Public Information Statement
Issued by NWS Oklahoma City, OK

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NOUS44 KOUN 232116 CCA

Public Information Statement...corrected...
National Weather Service Norman OK
358 PM CDT Mon Oct 23 2017

...Public Information Statement...

...NWS Damage Survey For 10/21/2017 Tornado Events...

.State Highway 9 tornado...

Rating:                 EF1
Estimated Peak Wind:    95 to 105 mph
Path Length /statute/:  3.5 miles
Path Width /maximum/:   200 yards
Fatalities:             0
Injuries:               0

Start Date:             10/21/2017
Start Time:             08:36 PM CDT
Start Location:         3 NW Goldsby / McClain County / OK
Start Lat/Lon:          35.18 / -97.51

End Date:               10/21/2017
End Time:               08:42 PM CDT
End Location:           3 S Norman / Cleveland County / OK
End Lat/Lon:            35.18 / -97.45

Summary: The tornado developed just northwest of State Highway 9 and
Santa Fe Avenue in the far east side of Newcastle. The tornado moved
east along State Highway 9 damaging businesses, trees and powerlines.
A large air conditioning unit was displaced at Riverwind Casino, and
a small area of damage occurred at the southeastern corner of the
hotel. The tornado crossed Interstate 35 and damaged businesses and
warehouses between Interstate 35 and the Canadian River.

Photographic evidence indicates this tornado crossed into Cleveland
County into far south Norman, primarily staying in inaccessible
areas south of neighborhoods and near the Canadian River south of
Highway 9 and west of Chautauqua Avenue, although some fence and
tree damage was noted. Photographs also suggest that at least a well-
developed funnel cloud continued east toward 12th Avenue Southeast
or Classen Boulevard, but the damage survey team found no tornadic
damage east of Chautauqua Avenue.

Damage was rated as high-end EF1 in McClain County, and EF0 in
Cleveland County.

.Seminole Tornado...

Rating:                 EF1
Estimated Peak Wind:    100 to 110 mph
Path Length /statute/:  2.0 miles
Path Width /maximum/:   150 yards
Fatalities:             0
Injuries:               0

Start Date:             10/21/2017
Start Time:             09:52 PM CDT
Start Location:         1 NW Seminole / Seminole County / OK
Start Lat/Lon:          35.24 / -96.69

End Date:               10/21/2017
End Time:               09:55 PM CDT
End Location:           1 ESE Seminole / Seminole County / OK
End Lat/Lon:            35.22 / -96.66

Summary: The first evidence of tornado damage was observed in
northwestern portions of Seminole along Foster Avenue. Significant
tree damage occurred at Maple Grove Cemetery in western Seminole
where the tornado was likely the strongest. The tornado continued
to move southeast across Seminole, including the northern and
eastern portions of the downtown area, producing damage to homes,
businesses, trees and power lines through town. At least two homes
suffered significant roof damage. The last observed damage was
south of Broadway Avenue in far southeastern Seminole.

Analysis will continue with both of these tornadoes as well as
other areas of tornado reports or damage elsewhere in Oklahoma
from Saturday evening.

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 200mph

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



Corrected grammar. No changes to tornado details. is the U.S. government's official web portal to all federal, state and local government web resources and services.