A major winter storm will continue to bring blizzard conditions, heavy snowfall, icing, and strong winds through Monday across the Upper Midwest and Upper Great Lakes. A line of storms will be capable of producing widespread damaging winds, tornadoes, and some large hail from the Mid-South to the Ohio Valley and the Southeast through tonight, moving into the Mid-Atlantic Monday. Read More >
Overview
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Thunderstorms developed over southeast Montana and northeast Wyoming in the mid-afternoon, then quickly become severe as they tracked southeast through the northern Black Hills, Rapid City, the Badlands, and areas within and east of the Pine Ridge Reservation. Very large hail bigger than baseballs and severe wind gusts in excess of 80 mph occurred, along with a couple tornadoes. |
 View of storm looking west from Skyline Drive in Rapid City, courtesy of David Stradling |
Tornadoes:
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Tornado - Between Batesland and Allen
Track Map   |
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Tornado - Spearfish Canyon
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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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Photos & Video
Below is a picture of the storm as it approached Rapid City, courtesy Matthew Morse.
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Below is a photo of the largest documented hail stone, which fell in Swett, SD. Photo courtesy of Kaitlyn Rayhill.
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Below are photos of the hail around Rapid City.
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| Courtesy LeAnna Dugue' | Courtesy Tatiana Spain | Courtesy Shane Eagan |
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| Courtesy Jim Bussell | Courtesy Shane Eagan | Courtesy Jon Chamberlain | Courtesy Jon Chamberlain |
Below are storm damage photos in/around the northern Black Hills.
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| Near Beulah, WY, courtesy Nadia Simons | Near Terry Peak, courtesy Haley Bachler | Near Terry Peak, courtesy Haley Bachler | Near Terry Peak, courtesy Haley Bachler |
Below are storm damage photos in eastern Oglala Lakota and western Bennett counties.
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| Batesland, courtesy Dawn Marie Shelbourn | Swett, courtesy Kaitlyn Rayhillr | Sharps Corner, courtesy Jon Siedschlaw | Batesland, courtesy Jon Siedschlaw |
Tornado SW/SD https://t.co/13E61DshHA
— Jeff Piotrowski (@Jeff_Piotrowski) July 11, 2020
Aerial view of some of the hail fog on the SW side of Rapid City, SD. @weatherchannel @NWSRapidCity #sdwx #hail #dronephotography pic.twitter.com/i55CfcqTHZ
— Charles Peek (@CharlesPeekWX) July 11, 2020
Radar
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| Radar-accumluated rotation in the northern Black Hills, which shows where the supercell's strongest low-level circulation was and can be indicative of a potential tornado | Radar-accumluated rotation in Oglala and Bennett counties, which shows where the supercell's strongest low-level circulation was and can be indicative of a potential tornado |
Storm Reports
Here are the preliminary severe thunderstorm storm reports for July 10, 2020.
HAIL REPORTS LISTED BY SIZE (INCHES)
SIZE LOCATION ST COUNTY TIME
------ ----------------------- -- -------------- -------
4.00 SWETT SD BENNETT 0655 PM
3.25 4 W DWTN RAPID CITY SD PENNINGTON 0450 PM
SEVERAL WINDSHIELDS BROKEN IN THE
NEIGHBORHOOD
3.25 4 SW DWTN RAPID CITY SD PENNINGTON 0440 PM
LASTED 13 MINUTES
3.25 5 SW BEULAH WY CROOK 0332 PM
3.00 1 SSE DWTN RAPID CITY SD PENNINGTON 0454 PM
3.00 2 SW DWTN RAPID CITY SD PENNINGTON 0443 PM
3.00 4 SW DWTN RAPID CITY SD PENNINGTON 0440 PM
3.00 4 W DWTN RAPID CITY SD PENNINGTON 0435 PM
2.75 9 S MARTIN SD BENNETT 0715 PM
2.75 1 SE SHARPS CORNER SD OGLALA LAKOTA 0625 PM
2.75 2 SW DWTN RAPID CITY SD PENNINGTON 0444 PM
2.50 5 W ROCKYFORD SD OGLALA LAKOTA 0550 PM
2.50 3 W DWTN RAPID CITY SD PENNINGTON 0440 PM
2.25 4 S DWTN RAPID CITY SD PENNINGTON 0448 PM
2.25 1 E DWTN RAPID CITY SD PENNINGTON 0443 PM
2.00 3 W DWTN RAPID CITY SD PENNINGTON 0446 PM
2.00 3 S DWTN RAPID CITY SD PENNINGTON 0444 PM
1.75 5 E PORCUPINE SD OGLALA LAKOTA 0637 PM
1.75 9 SW FARMINGDALE SD PENNINGTON 0530 PM
1.75 2 WSW DWTN RAPID CITY SD PENNINGTON 0436 PM
REPORTED AT JACKSON BLVD AND 32ND ST
1.75 4 WNW DWTN RAPID CITY SD PENNINGTON 0430 PM
1.75 2 NNE JOHNSON SIDING SD PENNINGTON 0420 PM
1.75 DWTN SPEARFISH SD LAWRENCE 0345 PM
1.75 6 W BEULAH WY CROOK 0323 PM
HAIL AND WIND LASTED 10 MINUTES
1.50 1 NNW PIEDMONT SD MEADE 0424 PM
1.50 16 SSE MISSION SD TODD 1035 AM
HEAVY RAIN IS CAUSING FLOODING.
1.25 1 SSW RAPID VALLEY SD PENNINGTON 0453 PM
1.25 5 NE ROCKERVILLE SD PENNINGTON 0450 PM
1.25 1 E DWTN RAPID CITY SD PENNINGTON 0435 PM
1.25 1 NNW SUMMERSET SD MEADE 0422 PM
QUARTER SIZED HAIL STARTED AT 420 PM,
INCREASED TO PING-PONG BALL SIZE AT 428 PM.
1.25 19 SSE MISSION SD TODD 1045 AM
1.00 5 ENE CUSTER SD CUSTER 0540 PM
1.00 7 SW RAPID CITY ARPT SD PENNINGTON 0500 PM
1.00 4 NE ROCKERVILLE SD PENNINGTON 0451 PM
HAIL LASTED ABOUT 8 MINUTES
1.00 1 NNW SUMMERSET SD MEADE 0434 PM
AT I-90 EXIT 52
1.00 SUMMERSET SD MEADE 0430 PM
1.00 1 S DWTN SPEARFISH SD LAWRENCE 0351 PM
1.00 9 W DWTN SPEARFISH SD LAWRENCE 0340 PM
1.00 8 NNE SUNDANCE WY CROOK 0325 PM
1.00 ALADDIN WY CROOK 0320 PM
1.00 4 SE ALVA WY CROOK 0310 PM
1.00 12 WNW COLONY WY CROOK 0245 PM
0.88 9 WSW HILL CITY SD PENNINGTON 0525 PM
0.88 1 N HEREFORD SD MEADE 0458 PM
0.88 ROCKERVILLE SD PENNINGTON 0456 PM
0.88 1 NNE ROSEBUD SD TODD 1015 AM
0.75 3 NW NEW HAVEN WY CROOK 0230 PM
0.50 3 NNW HULETT WY CROOK 0300 PM
TSTM WIND REPORTS LISTED BY SPEED (MPH)
SPEED LOCATION ST COUNTY TIME
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97.00 15 SSE MISSION SD TODD 1034 AM
85.00 15 SSE MISSION SD TODD 0807 PM
85.00 8 ESE SAINT FRANCIS SD TODD 1040 AM
8 INCH TREE BRANCHES DOWN AND TOPS OF CEDAR
TREES SNAPPED
85.00 16 SSE MISSION SD TODD 1035 AM
LARGE COTTONWOOD AND ELM TREES BLOWN DOWN AND
BROKEN.
80.00 9 SW FARMINGDALE SD PENNINGTON 0530 PM
80.00 19 SSE MISSION SD TODD 1045 AM
SEVERAL TREE BRANCHES 6 TO 8 INCH IN DIAMETER
BROKEN AND SNAPPED FROM TREES.
79.00 15 SSE MISSION SD TODD 0802 PM
70.00 1 N HEREFORD SD MEADE 0458 PM
70.00 6 W BEULAH WY CROOK 0323 PM
HAIL AND WIND LASTED 10 MINUTES
68.00 7 ESE ROSEBUD SD TODD 1025 AM
64.00 15 SSE MISSION SD TODD 0757 PM
64.00 15 SSE MISSION SD TODD 1029 AM
63.00 BEULAH WY CROOK 0336 PM
60.00 SUMMERSET SD MEADE 0430 PM
60.00 2 NNE JOHNSON SIDING SD PENNINGTON 0420 PM
60.00 10 E DEVILS TOWER WY CROOK 0315 PM
POSSIBLY MORE THAN 60 MPH
60.00 3 NNW HULETT WY CROOK 0300 PM
60.00 3 NW NEW HAVEN WY CROOK 0230 PM
60.00 1 NNE ROSEBUD SD TODD 1015 AM
59.00 7 ESE ROSEBUD SD TODD 1020 AM
58.00 11 SW PARMELEE SD TODD 0737 PM
57.00 11 SW PARMELEE SD TODD 0732 PM
56.00 9 SW BATESLAND SD OGLALA LAKOTA 0657 PM
56.00 BEULAH WY CROOK 0346 PM
55.00 3 ESE PINE RIDGE SD OGLALA LAKOTA 0644 PM
55.00 3 NW WASTA SD PENNINGTON 0532 PM
55.00 3 WSW FAIRBURN SD CUSTER 0530 PM
54.00 15 SSE MISSION SD TODD 0817 PM
54.00 3 NW WASTA SD PENNINGTON 0542 PM
54.00 1 E DWTN RAPID CITY SD PENNINGTON 0440 PM
54.00 12 WSW CASTLE ROCK SD BUTTE 0400 PM
53.00 5 WNW NEW UNDERWOOD SD PENNINGTON 0507 PM
53.00 2 SE HULETT WY CROOK 0255 PM
52.00 11 SW PARMELEE SD TODD 0727 PM
52.00 1 ESE MARTIN SD BENNETT 0715 PM
52.00 3 ESE PINE RIDGE SD OGLALA LAKOTA 0654 PM
52.00 5 WNW NEW UNDERWOOD SD PENNINGTON 0517 PM
52.00 1 NE ECHETA WY CAMPBELL 0251 PM
51.00 WEWELA SD TRIPP 0817 PM
51.00 1 ESE MARTIN SD BENNETT 0735 PM
51.00 3 WSW FAIRBURN SD CUSTER 0545 PM
51.00 3 WSW FAIRBURN SD CUSTER 0540 PM
51.00 4 S DWTN RAPID CITY SD PENNINGTON 0500 PM
50.00 WEWELA SD TRIPP 0827 PM
RAIN AMOUNTS (INCHES)
AMOUNT LOCATION ST COUNTY TIME
------ ----------------------- -- -------------- -------
2.20 4 NNE DWTN RAPID CITY SD PENNINGTON 0448 PM
WIND GUSTS 30-35 MPH
1.02 1 NNW PIEDMONT SD MEADE 0450 PM
RAINFALL FELL IN 30 MINUTES.
0.75 SUMMERSET SD MEADE 0430 PM
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