An isolated severe thunderstorm brought large hail along with seventy mph winds to parts of Stanley county.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS ABR wrote it up.
An isolated severe thunderstorm brought large hail along with seventy mph winds to parts of Stanley county.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Aberdeen, SD wrote its last area forecast discussion before the first event at Aug 8, 1:18 PM MST, 2 hours 47 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ABERDEEN SD 318 PM CDT SAT AUG 8 2015 .SHORT TERM...(THIS EVENING THROUGH MONDAY AFTERNOON) ISSUED AT 317 PM CDT SAT AUG 8 2015 STALLED/WASHED OUT FRONT RUNS ACROSS THE CWA FROM EAST TO WEST. NAM INDICATES WE SHOULD BE CLOSE TO THE CONVECTIVE TEMPERATURE...WITH UPWARDS OF 2000 J/KG CAPE AND 30 TO 40KT 0-6KT MAINLY UNIDIRECTIONAL SHEAR AT KATY. WE LACK UPPER SUPPORT THOUGH...AND THAT IS LIKELY WHY A CAMS ARE MAINLY DRY WITH A FEW ISOLATED/WEAK CELLS DEPICTED ALONG THE FRONT...ALONG AND EAST OF THE COTEAU. MAIN FOCUS IS ON THE WAVE MOVING ACROSS THE ROCKIES THIS AFTERNOON...EJECTING INTO THE DAKOTAS THIS EVENING/OVERNIGHT...DRIFTING ACROSS THE FORECAST AREA SUNDAY...AND FINALLY HEADING SOUTHEAST SUNDAY NIGHT AS IT ROUNDS THE RIDGE AND IS INTEGRATED INTO NORTHWEST FLOW. CAMS ALL SUGGEST SOME FORM OF MCS MOVING ACROSS THE CWA LATE THIS EVENING/OVERNIGHT...AND WHILE THERE IS LITTLE EVIDENCE FOR LOW LEVEL JET SUPPORT...THE LEFT EXIT REGION OF A 70KT JET MAY BE SUFFICIENT TO SUPPORT THIS OUTCOME. REMNANT CONVECTION WILL CONTINUE INTO THE MORNING HOURS AND CONVECTIVE DEBRIS MAY LIMIT INSTABILITY SUNDAY. IS THIS IS NOT THE CASE...THEN WE COULD SEE A PERIOD IN THE EARLY AFTERNOON WITH CONVECTIVE DEVELOPMENT BEFORE STORMS SINK SOUTHEAST AND OUT OF THE CWA. MLCAPE VALUES ARE AGAIN AROUND 2000J/KG...ALTHOUGH 0-6KM SHEAR IS CLOSER TO 40 TO 50KTS...ALONG WITH MORE DIRECTIONAL SHEAR. COOLER AIR FOLLOWS FOR MONDAY AM...ALTHOUGH A FEW SHOWERS MAY STRAGGLE OVER THE CWA AS THE UPPER WAVE IS SLOW MOVING. HIGH PRESSURE DOMINATES THE REST OF THE PERIOD. .LONG TERM...(MONDAY EVENING THROUGH SATURDAY) ISSUED AT 317 PM CDT SAT AUG 8 2015 VERY GOOD AGREEMENT WITH THE MODELS DURING THE LONG TERM WITH THE UPPER LEVEL FLOW PATTERN. THE PERIOD BEGINS WITH A LARGE UPPER LEVEL HIGH PRESSURE AREA OVER THE SOUTHERN US WITH A RIDGE AXIS EXTENDING NORTHWARD INTO CANADA AND A LARGE UPPER LEVEL LOW PRESSURE AREA OFF THE WEST COAST. THIS HIGH PRESSURE AREA AND RIDGE WILL MOVE VERY LITTLE THROUGH THE WEEK WITH SOME BUILDING HEIGHTS/WARMER AIR PUSHING INTO OUR REGION. WITH GENERAL SUBSIDENCE OVER OUR REGION...SKIES SHOULD BE MOSTLY CLEAR/MOSTLY SUNNY WITH ABOVE NORMAL TEMPERATURES MAINLY IN THE MID 80S TO THE LOWER 90S. THE MODELS SHOW THE UPPER LOW PRESSURE AREA OFF THE WEST COAST LIFTING NORTHEAST...OPENING UP AND WEAKENING AS IT MOVES INTO SOUTHERN CANADA LATE IN THE PERIOD. THIS WILL KNOCK THE RIDGE DOWN OVER OUR REGION ALONG WITH BRINGING A SURFACE FRONT IN FROM THE WEST FRIDAY NIGHT AND SATURDAY BRINGING BACK SOME CHANCES OF SHOWERS AND STORMS. && .AVIATION...(FOR THE 18Z TAFS THROUGH 18Z SUNDAY AFTERNOON) ISSUED AT 1245 PM CDT SAT AUG 8 2015 A WEAK SURFACE FRONTAL BOUNDARY EXTENDING SOUTHWEST TO NORTHEAST ACROSS THE REGION WILL HAVE MAINLY MID AND HIGH LEVEL CLOUDS OVERRUNNING IT THROUGH THE AFTERNOON AND NIGHT ALONG WITH A FEW HIGH BASED SHOWERS AND STORMS. AN UPPER LEVEL SHORT WAVE TROUGH MOVING IN FROM WEST THIS EVENING THROUGH SUNDAY MORNING WILL BRING IN BETTER CHANCES OF SHOWERS/STORMS WHICH MAY AFFECT ALL TAF LOCATIONS. DID NOT PUT ANY SHOWERS AND STORMS IN THE TAFS AT THIS TIME. && .ABR WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. && SHORT TERM...CONNELLY LONG TERM...MOHR AVIATION...MOHR
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ABERDEEN SD 420 AM CDT SAT AUG 8 2015 MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-090930- TRAVERSE-BIG STONE-CORSON-CAMPBELL-MCPHERSON-BROWN-MARSHALL- ROBERTS-WALWORTH-EDMUNDS-DAY-DEWEY-POTTER-FAULK-SPINK-CLARK- CODINGTON-GRANT-HAMLIN-DEUEL-STANLEY-SULLY-HUGHES-HYDE-HAND-JONES- LYMAN-BUFFALO- 420 AM CDT SAT AUG 8 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL MINNESOTA...CENTRAL SOUTH DAKOTA...NORTH CENTRAL SOUTH DAKOTA AND NORTHEAST SOUTH DAKOTA. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS ARE POSSIBLE TODAY ALONG AND EAST OF A LINE FROM SISSETON TO CLARK. SEVERE STORMS ARE NOT EXPECTED. ADDITIONAL THUNDERSTORMS ARE POSSIBLE TONIGHT...MAINLY FOR LOCATIONS WEST OF THE JAMES RIVER VALLEY. SOME THUNDERSTORMS COULD PRODUCE GUSTY WINDS AND SMALL HAIL. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY SCATTERED THUNDERSTORMS ARE POSSIBLE OF SUNDAY. SOME THUNDERSTORMS COULD PRODUCE GUSTY WINDS AND SMALL HAIL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. SD
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ABERDEEN SD 431 PM MDT SAT AUG 8 2015 SDZ033-082300- STANLEY SD- 431 PM MDT SAT AUG 8 2015 ...SPECIAL WEATHER STATEMENT... AT 431 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR HAYES...OR 30 MILES WEST OF FORT PIERRE...MOVING NORTH AT 30 MPH. HALF INCH HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... BUNKER...BROWN CHURCH...SANSARC AND HAYES. LAT...LON 4418 10089 4423 10113 4459 10103 4437 10068 TIME...MOT...LOC 2231Z 198DEG 26KT 4428 10098 TDK
The Rapid City radar (KUDX), 156 km away, was scanning. The volume nearest the first event began at 23:07 UTC.
2 thunderstorm wind, 1 hail. Local standard time, as filed.
Sixty mph winds broke off several tree branches along with taking some shingles off of the house.
Seventy mph winds were estimated.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2015Every state in 2015This day in weather historyWarnings in South Dakota, August 2015
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 600084, 600083, 600085.