Arctic air will filter south and east through early this week. As this cold air moves across the South, a rare winter storm is forecast to develop from Texas, Gulf Coast States into the Southeast through early this week. Several new daily record low temperatures are expected, including new record-low maximum temperatures. For Southern California, fire weather concerns increase this week. Read More >
Overview
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A low pressure system and attached cold front triggered storms in a ripe environment across southern North Dakota during the mid-afternoon, and these storms quickly became strong to severe. Through the remainder of the afternoon and evening, these storms maintained their strong to severe intensity and even became destructive in some areas as they drifted southeast across the border into South Dakota. Extensive crop and property damage resulted from up to 80 mph wind gusts and/or large hail to baseball sized plus across portions of Corson, Dewey, Walworth, Potter, Sully, Hughes and Lyman Counties. Two rounds of severe storms about an hour apart affected those roughly from Blunt to Lower Brule to Iona. As storms continued south of the NWS Aberdeen forecast area into Gregory county in south central South Dakota, a tornado rapidly developed in the town of Burke. This EF-1 tornado produced significant damage to portions of the city center. For more information, visit this summary page from NWS Sioux Falls. |
 2.3" Hail one mile west of Blunt, SD (Credit Derek Thompson) |
Photos & Video
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| Whitlock Bay area - Hail damaged the siding of a house (Credit - Beaty Hanson) |
Whitlock Bay area - Hail damaged the siding of a house (Credit - Beaty Hanson) |
Sunflower field before the storm hit - northwest of Agar, SD (Credit - Todd Yackley) |
The same sunflower field (northwest of Agar, SD) after the storm moved through (Credit - Todd Yackley) |
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| Damaged soybeans 8 miles south of Pollock on Highway 1804 (Credit Brent Odde) |
3" Hail near Stephan, SD (Credit - Freddy McKinney) |
Baseball sized hail near Blunt, SD (Credit - Valerie Marso) |
Hail from southeast of Blunt, SD (Credit - Penny Norris) |
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| Windshield damage from 2.4" diameter hail 1W of Blunt. Courtesy of Derek Thompson | Supercell thunderstorm 10SW of Gettysburg. Courtesy of Derek Thompson | Supercell thunderstorm near Stephan. Courtesy of Freddy McKinney | Supercell thunderstorm near Stephan. Courtesy of Freddy McKinney |
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| Cattle southwest of Mobridge were bruised after enduring the hail storm. Photo Courtesy of Mark Landis. | Cattle southwest of Mobridge were bruised after enduring the hail storm. Photo Courtesy of Mark Landis. | Cattle southwest of Mobridge were bruised after enduring the hail storm. Photo Courtesy of Mark Landis. | Cattle southwest of Mobridge were bruised after enduring the hail storm. Photo Courtesy of Mark Landis. |
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| Cloud-to-ground lightning strike as seen from Richmond Lake. Courtesy of Mike Scott | Mammatus clouds at sunset as seen from Richmond Lake. Courtesy of Mike Scott | Supercell thunderstorm near Stephan. Courtesy of Freddy McKinney | Supercell thunderstorm near Stephan. Courtesy of Freddy McKinney |
Radar & Satellite
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| Radar loop of the event, running from 2:21 PM to 11:00 PM CDT on August 6th, 2019. | Radar imagery and cross-section of the storm when it moved through Blunt, SD (7:21 PM CDT - August 6, 2019). At that time, hail to the size of baseballs fell and the storm was over 50,000 feet tall. |
| 1 Minute GOES-East satellite loop of the event, running from 2:30 PM to 10:30 PM CDT on August 6th, 2019. This "Sandwich" product combines visible and infrared satellite imagery to allow forecasters to see the increased storm details from the visible imagery with temperature information from the top of the storm in the infrared imagery. |
| GOES-East Visible Imagery of Severe Thunderstorms in South Dakota on August 6, 2019. The loop runs from 2:15 PM to 9:15 PM CDT. |
Storm Reports
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| The "Radar Hail Tracks" portion of this graphic shows the areas that saw roughly from 1" to 3" diameter hail across central South Dakota. This, combined with high winds, left a scar on vegetation which dried out and died in as little as 2 days following the storm, as seen on Visible Satellite from space. Click to enlarge. | Map of the hail and wind reports listed below. Click to enlarge. Find an interactive map version of reports here. |
LSRABR
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE ABERDEEN SD
207 PM CDT WED AUG 7 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0720 PM TSTM WND GST 1 WSW BLUNT 44.51N 100.01W
08/06/2019 M78 MPH HUGHES SD STORM CHASER
ALSO MEASURED 2.4 INCH HAIL 20 MINUTES AFTER
IT FELL.
0623 PM TSTM WND GST WHITLOCKS BAY REC AREA 45.05N 100.27W
08/06/2019 M70 MPH POTTER SD PUBLIC
1.75 INCH HAIL ALSO REPORTED.
0845 PM TSTM WND GST 3 SE RELIANCE 43.85N 99.56W
08/06/2019 M64 MPH LYMAN SD MESONET
DOT RWIS.
0915 PM TSTM WND GST LOWER BRULE 44.07N 99.58W
08/06/2019 E60 MPH LYMAN SD FIRE DEPT/RESCUE
0733 PM TSTM WND GST 2 S JAVA 45.47N 99.88W
08/06/2019 E60 MPH WALWORTH SD EMERGENCY MNGR
0635 PM TSTM WND GST 7 ESE HERREID 45.80N 99.94W
08/06/2019 E60 MPH CAMPBELL SD PUBLIC
3 INCH DIAMETER BRANCH DOWN. A FEW QUARTER
SIZE HAIL, BUT MOSTLY DIME TO NICKEL SIZE.
0400 PM TSTM WND GST 9 S WATAUGA 45.79N 101.54W
08/06/2019 E60 MPH CORSON SD PUBLIC
BRIEF HAIL BETWEEN NICKEL AND QUARTER SIZE.
0504 PM TSTM WND GST 4 W TRAIL CITY 45.47N 100.81W
08/06/2019 M59 MPH DEWEY SD MESONET
0625 PM TSTM WND GST 2 N HERREID 45.87N 100.08W
08/06/2019 M57 MPH CAMPBELL SD MESONET
0748 PM HAIL 8 NNW WEST BEND REC ARE 44.27N 99.78W
08/06/2019 M3.00 INCH HUGHES SD STORM CHASER
MANY HAIL STONES EXCEEDING 3 INCHES IN SIZE.
0915 PM HAIL LOWER BRULE 44.07N 99.58W
08/06/2019 E2.75 INCH LYMAN SD FIRE DEPT/RESCUE
TENNIS BALL TO BASEBALL SIZE HAIL. WINDOW
DAMAGE TO VEHICLES AND HOMES.
0805 PM HAIL 5 SE JOE CREEK REC AREA 44.09N 99.74W
08/06/2019 E2.75 INCH LYMAN SD TRAINED SPOTTER
MOSTLY GOLF BALL SIZE HAIL WITH A FEW
BASEBALL SIZE.
0730 PM HAIL 2 S JAVA 45.47N 99.88W
08/06/2019 E2.75 INCH WALWORTH SD TRAINED SPOTTER
MOSTLY GOLF BALL SIZE HAIL. VEHICLE WINDOWS
SHATTERED.
0721 PM HAIL 1 E BLUNT 44.52N 99.97W
08/06/2019 M2.75 INCH HUGHES SD TRAINED SPOTTER
GOLF BALL TO BASEBALL SIZED HAIL FELL FROM 1
MILE WEST TO 1 MILE EAST OF BLUNT. SEVERAL
REPORTS OF WINDOWS AND SIDING BROKEN. TREE
LIMBS DOWN. WINDS ESTIMATED 60 TO 65 MPH.
1004 PM HAIL 3 SSW IONA 43.50N 99.44W
08/06/2019 U2.00 INCH LYMAN SD PUBLIC
HAIL SIZE IS UNKNOWN, BUT IT WAS LARGE
ENOUGH TO DAMAGE SIDING, BREAK WINDOWS, AND
SEVERELY DAMAGE CROPS. RADAR ESTIMATED TIME.
0820 PM HAIL 1 E BLUNT 44.52N 99.97W
08/06/2019 M1.75 INCH HUGHES SD TRAINED SPOTTER
0643 PM HAIL 6 W AGAR 44.82N 100.20W
08/06/2019 M1.75 INCH SULLY SD TRAINED SPOTTER
18 INCH DIAMETER TREE DOWN ON POWER LINES.
0639 PM HAIL 4 WSW GORMAN 44.90N 100.14W
08/06/2019 M1.75 INCH SULLY SD TRAINED SPOTTER
ALL WINDOWS ON NORTH SIDE OF HOUSE BROKEN
OUT.
0828 PM HAIL 5 ESE BLUNT 44.50N 99.88W
08/06/2019 E1.25 INCH HUGHES SD PUBLIC
QUARTER TO HALF DOLLAR SIZE. NO APPARENT
DAMAGE NOTICEABLE.
0750 PM HAIL 3 NE HOVEN 45.27N 99.74W
08/06/2019 E1.25 INCH WALWORTH SD PUBLIC
MOSTLY QUARTER SIZE HAIL, SOME HALF DOLLAR
SIZE. SOME GARDEN CROP DAMAGE.
0905 PM HAIL 4 NW WEST BEND REC AREA 44.21N 99.78W
08/06/2019 E1.00 INCH HUGHES SD PUBLIC
0810 PM HAIL 3 ESE TOLSTOY 45.19N 99.56W
08/06/2019 M1.00 INCH FAULK SD PUBLIC
0747 PM HAIL 2 N HOVEN 45.27N 99.78W
08/06/2019 E1.00 INCH WALWORTH SD PUBLIC
0740 PM HAIL 6 W BOWDLE 45.45N 99.78W
08/06/2019 M1.00 INCH WALWORTH SD EMERGENCY MNGR
TIME ESTIMATED FROM RADAR.
0728 PM HAIL 2 S JAVA 45.47N 99.88W
08/06/2019 E1.00 INCH WALWORTH SD EMERGENCY MNGR
MOSTLY DIME TO NICKEL SIZE HAIL WITH SOME
QUARTER SIZE.
0718 PM HAIL 3 NE SELBY 45.54N 99.99W
08/06/2019 M1.00 INCH WALWORTH SD TRAINED SPOTTER
OVER 60 MPH ESTIMATED AS WELL.
0524 PM HAIL 5 E TRAIL CITY 45.48N 100.63W
08/06/2019 E1.00 INCH CORSON SD PUBLIC
40 MPH WIND ESTIMATE. CORN CROP WAS
STRIPPED.
0500 PM HAIL 3 N TRAIL CITY 45.52N 100.73W
08/06/2019 M1.00 INCH CORSON SD PUBLIC
DEPTH OF HAIL WAS 5 INCHES. CORN CROP WAS
STRIPPED.
0445 PM HAIL 5 SSE LITTLE EAGLE 45.62N 100.77W
08/06/2019 M1.00 INCH CORSON SD PUBLIC
GROUND BECAME WHITE WITH HAIL.
0425 PM HAIL 6 WSW LITTLE EAGLE 45.65N 100.92W
08/06/2019 E1.00 INCH CORSON SD PUBLIC
MOST HAILSTONES BETWEEN NICKEL AND QUARTER
SIZE.
0804 PM HAIL 3 NNW TOLSTOY 45.25N 99.64W
08/06/2019 E0.88 INCH EDMUNDS SD NWS EMPLOYEE
0502 PM HAIL 10 N TIMBER LAKE 45.58N 101.04W
08/06/2019 M0.50 INCH CORSON SD PUBLIC
0957 PM TSTM WND DMG 2 NE IONA 43.56N 99.40W
08/06/2019 LYMAN SD PUBLIC
TREES DOWN, SHINGLES OFF HOMEOWNERS ROOF.
RADAR ESTIMATED TIME.
0715 PM FUNNEL CLOUD 4 SSE BLUNT 44.47N 99.97W
08/06/2019 HUGHES SD STORM CHASER
0643 PM TSTM WND DMG 9 ENE MOUND CITY 45.76N 99.89W
08/06/2019 CAMPBELL SD PUBLIC
GARDEN CROPS DAMAGED AND SOME FLATTENED.
0625 PM TSTM WND DMG 3 SSW WHITLOCKS BAY REC 45.00N 100.28W
08/06/2019 POTTER SD PUBLIC
WINDS ESTIMATED AT AT LEAST 80 MPH. HAIL AS
LARGE AS TENNIS BALLS, ALTHOUGH MOST WERE
SMALLER. HAIL ACCUMULATED IN DRIFTS THAT
WERE 7 TO 8 INCHES DEEP. WIND DRIVEN HAIL
SHREDDED SIDING, MANY WINDOWS BROKEN. TREES
WERE BOTH UPROOTED AND BROKEN AT THE TRUNK
AND MANY VERY LARGE BRANCHES ARE DOWN. THE
ROOF OF A NEARBY STORAGE UNIT WAS PARTIALLY
TORN OFF.
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