Hail history for Dewey County, OK

Dewey County has 335 recorded hail events in the NOAA Storm Events Database — 190 of them 1″ or larger and 27 at 2″ or larger. The largest on record: 4.75″ (grapefruit) on May 15, 1990.

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 335 since 1956

1″ or larger 190 NWS severe threshold

2″ or larger 27 hen egg class and up

Largest recorded 4.75″ grapefruit · May 15, 1990

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 Dewey County

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

Most recent recorded events

Latest 8 of 335 recorded events · data through April 2026
Date	Size	Comparable to
April 17, 2026	1.25″	Half dollar
April 17, 2026	0.75″	Penny
March 6, 2026	2.0″	Hen egg
June 8, 2025	1.0″	Quarter
May 26, 2025	0.75″	Penny
May 13, 2024	0.75″	Penny
May 6, 2024	1.25″	Half dollar
May 6, 2024	1.75″	Golf ball

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

From the storm reports

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

April 17, 2026 · 0.75″ (penny)

The report was relayed through mPING.

April 1, 2015 · 2.75″ (baseball)

No damage reports.

June 9, 2005 · 3.0″ (tea cup)

Hail was an oblong stone which measured 2.5 inches by 3.5 inches. The large hail caused damage to vehicles along with damage to windows and roofs of homes. Tree limbs were also downed.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
6	11	7	58	86	95	55	17

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 Dewey County

Has it ever hailed in Dewey County?

Yes — 335 hail events have been recorded for Dewey County, OK in the NOAA Storm Events Database since 1956, including 190 of 1″ (quarter size) or larger.

When did it last hail in Dewey County?

The most recent recorded hail event for Dewey County, OK is April 17, 2026, with 1.25″ (half dollar) 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 Dewey County?

4.75″ (grapefruit), recorded on May 15, 1990. Hail that size is destructive-class and typically damages roofs, vehicles, and siding. 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 Oklahoma hail history

All 77 Oklahoma 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.