Hail history in Boise, ID
On average, NOAA recorded hail within 15 miles of the center of Boise on 0.4 days a year from 2016 to 2025, 0.4 of them with hail 1 inch or larger. NOAA recorded hail within 15 miles of the center of Boise on 8 days since 2010. The largest hail reported was 1.5 in, in 2015. 8 of those days had hail of 1 inch or larger. April has the most hail days, 2 since 2010. The most recent was July 23, 2026. NOAA also recorded high wind on 30 days, with gusts up to 81 mph.
Ranks #152 of 200 US cities for days with hail 1 inch or larger, 2016 to 2025.
- Hail days since 2010
- 8
- Largest hail
- 1.5 in
- Highest gust
- 81 mph
Source: NOAA/NWS Storm Prediction Center
Data through November 1, 2026
8 hail days within 15 miles since 2010, largest 1.5 in
Source: NOAA/NWS Storm Prediction Center
Data through November 1, 2026
Hail days by year
Bar chart of hail days per year, 2010 to 2026. 8 hail days in total; the most was 2 in 2022.
Hail days by month
Hail days by month since 2010: Jan 0, Feb 0, Mar 1, Apr 2, May 1, Jun 1, Jul 1, Aug 1, Sep 1, Oct 0, Nov 0, Dec 0.
Most recent hail days
| Date | Largest hail | Nearest report |
|---|---|---|
| Jul 23, 2026 | 1.0 in | 3.3 mi |
| Apr 3, 2024 | 1.0 in | 3.7 mi |
| Aug 12, 2022 | 1.0 in | 11.6 mi |
| Jun 5, 2022 | 1.0 in | 14.0 mi |
| Mar 21, 2016 | 1.0 in | 14.3 mi |
| May 26, 2015 | 1.5 in | 14.2 mi |
| Sep 5, 2013 | 1.5 in | 11.2 mi |
| Apr 24, 2012 | 1.25 in | 10.6 mi |
About this data
- Distances are from the center of Boise, not from any one property. Look up a street address below for a single building.
- Reports come from trained spotters and the public, so they cluster near towns and roads.
- No report does not mean no hail. Hail can fall where no one is there to report it.
- This is not a damage or insurance assessment.
30 high-wind days within 15 miles since 2010, strongest gust 81 mph
Source: NOAA/NWS Storm Prediction Center
Data through November 1, 2026
Most recent high-wind days
| Date | Highest gust | Nearest report |
|---|---|---|
| Jul 23, 2026 | Not recorded | 5.4 mi |
| Jun 26, 2026 | Not recorded | 9.7 mi |
| May 28, 2026 | 72 mph | 0.2 mi |
| May 25, 2026 | 59 mph | 2.0 mi |
| Sep 2, 2024 | 63 mph | 0.8 mi |
| Jul 24, 2024 | 59 mph | 4.3 mi |
| May 28, 2024 | 60 mph | 1.8 mi |
| Jan 9, 2024 | 60 mph | 6.8 mi |
| Jun 13, 2023 | 63 mph | 4.9 mi |
| Jun 7, 2023 | 60 mph | 0.6 mi |
About this data
- Distances are from the center of Boise, not from any one property. Look up a street address below for a single building.
- Reports come from trained spotters and the public, so they cluster near towns and roads.
- No report does not mean no hail. Hail can fall where no one is there to report it.
- Wind speed is the highest reported gust; some reports have no speed.
- This is not a damage or insurance assessment.
Gusts, tornadoes and hurricanes in Boise
Estimated peak gusts
No day since October 1, 2021 had an estimated peak gust of 58 mph or more at Boise.
Estimates: the highest gust of each storm day in NOAA’s hourly 2.5 km wind analysis (URMA), which fills in between weather stations. Analyses like this smooth out short thunderstorm gusts, so they are best for widespread wind (hurricanes, winter storms, high wind days); for thunderstorm wind, NOAA’s wind reports are the better record. Not a measurement at any building.
Tornadoes within 10 miles
NOAA recorded 8 tornadoes whose path came within 10 miles of Boise since 1950; the strongest was rated EF1.
| Day | Rating | Path length | Closest |
|---|---|---|---|
| Aug 3, 2000 | EF0 | 0.1 miles | 3.1 miles |
| Aug 3, 2000 | EF0 | 0.1 miles | 6.8 miles |
| Aug 3, 2000 | EF0 | 4.7 miles | |
| May 10, 1998 | EF0 | 2 miles | 8.8 miles |
| Apr 20, 1997 | EF0 | 0.2 miles | 2.4 miles |
| Oct 26, 1984 | EF1 | 0.3 miles | 7.2 miles |
| Jun 2, 1967 | EF0 | 3.8 miles | 3.8 miles |
| Aug 23, 1956 | EF0 | 0.5 miles | 1.6 miles |
Source: NOAA/NWS Storm Prediction Center. Ratings before 2007 are on the original Fujita scale.
Hurricanes and tropical storms
No hurricane or tropical storm in NOAA's records brought modeled tropical-storm-force winds (39 mph) to Boise.
Modeled from NOAA’s best tracks for open, flat ground; not measurements. How we model hurricane winds
20 radar hail days within 15 miles since 2020, largest 2.5 in or more
Source: NOAA MRMS radar (MESH), from October 14, 2020. Estimates of the largest hail in each 1 km cell, not measurements.
10 days with radar hail 1 inch or larger, 1 at 2 inches or larger, within 15 miles of Boise’s center.
Biggest radar hail days
- 0.75 in+
- 1.0 in+
- 1.5 in+
- 2.0 in+
- 2.5 in+
- 3.0 in+
Most recent radar hail days
| Date | Largest radar estimate |
|---|---|
| Jul 23, 2026 | 1.5 in or more |
| Jul 16, 2026 | 1.25 in or more |
| Jun 26, 2026 | 1.25 in or more |
| Jul 31, 2025 | 0.75 in or more |
| Sep 11, 2024 | 0.75 in or more |
| May 22, 2024 | 0.75 in or more |
Storms in Boise
An NWS Boise technical paper says the Treasure Valley typically sees little severe thunderstorm activity, and when it does occur, it often comes as microburst winds from high-based storms.1 Ada County Emergency Management says the county averages one or two severe thunderstorms a year.2
Notable storms
- May 28, 2026Thunderstorm outflow winds hit the Treasure Valley, with a 72 mph gust measured east of Kuna and 68 mph at the Boise Airport.3,4
- September 5, 2019A microburst knocked down numerous trees in Southeast Boise from Broadway Avenue to Apple Street, some onto houses, and NWS Boise estimated the peak wind at 80 mph. Boise's assistant city forester estimated that more than 100 trees had significant damage, much of it around Gekeler Lane and Linden Avenue.5,6
- September 5, 2013Spotters reported hail up to 1.5 inches in Meridian and north of Eagle, and 1.75-inch hail 3 miles east-southeast of Nampa.7,8
- April 24, 2012A line of severe thunderstorms crossed southwest Idaho on the afternoon of April 24, 2012, and a trained spotter in Eagle reported 1.25-inch (half-dollar size) hail along with wind gusts to 75 mph.9
- August 21, 2010Winds above 65 mph blew over tents and ticket booths at the Western Idaho Fair in Boise, and about 70 people were treated for injuries. The Boise airport measured a 68 mph gust.2,10,11
- June 4, 2010The Boise airport measured a 59 mph thunderstorm gust. NWS employees found downed trees and fences along Surprise Valley Way in Southeast Boise, and Ada County's emergency manager reported power lines down in Southwest Boise and trees and traffic lights down in Garden City.12
Warnings and alerts
Ada County's Ada Alert system, launched in July 2026, sends severe weather and other emergency alerts by text, phone call or email for registered home and work locations.13
Sources
- 1. NWS Boise (Western Region Technical Attachment): Treasure Valley Idaho Severe Convection
- 2. Ada County Emergency Management: Severe Weather Spring
- 3. NOAA NCEI Storm Events Database: Thunderstorm Wind, Ada County, May 28, 2026
- 4. NOAA NCEI Storm Events Database: Thunderstorm Wind, Boise Airport, May 28, 2026
- 5. NOAA NCEI Storm Events Database: Thunderstorm Wind, Ada County, September 5, 2019
- 6. Idaho Statesman: Thunderstorm blows down large trees around Boise. More storms pack a punch Friday
- 7. NOAA Storm Prediction Center: Storm Reports for September 5, 2013 (filtered)
- 8. NOAA NCEI Storm Events Database: Hail, Ada County, September 5, 2013
- 9. NOAA NCEI Storm Events Database: Hail, Ada County, April 24, 2012
- 10. Idaho Press-Tribune: Western Idaho fair reopened at 1 p.m.
- 11. NOAA NCEI Storm Events Database: Thunderstorm Wind, Ada County, August 21, 2010
- 12. NOAA NCEI Storm Events Database: Thunderstorm Wind, Ada County, June 4, 2010
- 13. Ada County Sheriff's Office: Ada County Dispatch Launches New Public Alert System, Ada Alert, Amid Active Fire Season
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Questions about hail in Boise
Source: NOAA/NWS Storm Prediction Center
Data through November 1, 2026
- How often does it hail in Boise?
- NOAA recorded hail within 15 miles of the center of Boise on 0.4 days a year on average from 2016 to 2025, 0.4 of them with hail 1 inch or larger. Since 2010 it recorded 8 hail days.
- When is hail season in Boise?
- April has the most hail days within 15 miles of the center of Boise, 2 since 2010, then March (1) and May (1).
- What is the largest hail recorded in Boise?
- 1.5 in, in 2015: the largest hail NOAA recorded within 15 miles of the center of Boise since 2010.
- When did it last hail in Boise?
- NOAA's most recent hail report within 15 miles of the center of Boise is from July 23, 2026, with hail up to 1.0 in reported 3.3 miles from the center. Data through November 1, 2026.