Hail history for Los Alamos County, NM

Los Alamos County has 37 recorded hail events in the NOAA Storm Events Database — 23 of them 1″ or larger and 1 at 2″ or larger. The largest on record: 2.0″ (hen egg) on July 10, 1961.

Records 1950–present Data through April 2026 Peak month July

Core sample · every recorded event, 1955–2026

Mark size = measured hail diameter; slivers are events with no recorded size. Amber ≥2″, red ≥2.75″ (baseball class). Denser recent decades partly reflect better reporting, not only more storms.

Recorded events 37 since 1961

1″ or larger 23 NWS severe threshold

2″ or larger 1 hen egg class and up

Largest recorded 2.0″ hen egg · July 10, 1961

Read the record honestly: Storm Events contains what was reported to the National Weather Service. Sparse or rural counties under-report, and coverage improved sharply after the mid-1990s — a quiet-looking stretch is not proof nothing fell.

When it hails in Los Alamos County

Recorded events by month, 1950–present. The amber bar marks Los Alamos County's peak: July.

Most recent recorded events

Latest 8 of 37 recorded events · data through April 2026
Date	Size	Comparable to
June 25, 2025	1.0″	Quarter
August 3, 2024	0.75″	Penny
July 2, 2024	0.88″	Nickel
May 11, 2024	0.75″	Penny
May 25, 2020	0.88″	Nickel
June 25, 2017	1.0″	Quarter
June 25, 2017	0.88″	Nickel
June 25, 2017	1.25″	Half dollar

Looking for a specific storm? Use the did-it-hail date lookup for Los Alamos County.

From the storm reports

Narratives as filed with the NOAA Storm Events Database (public records; lightly trimmed for length).

June 25, 2025 · 1.0″ (quarter)

Two different reports received of quarter size hail on the north side of Los Alamos.

October 12, 2012 · 1.5″ (ping-pong ball)

Newspaper report with images of significant hail damage to a mobile home in Los Alamos. Home owners reported hail was ping pong ball sized. Location is estimated from article giving home address. Time is estimated, based on radar imagery and other hail reports in the area. All images attached to this event are courtesy of the Los Alamos Daily Post newspaper.

July 6, 2009 · 1.75″ (golf ball)

Spotters and law enforcement reported golfball size hail in Los Alamos for at least 5 minutes.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	3	0	3	2	12	12	5

The climb across decades is largely a reporting story: spotter networks, radar, and digital filing pulled far more storms into the record after the 1990s.

Questions about hail in Los Alamos County

Has it ever hailed in Los Alamos County?

Yes — 37 hail events have been recorded for Los Alamos County, NM in the NOAA Storm Events Database since 1961, including 23 of 1″ (quarter size) or larger.

When did it last hail in Los Alamos County?

The most recent recorded hail event for Los Alamos County, NM is June 25, 2025, with 1.0″ (quarter) hail. The database is currently updated through April 2026, so a storm from the last few weeks may not appear yet. To check a specific day, use the did-it-hail date lookup.

What is the largest hail ever recorded in Los Alamos County?

2.0″ (hen egg), recorded on July 10, 1961. Hail that size meets or exceeds the National Weather Service severe threshold. See how big that really is on the actual-size hail chart.

Does a recorded hail event mean my roof was damaged?

No. This page reports storm records, not damage. Hail size and damage vary block by block within a county, and only an inspection can establish what happened to a specific roof. If you suspect damage, talk to your insurer or a licensed roofer — they can pull the same NOAA records for your claim.

More New Mexico hail history

All 33 New Mexico counties, ranked by recorded hail →

Source: NOAA/NCEI Storm Events Database, public domain, updated monthly by NCEI — this site's copy runs through April 2026. HailHistory reports records; it does not give insurance advice or assess damage.