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NOUS41 KPBZ 180232
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PAZ021-029-031-073>076-180645-

Public Information Statement
National Weather Service Pittsburgh PA
1032 PM EDT Wed Aug 17 2016

...Tornado Confirmed Near Donora in Washington County/
Westmoreland County Pennsylvania...

Location...From Donora to near Webster in Washington/Westmoreland
           Counties
Date...Aug 17 2016
Estimated Time...241 - 243 PM EDT
Maximum EF-Scale Rating...EF0
Estimated Maximum Wind Speed...80 to 85 MPH
Maximum Path Width...250 yards
Path Length...1.0 mile
Beginning Lat/Lon...40.174N/79.866W
Ending lat/Lon...40.177N/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...
Based on a damage survey, radar data and video, the National
Weather Service in Pittsburgh PA has confirmed a tornado near
Donora in Washington County Pennsylvania on Aug 17 2016. The
tornado continued briefly across the Monongahela River into
Westmoreland County before dissipating.

Damage was found along a one-mile track through Donora, with the
most-concentrated damage found along 1st and 2nd Streets from
Allen to Waddell Avenues. In this area, a combination of healthy
and rotted hardwood trees were uprooted or snapped, and several
homes sustained damage to siding/flashing and experienced
uplift/removal of shingles or industrial roofing panels. Two
brick chimneys also appeared to have lost bricks in this area, and
several porch awnings were destroyed. Also in this vicinity, a
brick garage with an open door suffered a blown-out wall and
apparent displacement of the structure sufficient to cause the
its back wall to crack.

Farther downhill toward the river, the damage path became spottier
and exhibited a narrower width. Nevertheless, tree and limb
snappage was noted in this area, and buildings experienced
damage to siding and occasional removal of roofing panels. Tree
damage was noted on both banks of the Monongahela River, with the
last debris noted on the hillside just south of Webster in
Westmoreland County, between Webster Hollow Road and Turkey Hollow
Road.

While most damage likely was caused by wind of 60-70 mph, the
most-significant damage was consistent with maximal wind of 80-85
MPH, which corresponds to a rating of EF0 on the Enhanced Fujita
Scale.

The National Weather Service in Pittsburgh extends its thanks to
the Donora Fire Department, Mayor, Municipal Departments and
Police for their participation and contribution to this survey.

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

For reference...the Enhanced Fujita Scale classifies tornadoes
into the following categories:

EF0...wind speeds 65 to 85 mph.
EF1...wind speeds 86 to 110 mph.
EF2...wind speeds 111 to 135 mph.
EF3...wind speeds 136 to 165 mph.
EF4...wind speeds 166 to 200 mph.
EF5...wind speeds greater than 200 mph.

$$

Kramar/CL/MGT



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