Hail history for Lemhi County, Idaho
Every NOAA hail report filed in Lemhi County since 1966, with preliminary National Weather Service reports to November 3, 2026.
Readout · Lemhi County
- Last hail
- Aug 18, 2024
- 1.75 in, golf ball size
- Hail days, last 5 years
- 1
- since Nov 3, 2021 · 1 report
- Largest ever
- 1.75 in
- golf ball · Aug 18, 2024
32 reports on 20 days since 1966 · #11 of 45 Idaho counties
Hail map · Lemhi County
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
Roof damage after hail? Get a free inspection
Hail bruises shingles and cracks seals in ways you can't see from the ground, and most insurers set a claim deadline after the storm. The latest hail report in Lemhi County is from August 18, 2024. A local roofer can check and document it at no cost.
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What the record says about Lemhi County
The latest hail report in Lemhi County is from August 18, 2024, 1.75 in (golf ball size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 1.75 in on August 18, 2024.
Over the 20 years 2006–2025, Lemhi County logged 20 reports on 11 hail days, about 1.0 reports a year. That is about twice the median Idaho county (0.5 a year) and ranks #11 of 45 Idaho counties for all-time reports. Lemhi County holds 3% of all 1,140 hail reports in Idaho.
0% of reports with a size were 2 inches (hen egg) or larger, against 0% for the median Idaho county. The largest hail on record here is 1.75 in (golf ball) on August 18, 2024 near 0.48 E North Fork Cmmngs Ar.
Reports were down 67% in 2016–2025 (5) compared with 2006–2015 (15). The busiest year was 2009, with 4 reports on 1 day. Hail here peaks in August (66% of reports); 9% fall between April and June.
Reports a year 2006–2025 average
- Lemhi County 1.0
- Median Idaho county 0.5
Hail days 2006–2025
- Lemhi County 11
- Median Idaho county 8
Share 2 in or larger of sized reports
- Lemhi County 0%
- Median Idaho county 0%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 1 | 1 | |||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 1 | 1 | |||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Aug 18, 2024 | 1 | 1.75 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| Aug 18, 2024 | 1.75 ingolf ball | 0.48 E North Fork Cmmngs Ar | — | 15:16 local · NCEI |
| Aug 7, 2016 | 1.75 ingolf ball | (27u)salmon | — | 16:15 local · NCEI |
| Aug 7, 2016 | 1.75 ingolf ball | 14.38 NNE Ellis | $10K | 16:10 local · NCEI |
| Aug 6, 2009 | 1.75 ingolf ball | 3.98 ESE North Fork | $4K | 11:51 local · NCEI |
| Aug 6, 2009 | 1.75 ingolf ball | 5.41 NNE Carmen | — | 11:50 local · NCEI |
Size of every report
- Under 1 in 8 25%
- 1–2 in 24 75%
- 2 in + 0 0%
Most recent reports
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| Aug 18, 2024 | 1.75 ingolf ball | 0.48 E North Fork Cmmngs Ar | — | 15:16 local · NCEI |
| Aug 10, 2019 | 1.00 inquarter | 3.75 SE North Fork | — | 12:59 local · NCEI |
| May 26, 2018 | 1.00 inquarter | 2 SE North Fork | $2K | 14:09 local · NCEI |
| Aug 7, 2016 | 1.75 ingolf ball | (27u)salmon | — | 16:15 local · NCEI |
| Aug 7, 2016 | 1.75 ingolf ball | 14.38 NNE Ellis | $10K | 16:10 local · NCEI |
| Jul 14, 2014 | 0.75 inpenny | 1 NW Leadore | — | 13:10 local · NCEI |
| Aug 1, 2013 | 1.50 inping pong ball | 0.25 ENE Carmen | — | 13:24 local · NCEI |
| Aug 1, 2013 | 1.00 inquarter | 0.85 NE Salmon | $490K | 13:15 local · NCEI |
| Aug 1, 2013 | 1.50 inping pong ball | 3 ENE Carmen | $3K | 13:15 local · NCEI |
| Aug 1, 2011 | 1.00 inquarter | 0.49 W Shoup | — | 20:58 local · NCEI |
| Aug 6, 2009 | 1.75 ingolf ball | 3.98 ESE North Fork | $4K | 11:51 local · NCEI |
| Aug 6, 2009 | 1.00 inquarter | 3.98 ESE North Fork | — | 11:51 local · NCEI |
Cities and towns in Lemhi County
| Place | Reports | Largest |
|---|---|---|
| Salmon | 11 | 1.75 in |
Smaller places with fewer than 10 reports
These places have too few reports for a page of their own, so their record lives here.
| Place | Reports | Hail days | Latest |
|---|---|---|---|
| Leadore | 2 | 2 | Jul 14, 2014 |
Questions about hail in Lemhi County
How often does it hail in Lemhi County, Idaho?
32 hail reports have been logged in Lemhi County since 1966. Over the 20 years 2006–2025 that averages 1.0 reports a year. That ranks #11 of 45 Idaho counties by number of reports.
When is hail season in Lemhi County?
Most reports come in August, July, May. August alone accounts for 66% of all reports.
What is the largest hail recorded in Lemhi County?
1.75 in (golf ball size) on August 18, 2024 near 0.48 E North Fork Cmmngs Ar. 0% of reports here were 2 inches or larger.
When did it last hail in Lemhi County?
The most recent report in this data is from August 18, 2024 (1.75 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Lemhi County had in the last five years?
1 separate days with hail reports since November 3, 2021, adding up to 1 reports. The most recent was August 18, 2024.
Where does this hail data come from?
Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.