A severe thunderstorm produced hail to quarter size over far southeastern Campbell County.
Every event with a place to put it. Tap one for its entry below.
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.
A severe thunderstorm produced hail to quarter size over far southeastern Campbell 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 Rapid City, SD wrote its last area forecast discussion before the first event at May 29, 1:56 PM MST, 1 hour 40 minutes earlier.
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY NATIONAL WEATHER SERVICE RAPID CITY SD 256 PM MDT THU MAY 29 2014 .SHORT TERM...THIS EVENING THROUGH FRIDAY NIGHT ISSUED AT 255 PM MDT THU MAY 29 2014 WATER VAPOR SHOWS UPPER RIDGE EXTENDING FROM THE CNTRL PLAINS INTO THE UPPER MIDWEST...WITH DEEP TROF ALONG THE WEST COAST. DISTINCT SHORT WAVE IS NOTED MOVING OUT OF THE FOUR CORNERS IN SW FLOW. AT THE SFC...BOUNDARY EXTENDS FROM NWRN SD INTO THE BLKHLS AND IS DRIFTING EWD. THIS AFTN/TONIGHT...MLCAPE VALUES OF 2000-3000 J/KG EXIST EAST OF THE SFC BOUNDARY BUT CAP HAS BEEN SLOW TO ERODE AND SHEAR VALUES NOT IMPRESSIVE. BETTER DEEP LAYER SHEAR IS NOTED BEHIND THE BOUNDARY WHERE A LITTLE LESS CAPE IS AVAILABLE. NOT A LOT OF UPPER SUPPORT EARLY ON...BUT SHOULD SEE SOME STORMS DEVELOP MID AFTN NEAR THE FRONT...WITH BETTER COVERAGE LIKELY LATER THIS AFTN INTO THE EVE HOURS AS UPPER SUPPORT FROM THE FOUR CORNERS ARRIVES. THERE WILL BE SOME SUPPORT FOR ROTATING UPDRAFTS...ESPECIALLY ALONG AND WEST OF THE BOUNDARY WHERE BETTER SHEAR EXTENDS. LARGE HAIL/STRONG WINDS GUSTS THE MAIN THREAT...BUT GIVEN MOISTURE POOLING NEAR THE BOUNDARY ALONG WITH PRETTY DECENT 0-1KM SRH...AN ISOLATED TORNADO POSSIBLE IN NWRN SD. HEAVY RAINS ALSO LIKELY GIVEN HIGHER PRECIPITABLE WATERS...BUT STORM MOVESMENT NOT PARTICULARY SLOW. ACTIVITY COULD FORM INTO AN MCS SO WILL KEEP RELATIVELY HIGH POPS THROUGH THE NIGHT. FRIDAY...UPPER RIDGE WILL HAVE SHIFTED FURTHER EAST WITH THE CWFA INTO DEEPER SW FLOW ALOFT...WITH A MORE POTENT UPPER WAVE ARRIVING IN THE AFTN. SHOULD SEE BEST CHANCES FOR SEVERE CONVECTION IN OUR ERN CWFA WITH SFC BOUNDARY SHIFTING TO OUR FAR ERN ZONES...WITH SOME QUESTION AS TO HOW MUCH INSTABILITY WILL RESIDE IN OUR WRN ZONES. TEMPS WILL BE QUITE A BIT COOLER RELATIVE TO THIS AFTN OVER ALL BUT OUR FAR ERN ZONES. && .LONG TERM...SATURDAY THROUGH THURSDAY ISSUED AT 255 PM MDT THU MAY 29 2014 SOUTHWEST FLOW ALOFT WILL CONTINUE THROUGH THE WEEKEND...AHEAD OF A LARGE UPPER TROF OVER THE WESTERN UNITED STATES. A SERIES OF DISTURBANCES WILL MOVE NORTHEAST ACROSS THE REGION...BRINGING GOOD CHANCES FOR SHOWERS AND THUNDERSTORMS. A DEVELOPING SURFACE LOW AND ASSOCIATED WARM FRONT WILL MOVE ACROSS THE AREA ON SATURDAY. THIS FEATURE...COMBINED WITH ABUNDANT MOISTURE IN PLACE...COULD PRODUCE SOME STRONG TO SEVERE STORMS ACROSS MOST OF THE FORECAST AREA SATURDAY AFTERNOON AND EVENING. THERE COULD BE A THREAT FOR STRONG TO SEVERE STORMS ON SUNDAY AS WELL...ESPECIALLY TO THE SOUTH AND EAST OF THE BLACK HILLS. AN UPPER LOW WITHIN THE TROF WILL TRACK ACROSS THE NORTHERN ROCKIES AND NORTHERN PLAINS SUNDAY NIGHT AND MONDAY...WITH THE BETTER FOCUS FOR PCPN LIKELY SHIFTING MORE TO NORTHERN AND EASTERN PORTIONS OF THE CWA DURING THAT TIME. AS THE LOW SHIFTS EAST OF THE REGION... THERE COULD BE A BRIEF BREAK IN PCPN CHANCES DURING THE TUESDAY TIMEFRAME...BUT MODELS ARE NOT IN AGREEMENT ON THAT. OTHERWISE...THE NEXT TROF WILL MOVE ACROSS THE WESTERN CONUS DURING MIDWEEK...WITH SHORTWAVE ENERGY AHEAD OF IT BRINGING ADDITIONAL CHANCES FOR STORMS WEDNESDAY AND THURSDAY. && .AVIATION...FOR THE 18Z TAFS THROUGH 18Z FRIDAY ISSUED AT 255 PM MDT THU MAY 29 2014 ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP NEAR A SLOW MOVING COLD FRONT MOVING INTO WESTERN SOUTH DAKOTA THIS AFTERNOON. THIS ACTIVITY WILL MOVE NORTHEAST ACROSS A GOOD PORTION OF THE FORECAST AREA THROUGH THE EVENING. ISOLATED SEVERE STORMS ARE POSSIBLE...ESPECIALLY FROM THE BLACK HILLS AREA INTO NORTHWESTERN SD. BRIEF MVFR CONDITIONS...HAIL...AND GUSTY WINDS ARE EXPECTED WITH ANY STRONGER STORMS. && .UNR WATCHES/WARNINGS/ADVISORIES... SD...NONE. WY...NONE. && SHORT TERM...JOHNSON LONG TERM...26 AVIATION...26
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RAPID CITY SD 105 PM MDT THU MAY 29 2014 SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058- 071-301400- BENNETT-BUTTE-CENTRAL BLACK HILLS-CUSTER CO PLAINS-FALL RIVER-HAAKON- HARDING-HERMOSA FOOT HILLS-JACKSON-MELLETTE-NORTHEASTERN CROOK- NORTHERN BLACK HILLS-NORTHERN CAMPBELL-NORTHERN FOOT HILLS- NORTHERN MEADE CO PLAINS-PENNINGTON CO PLAINS-PERKINS-RAPID CITY- SHANNON-SOUTHERN BLACK HILLS-SOUTHERN CAMPBELL-SOUTHERN FOOT HILLS- SOUTHERN MEADE CO PLAINS-STURGIS/PIEDMONT FOOT HILLS-TODD-TRIPP- WESTERN CROOK-WESTON-WYOMING BLACK HILLS-ZIEBACH- 105 PM MDT (205 PM CDT) THU MAY 29 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN SOUTH DAKOTA AND NORTHEASTERN WYOMING. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS ARE POSSIBLE ACROSS NORTHEAST WYOMING AND WESTERN SOUTH DAKOTA THIS AFTERNOON INTO TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS...ESPECIALLY FROM THE BLACK HILLS INTO NORTHWEST SOUTH DAKOTA. LARGE HAIL...DAMAGING WIND GUSTS...AND HEAVY RAINS ARE THE MAIN THREATS FROM ANY SEVERE THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THUNDERSTORMS ARE LIKELY FRIDAY AND SATURDAY. ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE ON FRIDAY...WITH A BETTER CHANCE OF ORGANIZED SEVERE THUNDERSTORMS ON SATURDAY. THERE IS CHANCE FOR THUNDERSTORMS SUNDAY THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE POSSIBLE TODAY. && STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES... OR CHECK OUR WEB SITE AT WEATHER.GOV/RAPIDCITY
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
306 PM MDT THU MAY 29 2014
WYZ058-292145-
WESTON WY-
306 PM MDT THU MAY 29 2014
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN WESTON COUNTY UNTIL
345 PM MDT...
AT 304 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 18 MILES SOUTHWEST OF UPTON...OR 32 MILES
NORTHEAST OF WRIGHT...MOVING NORTHEAST AT 30 MPH.
HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM.
LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
UPTON AND AREAS WEST OF UPTON IN NORTHWESTERN WESTON COUNTY...
THIS STORM MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN
EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV
STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.
&&
LAT...LON 4417 10483 4417 10447 4415 10447 4392 10496
4397 10504
TIME...MOT...LOC 2106Z 225DEG 27KT 4398 10492
TRIMARCHISPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
338 PM MDT THU MAY 29 2014
SDZ001-002-292215-
HARDING SD-PERKINS SD-
338 PM MDT THU MAY 29 2014
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN HARDING AND EXTREME
NORTHWESTERN PERKINS COUNTIES UNTIL 415 PM MDT...
AT 334 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR RALPH...OR 25 MILES NORTHEAST OF BUFFALO...
MOVING NORTHEAST AT 20 MPH.
HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN.
LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
RALPH...
THIS STORM MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN
EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV
STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.
&&
LAT...LON 4595 10299 4595 10282 4595 10281 4594 10281
4572 10309 4576 10319 4596 10309 4596 10300
TIME...MOT...LOC 2137Z 212DEG 16KT 4577 10310
TRIMARCHISPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RAPID CITY SD 421 PM MDT THU MAY 29 2014 WYZ057-058-292300- WESTON WY-WYOMING BLACK HILLS WY- 421 PM MDT THU MAY 29 2014 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN WESTON COUNTY UNTIL 500 PM MDT... AT 419 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7 MILES SOUTH OF UPTON...OR 25 MILES NORTHWEST OF DOWNTOWN NEWCASTLE...MOVING NORTHEAST AT 30 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... UPTON AND AREAS TO THE SOUTH AND EAST OF UPTON... THIS STORM MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. && LAT...LON 4418 10457 4418 10423 4393 10470 4400 10475 TIME...MOT...LOC 2220Z 223DEG 28KT 4401 10464 TRIMARCHI
The Rapid City radar (KUDX), 203 km away, was scanning. The volume nearest the first event began at 22:35 UTC.
1 lightning, 1 hail. Local standard time, as filed.
Lightning struck a truck at a coal mine, causing a tire to explode. The tire smashed through the wall of a nearby building and struck three people inside the building.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2014Every state in 2014This day in weather historyWarnings in Wyoming, May 2014
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: 514932, 514930.