Public Information Statement
Issued by NWS Pittsburgh, PA

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NOUS41 KPBZ 152007
PNSPBZ
OHZ039-048-049-057-058-160815-

Public Information Statement
National Weather Service Pittsburgh PA
407 PM EDT Thu Sep 15 2022

...Final Assessment Summary of June 13-14 Derecho Damage in
Tuscarawas County Ohio...

.Overview...A derecho impacted a large part of eastern Ohio
overnight June 13, 2022 and crossed Tuscarawas County Ohio after
midnight on June 14. Locally extreme damage was found, likely
caused by wind speeds comparable to an EF2 tornado.

.Tuscarawas/Coshocton County Damage...

Peak Wind Estimated:    110-120 mph
Path Length /statute/:  At least 28 miles long
Path Width /maximum/:   At least 10 miles across
Fatalities:             0
Injuries:               0

Start Date:             June 14, 2022
Start Time:             12:05am EDT
Start Location:         Near Baltic, OH*
Start Lat/Lon:          40.443N / 81.763W

End Date:               June 14, 2022
End Time:               12:45am EDT
End Location:           Near Stillwater, OH*
End Lat/Lon:            40.319N / 81.256W

*Please note: start and end locations and path measurements
 correspond solely to the damage evaluated in Tuscarawas County
 surveys, and do not represent the actual beginning and ending of
 ALL damage from the June 13-14 derecho


At the request of Tuscarawas County Emergency Management, an
extensive damage survey was undertaken in the days following the
overnight derecho of June 13-14, 2022. This document formalizes
NWS Pittsburgh`s analysis and findings after a months- long review
of all available data.

Complete destruction of heavily forested areas was discovered
during ground and aerial surveys in several areas across
Tuscarawas County. Among the hardest-hit areas were Auburn, Bucks,
Jefferson and Clay Townships, including the towns of Stone Creek
and Gnadenhutten. Additional unreported tree damage was diagnosed
from post-storm satellite imagery, which helped to round out the
broad picture of the storm`s impacts.

Based on a thorough analysis of radar data, satellite data,
first-hand accounts from residents and damage reports, it appears
that damage across the county occurred from three distinct
processes, in close temporal succession:

1) An exceptionally strong rear-inflow jet (in excess of 100 mph)
was present and occasionally pulsing downward in more-intense
precipitation cores across the entire region over a ~45 min period

2) A macroburst driven by thermodynamic processes that led to a
larger, wide swath of EF1 (90-100 mph) damage across Auburn and
Bucks Townships, perhaps contributed to, in large part, by the
downward transport of momentum from the rear-inflow jet as the
downburst descended

3) A mesovortex which developed on the leading edge of storm
outflow and at the nose of the rear-inflow surge. The rotation-
induced wind, superimposed with the rapid forward motion of the
vortex, led to a narrow, elongated swath of damage consistent
with wind occasionally reaching 120 mph

The most significant destruction was evaluated near and ESE from
Stone Creek, where damage was consistent with wind approaching 120
mph. Most areas experiencing such complete arboreal devastation
were along hilltops with few, if any, structures, and had to be
surveyed using aerial and satellite technology. In one such area
where a home existed, the primary structure was heavily sheltered
and protected by trees, all of which were completely destroyed as
they absorbed the brunt of the wind.

Toward the end of the mesovortex-induced swath, a barn was
destroyed, young corn plants were toppled, and a nearby home
suffered modest damage (windows blown in and shingles/fascia
removed).

That property owner also provided a second-hand report of a
measured wind gust of 117 mph on a home sensor, but was unsure
where the measurement had been taken. Although the report is not
documented formally, it is consistent with some swaths of damage
surveyed, so warrants at least mention here in the event summary.

Wind exceeding 58 mph likely spanned at least a 10 mile-wide
swath from northern Coshocton County to western Harrison County
and beyond, the true bounds of which can only be estimated because
logistics preclude a precise diagnosis. Damage extended far to
the northwest into Holmes County (which WFO Cleveland curates),
and likely continued across the remainder of eastern Ohio, as the
storm caused notable damage on approach to Wheeling, WV.

This summary has focused only on the most extreme swath of damage
NWS Pittsburgh was made aware of, in Tuscarawas County, and does
not preclude or diminish the possibility of other damage
elsewhere.

A derecho is defined as a widespread, long-lived windstorm that is
associated with a band of rapidly moving showers and
thunderstorms. To be classified as a derecho, the storm system must
produce wind gusts in excess of 58 mph relatively continuously
along its path, and also must satisfy dimensional components
(traveling at least 240 miles, for example).

NWS Louisville offers an informational page on derechos at
www.weather.gov/lmk/derecho, and preliminary storm reports can be
viewed at www.spc.noaa.gov/climo/reports/220613_rpts.html

NWS Pittsburgh is grateful to the Tuscarawas County Emergency
Management Agency for its assistance in this damage documentation
effort over the last three-month period, to an intrepid resident
who provided numerous damage videos obtained with his drone
equipment, and to the numerous county residents who took the time
to speak and correspond with our teams to help broaden our
understanding of the scope of the storm`s impacts.

&&

NOTE:
The information in this statement is preliminary and subject to
change pending final review of the event and publication in NWS
Storm Data.

$$

Kramar/Bookbinder/Hefferan/Leonardi/Milcarek


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