St. Marys Micro Area Natural Disasters and Weather Extremes
The chance of earthquake damage in St. Marys Area is about the same as Pennsylvania average and is much lower than the national average. The risk of tornado damage in St. Marys Area is lower than Pennsylvania average and is lower than the national average.
Earthquake Index, #778
| St. Marys Area | 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, #129
| St. Marys Area | 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, #646
| St. Marys Area | 80.14 |
| 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 10,436 other weather extremes events within 50 miles of St. Marys Area 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: | 8 | Cold: | 64 | Dense Fog: | 17 | Drought: | 64 |
| Dust Storm: | 0 | Flood: | 1,521 | Hail: | 1,682 | Heat: | 88 | Heavy Snow: | 373 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 50 | Landslide: | 0 | Strong Wind: | 276 |
| Thunderstorm Winds: | 5,827 | Tropical Storm: | 1 | Wildfire: | 1 | Winter Storm: | 109 | Winter Weather: | 59 |
| Other: | 296 | ||||||||
Volcanos Nearby
No volcano is found in or near St. Marys Area.
Historical Earthquake Events
No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near St. Marys Area.
No historical earthquake events found in or near St. Marys Area.
Historical Tornado Events
A total of 24 historical tornado events that had recorded magnitude of 2 or above found in or near St. Marys Area.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 0.5 | 1963-09-03 | 3 | 41°25'N / 78°44'W | 41°27'N / 78°34'W | 8.40 Miles | 100 Yards | 0 | 20 | 2.5M | 0 | Elk |
| 11.7 | 1985-05-31 | 4 | 41°38'N / 78°42'W | 41°33'N / 78°30'W | 11.50 Miles | 1000 Yards | 0 | 0 | 0K | 0 | Elk |
| 15.1 | 1985-05-31 | 2 | 41°37'N / 78°47'W | 41°40'N / 78°39'W | 7.00 Miles | 300 Yards | 0 | 0 | 0K | 0 | Mckean |
| 15.9 | 1985-05-31 | 2 | 41°35'N / 78°56'W | 41°37'N / 78°47'W | 10.50 Miles | 300 Yards | 0 | 0 | 0K | 0 | Elk |
| 16.4 | 1985-05-31 | 4 | 41°40'N / 78°50'W | 41°38'N / 78°42'W | 6.50 Miles | 1000 Yards | 4 | 40 | 0K | 0 | Mckean |
| 18.0 | 1985-05-31 | 2 | 41°34'N / 78°57'W | 41°35'N / 78°56'W | 1.50 Miles | 300 Yards | 0 | 0 | 0K | 0 | Forest |
| 19.4 | 1985-05-31 | 4 | 41°38'N / 78°56'W | 41°40'N / 78°50'W | 7.50 Miles | 1000 Yards | 0 | 0 | 0K | 0 | Mckean |
| 22.1 | 1985-05-31 | 4 | 41°11'N / 78°40'W | 41°12'N / 78°04'W | 30.00 Miles | 3330 Yards | 0 | 0 | 25.0M | 0 | Clearfield |
| 22.2 | 1985-05-31 | 4 | 41°38'N / 79°02'W | 41°38'N / 78°56'W | 3.50 Miles | 1000 Yards | 0 | 0 | 0K | 0 | Warren |
| 28.5 | 1976-07-11 | 2 | 41°19'N / 79°12'W | 40°58'N / 78°54'W | 28.70 Miles | 33 Yards | 1 | 7 | 250K | 0 | Jefferson |
| 30.1 | 1954-06-12 | 2 | 41°41'N / 78°11'W | 0.20 Mile | 67 Yards | 0 | 0 | 25K | 0 | Potter | |
| 30.2 | 1985-05-31 | 4 | 41°31'N / 79°32'W | 41°27'N / 78°56'W | 25.00 Miles | 800 Yards | 7 | 30 | 0K | 0 | Forest |
| 36.0 | 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 |
| 37.0 | 1985-05-31 | 4 | 41°12'N / 78°04'W | 41°12'N / 77°57'W | 5.50 Miles | 3330 Yards | 0 | 0 | 25.0M | 0 | Clinton |
| 37.6 | 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. | |||||||||||
| 38.0 | 1985-05-31 | 3 | 41°41'N / 79°29'W | 41°39'N / 79°09'W | 17.00 Miles | 800 Yards | 0 | 8 | 0K | 0 | Warren |
| 38.5 | 1996-07-19 | 2 | 40°55'N / 78°55'W | 40°52'N / 78°48'W | 6.50 Miles | 200 Yards | 0 | 3 | 200K | 10K | Indiana |
| Brief Description: A tornado touched down in Jefferson County and traveled southeast into northeast Indiana County, the tornado continued into the State Game Lands and exited Indiana County 4 miles north-north east of Glen Campbell and then entered Clearfield County. The tornado's path was 200 feet wide at its greatest width in Indiana County. Just some tree damage occurred in Jefferson County. The tornado strengthened and caused greater damage in Indiana County. Just east of Rossiter, the tornado tore the roof off of a barn. A child, playing outside, sought shelter in the barn. The roof lifted off and three of the four walls collapsed. The child was not injured. A horse that was inside the barn was sucked out and carried approximately 75 feet in the air into a field. The tornado traveled then traveled up a hill and significantly damaged one mobile home and destroyed a second. The second mobile home was carried at least 75 yards across a road and smashed against a row of trees. Three people were inside the mobile home and were injured, one critically. The tornado at this time was at it's strongest, at the upper end of F2. A nearby wood frame house was destroyed and dense areas of trees were felled or snapped. About a dozen homes sustained damage along the path, 5 were damaged extensively. Thirty pound cinder blocks from a garage were thrown approximately 300 yards up a nearby hill where a stronger suction vortex was noted. The tornado tracked into the State Game Lands and a 50 yard path of downed and twisted 100 to 150 foot trees was noted into the densely forested region. | |||||||||||
| 40.0 | 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. | |||||||||||
| 40.4 | 1962-06-14 | 2 | 41°46'N / 78°01'W | 0.20 Mile | 33 Yards | 0 | 0 | 3K | 0 | Potter | |
| 42.2 | 1985-05-31 | 4 | 41°12'N / 77°57'W | 41°10'N / 77°52'W | 4.50 Miles | 3330 Yards | 0 | 0 | 25.0M | 0 | Centre |
| 43.2 | 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 |
| 43.4 | 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 |
| 46.7 | 1961-05-15 | 3 | 42°06'N / 78°36'W | 42°06'N / 78°31'W | 3.00 Miles | 33 Yards | 0 | 0 | 250K | 0 | Cattaraugus |
| 46.9 | 1954-06-01 | 2 | 41°14'N / 79°33'W | 41°15'N / 79°30'W | 0 | 0 | 3K | 0 | Clarion | ||
* 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.