A multiple day heavy rainfall event will begin to set up from the Southern Plains into the Mississippi Valley Thursday, peaking in intensity over the holiday weekend. Widely scattered thunderstorms are expected to develop across eastern Colorado Thursday afternoon and evening. Large hail will be the primary hazard. Read More >
Overview
During the evening of July 27, 2018, a supercell thunderstorm tracked southeast across Oglala Lakota County, producing large wind-driven hail that resulted in extensive damage to homes, vehicles, and crops. 300 or more homes and over 100 vehicles sustained damage. There were minor injuries reported from broken glass. 3.25 inch hail (between baseball and softball size) and winds of 80 mph were reported.
This story will be updated as additional information is received.
Damage Photos
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Radar
The first image below is a radar animation of when the severe hailstorm was moving through Oglala Lakota County. The second image is an accumulation of the maximum radar reflectivity values from about 2:30 pm to 8:30 pm MDT on July 27, 2018. Note the very intense (red, purple, and white) colors from north of Hulett, Wyoming, across the Black Hills and then through the Oglala and Pine Ridge areas.
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
------ ----------------------- -- -------------- -------
3.25 6 SE OGLALA SD OGLALA LAKOTA 0746 PM
1.75 PINE RIDGE SD OGLALA LAKOTA 0755 PM
1.75 1 S OGLALA SD OGLALA LAKOTA 0734 PM
1.75 8 W DOWNTOWN SPEARFISH SD LAWRENCE 0425 PM
HAIL BROKE OUT WINDOWS ON THE HOUSE AND
VEHICLES
1.50 PINE RIDGE SD OGLALA LAKOTA 0751 PM
1.50 1 NE OGLALA SD OGLALA LAKOTA 0735 PM
1.50 5 W DOWNTOWN SPEARFISH SD LAWRENCE 0431 PM
1.25 9 W DOWNTOWN SPEARFISH SD LAWRENCE 0428 PM
1.00 1 ESE PINE RIDGE SD OGLALA LAKOTA 0759 PM
1.00 1 ENE PRINGLE SD CUSTER 0628 PM
HAIL COVERING GROUND.
1.00 2 W HERMOSA SD CUSTER 0611 PM
1.00 4 N SILVER CITY SD PENNINGTON 0527 PM
AT LEAST AN INCH OF HAIL ON GROUND.
1.00 6 S DEADWOOD SD LAWRENCE 0505 PM
1.00 1 WNW DOWNTOWN SPEARFIS SD LAWRENCE 0434 PM
1.00 2 NW DOWNTOWN SPEARFISH SD LAWRENCE 0430 PM
1.00 6 ENE ALADDIN WY CROOK 0401 PM
1.00 SAINT FRANCIS SD TODD 0400 PM
1.00 14 WNW COLONY WY CROOK 0305 PM
TSTM WIND REPORTS LISTED BY SPEED (MPH)
SPEED LOCATION ST COUNTY TIME
------ ----------------------- -- -------------- -------
80.00 OGLALA SD OGLALA LAKOTA 0733 PM
70.00 1 ESE PINE RIDGE SD OGLALA LAKOTA 0759 PM
70.00 3 SE FAIRBURN SD CUSTER 0641 PM
60.00 22 SSW SPOTTED HORSE WY CAMPBELL 0815 PM
60.00 1 S OGLALA SD OGLALA LAKOTA 0734 PM
60.00 14 SSW RED SHIRT SD OGLALA LAKOTA 0704 PM
60+ MPH GUSTS.
60.00 10 WSW HILL CITY SD PENNINGTON 0530 PM
60.00 9 W DOWNTOWN SPEARFISH SD LAWRENCE 0428 PM
60.00 1 N BEULAH WY CROOK 0420 PM
59.00 DOWNTOWN SPEARFISH SD LAWRENCE 0437 PM
58.00 4 N SILVER CITY SD PENNINGTON 0523 PM
52.00 5 NNW DOWNTOWN GILLETTE WY CAMPBELL 0851 PM
50.00 14 WNW COLONY WY CROOK 0305 PM
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