A series of Bering Sea storms will impact western Alaska this week, with elevated water levels, isolated coastal flooding, high surf, erosion, and strong winds. Heavy rain and snow are also expected for the West Coast into Interior Alaska. A multi-day flash flooding threat is forecast across parts of the southern High Plains and Southwest through the weekend. Surf remains high for Florida. Read More >
Overview
A storm formed over northwestern South Dakota and moved across Meade County. It produced a small tornado south of White Owl, then produced extreme wind gusts over 100 mph south of Plainview.|
Tornado - White Owl, SD
Track Map   |
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| Trees toppled near Corral Road (NWS) | Trees snapped near Corral Road (NWS) |
The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:
| EF0 Weak 65-85 mph |
EF1 Moderate 86-110 mph |
EF2 Significant 111-135 mph |
EF3 Severe 136-165 mph |
EF4 Extreme 166-200 mph |
EF5 Catastrophic 200+ mph |
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Wind:
As the storm continued to move eastward, it snapped additional power poles and destroyed a small hunting cabin along Plainview Road south of Plainview, SD. A nearby weather station recorded a 112 mph wind gust. Farther east; it flipped two sheds, pushed another shed about 30 feet across the ground, and snapped large trees at a ranch.
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| Part of shed blown over | Second part of shed blown over | Shed pushed along the ground | Snapped power pole and debris from cabin |
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| Weather Station display showing 112 mph wind gust south of Plainview, SD (courtesy of Sioux Spiritual Center) |
Radar:
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| Nice inflow notch and hook echo quickly developed south of White Owl, SD at 430 PM MDT | Doppler velocity shows a compact circulation 430 PM MDT | A minima of correlation coefficient values near the tip of the hook typically signifies a tornado lofting some debris. The tornado was snapping pine trees at 430 PM MDT. | As the storm moved east, the compact circulation morphed into a large area of 100 knot straight-line winds. The "S" marks where the Davis Weather Station recorded a 112 MPH wind gust at the Sioux Spiritual Center south of Plainview, SD. |
Storm Reports:
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE RAPID CITY SD
935 PM MDT WED JUL 06 2016
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0228 PM HAIL SUNDANCE 44.40N 104.38W
07/06/2016 E0.25 INCH CROOK WY TRAINED SPOTTER
0250 PM HAIL NEWELL 44.71N 103.42W
07/06/2016 E1.00 INCH BUTTE SD TRAINED SPOTTER
0250 PM TSTM WND GST NEWELL 44.71N 103.42W
07/06/2016 E60 MPH BUTTE SD TRAINED SPOTTER
0330 PM TSTM WND GST 2 SSE TILFORD 44.28N 103.42W
07/06/2016 E60 MPH MEADE SD TRAINED SPOTTER
0330 PM HAIL 2 SSE TILFORD 44.28N 103.42W
07/06/2016 E0.88 INCH MEADE SD TRAINED SPOTTER
0335 PM TSTM WND GST 12 SSE DOWNTOWN NEWCAST 43.70N 104.13W
07/06/2016 E60 MPH WESTON WY TRAINED SPOTTER
0340 PM HAIL TILFORD 44.30N 103.43W
07/06/2016 E0.75 INCH MEADE SD TRAINED SPOTTER
0410 PM HAIL 6 WNW LADNER 45.87N 103.85W
07/06/2016 E1.50 INCH HARDING SD PUBLIC
0410 PM HAIL ENNING 44.58N 102.56W
07/06/2016 E2.50 INCH MEADE SD TRAINED SPOTTER
SEVERAL BROKEN VEHICLE WINDOWS
0410 PM TSTM WND GST ENNING 44.58N 102.56W
07/06/2016 E60 MPH MEADE SD TRAINED SPOTTER
SEVERAL BROKEN VEHICLE WINDOWS
0415 PM HAIL 7 NNE ELLSWORTH AFB 44.23N 103.04W
07/06/2016 M1.00 INCH MEADE SD NWS EMPLOYEE
0419 PM HAIL 2 N BOX ELDER 44.15N 103.07W
07/06/2016 E1.50 INCH MEADE SD PUBLIC
0420 PM HAIL 2 ENE ELLSWORTH AFB 44.16N 103.06W
07/06/2016 E1.75 INCH MEADE SD NWS EMPLOYEE
0420 PM TSTM WND GST 8 SSW UNION CENTER 44.45N 102.70W
07/06/2016 E60 MPH MEADE SD TRAINED SPOTTER
0420 PM HAIL BOX ELDER 44.12N 103.07W
07/06/2016 E1.75 INCH PENNINGTON SD PUBLIC
0420 PM HAIL ENNING 44.58N 102.56W
07/06/2016 E2.50 INCH MEADE SD PUBLIC
SHATTERED WINDSHIELD
0420 PM HAIL ELLSWORTH AFB 44.15N 103.10W
07/06/2016 E1.75 INCH MEADE SD PUBLIC
0422 PM HAIL 5 S ENNING 44.50N 102.56W
07/06/2016 E1.25 INCH MEADE SD NWS EMPLOYEE
HAIL DRIFTS
0423 PM HAIL 1 S ENNING 44.56N 102.56W
07/06/2016 E3.00 INCH MEADE SD NWS EMPLOYEE
HAIL ACCUMULATED
0430 PM TSTM WND GST 4 N ELM SPRINGS 44.37N 102.53W
07/06/2016 E70 MPH MEADE SD NWS EMPLOYEE
0430 PM HAIL 4 N ELM SPRINGS 44.37N 102.53W
07/06/2016 E0.50 INCH MEADE SD NWS EMPLOYEE
0430 PM TSTM WND GST 3 E ELM SPRINGS 44.31N 102.47W
07/06/2016 E60 MPH MEADE SD TRAINED SPOTTER
0435 PM TSTM WND GST 4 NNE ANGOSTURA RESERVO 43.37N 103.39W
07/06/2016 M57 MPH FALL RIVER SD AWOS
0440 PM TSTM WND GST 5 ESE DOWNTOWN HOT SPRI 43.40N 103.40W
07/06/2016 E60 MPH FALL RIVER SD TRAINED SPOTTER
0450 PM TSTM WND DMG 19 NNE CREIGHTON 44.50N 102.03W
07/06/2016 PENNINGTON SD TRAINED SPOTTER
MANY TREE TOPS BROKEN OFF ... SOME 100 YEARS OLD...
WORST WINDS HE HAD SEEN IN 50 YEARS. DOOR BLOWN OFF THE
HINGES.
0455 PM TSTM WND DMG 15 WNW MILESVILLE 44.51N 101.98W
07/06/2016 HAAKON SD PUBLIC
TREES BROKEN AND UP ROOTED... 2 BARNS DESTROYED... ONE
BARN MOVED OFF FOUNDATION... PICKUP TRUCK FLIPPED ON ITS
SIDE
0508 PM TSTM WND GST RAPID CITY AIRPORT 44.05N 103.06W
07/06/2016 M56 MPH PENNINGTON SD ASOS
0510 PM TSTM WND GST 2 SW BRIDGER 44.53N 101.93W
07/06/2016 M68 MPH ZIEBACH SD DEPT OF HIGHWAYS
AT LEAST 20 MINUTES OF GUSTS GREATER THAN 58 MPH
0515 PM HAIL 5 NE MILESVILLE 44.52N 101.62W
07/06/2016 E1.00 INCH HAAKON SD TRAINED SPOTTER
LASTED 30 MINUTES
0515 PM TSTM WND GST 5 NE MILESVILLE 44.52N 101.62W
07/06/2016 E70 MPH HAAKON SD TRAINED SPOTTER
LASTED 30 MINUTES
0520 PM TSTM WND GST 3 NNW SCENIC 43.82N 102.58W
07/06/2016 M69 MPH PENNINGTON SD DEPT OF HIGHWAYS
0539 PM HAIL 2 SW KIRLEY 44.50N 101.34W
07/06/2016 E0.50 INCH HAAKON SD TRAINED SPOTTER
0539 PM TSTM WND GST 2 SW KIRLEY 44.50N 101.34W
07/06/2016 E50 MPH HAAKON SD TRAINED SPOTTER
0550 PM TSTM WND GST 2 S CACTUS FLAT 43.81N 101.89W
07/06/2016 E60 MPH JACKSON SD TRAINED SPOTTER
0600 PM TSTM WND GST 4 E CACTUS FLAT 43.84N 101.82W
07/06/2016 M66 MPH JACKSON SD DEPT OF HIGHWAYS
0610 PM TSTM WND GST 4 E CACTUS FLAT 43.84N 101.82W
07/06/2016 M63 MPH JACKSON SD DEPT OF HIGHWAYS
0615 PM TSTM WND GST 7 N LODGEPOLE 45.91N 102.66W
07/06/2016 E60 MPH PERKINS SD PUBLIC
0640 PM TSTM WND GST 6 NE OTTUMWA 44.30N 101.25W
07/06/2016 E60 MPH HAAKON SD TRAINED SPOTTER
THE STORM REPORTS LISTED BELOW ARE IN DESCENDING ORDER AND MAY NOT NECESSARILY
BE THE FINAL STORM REPORTS.
HAIL REPORTS LISTED BY SIZE (INCHES)
SIZE LOCATION ST COUNTY TIME
------ ----------------------- -- -------------- -------
3.00 1 S ENNING SD MEADE 0423 PM
2.50 ENNING SD MEADE 0420 PM
2.50 ENNING SD MEADE 0410 PM
1.75 ELLSWORTH AFB SD MEADE 0420 PM
1.75 BOX ELDER SD PENNINGTON 0420 PM
1.75 2 ENE ELLSWORTH AFB SD MEADE 0420 PM
1.50 2 N BOX ELDER SD MEADE 0419 PM
1.50 6 WNW LADNER SD HARDING 0410 PM
1.25 5 S ENNING SD MEADE 0422 PM
1.00 5 NE MILESVILLE SD HAAKON 0515 PM
1.00 7 NNE ELLSWORTH AFB SD MEADE 0415 PM
1.00 NEWELL SD BUTTE 0250 PM
0.88 2 SSE TILFORD SD MEADE 0330 PM
0.75 TILFORD SD MEADE 0340 PM
0.50 2 SW KIRLEY SD HAAKON 0539 PM
0.50 4 N ELM SPRINGS SD MEADE 0430 PM
0.25 SUNDANCE WY CROOK 0228 PM
TSTM WIND REPORTS LISTED BY SPEED (MPH)
SPEED LOCATION ST COUNTY TIME
------ ----------------------- -- -------------- -------
70.00 5 NE MILESVILLE SD HAAKON 0515 PM
70.00 4 N ELM SPRINGS SD MEADE 0430 PM
69.00 3 NNW SCENIC SD PENNINGTON 0520 PM
68.00 2 SW BRIDGER SD ZIEBACH 0510 PM
66.00 4 E CACTUS FLAT SD JACKSON 0600 PM
63.00 4 E CACTUS FLAT SD JACKSON 0610 PM
60.00 6 NE OTTUMWA SD HAAKON 0640 PM
60.00 7 N LODGEPOLE SD PERKINS 0615 PM
60.00 2 S CACTUS FLAT SD JACKSON 0550 PM
60.00 5 ESE DOWNTOWN HOT SPRI SD FALL RIVER 0440 PM
60.00 3 E ELM SPRINGS SD MEADE 0430 PM
60.00 8 SSW UNION CENTER SD MEADE 0420 PM
60.00 ENNING SD MEADE 0410 PM
60.00 12 SSE DOWNTOWN NEWCAST WY WESTON 0335 PM
60.00 2 SSE TILFORD SD MEADE 0330 PM
60.00 NEWELL SD BUTTE 0250 PM
57.00 4 NNE ANGOSTURA RESERVO SD FALL RIVER 0435 PM
56.00 RAPID CITY AIRPORT SD PENNINGTON 0508 PM
50.00 2 SW KIRLEY SD HAAKON 0539 PM
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