Strong thunderstorms over western and central Pennington County dumped three to four inches of rain during the evening and overnight hours of June 23-24. Runoff from the heavy rain caused areas of flooding along streams.
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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 UNR wrote it up.
Strong thunderstorms over western and central Pennington County dumped three to four inches of rain during the evening and overnight hours of June 23-24. Runoff from the heavy rain caused areas of flooding along streams.
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 Rapid City, SD wrote its last area forecast discussion before the first event at Jun 24, 4:26 AM MST, 2 hours 34 minutes earlier.
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY NATIONAL WEATHER SERVICE RAPID CITY SD 526 AM MDT WED JUN 24 2015 .SHORT TERM...TODAY THROUGH THURSDAY NIGHT ISSUED AT 520 AM MDT WED JUN 24 2015 CLUSTER OF THUNDERSTORMS CURRENTLY OVER SOUTHWESTERN AND SOUTH CENTRAL SOUTH DAKOTA WILL CONTINUE TO MOVE EAST DURING THE EARLY MORNING...MOVING EASTWARD OUT OF THE FORECAST AREA LATER THIS MORNING. THE NEXT DISTURBANCE WILL FOLLOW CLOSE BEHIND...WITH ANOTHER ROUND OF SCATTERED SHOWERS AND THUNDERSTORMS ENTERING NORTHWESTERN SOUTH DAKOTA AND NORTHEASTERN WYOMING AROUND MID MORNING. SOME SUN MAY DEVELOP BY THE EARLY AFTERNOON...WITH HIGHS IN THE MID 70S TO LOWER 80S. TIMING OF THE NEXT DISTURBANCE IS STILL A BIT UNCERTAIN...BUT SHOULD GENERALLY CROSS THE AREA DURING THE LATER AFTERNOON AND EARLY EVENING HOURS...WITH WHAT LOOKS TO BE A MORE FAVORABLE SETUP FOR STRONGER AND MORE WIDESPREAD STORMS INTO TONIGHT. SEVERE THUNDERSTORMS WILL BE POSSIBLE AGAIN THIS AFTN/EVN WITH STRONG WINDS AND LARGE HAIL THE MAIN THREATS. THE SETUP REMAINS MUCH THE SAME FOR THURSDAY WITH A RELATIVELY STRONG IMPULSE CREATING ANOTHER CHANCE SHOWERS AND THUNDERSTORMS. .LONG TERM...FRIDAY THROUGH TUESDAY ISSUED AT 251 AM MDT WED JUN 24 2015 THE BROAD HIGH AMPLITUDE UPPER RIDGE WILL CONTINUE BUILDING OVER THE WESTERN CONUS ON FRIDAY. A WEAK DISTURBANCE IN THE UPPER FLOW WILL CREATE A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS OVER WESTERN AND CENTRAL SOUTH DAKOTA ON FRIDAY. THE UPPER RIDGE WILL CONTINUE TO STRENGTHEN OVER THE WEEKEND...BRINGING DRIER WEATHER INTO EARLY NEXT WEEK. ALTHOUGH MAINLY DRY WEATHER IS EXPECTED FROM THE WEEKEND INTO EARLY NEXT WEEK...A FEW SHORTWAVES ROUNDING THE UPPER RIDGE MAY BE STRONG ENOUGH TO PRODUCE ISOLATED STORMS...MAINLY ACROSS THE BLKHLS. WARMER TEMPS ARE EXPECTED WITH HIGHS REGULARLY REACHING THE 80S. && .AVIATION...FOR THE 12Z TAFS THROUGH 12Z THURSDAY MORNING ISSUED AT 518 AM MDT WED JUN 24 2015 SHOWERS AND THUNDERSTORMS CURRENTLY OVER SOUTHWESTERN AND SOUTH CENTRAL SOUTH DAKOTA WILL CONTINUE TO MOVE EASTWARD THIS MORNING. THE SHOWERS AND THUNDERSTORMS WILL MOVE OFF TO THE SOUTHEAST OF THE FORECAST AREA BY MID MORNING AS ANOTHER WAVE OF SHOWERS AND THUNDERSTORMS MOVES OUT OF SOUTHEASTERN MONTANA AND INTO FAR NORTHEASTERN WYOMING AND NORTHWESTERN SOUTH DAKOTA WHICH WILL SPREAD SCATTERED SHOWERS AND THUNDERSTORMS ACROSS THE REST OF THE AREA DURING THE AFTERNOON. MVFR CIGS/VSBYS CAN BE EXPECTED NEAR ANY SHOWERS OR THUNDERSTORMS. && .UNR WATCHES/WARNINGS/ADVISORIES... SD...NONE. WY...NONE. && SHORT TERM...10 LONG TERM...10 AVIATION...10
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RAPID CITY SD 328 AM MDT WED JUN 24 2015 SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058- 071-251400- HARDING-PERKINS-BUTTE-NORTHERN MEADE CO PLAINS-ZIEBACH- NORTHERN BLACK HILLS-NORTHERN FOOT HILLS-RAPID CITY- SOUTHERN FOOT HILLS-CENTRAL BLACK HILLS-SOUTHERN BLACK HILLS- CUSTER CO PLAINS-PENNINGTON CO PLAINS-HAAKON-FALL RIVER-SHANNON- JACKSON-BENNETT-MELLETTE-TODD-TRIPP-STURGIS/PIEDMONT FOOT HILLS- SOUTHERN MEADE CO PLAINS-HERMOSA FOOT HILLS-NORTHERN CAMPBELL- SOUTHERN CAMPBELL-WESTERN CROOK-WYOMING BLACK HILLS-WESTON- NORTHEASTERN CROOK- 328 AM MDT WED JUN 24 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN SOUTH DAKOTA AND NORTHEASTERN WYOMING. .DAY ONE...TODAY AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER MUCH OF THE AREA AGAIN LATER THIS AFTERNOON. LARGE HAIL AND DAMAGING WIND GUSTS WILL BE POSSIBLE WITH THESE STORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY ADDITIONAL WEATHER DISTURBANCES WILL BRING CHANCES FOR THUNDERSTORMS THROUGH AT LEAST FRIDAY...WITH STRONGER STORMS POSSIBLE AT TIMES. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER NORTHEASTERN WYOMING AND SOUTHWESTERN SOUTH DAKOTA AGAIN ON THURSDAY. LARGE HAIL AND STRONG WIND GUSTS WILL BE THE MAIN THREATS FROM ANY SEVERE STORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY. && STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES... OR CHECK OUR WEB SITE AT WEATHER.GOV/RAPIDCITY
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
224 AM MDT WED JUN 24 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0223 AM HAIL DOWNTOWN NEWCASTLE 43.85N 104.20W
06/24/2015 E1.00 INCH WESTON WY TRAINED SPOTTER
&&
MEPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
229 AM MDT WED JUN 24 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0100 AM HAIL 25 SW UPTON 43.85N 104.98W
06/24/2015 E0.88 INCH WESTON WY TRAINED SPOTTER
&&
MESPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
419 AM MDT WED JUN 24 2015
SDZ042-044-241100-
SHANNON SD-BENNETT SD-
419 AM MDT WED JUN 24 2015
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BENNETT AND
SOUTHEASTERN SHANNON COUNTIES UNTIL 500 AM MDT...
AT 419 AM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
BATESLAND...OR 18 MILES EAST OF PINE RIDGE...MOVING EAST AT 40 MPH.
NICKEL SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH
THIS STORM.
LOCATIONS IMPACTED INCLUDE...
BATESLAND AND SOUTHWESTERN LACREEK WILDLIFE REFUGE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.
&&
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM MDT FOR
SOUTHWESTERN SOUTH DAKOTA.
LAT...LON 4303 10229 4306 10230 4317 10228 4316 10171
4310 10169 4300 10169 4300 10209
TIME...MOT...LOC 1019Z 278DEG 36KT 4311 10221
RUDGEThe national radar mosaic for the moment the first event began.
3 flood. Local standard time, as filed.
Runoff from heavy rain caused flooding along Spring Creek between US Highway 16 and SD Highway 79.
Runoff from heavy rain caused flooding along Spring Creek between Hill City and Sheridan Lake.
Runoff from heavy rain caused flooding in Rapid Valley. Green Valley Drive was flooded for a quarter of a mile and Anderson Road was impassable. Flooding was also observed at two gauging stations along Rapid Creek. The river gauge near Rapid Valley crested 2.1 feet over flood stage and the river gauge at Farmingdale crested 0.9 feet over flood stage.
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, June 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: 590962, 590965, 590961.