National Weather Service Raw Text Product

693 
NOUS44 KTSA 240238
PNSTSA
OKZ060-241445-

Public Information Statement
National Weather Service Tulsa OK
938 PM CDT Wed Oct 23 2019

...NWS DAMAGE SURVEY FOR 10/20-21/19 TORNADO AND THUNDERSTORM WIND
EVENT - UPDATE #1...

.UPDATE...Updated to upgrade Siloam Springs Tornado #2 to EF-2, and 
to add the Coweta and Scraper Oklahoma Tornadoes.

.OVERVIEW...At least four tornadoes developed on the leading edge of
a line of thunderstorms that moved through eastern Oklahoma and 
northwestern Arkansas during the late evening hours of Sunday, 
October 20th, and the early morning hours of Monday, October 21st. 
NWS Tulsa meteorologists surveyed storm damage in northern Adair 
County, across much of Benton County, in Wagoner County, and in
northern Cherokee County over the past three days. Details 
concerning the four tornadoes that have thus far been confirmed by 
NWS Tulsa from this event, as well as an area of damaging straight 
line wind, are noted in the summaries below.

Additional damage surveys for a small area of Muskogee County will 
likely be conducted later this week.

Coweta Oklahoma Tornado...

Rating:                 EF-1
Estimated Peak Wind:    85 to 90 mph
Path Length /Statute/:  7.2 miles
Path Width /Maximum/:   1100 yards
Fatalities:             0
Injuries:               0

Start Date:             October 20 2019 
Start Time:             1108 pm CDT
Start Location:         5 E Coweta / Wagoner County / OK
Start Lat/Lon:          35.9436 / -95.5608

End Date:               October 20 2019
End Time:               1115 pm CDT
End Location:           4.5 NW Wagoner / Wagoner County / OK
End Lat/Lon:            35.9928 / -95.4469

Survey Summary: A tornado developed just south of Highway 51 east of
Coweta and moved east-northeast damaging a home, and blowing down
trees and power poles. 

Scraper Oklahoma Tornado...

Rating:                 EF-1
Estimated Peak Wind:    85 to 95 mph
Path Length /Statute/:  2.9 miles
Path Width /Maximum/:   600 yards
Fatalities:             0
Injuries:               0

Start Date:             October 20 2019 
Start Time:             1139 pm CDT
Start Location:         6.7 WNW Scraper / Cherokee County / OK
Start Lat/Lon:          36.1189 / -94.9665

End Date:               October 20 2019
End Time:               1143 pm CDT
End Location:           4.1 NW Scraper / Cherokee County / OK
End Lat/Lon:            36.1211 / -94.9143

Survey Summary: A tornado uprooted trees and snapped numerous large
tree limbs.

Siloam Springs Arkansas Tornado #1...

Rating:                 EF-1
Estimated Peak Wind:    90 to 100 mph
Path Length /Statute/:  9.1 miles
Path Width /Maximum/:   900 yards
Fatalities:             0
Injuries:               0

Start Date:             October 21 2019 
Start Time:             1200 am CDT
Start Location:         5.7 NW Watts / Adair County / OK
Start Lat/Lon:          36.1410 / -94.6644

End Date:               October 21 2019
End Time:               1209 am CDT
End Location:           2.5 SE Siloam Springs / Benton County / AR
End Lat/Lon:            36.1666 / -94.5045

Survey Summary: A tornado developed over northeastern Adair County,
Oklahoma,  and moved east across the southern portion of the City of
Siloam Springs, Arkansas. This tornado uprooted numerous trees,
damaged homes, destroyed outbuildings, and snapped power poles.

.Siloam Springs Arkansas Tornado #2...

Rating:                 EF-2
Estimated Peak Wind:    110 to 120 mph
Path Length /Statute/:  31.4 miles
Path Width /Maximum/:   2640 yards
Fatalities:             0
Injuries:               0

Start Date:             October 21 2019 
Start Time:             1208 am CDT
Start Location:         0.8 SE Siloam Springs / Benton County / AR
Start Lat/Lon:          36.1778 / -94.5310

End Date:               October 21 2019
End Time:               1238 am CDT
End Location:           3.7 SE Avoca / Benton County / AR
End Lat/Lon:            36.3643 / -94.0224

Survey Summary: A second tornado appears to have formed on the north
side of Siloam Springs, as the first tornado was in the process of
dissipating on the south side of town. This tornado moved along 
Highway 412 in Siloam Springs, and then across the southern portion 
of the Siloam Springs Airport, as well as a housing subdivision east 
of the airport. The roof was blown off a business, many homes and 
businesses sustained roof damage, several hangars at the airport were
damaged, numerous trees were uprooted, and power poles were snapped.
The tornado became very large and moved east-northeast from the east
side of Siloam Springs. The roof of a wood-framed permanent home was
entirely removed, and a large, well-built, wood-framed outbuilding 
was destroyed on Andria Circle, which are the primary damage 
indicators that resulted in the EF-2 rating. These structures were on
a hill, and nearby hardwood trees were snapped, homes were damaged
with windows blown out and roof structures lifted off the frame of
the house and set back down. The tornado continued to move east-
northeast across Highfill and Cave Springs, and into Rogers. Numerous
homes were damaged, outbuildings were destroyed, many power poles 
were blown down, and numerous trees were uprooted. A metal building 
structure that was open-aired on the south side sustained severe 
damage. Businesses in the Pinnacle Hills area of Rogers were damaged.
From Rogers the tornado moved northeast, crossing inlets of Beaver 
Lake before dissipating. 

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

.Benton County Arkansas Thunderstorm Wind...

Peak Wind /E/ or /M/:   80 to 90 mph
Path Length /Statute/:  unknown
Path Width /Maximum/:   unknown
Fatalities:             1
Injuries:               0

Start Date:             October 21 2019 
Start Time:             1205 am CDT
Start Location:         Siloam Springs / Benton County / AR

End Date:               October 21 2019
End Time:               1240 am CDT
End Location:           Beaver Lake / Benton County / AR

Survey Summary: In addition to the two large tornado tracks that
occurred across northeastern Adair and Benton Counties, damaging 
straight-line wind was extensive generally to the south of the
tornado tracks. The damage was similar to the damage that occurred in
the nearby tornadoes, and was consistent with wind gusts of 80 to 90
mph: trees were uprooted, homes were damaged, power poles were blown
down, and outbuildings were destroyed. Straight-line wind uprooted a
tree onto a home near Beaver Lake, and killed the occupant.

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/TS/SRC/MDL