Clark — 78 events
Additional activity recorded under other NWS area names (forecast zones, tribal lands, and former census areas): Arco-Mud Lake Desert (18) · Snake River Plain (18) · Magic Valley (14) · Raft River Region (10).
How these numbers are counted
The storm numbers on this page are counted in four different ways, plus the free address check. Each answers a different question with its own size cutoffs, area and time span, so compare numbers within one group, not across groups.
- Storm days (latest hail and wind): A day in the last 12 months when at least one report anywhere in Idaho showed hail 0.75 in. or larger or wind of 45 mph or more (StormAuditor screening thresholds). Reports are NWS storm reports from spotters, the public and officials, plus weather-station gusts, which count from 50 mph. A warning on its own never makes a storm day. The "City pages hit" column and each city's last reported hail apply the same rule within 25 miles of the city. The statewide columns count reports inside Idaho only. City pages count reports within 25 miles of each city, which can reach into a neighboring state; those values name the other state, so a border city's value for a day can be higher than the Idaho value.
- Storm-date pages (NWS severe): A storm-date page is published only when at least one report or station gust within 25 miles of a city met the National Weather Service severe criteria (hail 1.00 in. or larger, or wind 58 mph or more), at least two separate observations were logged, and the day ranks among the most significant. A storm report that relays an airport weather station's reading (the same station, the same gust and the same time) counts once, as the station reading. Not every storm day gets a page; when one does, the page and the storm-day table show the same largest hail and strongest gust.
- Events (12-month counts): Events count the Idaho storm log: NWS warnings and Special Weather Statements (a lower-level NWS alert), storm reports (wind 50 mph+, hail 0.75 in.+), station gusts, NCEI entries and FEMA disaster declarations, for each county affected, floods included. One event is one place on one day, counted separately for each type (wind, hail, tornado, flood). A weather station or storm-report point counts once a day, at that day's highest reading, however many readings it filed; a place with hail and wind on the same day is two events. NWS warnings and Special Weather Statements count once per county per day, and NCEI entries and FEMA declarations once per place per day. A storm report that relays an airport weather station's reading (the same station, the same gust and the same time) counts once, as the station reading. The same report arriving through another feed (SPC or NCEI) is one record. The most impacted counties list uses this count. City pages count only wind and hail within 25 miles and leave out floods and Special Weather Statements, so city counts do not add up to the state total, and a city page's county count is a wind-and-hail count that is never higher than the same county's number here.
- NOAA history (since 2010): The official NOAA storm record (NCEI Storm Events) in Idaho from January 1, 2010 to the day before the 12-month window starts: hail 0.50 in.+, thunderstorm wind 40 mph+ and tornadoes. It is a separate, older record with its own "storm days" (days with any entry), so its counts are not compared with the 12-month numbers.
- Free Report Snapshot: A free YES/NO estimate for one address, from radar and wind analysis at the property rather than area reports, at the same screening thresholds: hail 0.75 in. or wind 45 mph.
Full method: Methodology and Data Sources.
Idaho hail and wind history in NOAA NCEI records, 2010–Oct. 2025
This section covers January 1, 2010 through October 20, 2025. Storms from October 21, 2025 on are in the 12-month summary above, so no date is counted in both.
NOAA's Storm Events Database holds 2,004 NCEI Storm Events entries in Idaho for this period, on 395 separate storm days. Wind is the more common entry — 1,522 thunderstorm wind reports to 442 hail reports.
Hail peaks in June (27% of all hail reports); thunderstorm wind peaks in July. December through February accounts for 4 storm days.
Storm days ranged from 14 in 2020 to 36 in 2024. Across 2022–2024, Idaho averaged 30 storm days a year, above the 15-year average of 24.
The largest hail in these records for Idaho was 2.75 in. (baseball size), reported in 2012, 2019 and 2022 — most recently on August 11, 2022 in Kootenai County. Hail of 2 inches or more appears in 7 different years of this record, the latest being 2022. Measured thunderstorm gusts topped out at 94 mph (Nez Perce County, August 29, 2017). NCEI also lists 40 tornado entries in Idaho — one entry per county a tornado crossed.
- Average: 24 storm days a year (2010–2024)
- June and August: 51% of all hail reports
- Most hail reports in one year: 76 in 2022
- Hail of 1 in. or larger reported in every full year, 2010–2024
| Year | Hail reports | Thunderstorm wind reports | Tornado entries | Storm days | Largest hail | Strongest measured gust |
|---|---|---|---|---|---|---|
| 2010 | 16 | 79 | 2 | 31 | 1.75 in. | 79 mph |
| 2011 | 10 | 40 | 2 | 22 | 2.00 in. | 83 mph |
| 2012 | 43 | 41 | 2 | 21 | 2.75 in. | 78 mph |
| 2013 | 21 | 50 | 6 | 29 | 1.75 in. | 87 mph |
| 2014 | 29 | 36 | 3 | 25 | 1.75 in. | 82 mph |
| 2015 | 31 | 48 | 1 | 22 | 2.00 in. | 76 mph |
| 2016 | 29 | 54 | 2 | 30 | 2.00 in. | 74 mph |
| 2017 | 17 | 46 | 1 | 21 | 1.75 in. | 94 mph |
| 2018 | 27 | 32 | 4 | 15 | 2.00 in. | 89 mph |
| 2019 | 23 | 81 | 5 | 30 | 2.75 in. | 72 mph |
| 2020 | 5 | 100 | 0 | 14 | 1.75 in. | 83 mph |
| 2021 | 22 | 106 | 0 | 16 | 1.50 in. | 79 mph |
| 2022 | 76 | 136 | 2 | 21 | 2.75 in. | 72 mph |
| 2023 | 56 | 250 | 8 | 32 | 1.75 in. | 79 mph |
| 2024 | 21 | 261 | 1 | 36 | 1.75 in. | 77 mph |
| 2025 through Oct. 20 | 16 | 162 | 1 | 30 | 1.75 in. | 79 mph |
Counties with the most NCEI storm reports, 2010–Oct. 2025
| County | All entries | Hail | Thunderstorm wind |
|---|---|---|---|
| Butte County | 174 | 5 | 168 |
| Jefferson County | 163 | 10 | 149 |
| Bonneville County | 120 | 28 | 91 |
| Bingham County | 118 | 12 | 101 |
| Cassia County | 103 | 13 | 85 |
| Fremont County | 92 | 18 | 72 |
| Bannock County | 87 | 31 | 56 |
| Ada County | 70 | 11 | 57 |
| Power County | 64 | 9 | 54 |
| Teton County | 58 | 3 | 55 |
Download this history: CSV · JSON at https://www.stormauditor.com/downloads/storm-history/id.json (free, open license, cite StormAuditor).
Source: NOAA NCEI Storm Events Database (thunderstorm wind, hail, and tornado entries; hail 0.50 in. or larger, wind 40 mph or more; wind converted from knots).
Idaho storm history questions, 2010–Oct. 2025
What is the largest hail reported in Idaho, 2010–Oct. 2025?
2.75 in., baseball size, reported in 2012, 2019 and 2022; most recently on August 11, 2022 in Kootenai County, per NCEI. Other years with hail of 2 inches or more: 2011, 2015, 2016 and 2018.
What was Idaho's most active storm year, 2010–Oct. 2025?
2024, with 36 storm days (21 hail reports, 261 thunderstorm wind reports, 1 tornado entry). The 15-year average is 24 storm days.
How often does Idaho get hail?
NCEI's records average 28 hail reports a year here over 2010–2024, alongside 91 thunderstorm wind reports. Hail of 1 inch or larger was reported in every one of those years.
When is hail season in Idaho?
June has the most hail reports (120, 2010–Oct. 2025), followed by August (105) and May (75).
How strong were measured thunderstorm winds in Idaho, 2010–Oct. 2025?
94 mph, measured on August 29, 2017 in Nez Perce County. Only gusts NCEI lists as measured count here; gusts measured on a date and county with a tornado entry, and entries of 120 knots or more (known entry errors), are left out.
For roofers, adjusters, and claim attorneys: the professional tools add statewide hail and wind swath maps, the Zone Canvas Tool, and Audit Reports with the evidence and arithmetic — see how roofing contractors and insurance claim attorneys use them.
Sources: NWS alerts (api.weather.gov) · NWS Local Storm Reports via the Iowa Environmental Mesonet · ASOS/AWOS station gusts via the Iowa Environmental Mesonet · NOAA NCEI Storm Events Database · every StormAuditor data source.
Download the Idaho dataset (free)
The full consolidated Idaho event list for the trailing 12 months — dates, counties, hazard types, severities, measured gusts and hail sizes, with coordinates; source records deduplicated, and each NWS warning product listed per affected county — downloads free and stays current with the live record: download CSV · JSON at https://www.stormauditor.com/downloads/storm-data/id.json. Free to reuse under the data license; the JSON file carries a field dictionary and provenance notes.
Research a specific Idaho address
Statewide counts tell you where activity concentrated; they do not tell you what happened at one property. For an individual address:
- Run the Free Report Snapshot — an instant YES/NO against StormAuditor's screening thresholds (wind ≥ 45 mph, hail ≥ 0.75 in., deliberately below the official NWS severe criteria).
- Use the Address Lookup for warnings, storm reports, and station observations at the address.
- Buy a full Weather Report for $2.99 covering every qualifying storm date at the address.
Browse day-by-day activity on the Storm Calendar (Pro plans and higher) or compare states on the Storm Data hub.
All values are derived from public NOAA and NWS data under StormAuditor's published methodology (see Limitations). Data last refreshed October 21, 2026.
See where recent storms tracked on the statewide Idaho hail map and wind map (the Hail and Wind Explorers, included with Pro+ and Organization plans), or check the county impact heatmap (free with an account).
Idaho cities A–Z: last reported hail
- Boise hail & wind history — last hail July 23, 2026 (1.00 in. reported)
- Meridian hail & wind history — last hail July 23, 2026 (1.00 in. reported)
- Nampa hail & wind history — last hail July 23, 2026 (1.00 in. reported)
Neighboring states: Montana storm data · Nevada storm data · Oregon storm data · Utah storm data · Washington storm data · Wyoming storm data
Guides for reading this data
Storm-day records in Idaho
The newest storm-date pages for Idaho cities: a report or station gust within 25 miles of the city met NWS severe criteria (hail 1.00 in.+ or wind 58 mph+), with at least two separate observations. Each page lists the reports, station gusts and a free way to check one address:
Cite or link to this data — free
Free to quote, summarize, reuse, and link — for bloggers, journalists, researchers, contractors, and AI writing tools. No permission or credit required. A ready-made citation and link are below if they help. Terms: StormAuditor data & content license.
Citation: StormAuditor. "Idaho Storm Data: Hail & Wind History Since 2010." Updated October 10, 2026. https://www.stormauditor.com/storm-data/id
HTML link: <a href="https://www.stormauditor.com/storm-data/id">Idaho Storm Data: Hail & Wind History Since 2010 — StormAuditor</a>
About this page: built by Storm Auditor LLC from public NOAA/NWS records — deduplicated warnings, storm reports, station measurements, and official records on a rolling 12-month window, under the published methodology. See the StormAuditor Editorial Team for how content is produced.
Read more: Recent Major Storm Days in Idaho: Hail and Wind History