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Cool and Dry in the East; Turning Stormy in the Northwest

Much cooler temperatures behind a cold front will bring a feeling of fall to the East Coast today. In addition, an active fall storm pattern developing in the Pacific Northwest this week will bring areas of heavy rain and high elevation snow. Northern California will benefit from rainfall this week that will aid firefighters given the recent large wildfires. Read More >

NWS
Survey
 

Overview

 

This is very preliminary information from damage surveys conducted on May 10, 2016. additional analysis will continue for these and other tornadoes that occurred on Monday, May 9, 2016, and some of the specific information may be modified as this analysis continues. This information is from a Public Information Statement that was issued by NWS Norman at 3:02 PM CDT on May 11, 2016.

Katie, Oklahoma Tornado
Rating: EF-4
Estimated Peak Wind: 166-175 MPH
Path length /Statute/: 9 Miles
Path width /Maximum/: To be determined
Fatalities: 1
Injuries: 0
Start date: May 9 2016
Start time: 406 PM CDT
Start location: 1.25 S Katie /Garvin County/ OK
End date: May 9 2016
End time: 427 PM CDT
End location: 8 E Katie /Garvin County/ OK
 

Survey Summary

 

The tornado developed about 1.25 miles south of Katie, or about 4 miles north of Hennepin, and moved generally east-northeast with some fluctuation in the motion. One fatality occurred east of Katie toward the end of the tornado path. The tornado dissipated just before crossing Interstate 35 about 8 miles east of Katie, or about 5 miles southwest of Wynnewood. A well-constructed home was destroyed about 6 miles east of Katie consistent with an EF-4 damage rating.

North of Sulphur, Oklahoma Tornado
Rating: EF-3
Estimated Peak Wind: 150-165 MPH
Path length /Statute/: 17 Miles
Path width /Maximum/: To be determined
Fatalities: 0
Injuries: To be determined
Start date: May 9 2016
Start time: 434 PM CDT
Start location: 4 NNW Davis /Murray County/ OK
End date: May 9 2016
End time: 517 PM CDT
End location: 2.5 SSW Roff /Pontotoc County/ OK
 

Survey Summary

 

The tornado touched down just east of U.S. Interstate Highway I-35 between Wynnewood and Davis and moved generally east, before turning east-northeast and dissipating near the Ponotoc/Murray County line between Roff and Hickory.

West of Roff, Oklahoma Anticyclonic Tornado
Rating: EF-1
Estimated Peak Wind: 100-110 MPH
Path length /Statute/: Up to 13 Miles
Path width /Maximum/: To be determined
Fatalities: 0
Injuries: To be determined
Start date: May 9 2016
Start time: 445 PM CDT
Start location: 6 NNW Sulphur /Murray County/ OK
End date: May 9 2016
End time: 520 PM CDT
End location: 4 NW Fitzhugh /Pontotoc County/ OK
 

Survey Summary

 

An anticyclonic tornado developed about 6 miles north-northwest of Sulphur and moved northeast into the southeast corner of Garvin County and then into western Pontotoc County. The tornado moved to at least a point 5 miles west-northwest of Roff with damage was likely associated with the tornado continuing northeast to 4 miles northwest of Fitzhugh.

Bromide, Oklahoma Tornado
Rating: EF-3
Estimated Peak Wind: 155-165 MPH
Path length /Statute/: 9 Miles
Path width /Maximum/: To be determined
Fatalities: 1
Injuries: To be determined
Start date: May 9 2016
Start time: 518 PM CDT
Start location: 4 S Connerville /Johnston County/ OK
End date: May 9 2016
End time: 536 PM CDT
End location: Bromide /Coal County/ OK
 

Survey Summary

 

The tornado developed near highway 99 about 4 miles south of Connerville, or about 12 miles west-northwest of Wapanucka, and moved east-northeast dissipating on the east side of Bromide on the Coal-Johnston county line. One fatality occurred at a home southeast of Connerville. The damage survey team indicated that the house damage southeast of Connerville was consistent with an EF-3 damage rating.

Northwest of Atoka, Oklahoma Tornado
Rating: EF-1
Estimated Peak Wind: 100-110 MPH
Path length /Statute/: 12 Miles
Path width /Maximum/: To be determined
Fatalities: 0
Injuries: To be determined
Start date: May 9 2016
Start time: 546 PM CDT
Start location: 12 WNW Atoka /Atoka County/ OK
End date: May 9 2016
End time: 619 PM CDT
End location: 5 N Atoka /Atoka County/ OK
 

Survey Summary

 

A tornado developed in northwest Atoka County about 12 miles west-northwest of Atoka, or about 6 miles east-northeast of Wapanucka. The tornado moved east-northeast crossing into southeastern Coal County to the south and southeast of Lehigh, then moved back into Atoka County to the north of Atoka with the last damage noted near the county line.

Northwest of Stillwater, Oklahoma Tornado
Rating: EF-2
Estimated Peak Wind: 115-125 mph
Path length /Statute/: 6 Miles
Path width /Maximum/: To be determined
Fatalities: 0
Injuries: To be determined
Start date: May 9 2016
Start time: 557 PM CDT
Start location: 9 SE Perry /Noble County/ OK
End date: May 9 2016
End time: 617 PM CDT
End location: 6 WSW Morrison /Noble County/ OK
 

Survey Summary

 

A tornado developed near or just northeast of Lake McMurtry and moved northeast across northwest corner of Payne County and back into Noble County southeast of Morrison. Two homes suffered significant roof damage and a mobile home was destroyed northeast of Lake McMurtry. Tree and power line damage continued along the duration of the path to the northeast.

Southeast of Bennington, Oklahoma Tornado
Rating: EF-2 in Bryan County
Estimated Peak Wind: 111-120 mph in Bryan County
Path length /Statute/: 2 Miles in Bryan County. 12.7 miles total.
Path width /Maximum/: 2500 yards in Bryan County
Fatalities: 0
Injuries: To be determined
Start date: May 9 2016
Start time: 624 PM CDT
Start location: 4.3 SE Bennington /Bryan County/ OK
End date: May 9 2016
End time: 627 PM CDT moved out of Bryan County
End location: 6 ESE Bennington moved out of Bryan County
 

Survey Summary

 

A tornado developed about 4 miles southeast of Bennington and quickly become very wide. The tornado produced very significant tree damage in eastern Bryan County before moving into Choctaw County at 627 PM CDT. The width was estimated to be 2500 yards wide as the tornado crossed into Choctaw County. Please see information from the National Weather Service Office in Tulsa for details of this tornado in Choctaw County.

 

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 event and publication in NWS Storm Data.