WESTERN, SOUTH DAKOTA - A powerful supercell thunderstorm that started its journey in Wyoming moved across the Black Hills, Rapid City, and southwest, South Dakota brought massive hail, strong winds, and some isolated tornadoes.
During the event, the most significant hail was found in Swett, South Dakota, where Grapefruit size hail or four inches in diameter was reported. This image below from the National Weather Service in Rapid City overview of the storms was taken in Swett, South Dakota, by K. Rayhill.
Rapid City also saw its share of large hail with about teacup size hail or three inches in diameter reported just outside of town down.
Up towards the northwest, the city of Spearfish saw golf ball size hail or 1.75 inch diameter hail, and in Piedmont, hail to the size of Ping Pong Balls fell from the storm.
Below is the complete July 10th hail reports from the National Weather Service.
|07:55 pm CDT||SWETT, SD||Hail||4.00 INCH|
|05:50 pm CDT||4 W DWTN RAPID CITY, SD||Hail||3.25 INCH|
|05:40 pm CDT||4 SW DWTN RAPID CITY, SD||Hail||3.25 INCH|
|05:54 pm CDT||1 SSE DWTN RAPID CITY, SD||Hail||3.00 INCH|
|05:43 pm CDT||2 SW DWTN RAPID CITY, SD||Hail||3.00 INCH|
|05:44 pm CDT||2 SW DWTN RAPID CITY, SD||Hail||2.75 INCH|
|08:15 pm CDT||9 S MARTIN, SD||Hail||2.75 INCH|
|07:25 pm CDT||1 SE SHARPS CORNER, SD||Hail||2.75 INCH|
|05:40 pm CDT||3 W DWTN RAPID CITY, SD||Hail||2.50 INCH|
|06:50 pm CDT||5 W ROCKYFORD, SD||Hail||2.50 INCH|
|05:43 pm CDT||1 E DWTN RAPID CITY, SD||Hail||2.25 INCH|
|08:27 pm CDT||4 NNE GLENHAM, SD||Hail||2.00 INCH|
|05:46 pm CDT||3 W DWTN RAPID CITY, SD||Hail||2.00 INCH|
|05:44 pm CDT||3 S DWTN RAPID CITY, SD||Hail||2.00 INCH|
|05:20 pm CDT||2 NNE JOHNSON SIDING, SD||Hail||1.75 INCH|
|05:30 pm CDT||4 WNW DWTN RAPID CITY, SD||Hail||1.75 INCH|
|05:36 pm CDT||2 WSW DWTN RAPID CITY, SD||Hail||1.75 INCH|
|06:30 pm CDT||9 SW FARMINGDALE, SD||Hail||1.75 INCH|
|07:37 pm CDT||5 E PORCUPINE, SD||Hail||1.75 INCH|
|04:45 pm CDT||DWTN SPEARFISH, SD||Hail||1.75 INCH|
|05:24 pm CDT||1 NNW PIEDMONT, SD||Hail||1.50 INCH|
|09:40 pm CDT||4 S HOVEN, SD||Hail||1.25 INCH|
|05:53 pm CDT||1 SSW RAPID VALLEY, SD||Hail||1.25 INCH|
|05:50 pm CDT||5 NE ROCKERVILLE, SD||Hail||1.25 INCH|
|05:22 pm CDT||1 NNW SUMMERSET, SD||Hail||1.25 INCH|
|07:45 pm CDT||6 NE MAHTO, SD||Hail||1.00 INCH|
|05:30 pm CDT||SUMMERSET, SD||Hail||1.00 INCH|
|06:40 pm CDT||5 ENE CUSTER, SD||Hail||1.00 INCH|
|05:51 pm CDT||4 NE ROCKERVILLE, SD||Hail||1.00 INCH|
|06:00 pm CDT||7 SW RAPID CITY ARPT, SD||Hail||1.00 INCH|
|04:51 pm CDT||1 S DWTN SPEARFISH, SD||Hail||1.00 INCH|
|04:40 pm CDT||9 W DWTN SPEARFISH, SD||Hail||1.00 INCH|