Vera, Oklahoma

05/20/2013 0459 PM

Copan, Washington County.

Thunderstorm wind damage, reported by Post office.


            Large tree limbs downed




05/20/2013 0459 PM

Copan, Washington County.

Thunderstorm wind damage, reported by Post office.


            Large tree limbs downed





05/20/2013 0459 PM

Copan, Washington County.

Thunderstorm wind damage, reported by Post office.


            Large tree limbs downed





05/19/2013 1020 PM

5 miles NW of Copan, Washington County.

Hail e1.00 inch, reported by public.

... NWS damage survey for 05/20/2013 tornado event...

.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.

.Talala area tornado...

Rating: EF-1
estimated peak wind: 90-100 mph
path length /statute/: to be determined
path width /maximum/: to be determined
fatalities: 0
injuries: 0

Start date: may 20 2013
start time: to be determined
start location: to be determined
start lat/lon: to be determinded

End date: may 20 2013
end time: to be determined
end location: to be determined
end lat/lon: to be determined

Survey summary: this tornado was photographed by a number of
witnesses and apparently remained over open country for much of
its lifecycle to the northwest of Talala. However... the survey
team was able to get a preliminary assessment on this area today
just before sunset and did find one home that had been hit...
probably toward the end of the tornado lifecycle. This home had
roof damage... windows broken out... chimney torn off the roof and a
nearby metal framed barn damaged with Bay doors blown out on both
sides. This may have been the final tornado of several produced by
the storm that first produced a tornado south of Avant in Osage
County. Further surveys will be done in this area on Wednesday and
photos and video from spotters and chasers will be reviewed to
help finalize this portion of the event.

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.