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Tornado History
Mercer Tornado History
This county-level tornado history page focuses on Mercer, Pennsylvania. The records below identify 24 tornadoes from 1954 through 2024, including a highest listed rating of F5 (Incredible damage). NOAA damage estimates in this group total at least $30.7M, with 9 deaths and 93 injuries recorded across the listed events.
Key Tornado Statistics
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Check any addressKey Tornado Facts for Mercer, Pennsylvania
Top local patterns from the historical tornado records in this group.
Average 0.3 tornadoes per year (0.4/yr in last decade)
May is the peak tornado month with 6 recorded events
Deadliest tornado: F5 in Mercer, Pennsylvania with 8 deaths
1985 was the most active year with 3 tornadoes
The 1980s had the most tornado activity (5 events)
Longest tornado: 12 miles in Mercer, Pennsylvania
Widest tornado: 500.0 yards in Mercer, Pennsylvania
Most tornadoes in one day: 3 on May 31, 1985
Monthly Distribution
Shows tornado frequency across months of the year, highlighting seasonal patterns and peak tornado periods.
Summary: In Mercer, Pennsylvania, May is the most active month with 6 tornadoes.
Annual Tornado Trend
Shows year-by-year tornado counts, making active years and quiet stretches easier to spot.
Summary: 1985 was the most active year with 3 recorded tornadoes.
Property Damage Trends
Visualizes reported property damage over time. Bars use a log-like scale so very large damage years do not flatten the rest of the chart.
Summary: The highest reported property damage year in this group is 1985 with at least $25.5M in NOAA-listed property damage.
Historical Track Sketch
Notable Tornado Records
The table highlights the strongest and most damaging records in this page's local dataset. Damage totals are NOAA-reported minimum estimates where available.
| Date | Rating | Area | Length | Width | Deaths | Injuries | Min. property damage |
|---|---|---|---|---|---|---|---|
| May 31, 1985 | F5 | Mercer, Pennsylvania | 12 mi | 450 yd | 8 | 60 | $250K |
| May 31, 1985 | F5 | Mercer, Pennsylvania | 2 mi | 450 yd | 0 | 0 | $250K |
| May 31, 1985 | F4 | Mercer, Pennsylvania | 7 mi | 350 yd | 0 | 5 | $25.0M |
| October 3, 1986 | F2 | Mercer, Pennsylvania | 9 mi | 123 yd | 0 | 0 | $2.5M |
| November 10, 2002 | F2 | Mercer, Pennsylvania | 7 mi | 500 yd | 1 | 19 | $1.0M |
| June 15, 1964 | F2 | Mercer, Pennsylvania | 0 mi | 400 yd | 0 | 4 | $250K |
| September 30, 1954 | F2 | Mercer, Pennsylvania | 0 mi | 33 yd | 0 | 0 | $25K |
| June 1, 1954 | F2 | Mercer, Pennsylvania | 0 mi | 3 yd | 0 | 3 | $2K |
| April 28, 2002 | F1 | Mercer, Pennsylvania | 10 mi | 200 yd | 0 | 0 | $750K |
| July 8, 2014 | EF1 | Mercer, Pennsylvania | 2.46 mi | 150 yd | 0 | 0 | $75K |
| August 2, 1980 | F1 | Mercer, Pennsylvania | 2 mi | 33 yd | 0 | 1 | $25K |
| January 8, 2019 | EF1 | Mercer, Pennsylvania | 2.8 mi | 400 yd | 0 | 0 | $5K |
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Source And Limits
Data source: NOAA/NCEI. TornadoTrace summarizes historical records for screening and research. Coordinates, damage estimates, narratives, and event details can be approximate, incomplete, revised, or missing. Do not use this page as legal, insurance, engineering, real estate, emergency management, or safety advice.