Public Information Statement
Issued by NWS Tulsa, OK

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NOUS44 KTSA 130238
PNSTSA
ARZ001-002-010-011-019-020-029-OKZ049-053>076-131445-

Public Information Statement
National Weather Service Tulsa OK
938 PM CDT Fri May 12 2017

...NWS DAMAGE SURVEY FOR 05/11/17 TORNADO EVENT...

.OVERVIEW...NWS Tulsa meteorologists surveyed damage today from
storms that occurred during the afternoon and evening of Thursday
May 11th. Damage from a tornado on the east side of Owasso, and from
another southeast of Oologah, was assessed. The team surveyed the area
around Ramona where a brief tornado developed, but found no damage.
The path of a strong and persistent circulation that developed along
the leading edge of the squall line was also surveyed southwest of
Barnsdall to the south of Barnsdall. Only minor tree damage was found
in this area and no pattern could be discerned. The team also
surveyed damage on the northwest side of Claremore. Several large
trees were uprooted, large tree limbs were snapped, and power poles
were blown down around Heritage Hills Golf Course and Rogers State
University. The team wasn`t able to discern a pattern in this damage
area, and it was the result of a strong push of wind on the south
side of a circulation on the leading edge of a squall line.

.Owasso Oklahoma Tornado...

Rating:                 EF-1
Estimated Peak Wind:    90 to 100 mph
Path Length /Statute/:  1.5 miles
Path Width /Maximum/:   300 yards
Fatalities:             0
Injuries:               0

Start Date:             May 11 2017
Start Time:             201 pm CDT
Start Location:         4.2 NE Owasso / Rogers County / OK
Start Lat/Lon:          36.3040 / -95.7948

End Date:               May 11 2017
End Time:               208 pm CDT
End Location:           5.6 NE Owasso / Rogers County / OK
End Lat/Lon:            36.3114 / -95.7703

Survey Summary: A supercell thunderstorm rapidly developed near
Owasso. A tornado developed as the storm approached N 161st E Ave to
the south of 106th St N where tree limbs were snapped and barns were
damaged. The tornado moved northeast damaging the roofs of homes,
destroying outbuildings, uprooting trees, and blowing down power
poles between 106th St N and 109th St N. The tornado turned more east
at about N 173rd E Ave and then dissipated to the east of N 177th E
Ave.

.Oologah Oklahoma Tornado...

Rating:                 EF-1
Estimated Peak Wind:    100 to 110 mph
Path Length /Statute/:  3.1 miles
Path Width /Maximum/:   350 yards
Fatalities:             0
Injuries:               0

Start Date:             May 11 2017
Start Time:             227 pm CDT
Start Location:         5.4 SE Oologah / Rogers County / OK
Start Lat/Lon:          36.3775 / -95.6616

End Date:               May 11 2017
End Time:               233 pm CDT
End Location:           3.8 ESE Oologah / Rogers County / OK
End Lat/Lon:            36.4203 / -95.6476

Survey Summary: This tornado formed from the same supercell that
produced the Owasso tornado. The first apparent damage from this
tornado was on Northaven Road, north of the E 445 Road. From there,
the tornado moved north-northeast uprooting and snapping trees. It
crossed Highway 88 west of the N 4133 Road where large tree limbs
were snapped, and then dissipated north of Highway 88 where trees
were uprooted just south of Lake Oologah.

.Ramona Oklahoma Tornado...

Rating:                 EF-0
Estimated Peak Wind:    unknown
Path Length /Statute/:  brief
Path Width /Maximum/:   narrow
Fatalities:             0
Injuries:               0

Start Date:             May 11 2017
Start Time:             511 pm CDT
Start Location:         1.5 NE Ramona / Washington County / OK

End Date:               May 11 2017
End Time:               511 pm CDT
End Location:           1.5 NE Ramona / Washington County / OK

Survey Summary: KOTV helicopter filmed a brief tornado northeast of
Ramona. Our team surveyed the area today, and was unable to find any
damage. Thus, the tornado will be rated EF-0.

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.

$$

EJC/SFP



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