Hail history for Walla Walla County, WA

Walla Walla County has 21 recorded hail events in the NOAA Storm Events Database — 10 of them 1″ or larger. The largest on record: 1.75″ (golf ball) on June 6, 1991.

Records 1950–present Data through April 2026 Peak month May

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 21 since 1958

1″ or larger 10 NWS severe threshold

2″ or larger 0 hen egg class and up

Largest recorded 1.75″ golf ball · June 6, 1991

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 Walla Walla County

Recorded events by month, 1950–present. The amber bar marks Walla Walla County's peak: May.

Most recent recorded events

Latest 8 of 21 recorded events · data through April 2026
Date	Size	Comparable to
August 10, 2019	1.0″	Quarter
August 10, 2019	1.0″	Quarter
July 20, 2012	0.75″	Penny
July 13, 2012	1.0″	Quarter
July 13, 2012	1.0″	Quarter
June 23, 2012	1.25″	Half dollar
April 4, 2012	0.75″	Penny
May 31, 2011	1.0″	Quarter

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

From the storm reports

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

July 20, 2012 · 0.75″ (penny)

Radio operator was at the Table Rock Fire Lookout.

July 13, 2012 · 1.0″ (quarter)

Hail accompanied by heavy rainfall and wind to 40 mph.

June 23, 2012 · 1.25″ (half dollar)

Hail up to half dollar size accompanied by 60 mph winds wind shredded window screens.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
1	0	2	0	2	5	11	0

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 Walla Walla County

Has it ever hailed in Walla Walla County?

Yes — 21 hail events have been recorded for Walla Walla County, WA in the NOAA Storm Events Database since 1958, including 10 of 1″ (quarter size) or larger.

When did it last hail in Walla Walla County?

The most recent recorded hail event for Walla Walla County, WA is August 10, 2019, 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 Walla Walla County?

1.75″ (golf ball), recorded on June 6, 1991. 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 Washington hail history

All 39 Washington 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.