Grassflat, PA Natural Disasters and Weather Extremes
The chance of earthquake damage in Grassflat is about the same as Pennsylvania average and is much lower than the national average. The risk of tornado damage in Grassflat is lower than Pennsylvania average and is much lower than the national average.
Earthquake Index, #2059
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
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, #2393
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 1,738 other weather extremes events within 50 miles of Grassflat, PA were recorded from 1950 to 2010. The following is a break down of these events:
|Dust Storm:||0||Flood:||246||Hail:||220||Heat:||4||Heavy Snow:||36|
|High Surf:||0||Hurricane:||0||Ice Storm:||7||Landslide:||0||Strong Wind:||29|
|Thunderstorm Winds:||1,122||Tropical Storm:||1||Wildfire:||0||Winter Storm:||21||Winter Weather:||0|
No volcano is found in or near Grassflat, PA.
Historical Earthquake Events
No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Grassflat, PA.
No historical earthquake events found in or near Grassflat, PA.
Historical Tornado Events
A total of 16 historical tornado events that had recorded magnitude of 2 or above found in or near Grassflat, PA.
|Distance (miles)||Date||Magnitude||Start Lat/Log||End Lat/Log||Length||Width||Fatalities||Injuries||Property Damage||Crop Damage||Affected County|
|14.5||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|
|16.2||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|
|18.8||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|
|20.1||1975-06-05||2||40°45'N / 77°55'W||0||0||250K||0||Centre|
|27.2||1991-09-18||2||40°40'N / 77°49'W||40°42'N / 77°47'W||4.00 Miles||330 Yards||0||3||250K||0||Huntingdon|
|29.8||1985-05-31||4||41°10'N / 77°52'W||41°13'N / 77°19'W||29.00 Miles||3330 Yards||0||0||25.0M||0||Clinton|
|30.1||1989-11-20||2||40°37'N / 77°49'W||40°39'N / 77°47'W||3.50 Miles||1230 Yards||0||0||25K||0||Huntingdon|
|31.1||1996-07-19||2||40°43'N / 78°35'W||40°39'N / 78°28'W||8.40 Miles||200 Yards||0||0||0||0||Cambria|
|Brief Description: An F1 to weak F2 tornado touched down in Clearfield County near New Washington around 10:15 a.m. EST. The tornado moved southeast approximately 19 miles along a curved path crossing Five Points into Cambria County across Glendale Lake before ending 2 miles east of Frugality. This storm damaged several mobile homes and farms in Five Points, picked a boat out of the water on Glendale Lake and felled many trees along its path. A herringbone tree pattern was apparent along with suction vortex damage to crops.|
|36.8||1980-06-09||2||40°39'N / 78°39'W||40°35'N / 78°32'W||7.40 Miles||33 Yards||0||0||2.5M||0||Cambria|
|38.8||1952-07-23||2||40°37'N / 77°34'W||0||4||25K||0||Mifflin|
|40.0||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.|
|41.0||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|
|45.3||1996-07-19||2||40°33'N / 78°45'W||40°30'N / 78°39'W||6.00 Miles||100 Yards||0||0||0||0||Cambria|
|Brief Description: An F2 tornado touched down around 11:10 a.m. EST 2 miles east of Colver and tracked 6 miles southeast before ending 1 mile west of Loretto. The path width was 100 yards. Two homes and a barn were destroyed by this storm. Several roofs and a second barn were also damaged. A central suction vortex was visible in crop damage.|
|46.3||1980-04-09||2||40°44'N / 77°19'W||40°43'N / 77°17'W||0||0||250K||0||Snyder|
|47.2||1954-06-12||2||41°41'N / 78°11'W||0.20 Mile||67 Yards||0||0||25K||0||Potter|
|48.1||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|
* 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.