National Weather Service Weather Forecast Office

Severe thunderstorms and several tornadoes raked much of eastern Oklahoma and portions of northwest Arkansas during the afternoon and evening hours of Monday, May 10th.  Hailstones as large as baseballs were reported, and numerous tornadoes were sighted across portions of Osage County and along the I-40 corridor from Okfuskee County eastward to Sequoyah County.

The severe thunderstorm event was a well advertised one, with data showing several days in advance that many factors would come together to create a potentially dangerous weather situation across much of the Southern Plains during the afternoon and evening hours of the 10th.  The morning of the 10th began with cool, cloudy, and drizzly conditions across much of the area.  As a strong upper level storm system moved out of the Rockies, a warm front began to lift to the northeast across the area, bringing warmer and more unstable conditions to the region.  A surface low also organized in southwest Kansas and moved to the east near the Oklahoma/Kansas border during the day.  A dryline pushed eastward from the Texas Panhandle into central Oklahoma by that evening.

Thunderstorms began to develop rapidly early in the afternoon across portions of northern Oklahoma and into Kansas to the west of Interstate 35.  The storms quickly became tornadic as they raced to the east and northeast.  One storm moved into western portions of Osage County, causing damage near Fairfax.  Toward mid to late afternoon, thunderstorms gradually began to develop further to the south along the Interstate 35 corridor in central Oklahoma.  One storm produced significant damage in the Oklahoma City metro area before moving to the east along the Interstate 40 corridor.  The storm produced several tornadoes in Okfuskee, Okmulgee, McIntosh, Muskogee, and Sequoyah counties.  Other storms during the evening also affected parts of southeast Oklahoma before moving out of the region.

 

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Data

Tornado Tracks: Hail Reports: Wind Reports:

Download Tornado Tracks KML File

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Damage Survey Information

National Weather Service Tulsa employees have conducted surveys of damage across Osage County and also along the Interstate 40 corridor to determine how many tornadoes affected the area and the path length, width, and tornado strength of each.  Updated information will be posted here.

 

The tracks from the May 10th event are still considered preliminary and may be modified based on additional information that may become available to us.  Anyone with information that could enhance the record of these storms should contact the National Weather Service Office in Tulsa at 918-838-7838 during business hours or send us an email at: sr-tsa.stormreport@noaa.gov

 

...OKFUSKEE COUNTY OKLAHOMA...

A TORNADO THAT MOVED ACROSS PORTIONS OF NORTHERN HUGHES
COUNTY...INCLUDING THE TOWN OF CROMWELL...CROSSED INTO
SOUTHWESTERN OKFUSKEE COUNTY 3 MILES WEST OF BEARDEN AT ABOUT 635
PM CDT. THE TORNADO MOVED NORTHEAST AND DISSIPATED JUST SOUTH OF
I-40 ABOUT 3 MILES NORTH OF BEARDEN AT ABOUT 647 PM CDT. MANY
TREES WERE DAMAGED IN THE PATH...WHICH WAS ABOUT 5 MILES LONG AND
HAD A MAXIMUM WIDTH OF 400 YARDS. BASED ON THE TREE DAMAGE...THE
TORNADO WAS RATED EF-1 ON THE ENHANCED FUJITA SCALE WITH MAXIMUM
WIND OF UP TO 95 MPH.

ANOTHER TORNADO DEVELOPED ABOUT 6.5 MILES SOUTH OF OKEMAH AT ABOUT
645 PM. THE TORNADO MOVED NORTHEAST AND DISSIPATED ABOUT 2.75
MILES NORTH-NORTHWEST OF PHAROAH AT ABOUT 710 PM. TREES WERE
SNAPPED...POWER POLES WERE DOWNED...HOMES WERE DAMAGED AND SEVERAL
OUTBUILDINGS WERE DESTROYED WITHIN THE 14 MILE LONG PATH THAT WAS
A MAXIMUM OF 1000 YARDS WIDE. BASED ON THIS DAMAGE...THE TORNADO
WAS RATED EF-1 ON THE ENHANCED FUJITA SCALE WITH PEAK WINDS NEAR
105 MPH.

A THIRD TORNADO BEGAN ABOUT A MILE SOUTH OF BOLEY AT ABOUT 717
PM...MOVED NORTHEAST...AND DISSIPATED ABOUT 10.5 MILES NORTH-
NORTHEAST OF OKEMAH AT ABOUT 735 PM. THE TORNADO PRODUCED
SIGNIFICANT TREE DAMAGE...REMOVED THE ROOF OF THE BOLEY POLICE
DEPARTMENT BUILDING...DOWNED POWER POLES...AND DAMAGED HOMES. THE
PATH LENGTH WAS ABOUT 15.5 MILES LONG AND HAD A MAXIMUM WIDTH OF
650 YARDS. THE TORNADO WAS RATED EF-1 ON THE ENHANCED FUJITA SCALE
WITH PEAK WINDS NEAR 105 MPH.

Okfuskee County Summary

CONTINUATION OF CROMWELL TORNADO IN HUGHES COUNTY
BEGAN: 3 MILES WEST OF BEARDEN
ENDED: 3 MILES NORTH OF BEARDEN
635 PM TO 647 PM CDT
RATING: EF-1
PEAK WINDS: NEAR 95 MPH
PATH LENGTH IN OKFUSKEE COUNTY: 5 MILES
MAX PATH WIDTH IN OKFUSKEE COUNTY: 400 YARDS

CLEARVIEW TORNADO
BEGAN: 6.5 MILES SOUTH OF OKEMAH
ENDED: 2.75 MILES NORTH-NORTHWEST OF PHAROAH
645 PM TO 710 PM CDT
RATING: EF-1
PEAK WINDS: NEAR 105 MPH
PATH LENGTH: 14 MILES
MAX PATH WIDTH 1000: YARDS

BOLEY TORNADO
BEGAN: 1 MILE SOUTH OF BOLEY
ENDED: 10.5 MILES NORTH-NORTHEAST OF OKEMAH
717 PM TO 735 PM CDT
RATING: EF-1
PEAK WINDS: NEAR 105 MPH
PATH LENGTH: 15.5 MILES
MAX PATH WIDTH: 650 YARDS

...OKMULGEE COUNTY OKLAHOMA...

A BRIEF TORNADO DEVELOPED A HALF MILE NORTHEAST OF BRYANT...MOVED
EAST...AND DISSIPATED ABOUT A MILE EAST-NORTHEAST OF BRYANT. THE
TORNADO DAMAGED TREES AND A HOME. THE PATH LENGTH WAS ABOUT A HALF
MILE LONG AND WAS UP TO ABOUT 100 YARDS WIDE. IT WAS RATED EF-0
ON THE ENHANCED FUJITA SCALE WITH PEAK WINDS NEAR 80 MPH.

A STRONG TORNADO DEVELOPED AT ABOUT 704 PM ABOUT 3 MILES SOUTH-
SOUTHWEST OF THE HENRYETTA AIRPORT...MOVED NORTHEAST...AND
DISSIPATED AT ABOUT 721 PM ABOUT 2 MILES NORTHEAST OF DEWAR. THE
TORNADO DESTROYED A BOAT DOCK AND A MOBILE HOME ON HENRYETTA
LAKE...DAMAGED SEVERAL OTHER HOMES AND MOBILE HOMES...PRODUCED
MAJOR TREE DAMAGE...A DESTROYED OUTBUILDINGS. THE PATH LENGTH WAS
ABOUT 10 MILES AND WAS UP TO 1250 YARDS WIDE. THE TORNADO WAS
RATED EF-2 ON THE ENHANCED FUJITA SCALE WITH PEAK WINDS NEAR 115
MPH.

Okmulgee County Summary

BRYANT TORNADO
BEGAN: 0.5 MILES NORTHEAST OF BRYANT
ENDED: 0.75 MILES EAST-NORTHEAST OF BRYANT
703 PM CDT
RATING: EF-0
PEAK WINDS: NEAR 80 MPH
PATH LENGTH: 0.5 MILES
MAX PATH WIDTH: 300 YARDS

LAKE HENYRETTA TORNADO
BEGAN: 3 MILES SOUTH SOUTHWEST OF HENRYETTA AIRPORT
ENDED: 2 MILES EAST NORTHEAST OF DEWAR
704 PM TO 721 PM CDT
RATING: EF-2
PEAK WINDS: NEAR 115 MPH
PATH LENGTH: 10 MILES
MAX PATH WIDTH: 1250 YARDS

...MCINTOSH COUNTY OKLAHOMA...

 

EUFAULA LAKE TORNADO
723 PM TO 741 PM
BEGAN: SOUTH OF LAKE EUFAULA ABOUT 6.5 MILES SOUTHWEST OF HITCHITA
ENDED: 7 MILES EAST OF HITCHITA, NORTH-NORTHEAST OF HIGHWAY 72/HIGHWAY 266 INTERSECTION
PATH LENGTH: 13 MILES
MAX PATH WIDTH: 800 YARDS
EF RATING: EF2 WITH PEAK WINDS NEAR 115 MPH

RENTIESVILLE TORNADO
746 PM TO 756 PM
BEGAN: 1.5 MILES SOUTHEAST OF RENTIESVILLE
ENDED: 7 MILES EAST-NORTHEAST OF RENTIESVILLE
PATH LENGTH: 6.5 MILES
MAX PATH WIDTH: 800 YARDS
EF RATING: EF1 WITH PEAK WINDS NEAR 110 MPH

SEVERAL OTHER TRACKS ARE LIKELY TO COME OUT OF THE SURVEYS,
ESPECIALLY SOUTH OF LAKE EUFAULA IN MCINTOSH COUNTY WHERE STORM
CHASERS OBSERVED SEVERAL SATELLITE TORNADOES AND THE SURVEY TEAM
OBSERVED ADDITIONAL TORNADO DAMAGE. ANOTHER AREA OF DAMAGE THAT IS
BEING LOOKED AT CLOSELY IS A COUPLE MILES SOUTHEAST OF HITCHITA,
WHICH MAY BE THE RESULT OF AN ADDITIONAL SATELLITE TORNADO OF THE
TORNADO THAT MOVED ACROSS LAKE EUFAULA.

...MUSKOGEE COUNTY OKLAHOMA...

WARNER TORNADO
756 PM TO 758 PM
BEGAN: 3 MILES NORTH-NORTHWEST OF WARNER
ENDED: 4 MILES NORTHEAST OF SHADY GROVE
PATH LENGTH: 2 MILES
MAX PATH WIDTH: 400 YARDS
EF RATING: EF1 WITH PEAK WINDS NEAR 105 MPH

...MUSKOGEE/SEQUOYAH COUNTY OKLAHOMA...

WEBBERS FALLS TORNADO
806 PM TO 820 PM
BEGAN: 5.75 MILES NORTHWEST OF WEBBERS FALLS
ENDED: 2.5 MILES NORTH OF BOX
PATH LENGTH: 13 MILES
MAX PATH WIDTH: 1250 YARDS
EF RATING: EF1 WITH PEAK WINDS NEAR 110 MPH

...SEQUOYAH COUNTY OKLAHOMA...

MARBLE CITY TORNADO
827 PM TO 831 PM
BEGAN: 1.5 MILES WEST OF DWIGHT MISSION
ENDED: HALF MILE SOUTHEAST OF MARBLE CITY
PATH LENGTH: 4 MILES
MAX PATH WIDTH: 500 YARDS
EF RATING: EF1 WITH PEAK WINDS NEAR 105 MPH

...OSAGE COUNTY OKLAHOMA...

A SURVEY TEAM FROM THE NATIONAL WEATHER SERVICE IN TULSA CONFIRMED
THAT A TORNADO OCCURRED IN WESTERN OSAGE COUNTY ON THE EVENING OF
10 MAY 2010.

THE TORNADO LIKELY ENTERED OSAGE COUNTY FROM NOBLE COUNTY.  THIS
WILL BE CONFIRMED THROUGH COORDINATION BETWEEN THE NORMAN AND
TULSA NATIONAL WEATHER SERVICE OFFICES.

TORNADO DAMAGE BEGAN IN OSAGE COUNTY AT APPROXIMATELY 514 PM CDT
12.3 MILES SOUTHWEST OF BURBANK.  THE TORNADO TRAVELED TO THE
NORTHEAST AT NEAR 60 MPH AND WAS ON THE GROUND FOR 11 MILES...
LIFTING 3.1 MILES SOUTH OF BURBANK.

THE TORNADO WAS 1.4 MILES WIDE AND WAS PART OF A 2.6 MILE WIDE
DAMAGE SWATH.  THE LARGER DAMAGE SWATH IS A COMBINATION OF
TORNADO DAMAGE AND STRONG REAR FLANK DOWNDRAFT WINDS THE REACHED
NEAR 85 MPH IN A FEW LOCATIONS.  THE TORNADO WAS GIVEN A PRELIMINARY
RATING OF EF-1 ON THE ENHANCED FUJITA SCALE.  THE PEAK WINDS OF THE
TORNADO WERE ESTIMATED NEAR 110 MPH.

THE TORNADO SIGNIFICANTLY DAMAGED TWO HOMES... ALONG WITH SEVERAL
BARNS AND OUTBUILDINGS.  THE TORNADO LIFTED AROUND 525 PM.

Osage County Summary

BURBANK TORNADO
10 MAY 2010
514 PM TO 525 PM CDT
RATING: EF-1
PEAK WINDS: NEAR 110 MPH
PATH LENGTH: 11 MILES
MAX PATH WIDTH: 1.4 MILES

THIS TORNADO LIKELY ENTERED OSAGE COUNTY FROM NOBLE COUNTY.

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Storm Reports

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE TULSA OK
250 PM CDT TUE MAY 11 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0525 PM     TSTM WND GST     BURBANK                 36.69N 96.73W
05/10/2010  M65.00 MPH       OSAGE              OK   MESONET

            BURBANK MESONET...ENDING AT 525 PM

0530 PM     NON-TSTM WND GST 4 NNW TULSA             36.19N 95.95W
05/10/2010  E55.00 MPH       TULSA              OK   PUBLIC

            2 INCH LIMBS BROKEN AND DOWN. ABOUT 1 MILE NORTH OF
            DOWNTOWN.

0530 PM     TSTM WND GST     7 SW BURBANK            36.62N 96.82W
05/10/2010  M64.00 MPH       OSAGE              OK   MESONET

            BURBANK MESONET...ENDING 530 PM

0532 PM     HAIL             7 W PAWHUSKA            36.67N 96.46W
05/10/2010  E1.00 INCH       OSAGE              OK   AMATEUR RADIO

0541 PM     TORNADO          8 W PAWHUSKA            36.67N 96.48W
05/10/2010                   OSAGE              OK   EMERGENCY MNGR

            TOUCHDOWN NEAR HIGHWAY 60 AND 80 ROAD.

0546 PM     TORNADO          1 NW PAWHUSKA           36.68N 96.35W
05/10/2010                   OSAGE              OK   EMERGENCY MNGR

            BRIEF TOUCHDOWN IN OPEN AREA ON NORTHWEST SIDE OF CITY.
            OBSERVED BY SEVERAL PERSONS.

0550 PM     TORNADO          5 NNE PAWHUSKA          36.73N 96.30W
05/10/2010                   OSAGE              OK   EMERGENCY MNGR

            BRIEF TOUCHDOWN IN OPEN AREA NEAR HIGHWAY 99 AND 60.

0615 PM     TSTM WND DMG     2 W SHIDLER             36.78N 96.70W
05/10/2010                   OSAGE              OK   COUNTY OFFICIAL

            FOUR POWER POLES BLOWN DOWN JUST WEST OF TOWN.

0630 PM     HAIL             GRAINOLA                36.94N 96.65W
05/10/2010  E1.00 INCH       OSAGE              OK   PUBLIC

0634 PM     HAIL             BEARDEN                 35.35N 96.39W
05/10/2010  E1.00 INCH       OKFUSKEE           OK   EMERGENCY MNGR

            FEW HAIL STONES. SOME THE SIZE OF QUARTERS.

0637 PM     TORNADO          1 W BEARDEN             35.35N 96.41W
05/10/2010                   OKFUSKEE           OK   EMERGENCY MNGR

            TORNADO OBSERVED BY EM ON GROUND COMING INTO OKFUSKE
            COUNTY FROM CROMWELL AREA. TORNADO LIFTED ABOUT 1 MILE
            WEST AND 1/4 MILE SOUTH. NO OTHER SIGNIFICANT DAMAGE
            UNTIL IT CROSSED THE RIVER TO THE EAST.

0648 PM     HAIL             DEWEY                   36.80N 95.94W
05/10/2010  E0.75 INCH       WASHINGTON         OK   COUNTY OFFICIAL

0655 PM     TSTM WND GST     3 E OKEMAH              35.43N 96.25W
05/10/2010  M59.00 MPH       OKFUSKEE           OK   MESONET

            OKEMAH MESONET...ENDING AT 655 PM

0703 PM     TORNADO          BRYANT                  35.39N 96.06W
05/10/2010                   OKMULGEE           OK   TRAINED SPOTTER

            LARGE TORNADO REPORTED ON THE GROUND NEAR BRYANT

0712 PM     TORNADO          2 SE HENRYETTA          35.42N 95.96W
05/10/2010                   OKMULGEE           OK   AMATEUR RADIO

            TORNADO REPORTED ON GROUND JUST NORTH OF TURNPIKE
            SOUTHEAST OF HENRYETTA

0715 PM     TSTM WND GST     TULSA                   36.13N 95.92W
05/10/2010  E55.00 MPH       TULSA              OK   PUBLIC

0715 PM     HAIL             2 S HENRYETTA           35.41N 95.98W
05/10/2010  E1.75 INCH       OKMULGEE           OK   EMERGENCY MNGR

0720 PM     TORNADO          1 S BOLEY               35.48N 96.48W
05/10/2010                   OKFUSKEE           OK   NWS STORM SURVEY

            NWS STORM SURVEY CONFIRMS A TORNADO THAT BEGAN 1 MILE
            SOUTH OF BOLEY AND ENDED 10.5 MILES NORTH NORTHEAST OF
            OKEMAH. THE MAXIMUM PATH WIDTH WAS 650 YARDS AND THE PATH
            LENGTH WAS 15.5 MILES.

0724 PM     TSTM WND DMG     3 N CASTLE              35.52N 96.38W
05/10/2010                   OKFUSKEE           OK   PUBLIC

            DAMAGE TO TREES AND STRUCTURES NEAR IXL. PROBABLE
            TORNADO.

0726 PM     TORNADO          PIERCE                  35.43N 95.72W
05/10/2010                   MCINTOSH           OK   BROADCAST MEDIA

            TORNADO REPORTED BY NEWS MEDIA. LOCATIONS APPROXIMATE.

0730 PM     NON-TSTM WND GST 2 S WYNONA              36.52N 96.33W
05/10/2010  E63.00 MPH       OSAGE              OK   MESONET

            OCCURRED ABOUT 10 MILES WEST OF ANY OBSERVED
            THUNDERSTORM.

0730 PM     HAIL             1 SE CASTLE             35.46N 96.37W
05/10/2010  E0.75 INCH       OKFUSKEE           OK   STORM CHASER

            ALSO ESTIMATED WINDS TO 50 MILES AN HOUR AND OBSERVED A

            FUNNEL CLOUD AND POSSIBLE BRIEF TORNADO TO THE NORTHWEST.

0735 PM     HAIL             COUNCIL HILL            35.56N 95.65W
05/10/2010  E2.75 INCH       MCINTOSH           OK   AMATEUR RADIO

0740 PM     TORNADO          2 S RENTIESVILLE        35.49N 95.49W
05/10/2010                   MCINTOSH           OK   TRAINED SPOTTER

            TORNADO REPORTED 2 SOUTH OF RENTIESVILLE. RAIN WRAPPED.

0741 PM     HAIL             OKTAHA                  35.58N 95.47W
05/10/2010  E1.00 INCH       MUSKOGEE           OK   POST OFFICE

            NOT MANY STONES NICKLE TO QUARTER IN SIZE.

0743 PM     TORNADO          7 NE OKEMAH             35.50N 96.22W
05/10/2010                   OKFUSKEE           OK   PUBLIC

            TORNADO SIGHTED AND TREES DOWN. RELAYED FROM OUN.

0808 PM     TSTM WND DMG     5 S BRAGGS              35.59N 95.20W
05/10/2010                   MUSKOGEE           OK   NEWSPAPER

            AT BREWERS BEND CAMPGROUND...TRAILER TURNED OVER TRAPPING
            A COUPLE. LARGE TREES BLOWN DOWN ON VEHICLES. THREE
            INJURED. PROBABLE TORNADO.

0820 PM     HAIL             4 N BOX                 35.64N 94.98W
05/10/2010  E2.75 INCH       SEQUOYAH           OK   PUBLIC

            SNAKE CREEK WILDERNESS LODGE

0831 PM     TSTM WND DMG     1 S MARBLE CITY         35.57N 94.82W
05/10/2010                   SEQUOYAH           OK   POST OFFICE

            SEVERAL LARGE TREES BLOWN DOWN. LARGE ROOT BALLS ABOVE
            THE GROUND.

0835 PM     HAIL             1 NW BUNCH              35.69N 94.77W
05/10/2010  E1.00 INCH       ADAIR              OK   POST OFFICE

0835 PM     HAIL             BUNCH                   35.68N 94.76W
05/10/2010  E0.88 INCH       ADAIR              OK   EMERGENCY MNGR

0852 PM     HAIL             4 N NATURAL DAM         35.71N 94.39W
05/10/2010  E0.88 INCH       CRAWFORD           AR   PUBLIC

0907 PM     FUNNEL CLOUD     NATURAL DAM             35.65N 94.39W
05/10/2010                   CRAWFORD           AR   PUBLIC

0913 PM     HAIL             3 S WINSLOW             35.76N 94.13W
05/10/2010  E1.00 INCH       WASHINGTON         AR   AMATEUR RADIO

0915 PM     TSTM WND DMG     CHESTER                 35.68N 94.18W
05/10/2010                   CRAWFORD           AR   POST OFFICE

            MANY BROKEN TREE LIMBS. ONE TREE REPORTED BLOWN DOWN ON A
            CAR. SEVERAL OTHER TREES DOWN.

0926 PM     TSTM WND DMG     10 NNE BOSWELL          34.16N 95.80W
05/10/2010                   CHOCTAW            OK   PUBLIC

            NUMEROUS LARGE TREE LIMBS BROKEN. HAIL ALSO BUT SIZE
            UNKNOWN.

 

 

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Radar Images

 

KINX Radar Reflectivity - Osage County - 512 pm CDT, May 10, 2010	KINX Radar Reflectivity - Osage County - 525 pm CDT, May 10, 2010	KINX Radar Reflectivity - Okfuskee County - 633 pm CDT, May 10, 2010	KINX Storm Relative Velocity - circulation on Seminole/Okfuskee county line - 633 pm CDT, May 10, 2010
KINX Radar Reflectivity - McIntosh County - 741 pm CDT, May 10, 2010	KINX Radar Reflectivity - Muskogee & Cherokee County - 811 pm CDT, May 10, 2010	KINX Storm Relative Velocity - circulation on Muskogee/Sequoyah county line - 811 pm CDT, May 10, 2010

 

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Surface Maps

 

Surface Map - 7 am CDT, May 10th	Surface Map - 1 pm CDT, May 10th	Surface Map - 4 pm CDT, May 10th	Surface Map - 7 pm CDT, May 10th

 

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