HailHistory › Hail by county › Pennsylvania › Jefferson County
Pennsylvania · county FIPS 42065
Hail history for Jefferson County, PA
Jefferson County has 79 recorded hail events in the NOAA Storm Events Database — 34 of them 1″ or larger and 1 at 2″ or larger. The largest on record: 2.0″ (hen egg) on July 11, 1976.
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.
When it hails in Jefferson County
Recorded events by month, 1950–present. The amber bar marks Jefferson County's peak: May.
Most recent recorded events
| Date | Size | Comparable to |
|---|---|---|
| 1.0″ | Quarter | |
| 0.88″ | Nickel | |
| 0.88″ | Nickel | |
| 1.0″ | Quarter | |
| 1.0″ | Quarter | |
| 0.75″ | Penny | |
| 1.0″ | Quarter | |
| 0.75″ | Penny |
Looking for a specific storm? Use the did-it-hail date lookup for Jefferson County.
From the storm reports
Narratives as filed with the NOAA Storm Events Database (public records; lightly trimmed for length).
· 1.0″ (quarter)
Hail reported by a trained spotter.
· 1.75″ (golf ball)
A local citizen reported hail 1.75 inches in size. Dents to vehicles were also noticed.
· 1.75″ (golf ball)
Law enforcement reported golf ball size hail in Brockway.
Events by decade
| 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
|---|---|---|---|---|---|---|---|
| 0 | 2 | 3 | 2 | 10 | 16 | 33 | 13 |
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 Jefferson County
Has it ever hailed in Jefferson County?
Yes — 79 hail events have been recorded for Jefferson County, PA in the NOAA Storm Events Database since 1966, including 34 of 1″ (quarter size) or larger.
When did it last hail in Jefferson County?
The most recent recorded hail event for Jefferson County, PA is March 22, 2026, 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 Jefferson County?
2.0″ (hen egg), recorded on July 11, 1976. 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 Pennsylvania hail history
- Allegheny County 445
- Westmoreland County 291
- Erie County 204
- Butler County 201
- Lancaster County 192
- Crawford County 185
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.