Tornado Confirmed Near Near Pine Bank in Greene County southwestern Pennsylvania

Location…Near Pine Bank in Greene County southwestern
Pennsylvania
Date…08/22/2017
Estimated Time…423 PM EDT
Maximum EF-Scale Rating…EF1
Estimated Maximum Wind Speed…105 MPH
Maximum Path Width…250 yards
Path Length…1.5 miles
Beginning Lat/Lon…39.7580N / -80.2871W
Ending lat/Lon…39.753N / -80.269W
* Fatalities…0
* Injuries…0

* The information in this statement is preliminary and subject to
change pending final review of the event(s) and publication in
NWS Storm Data.

…Summary…
The National Weather Service in Pittsburgh PA has confirmed a
tornado near Near Pine Bank in Greene County southwestern
Pennsylvania on 08/22/2017.

The tornado touched down on the border of Gilmore and Wayne
Townships along Holy Hill Road. Tree damage was observed with
several softwood trees snapped at the trunk. The tornado
continued to move east-southeast and took nearly the entire roof
off a house. It also ripped the deck completely off the house,
which was attached with metal straps. A piece of the deck became a
projectile and was driven into the windshield of a vehicle. The
winds also lifted up an approximately 35 pound battery in front of
a camper and placed it 20 yards across the property. The tornado
then continued down a valley toward Oak Forest Road where it
eventually lifted. In the valley numerous hardwood trees were
snapped at the trunk along with a few of them being uprooted.

The survey continued into northern parts of Monongalia county,
however no evidence was found of any tree damage south of the
town of Brave, PA.

Tornado Confirmed Near Rimersburg in Toby Township in Clarion County Western Pennsylvania

Location…near Rimersburg in Toby Township in Clarion County
western Pennsylvania
Date…July 11, 2017
Estimated Time…645 – 648 PM EDT
Maximum EF-Scale Rating…EF0
Estimated Maximum Wind Speed…75 MPH
Maximum Path Width…250 yards
Path Length…1 mile
Beginning Lat/Lon…41.077N / 79.566W
Ending lat/Lon…41.072N / 79.548W
* Fatalities…0
* Injuries…0

* The information in this statement is preliminary and subject to
change pending final review of the event(s) and publication in
NWS Storm Data.

…Summary…
The National Weather Service in Pittsburgh PA has confirmed a
tornado near Rimersburg in Toby Township in Clarion County in
Western Pennsylvania on July 11, 2017.

A damage path a found extending from Zanot Road east-southeastward to
the intersection of Cherry Run Road and Rimer Road to Fink Road in Toby
Township, roughly 4 miles northwest of Rimersburg. Observed damage was
exclusively to trees, with many examples of broken large limbs, trunk
snaps, and uproots of both healthy and unhealthy trees.

The most significant damage occurred during the early part of the track
along Zanot Road to its intersection with Cherry Run Road. It was here
that the greatest concentration of tree damage was found, with several
healthy trees snapped and uprooted. A convergent damage path was noted,
as opposed to a uniform or spreading direction, which suggested tornadic
activity. Further down the track, tree damage was less significant and
limited to smaller trees.

While tree damage was significant, especially in the first portion of the
track, the overall lack of damage to structures plus the antecedent wet
soils allows the wind speed to be capped at 75 MPH. Thus, the tornado has
been rated an EF0 on the Enhanced Fujita Scale.

Appreciation is extended to the Clarion County Office of Emergency Services
for their assistance in reporting and documenting the damage along the
survey path.

Tornado Confirmed Near Fombell to Lancaster Township in Beaver/Butler County Western Pennsylvania…July 10, 2017

 

Location…Fombell to Lancaster Township in Beaver/Butler County
Western Pennsylvania
Date…Jul 10, 2017
Estimated Time…357 – 401 pm EDT
Maximum EF-Scale Rating…EF0
Estimated Maximum Wind Speed…70 MPH
Maximum Path Width…75 yd
Path Length…3.2 mi
Beginning Lat/Lon…40.828N / 80.189W
Ending lat/Lon…40.842N / 80.131W
* Fatalities…0
* Injuries…0

* The information in this statement is preliminary and subject to
change pending final review of the event(s) and publication in
NWS Storm Data.

…Summary…
The National Weather Service in Pittsburgh PA has confirmed a
tornado near Fombell in Beaver County and into Lancaster Township in
Butler County in Western Pennsylvania on Jul 10, 2017.

A coherent, continuous swath of damage was discovered from near
Bowers Lane/North Camp Run Road in Fombell east-northeastward to
near the Strawberry Ridge Golf Course in Lancaster Township.
Damage was universally to trees, consisting of snapped large limbs
and trunk snappage or uproots of both healthy and unhealthy
trees.

At its most significant, the damage exhibited a rotationally-
convergent debris pattern consistent with a weak tornado as it
traversed a hillside through the golf course. Observers on the
golf course at the time of this storm event reported tree debris
being lofted and swirled cyclonically, which was consistent with
the debris pattern noted by the survey team. Although not an
accepted damage indicator, corn stalks just upstream from this
location also were laid over and exhibited a swirl pattern.

It should be noted that no structural damage was discovered at any
point through the survey path. This lack of damage to structures
enables the team to cap the storm’s estimated wind speed.

Farther to the northeast (at least as far as Eagle Mill Road and
Whitestown Road), a coherent, discontinuous damage swath was
noted, but lacked sufficient conclusive evidence to identify its
origin. It is entirely possible that this damage was an extension
of the tornado, but the debris was too sparse for any conclusions.

The survey team has concluded that a brief, weak tornado occurred
from near Bowers Lane through at least the Scott Ridge Road/
McNulty Lane area. The damage was consistent with a tornado of
peak wind speed of 60-70 mph, which yields a rating of EF0 on the
Enhanced Fujita Scale.

Appreciation is extended to the public for their assistance in
reporting and documenting the damage along the survey path.

Multiple Tornadoes Confirmed on June 23 2017

Tornado 1: Lone Pine Tornado

Location…Lone Pine in Washington County western Pennsylvania
Date…June 23 2017
Estimated Time…319 pm – 323 pm EDT
Maximum EF-Scale Rating…EF1
Estimated Maximum Wind Speed…90 MPH
Maximum Path Width…250 yd
Path Length…3.3 miles
Beginning Lat/Lon…40.104N / 80.171W
Ending Lat/Lon…40.101N / -80.115W
* Fatalities…0
* Injuries…0

* The information in this statement is preliminary and subject to
change pending final review of the event(s) and publication in
NWS Storm Data.

…Summary…
The National Weather Service in Pittsburgh PA has confirmed a
tornado near Lone Pine in Washington County western Pennsylvania
on June 23 2017.

Damage was first encountered near Potato Run Road and Friends Road,
where a swath of tree blowdown was noted. Large limbs were snapped,
and hardwood trees were snapped or uprooted in this area. The swath
continued uphill along Friends Road. Well-built structures did not
seem to suffer direct wind damage at this point of the path, which
narrowed and weakened upon surmounting the hill along Friends Road.

The circulation then widened and intensified as it crossed Chestnut
Ridge Road. Considerable damage to trees and structures was evaluated
near Brush Run Road and Frazee Road. In this area, large hardwood
and softwood trunks were snapped, entire trees were stripped of
their branches and shingles were removed from several homes. A
detached garage suffered uplift of a portion of its roof, and a
large, downwind-facing porch roof was removed from a home. Deck
furniture was lofted and blown into properties several homes down
crosswind.

The path continued east-southeastward across Sunedecker Road,
where trees were snapped or uprooted. Damage along the remainder
of the path thereafter appeared limited to trees. The path in this
area narrowed and exhibited damage consistent with weaker wind
speed, until points near Daniels Run Road and Robinson Road. At
that location, the track became less coherent, consistent with radar
imagery showing a surge of outflow, thus suggesting the end of the
tornadic phase of the storm.

Damage at the beginning of the track was consistent with wind
speed of around 90 mph, so the tornado has been rated EF1 on the
Enhanced Fujita Scale.

Appreciation is extended to Washington County Public Safety and
Emergency Management, and to the public and media for their
cooperation with the survey.


Tornado 2: Cheat Lake Tornado

Location…Cheat Lake in Monongalia County northern West Virginia
Date…June 23, 2017
Estimated Time…555 PM EDT
Maximum EF-Scale Rating…EF0
Estimated Maximum Wind Speed…85 MPH
Maximum Path Width…200 Yards
Path Length…475 Yards
Beginning Lat/Lon…39.660N / 79.853W
Ending Lat/Lon…39.661N / 79.848W
* Fatalities…0
* Injuries…0

* The information in this statement is preliminary and subject to
change pending final review of the event(s) and publication in
NWS Storm Data.

…Summary…
The National Weather Service in Pittsburgh PA has confirmed a
tornado near Cheat Lake in Monongalia County, northern West
Virginia on June 23, 2017.

Focus for damage was in the vicinity of Lakeside Marine and Crab
Shack Caribba. In this area, several docks and two pontoon boats
were thrown across the marina, with the two boats placed upside
down closer to the Crab Shack. Canopies from several of the
docks were strewn about, with one wrapped around power lines
behind the marina. Some damage to trees was observed, with large
branches snapped off of hardwoods and a few trees uprooted close
to the lake shore, and several more hardwood and softwood trees
snapped half-way up their trunks or uprooted moving eastward up the
hill toward Mont Chateau Estates.

Most of the damage to structures was from fallen trees, but a
portion of the roof of a small establishment next to the marina
and Crab Shack was ripped off and placed westward toward the
lake shore, opposite the storm track.


Tornado 3: Southern Monongalia Tornado

Location…Approximately 10 miles south of Morgantown in
Monongalia County West Virginia
Date…June 23 2017
Estimated Time…747 PM EDT
Maximum EF-Scale Rating…EF1
Estimated Maximum Wind Speed…95 mph
Maximum Path Width…75 yards
Path Length…250 yards
Beginning Lat/Lon…39.495N / 79.930W
Ending Lat/Lon…39.496N / 79.928W
* Fatalities…0
* Injuries…0

* The information in this statement is preliminary and subject to
change pending final review of the event(s) and publication in
NWS Storm Data.

…Summary…
The National Weather Service in Pittsburgh PA has confirmed a
tornado approximately ten miles south of Morgantown in Monongalia
County West Virginia on June 23, 2017.

Although there was sporadic damage about 350 yards to the
southwest on the opposite ridgeline, the focused path of
concentrated tree damage began along a valley and continued up to
the top of the next ridgeline. Several dozen hardwood trees were
uprooted, with isolated trees being snapped several feet high.
Toward the end of the path, the damage showed clear indications of
convergent rotation. Appreciation is extended to Monongalia
County Emergency Management for their cooperation with the survey
team.

Shippenville Tornado – 06/19/2017

…Tornado Confirmed Near Shippenville in Clarion County in
western Pennsylvania…

Location…Shippenville in Clarion County in western Pennsylvania
Date…06/19/2017
Estimated Time…552 PM EDT
Maximum EF-Scale Rating…EF0
Estimated Maximum Wind Speed…80 MPH
Maximum Path Width…60 Yards
Path Length…0.75 Miles
Beginning Lat/Lon…41.304N / -79.520W
Ending lat/Lon…41.305N / -79.509W
* Fatalities…0
* Injuries…0

* The information in this statement is preliminary and subject to
change pending final review of the event(s) and publication in
NWS Storm Data.

…Summary…
The National Weather Service in Pittsburgh PA has confirmed a
tornado near Shippenville in Clarion County western Pennsylvania
on 06/19/2017.

A weak tornado touchdown occurred Monday evening along
Millerstown Road in Elk Township Clarion county. There were
several reported sitings of a funnel cloud along with one person
confirming it reached the ground. The only structural damage was
to outbuildings and barns with sheet metal roofs. Hardwood trees
were used to determine the rating as numerous trees were uprooted
or snapped along the north side of Millerstown Road. The storm
tracked across Millerstown Road just east of the 598 postal
address and uprooted and snapped several additional trees before
lifting just prior to the reaching Pine City Road. This is the 5th
tornado to impact Clarion county so far this year. From 1950
through 2016 there were eight documented cases of tornadoes in
Clarion county, with the strongest being an EF2 on June 1st 1954
and July 19th 1996. The total number of tornadoes from 1950
through 2017 (so far) is 13. Additional severe weather history for
our region can be found at weather.gov/pittsburgh/torclimo

The National Weather Service would like to thank Clarion County
Office of Emergency Services for their assistance with this
survey.

Multiple Tornadoes Confirmed on 05/01/2017

OVERVIEW: A survey team on Saturday confirmed two additional
tornadoes in Clarion/Forest Counties in western Pennsylvania.
These two are in addition to the four previously confirmed in
Butler and Clarion Counties, bringing the total tornado count for
this storm event to six. This document summarizes the six
tornadoes that were surveyed in order by time of occurrence.


…Tornado Confirmed Near Prospect in Butler County in western
Pennsylvania…

Location…Prospect in Butler County western Pennsylvania
Date…05/01/2017
Estimated Time…230 pm to 231 pm EDT
Maximum EF-Scale Rating…EF0
Estimated Maximum Wind Speed…80-85 mph
Maximum Path Width…50 yards
Path Length…2.9 miles
Beginning Lat/Lon…40.911N / 80.076W
Ending lat/Lon…40.926N / 80.025W
* Fatalities…0
* Injuries…0

* The information in this statement is preliminary and subject to
change pending final review of the event(s) and publication in
NWS Storm Data.


…Summary…
The National Weather Service in Pittsburgh PA has confirmed a
tornado near Prospect in Butler County western Pennsylvania on
05/01/2017.

A focused, narrow path of tree damage was encountered beginning
along Portersville Road near Sechan Road. In this area, dozens of
hardwood and softwood trees were snapped or uprooted. Roofing
panels on a barn in this area were removed by the wind, and
paneling was removed from a trailer door. A home in this area that
sustained a near-direct hit by the tornado appears to have been
sheltered by surrounding trees and suffered only minor damage.

The tornado then moved through a mobile home community, where extensive
tree damage was encountered. Vehicle and mobile-home damage in the
Main Street and Douglas Street area appears to have been caused
predominantly by falling trees, although the wind did sweep out
foundational siding.

The tornado then weakened (with pockets of focused damage) while
it continued to the area of Grindle Road and Election House Road,
where modest damage was sustained at a greenhouse property. Among
other damage at this site, a large container was lofted and
transported several tens of feet over a greenhouse structure.

Several photographs of a tornado in this area have been appearing
on social media outlets, but as of this time, the NWS has not been
able to authenticate any of the photographs claiming to depict
this tornado. Appreciation is extended to Butler County Emergency
Management Agency, the public and news media for providing
important details to the survey team.


…Tornado Confirmed along Eldorado Road in Butler County…

Location…Eldorado Road in Butler County western Pennsylvania
Date…05/01/2017
Estimated Time…256 pm – 257 pm EDT
Maximum EF-Scale Rating…EF0
Estimated Maximum Wind Speed…65-70 mph
Maximum Path Width…50 yards
Path Length…0.4 miles
Beginning Lat/Lon…41.092N / 79.732W
Ending lat/Lon…41.097N / 79.729W
* Fatalities…0
* Injuries…0

* The information in this statement is preliminary and subject to
change pending final review of the event(s) and publication in
NWS Storm Data.

…Summary…
The National Weather Service in Pittsburgh PA has confirmed a
tornado near Eldorado Road in Butler County on 05/01/2017.

A NWS survey team encountered an unreported short, focused path of
concentrated tree damage along East Eldorado Road. Hardwood Trees
in this area were snapped or uprooted in a short and narrow
convergent path, consistent with a brief EF0 tornado.


…Tornado Confirmed near Wentlings Corners in Clarion County…

NOTE: This is a newly-confirmed tornado.

Location…Wentlings Corners in Clarion County in western Pennsylvania
Date…05/01/2017
Estimated Time…309 pm – 310pm EDT
Maximum EF-Scale Rating…EF0
Estimated Maximum Wind Speed…70-75 mph
Maximum Path Width…75 yards
Path Length…1 mile
Beginning Lat/Lon…41.189N / 79.553W
Ending lat/Lon…41.195N / 79.538W
* Fatalities…0
* Injuries…0


…Summary…
The National Weather Service in Pittsburgh PA has confirmed a
tornado near Wentlings Corners in Clarion County PA on 05/01/2017.

A survey team returned to Clarion County on Saturday to evaluate
additional damage reported to NWS Pittsburgh after the May 1
storms. Damage in the Wentlings Corners area appears to have
resulted from a combination of tornadic and non-tornadic wind. A
coherent path was discovered from near Route 338 and Canoe Ripple
Road to an area north of Tippecanoe Road and east of Wentlings
Corners Road.

The damage observed during the survey mainly was to trees,
although residents of the area have provided photographic evidence
of shingle removal from outbuildings and displaced items that are
not part of the set of official damage indicators used during
storm damage surveys. Structural damage that was identified to the
survey team appeared to have resulted indirectly from falling and
flying debris. Photographs provided via social media to the NWS
appear to depict a partial funnel cloud and rain curtains in the
area where damage was sustained.

Additional damage and extreme wind were reported in the area of
Huckleberry Ridge Road/Providence Church Road, but the team could
identify no coherent track in this area. Wind in this area
nevertheless likely reached damaging speed, but the lack of a
coherent track and radar imagery suggest that this wind likely was
associated with a localized surge in outflow to the east of the
tornadic portion of the storm.

This information is preliminary pending any additional data
provided to the NWS. Appreciation is extended to residents of the
Knox area, who provided the NWS with extensive damage
documentation and storm photographs that have helped the survey
team in its efforts.


…Tornado Confirmed along Route 36 in Clarion County…

Location…Route 36 in Clarion County in western Pennsylvania
Date…05/01/2017
Estimated Time…325 pm – 326pm EDT
Maximum EF-Scale Rating…EF0
Estimated Maximum Wind Speed…80 mph
Maximum Path Width…100 yards
Path Length…0.6 miles
Beginning Lat/Lon…41.331N / -79.255W
Ending lat/Lon…41.335N / -79.246W
* Fatalities…0
* Injuries…0

* The information in this statement is preliminary and subject to
change pending final review of the event(s) and publication in
NWS Storm Data.


…Summary…
The National Weather Service in Pittsburgh PA has confirmed a
tornado along Route 36 in Clarion County PA on 05/01/2017.

A NWS survey team encountered a focused path of concentrated tree
damage that began in the woods along Gravel Lick Road and
continued across Route 36 into a forested area. Toward the end of
the path, the damage width widened and showed clear indications
of convergent rotation. Dozens of softwood trees in this area were
snapped as the brief tornado raced northeastward. Appreciation is
extended to Clarion County Emergency Management for their
cooperation with the survey team.

 


…Tornado Confirmed in Cook Forest in Clarion County…

NOTE: The previous statement incorrectly referenced Allegheny
National Forest. The tornado occurred in Cook Forest State Park.

Location…Forest Road in Clarion County in western Pennsylvania
Date…05/01/2017
Estimated Time…327pm – 328pm EDT
Maximum EF-Scale Rating…EF0
Estimated Maximum Wind Speed…70-75 mph
Maximum Path Width…75 yards
Path Length…0.75 miles
Beginning Lat/Lon…41.331N / -79.224W
Ending lat/Lon…41.337N / -79.212W
* Fatalities…0
* Injuries…0

* The information in this statement is preliminary and subject to
change pending final review of the event(s) and publication in
NWS Storm Data.


…Summary…
The National Weather Service in Pittsburgh PA has confirmed a
tornado along Forest Road in Clarion County PA on 05/01/2017.

Amid widespread blowdown in the Cook Forest, a NWS survey team
evaluated a narrow damage path along Forest Road, where a focused,
concentrated swath of dozens of softwood trees was snapped or
uprooted.

A blown down assessment conducted by the Park Service reveals this
surveyed damage to be the end of a convergent damage swath that began
along Fire Tower Road. As the survey team was unaware of its existence
at the time, the damage along Fire Tower Road was not examined by the
survey team and does not factor in the the wind speed estimate/rating
above.

Damage along Forest Road was consistent with a tornado producing wind of
70-75 mph, so the tornado has been rated EF0 pending any additional
information.

 


…Tornado Confirmed near Newmansville in Clarion and Forest Counties…

NOTE: This is a newly-confirmed tornado.

Location…Pine Hollow Road in Clarion County to Guitonville Road in
Forest County in western Pennsylvania
Date…05/01/2017
Estimated Time…327 pm – 331pm EDT
Maximum EF-Scale Rating…EF1
Estimated Maximum Wind Speed…90-100 mph
Maximum Path Width…100 yards
Path Length…2.4 miles
Beginning Lat/Lon…41.408N / 79.355W
Ending lat/Lon…41.438N / 79.339W
* Fatalities…0
* Injuries…0

* The information in this statement is preliminary and subject to
change pending final review of the event(s) and publication in
NWS Storm Data.


…Summary…
The National Weather Service in Pittsburgh PA has confirmed a
tornado near Newmansville in Clarion and Forest Counties PA on
05/01/2017.

Two distinct, tornadic damage swaths seemingly associated with
one parent mesocyclone were discovered beginning along Pine Hollow
Road in northern Clarion County.

A survey team examined damage along Red Pine Circle and Pine
Hollow Road in northern Clarion County. The team discovered a
coherent, convergent track of tree damage that began in a field to
the west of Red Pine Circle and carved a focused swath through
trees at the northwestern corner of the Red Pine Circle loop.
Hardwood and softwood trees were snapped and uprooted in this
area, with damage sustained to several cabins from falling trees.
Nearly every tree within the 100 yd-wide swath sustained some
degree of damage.

To the south of the tornado track, additional tree damage was
discovered that is consistent with a broader swath of non-tornadic
wind. Sporadic, snapped large limbs and a few uproots were found
along the southern stretch of Red Pine Circle and the southern
portion of Pine Hollow Road.

A distinct track within the same parent mesocyclone crossed Pine
Hollow Road near Kerr Drive and continued to show sporadic damage
to trees into southern Forest County before weakening along
Guitonville Road in Green Township. Direct damage along the
entirety of the track appears to be predominantly to trees, with
extensive tree devastation encountered along Pine Hollow Road. In
this area, a section of forest was leveled/snapped, representing
the most-intense wind damage encountered in all surveys conducted
for this storm system. Clarion County officials informed the team
that the road had been closed for a prolonged period following the
storm.

Tree damage along this track’s extension on Kerr Drive and across
Carll Drive continued into the wooded area to the north. Damage
with some degree of concentration also was encountered along
Guitonville Road at the geographical northward extension of this
track. While the survey team was unable to traverse the wooded
area between these two damage points to confirm their continuity,
it appears most probable that an at-least discontinuous track of
tree damage connects the two points.

This information is preliminary pending any additional data
provided to the NWS. Appreciation is extended to residents of this
area for their cooperation with the survey team and for providing
geographical details and numerous photographs that assisted the
team in its effort.

This information can also be found on our website at
weather.gov/pittsburgh.