Slippery Rock, PA Natural Disasters and Weather Extremes
Hot Rankings
The chance of earthquake damage in Slippery Rock is about the same as Pennsylvania average and is much lower than the national average. The risk of tornado damage in Slippery Rock is higher than Pennsylvania average and is about the same as the national average.
Earthquake Index, #1826
| Slippery Rock, PA | 0.01 |
| Pennsylvania | 0.17 |
| U.S. | 1.81 |
The earthquake index value is calculated based on historical earthquake events data using USA.com algorithms. It is an indicator of the earthquake level in a region. A higher earthquake index value means a higher chance of an earthquake.
Volcano Index, #1
| Slippery Rock, PA | 0.0000 |
| Pennsylvania | 0.0000 |
| U.S. | 0.0023 |
The volcano index value is calculated based on the currently known volcanoes using USA.com algorithms. It is an indicator of the possibility of a region being affected by a possible volcano eruption. A higher volcano index value means a higher chance of being affected.
Tornado Index, #499
| Slippery Rock, PA | 145.84 |
| Pennsylvania | 109.77 |
| U.S. | 136.45 |
The tornado index value is calculated based on historical tornado events data using USA.com algorithms. It is an indicator of the tornado level in a region. A higher tornado index value means a higher chance of tornado events.
Other Weather Extremes Events
A total of 4,726 other weather extremes events within 50 miles of Slippery Rock, PA were recorded from 1950 to 2010. The following is a break down of these events:
| Type | Count | Type | Count | Type | Count | Type | Count | Type | Count |
| Avalanche: | 0 | Blizzard: | 5 | Cold: | 13 | Dense Fog: | 0 | Drought: | 13 |
| Dust Storm: | 0 | Flood: | 690 | Hail: | 923 | Heat: | 7 | Heavy Snow: | 107 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 39 | Landslide: | 0 | Strong Wind: | 105 |
| Thunderstorm Winds: | 2,622 | Tropical Storm: | 1 | Wildfire: | 0 | Winter Storm: | 63 | Winter Weather: | 13 |
| Other: | 125 | ||||||||
Volcanos Nearby
No volcano is found in or near Slippery Rock, PA.
Historical Earthquake Events
No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Slippery Rock, PA.
No historical earthquake events found in or near Slippery Rock, PA.
Historical Tornado Events
A total of 63 historical tornado events that had recorded magnitude of 2 or above found in or near Slippery Rock, PA.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 5.9 | 1986-10-03 | 2 | 41°08'N / 80°14'W | 41°08'N / 80°02'W | 9.00 Miles | 123 Yards | 0 | 0 | 2.5M | 0 | Mercer |
| 14.5 | 1964-06-15 | 2 | 41°14'N / 80°14'W | 0 | 4 | 250K | 0 | Mercer | |||
| 15.2 | 1992-08-08 | 2 | 41°04'N / 80°21'W | 2.00 Miles | 150 Yards | 0 | 0 | 25K | 0 | Lawrence | |
| 15.3 | 1954-06-10 | 2 | 40°51'N / 80°11'W | 40°53'N / 80°10'W | 0 | 2 | 25K | 0 | Lawrence | ||
| 15.5 | 1981-07-20 | 2 | 40°51'N / 80°00'W | 0 | 0 | 250K | 0 | Butler | |||
| 16.0 | 1977-09-24 | 2 | 41°00'N / 80°21'W | 0 | 0 | 2.5M | 0 | Lawrence | |||
| 16.0 | 1954-06-01 | 2 | 41°18'N / 80°05'W | 0 | 3 | 3K | 0 | Mercer | |||
| 17.9 | 1954-06-01 | 2 | 40°55'N / 79°48'W | 40°57'N / 79°44'W | 3.00 Miles | 150 Yards | 0 | 0 | 25K | 0 | Butler |
| 19.0 | 1985-05-31 | 2 | 41°13'N / 79°48'W | 41°12'N / 79°41'W | 6.00 Miles | 150 Yards | 0 | 1 | 0K | 0 | Venango |
| 19.1 | 1985-05-31 | 5 | 41°12'N / 80°29'W | 41°13'N / 80°16'W | 12.00 Miles | 450 Yards | 8 | 60 | 250K | 0 | Mercer |
| 20.4 | 1954-06-10 | 2 | 40°45'N / 80°15'W | 40°51'N / 80°11'W | 7.30 Miles | 33 Yards | 0 | 1 | 25K | 0 | Beaver |
| 22.2 | 1992-08-08 | 2 | 41°06'N / 80°29'W | 1.50 Miles | 100 Yards | 0 | 11 | 250K | 0 | Lawrence | |
| 22.7 | 1985-05-31 | 3 | 40°49'N / 80°28'W | 40°47'N / 80°09'W | 17.00 Miles | 243 Yards | 3 | 40 | 25.0M | 0 | Beaver |
| 22.9 | 1985-05-31 | 3 | 40°47'N / 80°09'W | 40°43'N / 79°44'W | 22.00 Miles | 243 Yards | 6 | 80 | 25.0M | 0 | Butler |
| 23.8 | 2002-11-10 | 2 | 41°15'N / 80°28'W | 41°20'N / 80°21'W | 7.00 Miles | 500 Yards | 1 | 19 | 1.0M | 0 | Mercer |
| Brief Description: Starting about 7:54 PM, an F2 tornado touched down near Trout Island Road, east of Sharpsville. The tornado traveled northeast at 50 mph, crossed Route 18, then ripped into Clark. It crossed Shenango River Lake and tracked to New Hamburg, where it dissipated 8:02 PM. The tornado path was 7 miles long, about 500 yards wide at its maximum, in the town of Clark. Maximum winds estimated 155 mph. Majority of damage and all injuries occurred in Clark. Fifteen homes completely destroyed, 13 major damage, 29 had minor damage. One business destroyed; 1 suffered major damage. A large number of trees were snapped or toppled. Large truck was overturned. One van was thrown across Route 258. Several other vehicles were moved by the tornado or suffered considerable damage. Strongest tornado in Mercer county since May 31,1985. M81PH | |||||||||||
| 24.3 | 1985-05-31 | 5 | 41°10'N / 80°31'W | 41°12'N / 80°29'W | 2.00 Miles | 450 Yards | 0 | 0 | 250K | 0 | Mercer |
| 24.6 | 1954-09-30 | 2 | 41°15'N / 80°28'W | 0 | 0 | 25K | 0 | Mercer | |||
| 24.9 | 2001-04-09 | 2 | 41°02'N / 80°32'W | 41°02'N / 80°32'W | 4.00 Miles | 75 Yards | 0 | 0 | 200K | 0 | Mahoning |
| Brief Description: A weak F2 tornado touched down near Lowellville in eastern Mahoning County. The tornado had a intermittent damage path approximately four miles in length and 75 yards in width. Two homes, one business and two garages suffered significant damage with around a dozen other homes sustaining minor damage. | |||||||||||
| 25.2 | 1981-08-07 | 2 | 41°24'N / 79°51'W | 0 | 0 | 250K | 0 | Venango | |||
| 26.0 | 1985-05-31 | 5 | 41°10'N / 80°34'W | 41°10'N / 80°31'W | 3.00 Miles | 440 Yards | 0 | 0 | 250.0M | 0 | Trumbull |
| 28.7 | 1981-04-28 | 2 | 40°44'N / 79°44'W | 0.50 Mile | 33 Yards | 0 | 0 | 25K | 0 | Butler | |
| 29.1 | 1972-05-02 | 3 | 41°28'N / 80°13'W | 41°29'N / 80°12'W | 0 | 0 | 25K | 0 | Mercer | ||
| 30.1 | 1954-06-01 | 2 | 41°14'N / 79°33'W | 41°15'N / 79°30'W | 0 | 0 | 3K | 0 | Clarion | ||
| 30.3 | 1985-05-31 | 4 | 41°29'N / 80°25'W | 41°31'N / 79°56'W | 22.50 Miles | 350 Yards | 8 | 75 | 25.0M | 0 | Crawford |
| 30.8 | 1987-06-27 | 2 | 41°04'N / 80°39'W | 1.50 Miles | 40 Yards | 0 | 0 | 250K | 0 | Mahoning | |
| 31.1 | 1972-05-02 | 3 | 41°29'N / 80°12'W | 41°33'N / 80°04'W | 7.90 Miles | 33 Yards | 0 | 3 | 25K | 0 | Crawford |
| 31.6 | 2004-05-25 | 2 | 41°32'N / 80°10'W | 41°31'N / 80°03'W | 7.00 Miles | 50 Yards | 0 | 0 | 3.5M | 0 | Crawford |
| Brief Description: An F2 tornado touched down three miles west of Custards and then tracked east for seven miles. The tornado finally lifted just west of Cochranton near U.S Highway 322. The damage path was continuous, up to 50 yards in width and roughly parallel to State Route 285. Significant damage occurred along the damage path. At least ten homes were damaged with two large farm buildings destroyed. Two factories west of Custards along Delano Road were also heavily damaged. One factory lost over 16,000 square feet of roofing and had much of it's inventory destroyed. The second factory was also heavily damaged on one side. Twelve semi trailers parked outside this factory were overturned and destroyed. Several dozen workers inside the factories had sought shelter prior to the arrival of the tornado and were uninjured. Hundreds of trees and dozens of power poles were downed along the damage path. | |||||||||||
| 32.3 | 1956-08-05 | 3 | 41°08'N / 80°41'W | 41°07'N / 80°40'W | 2 | 0 | 250K | 0 | Mahoning | ||
| 33.3 | 1986-09-23 | 2 | 40°58'N / 79°26'W | 0.50 Mile | 40 Yards | 0 | 1 | 2.5M | 0 | Armstrong | |
| 33.3 | 1956-08-05 | 3 | 41°09'N / 80°42'W | 41°08'N / 80°41'W | 0 | 0 | 250K | 0 | Trumbull | ||
| 33.4 | 1956-05-12 | 2 | 40°37'N / 80°17'W | 0 | 0 | 250K | 0 | Beaver | |||
| 34.0 | 1967-07-24 | 2 | 40°49'N / 80°41'W | 40°49'N / 80°33'W | 6.50 Miles | 277 Yards | 0 | 2 | 250K | 0 | Columbiana |
| 34.4 | 1963-04-19 | 2 | 41°02'N / 80°52'W | 41°02'N / 80°34'W | 15.30 Miles | 33 Yards | 0 | 0 | 250K | 0 | Mahoning |
| 34.4 | 1955-03-01 | 3 | 41°16'N / 80°40'W | 2.50 Miles | 40 Yards | 1 | 6 | 250K | 0 | Mahoning | |
| 35.0 | 1980-06-03 | 4 | 40°39'N / 79°44'W | 40°37'N / 79°42'W | 1.90 Miles | 33 Yards | 0 | 20 | 250.0M | 0 | Allegheny |
| 35.3 | 1985-05-31 | 4 | 41°31'N / 79°56'W | 40°44'N / 78°50'W | 12.50 Miles | 350 Yards | 8 | 40 | 25.0M | 0 | Venango |
| 35.6 | 1985-05-31 | 4 | 41°29'N / 80°31'W | 41°29'N / 80°25'W | 7.00 Miles | 350 Yards | 0 | 5 | 25.0M | 0 | Mercer |
| 36.1 | 1978-06-07 | 2 | 41°09'N / 80°46'W | 41°10'N / 80°43'W | 0 | 0 | 2.5M | 0 | Trumbull | ||
| 37.2 | 1985-05-31 | 4 | 41°29'N / 80°31'W | 41°29'N / 80°31'W | 0.20 Mile | 300 Yards | 0 | 0 | 25K | 0 | Trumbull |
| 37.3 | 1985-05-31 | 2 | 40°53'N / 80°51'W | 40°50'N / 80°35'W | 15.00 Miles | 220 Yards | 0 | 20 | 25.0M | 0 | Columbiana |
| 38.7 | 1985-05-31 | 4 | 41°26'N / 79°31'W | 41°26'N / 79°28'W | 3.00 Miles | 350 Yards | 0 | 0 | 25.0M | 0 | Forest |
| 38.7 | 1952-01-17 | 2 | 41°36'N / 80°18'W | 0.50 Mile | 400 Yards | 0 | 0 | 250K | 0 | Crawford | |
| 39.1 | 1980-06-03 | 4 | 40°37'N / 79°42'W | 40°36'N / 79°33'W | 7.60 Miles | 33 Yards | 0 | 0 | 250.0M | 0 | Westmoreland |
| 39.4 | 1985-05-31 | 5 | 41°12'N / 81°02'W | 41°10'N / 80°34'W | 23.50 Miles | 440 Yards | 10 | 250 | 250.0M | 0 | Trumbull |
| 40.4 | 1976-02-16 | 2 | 41°04'N / 80°50'W | 1.50 Miles | 600 Yards | 0 | 0 | 250K | 0 | Mahoning | |
| 40.7 | 1985-05-31 | 4 | 41°33'N / 79°37'W | 41°31'N / 79°32'W | 4.00 Miles | 800 Yards | 0 | 0 | 0K | 0 | Venango |
| 40.7 | 1981-07-28 | 2 | 41°37'N / 79°46'W | 2.00 Miles | 33 Yards | 0 | 4 | 250K | 0 | Crawford | |
| 41.2 | 1996-07-19 | 2 | 41°05'N / 79°19'W | 41°04'N / 79°13'W | 7.50 Miles | 100 Yards | 0 | 0 | 25K | 5K | Clarion |
| Brief Description: A tornado began in Clarion County about 6 miles north of New Bethlehem. It tracked southeast into Jefferson County through Langville. The tornado lifted 1.5 miles west of Oliveburg. The tornado uprooted trees and rolled a mobile home, about a mile north of Truittsburg in Clarion County. The tornado also damaged some homes and farms, crops and downed extensive swaths of trees along its path. The tornado moved mainly in a straight line and averaged about 100 yards in width. | |||||||||||
| 42.4 | 1955-03-11 | 2 | 40°53'N / 80°50'W | 1.00 Mile | 100 Yards | 0 | 0 | 250K | 0 | Columbiana | |
| 42.8 | 1966-04-23 | 2 | 40°42'N / 79°24'W | 1.00 Mile | 17 Yards | 0 | 0 | 25K | 0 | Armstrong | |
| 43.2 | 1980-06-03 | 4 | 40°36'N / 79°33'W | 40°35'N / 79°30'W | 2.30 Miles | 33 Yards | 0 | 120 | 250.0M | 0 | Armstrong |
| 44.5 | 1985-05-31 | 2 | 41°39'N / 80°25'W | 41°41'N / 80°21'W | 4.00 Miles | 200 Yards | 1 | 0 | 0K | 0 | Crawford |
| 45.0 | 1978-10-12 | 3 | 40°48'N / 80°55'W | 40°53'N / 80°49'W | 7.30 Miles | 250 Yards | 0 | 4 | 2.5M | 0 | Columbiana |
| 45.7 | 1985-05-31 | 3 | 41°42'N / 80°09'W | 41°45'N / 79°44'W | 23.00 Miles | 277 Yards | 2 | 0 | 0K | 0 | Crawford |
| 46.0 | 1985-05-31 | 4 | 40°44'N / 78°50'W | 41°26'N / 79°31'W | 11.00 Miles | 350 Yards | 0 | 5 | 25.0M | 0 | Venango |
| 47.8 | 1996-07-19 | 2 | 41°04'N / 79°13'W | 40°59'N / 79°04'W | 2.50 Miles | 100 Yards | 0 | 0 | 25K | 5K | Jefferson |
| Brief Description: A tornado began in Clarion County about 6 miles north of New Bethlehem. It tracked southeast into Jefferson County through Langville. The tornado lifted 1.5 miles west of Oliveburg. The tornado uprooted trees and rolled a mobile home, about a mile north of Truittsburg in Clarion County. The tornado also damaged some homes and farms, crops and downed extensive swaths of trees along its path. The tornado moved mainly in a straight line and averaged about 100 yards in width. | |||||||||||
| 48.3 | 1975-06-04 | 2 | 40°35'N / 80°13'W | 40°11'N / 79°32'W | 45.30 Miles | 30 Yards | 0 | 0 | 0K | 0 | Beaver |
| 48.8 | 1985-05-31 | 3 | 41°43'N / 79°48'W | 41°45'N / 79°40'W | 8.00 Miles | 427 Yards | 0 | 0 | 2.5M | 0 | Crawford |
| 49.5 | 1956-05-13 | 2 | 40°22'N / 79°52'W | 0.70 Mile | 200 Yards | 0 | 5 | 250K | 0 | Allegheny | |
| 49.7 | 1985-05-31 | 3 | 41°31'N / 80°51'W | 41°33'N / 80°44'W | 6.00 Miles | 440 Yards | 0 | 10 | 2.5M | 0 | Ashtabula |
| 49.9 | 1955-07-01 | 2 | 41°45'N / 80°22'W | 41°46'N / 80°20'W | 0 | 0 | 25K | 0 | Crawford | ||
| 49.9 | 1951-06-27 | 2 | 40°35'N / 79°15'W | 40°52'N / 79°11'W | 19.70 Miles | 33 Yards | 0 | 0 | 3K | 0 | Armstrong |
| 49.9 | 1980-06-03 | 2 | 40°32'N / 79°28'W | 40°32'N / 79°22'W | 4.90 Miles | 33 Yards | 0 | 0 | 250K | 0 | Indiana |
* The information on this page is based on the global volcano database, the U.S. earthquake database of 1638-1985, and the U.S. Tornado and Weather Extremes database of 1950-2010.