Heavy rainfall from scattered thunderstorms is expected across the Southwest, Intermountain West, and Plains. Isolated dry thunderstorms may initiate additional fires across the west. The coastal Carolinas may experience flash floods in the coming days due to repeated thunderstorms. Additionally, a wave of intense summer heat will hit the Southern Plains and central Gulf Coast States this week. Read More >
Overview
June 27, 2017 - Thunderstorms developed across northeastern Wyoming in the afternoon and strengthened as they moved into South Dakota. The storms produced very strong winds, which caused damage across the area. The Rapid City Airport measured a gust of 75 mph while the Custer County airport recorded a gust of 69 mph, one of the strongest ever at that location. Some hail accompanied these storms, with quarter-sized the largest reported. Below are photos of tree damage, the radar loop, and the list of storm reports.
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| Rapid Valley | Rapid Valley | South of Custer | South of Custer |
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| 1 E Downtown Rapid City | Custer | Custer | West Rapid |
Radar:
Six-hour Loop of the Event
Storm Reports
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 ------ ----------------------- -- -------------- ------- 1.00 PORCUPINE SD OGLALA LAKOTA 0527 PM TSTM WIND REPORTS LISTED BY SPEED (MPH) SPEED LOCATION ST COUNTY TIME ------ ----------------------- -- -------------- ------- 75.00 RAPID CITY AIRPORT SD PENNINGTON 0541 PM 70.00 6 NE OTTUMWA SD HAAKON 0708 PM 70.00 7 SW RAPID CITY AIRPORT SD PENNINGTON 0542 PM 69.00 2 SSW DOWNTOWN CUSTER SD CUSTER 0457 PM 67.00 2 E COTTONWOOD SD JACKSON 0630 PM 66.00 9 NNE EDGEMONT SD FALL RIVER 0457 PM 65.00 8 WSW HILL CITY SD PENNINGTON 0505 PM 65.00 10 SW DOWNTOWN GILLETTE WY CAMPBELL 0501 PM 64.00 4 S DOWNTOWN RAPID CITY SD PENNINGTON 0525 PM 63.00 9 NE KIRLEY SD HAAKON 0728 PM 62.00 5 NE PORCUPINE SD OGLALA LAKOTA 0600 PM 62.00 ELLSWORTH AFB SD MEADE 0544 PM 62.00 8 WNW FAIRBURN SD CUSTER 0517 PM 62.00 9 WSW HILL CITY SD PENNINGTON 0449 PM 61.00 4 NNE ANGOSTURA RESERVOIRSD FALL RIVER 0452 PM 61.00 8 W JEWEL CAVE SD CUSTER 0444 PM 60.00 2 SSE CACTUS FLAT SD JACKSON 0615 PM 60.00 4 N ROZET WY CAMPBELL 0541 PM 60.00 4 N DOWNTOWN RAPID CITY SD PENNINGTON 0537 PM 60.00 3 WSW FAIRBURN SD CUSTER 0508 PM 59.00 3 E PHILIP SD HAAKON 0652 PM 56.00 25 ESE WRIGHT WY CAMPBELL 0330 PM 55.00 3 S HILL CITY SD PENNINGTON 0510 PM 55.00 2 SSW ORAL SD FALL RIVER 0505 PM 52.00 3 ESE PINE RIDGE SD OGLALA LAKOTA 0456 PM 50.00 2 W HAYWARD SD PENNINGTON 0520 PM 49.00 1 SE DOWNTOWN NEWCASTLE WY WESTON 0427 PM
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