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.