Hail history for Los Alamos County, New Mexico
Every NOAA hail report filed in Los Alamos County since 1961, with preliminary National Weather Service reports to November 3, 2026.
Readout · Los Alamos County
- Last hail
- Jun 25, 2025
- 1.00 in, quarter size
- Hail days, last 5 years
- 4
- since Nov 3, 2021 · 4 reports
- Largest ever
- 2.00 in
- hen egg · Jul 10, 1961
37 reports on 23 days since 1961 · #25 of 33 New Mexico counties
Hail map · Los Alamos County
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
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What the record says about Los Alamos County
The latest hail report in Los Alamos County is from June 25, 2025, 1.00 in (quarter size). Since November 3, 2021 there have been 4 separate hail days; the biggest stones in that time were 1.00 in on June 25, 2025.
Over the 20 years 2006–2025, Los Alamos County logged 27 reports on 14 hail days, about 1.4 reports a year. That is 36% of the median New Mexico county (3.8 a year) and ranks #25 of 33 New Mexico counties for all-time reports. Los Alamos County holds 1% of all 5,335 hail reports in New Mexico.
3% of reports with a size were 2 inches (hen egg) or larger, against 3% for the median New Mexico county. The largest hail on record here is 2.00 in (hen egg) on July 10, 1961.
Reports were down 50% in 2016–2025 (9) compared with 2006–2015 (18). The busiest year was 2012, with 6 reports on 3 days. Hail here peaks in July (35% of reports); 41% fall between April and June.
Reports a year 2006–2025 average
- Los Alamos County 1.4
- Median New Mexico county 3.8
Hail days 2006–2025
- Los Alamos County 14
- Median New Mexico county 45
Share 2 in or larger of sized reports
- Los Alamos County 3%
- Median New Mexico county 3%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 1 | 1 | |||||||||||
| 2024 | 1 | 1 | 1 | 3 | |||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 1 | 1 | |||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 4 | 4 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jun 25, 2025 | 1 | 1.00 in | — |
| Aug 3, 2024 | 1 | 0.75 in | — |
| Jul 2, 2024 | 1 | 0.88 in | — |
| May 11, 2024 | 1 | 0.75 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jul 10, 1961 | 2.00 inhen egg | — | 16:00 local · NCEI |
| Jul 6, 2009 | 1.75 ingolf ball | 0.89 NW (Lam)los Alamos Airport | 12:10 local · NCEI |
| Jul 6, 2009 | 1.75 ingolf ball | 0.89 NW (Lam)los Alamos Airport | 12:00 local · NCEI |
| Jul 20, 1990 | 1.75 ingolf ball | — | 17:00 local · NCEI |
| Jul 13, 1990 | 1.75 ingolf ball | — | 17:30 local · NCEI |
Sizes filed before 1996 are often rough estimates (round numbers like 7.00 or 8.00 in) without an exact spot; they are shown as NOAA filed them.
Size of every report
- Under 1 in 14 38%
- 1–2 in 22 59%
- 2 in + 1 3%
Most recent reports
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| Jun 25, 2025 | 1.00 inquarter | 1.38 N (Lam)los Alamos Airport | — | 13:15 local · NCEI |
| Aug 3, 2024 | 0.75 inpenny | 1.82 N (Lam)los Alamos Airport | — | 15:15 local · NCEI |
| Jul 2, 2024 | 0.88 innickel | 0.89 SE (Lam)los Alamos Airport | — | 12:30 local · NCEI |
| May 11, 2024 | 0.75 inpenny | 0.89 SE Los Alamos | — | 13:06 local · NCEI |
| May 25, 2020 | 0.88 innickel | 1 WSW Los Alamos | — | 17:57 local · NCEI |
| Jun 25, 2017 | 0.88 innickel | Los Alamos | — | 14:32 local · NCEI |
| Jun 25, 2017 | 1.00 inquarter | 0.56 W Los Alamos | — | 14:32 local · NCEI |
| Jun 25, 2017 | 1.25 inhalf dollar | Los Alamos | — | 14:30 local · NCEI |
| Jun 25, 2017 | 0.88 innickel | 1.32 WNW Los Alamos | — | 14:24 local · NCEI |
| Oct 19, 2015 | 0.88 innickel | Los Alamos | — | 18:30 local · NCEI |
| Oct 19, 2015 | 0.88 innickel | Los Alamos | — | 18:15 local · NCEI |
| Oct 12, 2012 | 1.00 inquarter | (Lam)los Alamos Airport | $50K | 14:00 local · NCEI |
Cities and towns in Los Alamos County
| Place | Reports | Largest |
|---|---|---|
| Los Alamos | 35 | 2.00 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 |
|---|---|---|---|
| White Rock | 5 | 4 | Jul 30, 2009 |
Questions about hail in Los Alamos County
How often does it hail in Los Alamos County, New Mexico?
37 hail reports have been logged in Los Alamos County since 1961. Over the 20 years 2006–2025 that averages 1.4 reports a year. That ranks #25 of 33 New Mexico counties by number of reports.
When is hail season in Los Alamos County?
Most reports come in July, June, May. July alone accounts for 35% of all reports.
What is the largest hail recorded in Los Alamos County?
2.00 in (hen egg size) on July 10, 1961. 3% of reports here were 2 inches or larger.
When did it last hail in Los Alamos County?
The most recent report in this data is from June 25, 2025 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Los Alamos County had in the last five years?
4 separate days with hail reports since November 3, 2021, adding up to 4 reports. The most recent was June 25, 2025.
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.