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Grassflat, PA Natural Disasters and Weather Extremes

 
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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.

Topics:Earthquake IndexVolcano IndexTornado IndexOther Weather Extremes EventsVolcanos NearbyHistorical Earthquake EventsHistorical Tornado Events

Earthquake Index, #2059

Grassflat, 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

Grassflat, 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, #2393

Grassflat, PA
50.36
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 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:

TypeCountTypeCountTypeCountTypeCountTypeCount
Avalanche:0Blizzard:2Cold:14Dense Fog:0Drought:6
Dust Storm:0Flood:246Hail:220Heat:4Heavy Snow:36
High Surf:0Hurricane:0Ice Storm:7Landslide:0Strong Wind:29
Thunderstorm Winds:1,122Tropical Storm:1Wildfire:0Winter Storm:21Winter Weather:0
Other:30 

Volcanos Nearby

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)DateMagnitudeStart Lat/LogEnd Lat/LogLengthWidthFatalitiesInjuriesProperty DamageCrop DamageAffected County
14.51985-05-31441°12'N / 78°04'W41°12'N / 77°57'W5.50 Miles3330 Yards0025.0M0Clinton
16.21985-05-31441°12'N / 77°57'W41°10'N / 77°52'W4.50 Miles3330 Yards0025.0M0Centre
18.81985-05-31441°11'N / 78°40'W41°12'N / 78°04'W30.00 Miles3330 Yards0025.0M0Clearfield
20.11975-06-05240°45'N / 77°55'W00250K0Centre
27.21991-09-18240°40'N / 77°49'W40°42'N / 77°47'W4.00 Miles330 Yards03250K0Huntingdon
29.81985-05-31441°10'N / 77°52'W41°13'N / 77°19'W29.00 Miles3330 Yards0025.0M0Clinton
30.11989-11-20240°37'N / 77°49'W40°39'N / 77°47'W3.50 Miles1230 Yards0025K0Huntingdon
31.11996-07-19240°43'N / 78°35'W40°39'N / 78°28'W8.40 Miles200 Yards0000Cambria
 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.
36.81980-06-09240°39'N / 78°39'W40°35'N / 78°32'W7.40 Miles33 Yards002.5M0Cambria
38.81952-07-23240°37'N / 77°34'W0425K0Mifflin
40.01996-07-19240°55'N / 78°55'W40°52'N / 78°48'W6.50 Miles200 Yards03200K10KIndiana
 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.
41.01963-09-03341°25'N / 78°44'W41°27'N / 78°34'W8.40 Miles100 Yards0202.5M0Elk
45.31996-07-19240°33'N / 78°45'W40°30'N / 78°39'W6.00 Miles100 Yards0000Cambria
 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.
46.31980-04-09240°44'N / 77°19'W40°43'N / 77°17'W00250K0Snyder
47.21954-06-12241°41'N / 78°11'W0.20 Mile67 Yards0025K0Potter
48.11985-05-31441°38'N / 78°42'W41°33'N / 78°30'W11.50 Miles1000 Yards000K0Elk


* 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.


 
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