A multi-day, potentially historic heavy rainfall event may produce catastrophic and life-threatening flooding through Saturday from the Ozarks into the Ohio River Valley. Several clusters of strong to severe storms are expected from the Southern Plains, Mid Mississippi Valley to the Ohio/Tennessee Valleys and the Mid Atlantic. Read More >
Overview
June 12, 2017 - During the evening, thunderstorms developed and moved into northeastern Wyoming and western South Dakota ahead of a strong low pressure system. Some of the storms produced wind gusts to 75 mph, and hail to 1.5 inches in diameter. A brief tornado was observed 4 miles WNW of Swett in Bennett County, but no damage was reported. Strong wind gusts tipped over a semi truck on I-90 near Kadoka.
Radar:
6 Hour Loop
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 ------ ----------------------- -- -------------- ------- 1.50 8 NNW PINE TREE JUNCTION WY CAMPBELL 0514 PM 1.00 2 N TUTHILL SD BENNETT 1201 AM 1.00 11 W ROCKYFORD SD OGLALA LAKOTA 0844 PM 1.00 8 E SMITHWICK SD FALL RIVER 0743 PM 1.00 10 ESE OELRICHS SD FALL RIVER 0710 PM 1.00 8 SSE SAVAGETON WY CAMPBELL 0515 PM TSTM WIND REPORTS LISTED BY SPEED (MPH) SPEED LOCATION ST COUNTY TIME ------ ----------------------- -- -------------- ------- 75.00 2 SSW KYLE SD OGLALA LAKOTA 0910 PM 65.00 3 E KYLE SD OGLALA LAKOTA 0920 PM 60.00 13 S RED SHIRT SD OGLALA LAKOTA 1145 PM 60.00 TUTHILL SD BENNETT 1135 PM 60.00 10 NE ARDMORE SD FALL RIVER 1058 PM 60.00 13 NW SLIM BUTTE SD OGLALA LAKOTA 0715 PM RAIN AMOUNTS (INCHES) AMOUNT LOCATION ST COUNTY TIME ------ ----------------------- -- -------------- ------- 1.60 HERMOSA SD CUSTER 0600 AM 1.40 14 S REVA SD HARDING 0609 AM 1.36 5 E PORCUPINE SD OGLALA LAKOTA 0600 AM 1.12 4 W DOWNTOWN HOT SPRING SD FALL RIVER 0600 AM 1.09 3 ENE NEWELL SD BUTTE 0600 AM 0.90 9 WSW RED ELM SD ZIEBACH 0600 AM 0.74 11 ENE WANBLEE SD JACKSON 0600 AM
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