Hail HistoryHome › Pennsylvania › Butler County › Slippery Rock
Hail history for Slippery Rock, PA
Hail has been reported within 10 miles of Slippery Rock on 22 days since 2006. The largest stones measured 2 in (hen egg) on Apr 14, 2024. Hail is most common here in May and June.
Recent hail near Slippery Rock
| Date | Hail size | Where |
|---|---|---|
| Oct 6, 2024 | 1 in quarter | Elora 1 hail report · closest 6 mi from Slippery Rock |
One row per day: the largest hail reported that day within 10 miles, the places and the number of reports.
Hail days near Slippery Rock by year
When hail season peaks near Slippery Rock
Of the 22 hail days since 2006, most fell in May (5) and June (4).
Largest hail storms near Slippery Rock
Apr 14, 2024 · 2 in (hen egg) · Hallston (3 mi from Slippery Rock)
National Weather Service description (English): Hail slightly larger than a golf ball reported along Route 173.Aug 19, 2011 · 1.5 in (ping pong ball) · Barkeyville (10 mi from Slippery Rock)
Aug 21, 2011 · 1.25 in (half dollar) · West Liberty (7 mi from Slippery Rock)
Nov 14, 2011 · 1.25 in (half dollar) · Grove City (7 mi from Slippery Rock)
Mar 13, 2006 · 1 in (quarter) · Slippery Rock (0 mi from Slippery Rock)
Tornadoes within 10 miles of Slippery Rock
| Date | Rating | Where |
|---|---|---|
| Jun 14, 2026 | EF1 | Park View 7 mi from Slippery Rock |
| Jun 14, 2026 | EF1 | West Liberty 6 mi from Slippery Rock |
| Jun 14, 2026 | EF0 | Elora 6 mi from Slippery Rock |
| May 21, 2025 | EF0 | Fisher Hgts 10 mi from Slippery Rock |
| Aug 10, 2015 | EF0 | Euclid 9 mi from Slippery Rock |
Damaging thunderstorm winds near Slippery Rock
128 reports of damaging thunderstorm wind within 10 miles of Slippery Rock since 2006, on 78 days. The strongest measured gust was 62 mph on May 1, 2017.
| Date | Strongest gust | Where |
|---|---|---|
| Sep 3, 2026 | damage reported | Slippery Rock, West Sunbury 4 wind reports |
| Aug 23, 2026 | damage reported | Grove City 1 wind report |
| Aug 8, 2026 | damage reported | Harrisville 1 wind report |
| Jul 21, 2026 | damage reported | Slippery Rock 1 wind report |
| Jul 3, 2026 | damage reported | Portersville, Grove City 4 wind reports |
| Jun 20, 2026 | 58 mph, estimated | Grove City, Forestville 2 wind reports |
| Jun 14, 2026 | 85 mph, estimated | Grant City, Park View, Euclid 8 wind reports |
| Mar 31, 2026 | 58 mph, estimated | North Liberty 1 wind report |
| Jun 28, 2025 | 58 mph, estimated | Barkeyville 1 wind report |
| Jun 27, 2025 | 58 mph, estimated | Princeton 1 wind report |
Severe thunderstorm wind means gusts of 58 mph or more, or wind that caused damage. Measured gusts come from weather stations; estimated ones from spotters and damage surveys.
Filing a roof or car hail claim?
Insurers ask for the date of loss. The dates on this page are when hail was reported near Slippery Rock; hail can hit one street and miss the next, so a report is not proof of damage at your address. A licensed roofer or your insurance adjuster can inspect the roof. Many policies set a time limit for filing a claim — check yours.
Nearby cities
- New Castle
31 hail days - Hermitage
28 hail days - Cranberry Township
37 hail days - Youngstown
47 hail days - Boardman
41 hail days - Franklin Park
40 hail days - Allison Park
46 hail days - Austintown
48 hail days
Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then). Distances are measured from the center of Slippery Rock.
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