Alderson, OK

... NWS damage survey for 05/20/13 tornado event - update 2

.Update... This is an event summary with previously released information
concerning the tornadoes that occurred in eastern Oklahoma and northwest
Arkansas on may 20 2013. We will continue to evaluate information
over the coming days. At present the tornado count for this event in the
NWS Tulsa area of responsibility is eleven.

.Avant tornado...

Rating: EF-1
estimated peak wind: 100-110 mph
path length /statute/: 6.5 miles
path width /maximum/: 500 yards
fatalities: 0
injuries: 0

Start date: may 20 2013
start time: 351 PM CDT
start location: 5 SSW Avant / Osage County / OK

End date: may 20 2013
end time: 405 PM CDT
end location: 5.2 WNW Vera / Washington County / OK

Survey summary: numerous trees were snapped or uprooted. A home
was damaged by a large limb that fell onto its roof. This tornado
path is likely multiple tornadoes. Chaser video will be used to
determine how many segments may have occurred.

.Ramona tornado...

Rating: EF-1
estimated peak wind: 95-105 mph
path length /statute/: 4.5 miles
path width /maximum/: 400 yards
fatalities: 0
injuries: 0

Start date: may 20 2013
start time: 421 PM CDT
start location: 3 se Ramona / Washington County / OK

End date: may 20 2013
end time: 430 PM CDT
end location: 5.2 E Ramona / Washington County / OK

Survey summary: this tornado damaged a couple homes and snapped or
uprooted several trees.

.Talala tornado...

Rating: EF-1
estimated peak wind: 95 to 105 mph
path length /statute/: 6 miles
path width /maximum/: 500 yards
fatalities: 0
injuries: 0

Start date: may 20 2013
start time: 433 PM CDT
start location: 5.8 ENE Ramona / Washington County / OK

End date: may 20 2013
end time: 447 PM CDT
end location: 3.4 NNW Talala / Rogers County / OK

Survey summary: this tornado remained over open country for most
of its lifecycle. The rating is based on the single home that it
is known to have damaged and the nearby barn. The path length is
therefore an estimate based on radar data and the width will be an
estimate mainly based on chaser video.

.Wyandotte tornado 1...

Rating: EF-2
estimated peak wind: 115-125 mph
path length /statute/: 10 miles
path width /maximum/: 800 yards
fatalities: 0
injuries: 0

Start date: may 20 2013
start time: 625 PM CDT
start location: 4 N Fairland / Ottawa County / OK
start lat/lon: 36.8129 / -94.8461

End date: may 20 2013
end time: 640 PM CDT
end location: 4 NE Wyandotte / Ottawa County / OK
end lat/lon: 36.8298 / -94.6706

Survey summary: this tornado snapped or uprooted numerous trees
and damaged numerous homes. The most significant damage was
located near the area where the tornado crossed Highway 137 where
a metal building was severely damaged and several homes were
damaged. Many Hardwood trees were also snapped in that area.

.Wyandotte tornado 2...

Rating: EF-1
estimated peak wind: 100-110 mph
path length /statute/: 9.5 miles
path width /maximum/: 600 yards
fatalities: 0
injuries: 0

Start date: may 20 2013
start time: 632 PM CDT
start location: 2.8 NW Wyandotte / Ottawa County / OK
start lat/lon: 36.8128 / -94.7701

End date: may 20 2013
end time: 642 PM CDT
end location: 0.5 se Seneca / Newton County / MO
end lat/lon: 36.8359 / -94.6062

Survey summary: this tornado damaged several houses... damaged
barns or outbuildings... and snapped or uprooted a number of trees.
It dissipated over the south side of Seneca Missouri after
snapping or uprooting several trees as it crossed the state line
and crossed Highway 43. Several eyewitnesses north of Wyandotte saw
two tornadoes approaching from the west and radar data as well as
damage patterns support that conclusion. In addition... there was
lots of evidence of straight-line wind damage south of the
tornado paths as the Bow echo storm surged east as it approached
the state line.

.Proctor tornado...

Rating: EF-1
estimated peak wind: 95 to 105 mph
path length /statute/: 2 miles
path width /maximum/: 150 yards
fatalities: 0
injuries: 0

Start date: may 20 2013
start time: 632 PM CDT
start location: 1.7 se Proctor / Adair County / OK

End date: may 20 2013
end time: 634 PM CDT
end location: 2.8 E Proctor / Adair County / OK

Survey summary: this tornado uprooted trees and snapped a few
trees.

.Christie tornado...

Rating: EF-1
estimated peak wind: 100 to 110 mph
path length /statute/: 2.5 miles
path width /maximum/: 300 yards
fatalities: 0
injuries: 0

Start date: may 20 2013
start time: 635 PM CDT
start location: 2.5 SW Christie / Adair County / OK

End date: may 20 2013
end time: 637 PM CDT
end location: 1 NW Christie / Adair County / OK

Survey summary: this tornado snapped or uprooted trees and damaged
a barn.

.Westville tornado...

Rating: EF-1
estimated peak wind: 100 to 110 mph
path length /statute/: 8 miles
path width /maximum/: 500 yards
fatalities: 0
injuries: 0

Start date: may 20 2013
start time: 640 PM CDT
start location: 2.7 WSW Christie / Adair County / OK

End date: may 20 2013
end time: 647 PM CDT
end location: 1.6 N Cincinnati / Washington County / AR

Survey summary: this tornado destroyed two barns... damaged
another... and snapped or uprooted numerous trees.

.Siloam Springs Arkansas tornado...

Rating: EF-1
estimated peak wind: 85-90 mph
path length /statute/: 2.9 miles
path width /maximum/: 500 yards
fatalities: 0
injuries: 0

Start date: may 20 2013
start time: 649 PM CDT
start location: 1.8 NW Siloam Springs / Benton County / AR
start lat/lon: 36.2001 / -94.5690

End date: may 20 2013
end time: 654 PM CDT
end location: 2.5 NNE Siloam Springs / Benton County / AR
end_lat/lon: 36.2217 / -94.5263

Survey_summary: the tornado appeared to touchdown just inside the Arkansas
state line and travel east-northeast before turning more to the north and
dissipating. The tornado did minor damage to several homes and damaged
many trees. The tornado appeared strongest after the turn to the north
and while its width was diminishing. During this time it... downed
several very large trees in a cyclonic fashion. Widespread damaging
winds occurred in the Siloam Springs area with wind speeds near that of
the tornado... so the damage assessment was complicated. In addition...
we have seen social media images that suggest there was a funnel cloud more
directly over Siloam Springs. Given the widespread wind damage that was on
par with that of the tornado it has been difficult to directly tie damage
to The Funnel cloud picture... but we will continue to evaluate information.
The official record for this and all tornadoes is not submitted for 2 months
following the event.

.Beaver Lake Arkansas tornado...

Rating: EF-1
estimated peak wind: 90-95 mph
path length /statute/: 0.8 miles
path width /maximum/: 270 yards
fatalities: 0
injuries: 0

Start date: may 20 2013
start time: 724 PM CDT
start location: 7.5 se Prairie Creek / Benton County / AR
start lat/lon: 36.3200 / -93.9296

End date: may 20 2013
end time: 725 PM CDT
end location: 7.8 ESE Prairie Creek / Benton County / AR
end_lat/lon: 36.3300 / -93.9235

Survey_summary: the tornado damaged one home... several boat docks and
snapped many Oak trees. The tornado was embedded in a wide swath of
damaging winds.

.Cameron Oklahoma tornado...

Rating: EF-1
estimated peak wind: 85-90 mph
path length /statute/: 8.5 miles
path width /maximum/: 500 yards
fatalities: 0
injuries: 0

Start date: may 20 2013
start time: 844 PM CDT
start location: 5.1 SSW Cameron / Le Flore County / OK
start lat/lon: 35.0737 / -94.5888

End date: may 20 2013
end time: 855 PM CDT
end location: 3.6 ENE Cameron / Le Flore County / OK
end_lat/lon: 35.1538 / -94.4761

Survey summary: the tornado did minor damage to the roof of one home
and downed or damaged a number of trees. The damage in Poteau was the
result of straight-line winds that were the precursor to the tornado.
The Mobile home damaged near the end of the tornado path was most
likely damaged by wind.

Ef scale: the Enhanced Fujita scale classifies tornadoes into the
following categories.

EF0... weak... ... 65 to 85 mph
EF1... weak... ... 86 to 110 mph
EF2... strong... .111 to 135 mph
EF3... strong... .136 to 165 mph
EF4... violent... 166 to 200 mph
EF5... violent... >200 mph

Note:
the information in this statement is preliminary and subject to
change pending final review of the events and publication in NWS
storm data.