A stationary thunderstorm produced several inches of rain in less than two hours along the Johnson-Campbell County line. Officials closed Interstate 90 after water and debris covered the highway between Gillette and Buffalo.
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 stationary thunderstorm produced several inches of rain in less than two hours along the Johnson-Campbell County line. Officials closed Interstate 90 after water and debris covered the highway between Gillette and Buffalo. Another small thunderstorm produced a brief tornado near Savageton and other severe thunderstorms produced wind gusts around 60 mph.
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 3, 4:33 PM MST, 1 hour 47 minutes earlier.
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY NATIONAL WEATHER SERVICE RAPID CITY SD 533 PM MDT WED JUN 3 2015 .SHORT TERM...THIS EVENING THROUGH THURSDAY NIGHT ISSUED AT 340 PM MDT WED JUN 3 2015 CURRENT SURFACE ANALYSIS SHOWS COOL FRONT SOUTH OF THE REGION NOW...ACROSS THE CENTRAL PLAINS INTO THE CENTRAL ROCKIES. HIGH PRESSURE IS CENTERED OVER SOUTH CENTRAL CANADA. UPPER LEVEL ANALYSIS CONTINUES TO SHOW WEAK RIDGING OVER THE PLAINS...WITH LONG WAVE TROF ALONG THE WEST COAST. WEST-SOUTHWEST FLOW REMAINS IN PLACE ACROSS THE ROCKIES AND HIGH PLAINS. THE NEXT DISTURBANCE IS NOTED ON WATER VAPOR ACROSS SOUTHERN WY AND NORTHERN CO. SKIES ARE PARTLY TO MOSTLY CLOUDY ACROSS THE AREA. REGIONAL RADARS SHOW STORMS DEVELOPING ACROSS THE HIGHER TERRAIN OF WY...BUT STILL HAVING A HARD TIME GETTING OFF THE MOUNTAINS AT THIS TIME. TEMPS ARE MOSTLY IN THE MID 60S TO MID 70S. GENERAL UNSETTLED PATTERN WILL CONTINUE FOR THE NEXT SEVERAL DAYS AS A WESTERN CONUS TROF REMAINS IN PLACE AND SENDS DISTURBANCES ACROSS THE REGION THROUGH AT LEAST THE WEEKEND. THE FIRST OF THESE DISTURBANCES WILL MOVE ACROSS THE CENTRAL ROCKIES AND NORTHERN HIGH PLAINS TONIGHT. SHOWERS AND THUNDERSTORMS WILL INCREASE IN COVERAGE FROM SOUTHWEST TO NORTHEAST TONIGHT. THE MAIN DYNAMICS WITH THIS WAVE WILL MOVE ACROSS EASTERN WY...SOUTHEAST MT...AND INTO NORTHWEST SD LATE TONIGHT. THE BEST CHANCES FOR PCPN WILL BE OVER NORTHEAST WY INTO PORTIONS OF NORTHWEST SD OVERNIGHT/EARLY THURSDAY. THE BEST INSTABILITY AT THIS TIME AND INTO THE EVENING WILL BE OVER NORTHEAST WY...WHERE A TORNADO WATCH IS NOW IN EFFECT THROUGH THE EARLY EVENING. LARGE HAIL AND STRONG WIND GUSTS CAN BE EXPECTED WITH ANY SEVERE STORMS...WITH AN ISOLATED TORNADO ALSO POSSIBLE. ANOTHER CONCERN IS LOCALLY HEAVY RAINFALL IF SUPERCELLS DEVELOP...ESPECIALLY OVER THE CAMPBELL COUNTY WY AREA...WHERE MOTION IS PROJECTED TO BE VERY SLOW. WEAKER ENERGY ALOFT WILL INTERACT WITH THE FRONT AND STRONGER INSTABILITY TO THE SOUTH OF THE CWA TONIGHT...BRINGING AN EXPECTED MCS ACROSS NEB OVERNIGHT AS ACTIVITY MOVES OUT OF CO AND WY. SCATTERED SHOWERS AND THUNDERSTORMS CAN BE EXPECTED ACROSS MUCH OF THE CWA LATER TONIGHT INTO THURSDAY MORNING. A WEAK DISTURBANCE WILL CROSS THE AREA THURSDAY AFTERNOON AND EVENING...WITH ISOLATED TO SCATTERED SHOWERS AND STORMS EXPECTED. INSTABILITY WILL BE SUFFICIENT ENOUGH FOR POTENTIAL STRONG TO SEVERE STORMS OVER AT LEAST NORTHEAST WY AND SOUTHWEST SD IF THERE IS ENOUGH HEATING DURING THE DAY. HIGHS WILL BE IN THE 60S AND LOWER 70S. .LONG TERM...FRIDAY THROUGH WEDNESDAY ISSUED AT 340 PM MDT WED JUN 3 2015 UPPER LOW EXPECTED OVER THE WESTERN US BY THE END OF THE WEEK LEAVING SPLIT FLOW WITH ACTIVE NORTHERN STREAM. LOW LEVEL BAROCLINIC ZONE WILL BE DRAPED ACROSS MT INTO WY/SD THROUGH THE PERIOD WHICH WILL BE THE FOCUS FOR ACTIVE/SEVERE THUNDERSTORMS AT LEAST THROUGH SATURDAY AS SEVERAL DISTURBANCES MOVE THROUGH. SYSTEM WEAKENS AS UPPER LEVEL RIDGE SLOWLY MOVES INTO THE AREA FOR EARLY NEXT WEEK...WITH DIMINISHING TSRA CHANCES AND WARMING TEMPERATURES. && .AVIATION...(FOR THE 00Z TAFS THROUGH 00Z THURSDAY EVENING) ISSUED AT 528 PM MDT WED JUN 3 2015 MVFR CIGS WILL PERSIST THIS EVE JUST NORTHEAST OF BLACK HILLS. SHRA/TSRA WILL DEVELOP OVER NERN WY BY EARLY EVENING...THEN SPREAD THROUGH WRN SD AROUND MIDNIGHT WITH AREAS OF MVFR/IFR CONDITIONS IN HEAVIER PCPN. RATHER WDSPRD MFVR/IFR STRATUS EXPECTED TO DEVELOP OVER MUCH OF THE AREA LATER TONIGHT AND PERSIST INTO THURSDAY MRNG BEFORE DISSIPATING. && .UNR WATCHES/WARNINGS/ADVISORIES... SD...NONE. WY...NONE. && SHORT TERM...26 LONG TERM...HELGESON AVIATION...JOHNSON
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RAPID CITY SD 730 AM MDT WED JUN 3 2015 SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058- 071-041300- 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- 730 AM MDT WED JUN 3 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN SOUTH DAKOTA AND NORTHEASTERN WYOMING. .DAY ONE...TODAY AND TONIGHT THERE IS A CHANCE FOR SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING...WITH A SLIGHT RISK OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING STRONG WINDS AND LARGE HAIL ACROSS NORTHEASTERN WYOMING AND FAR SOUTHWESTERN SOUTH DAKOTA. HIGH STREAM FLOWS WITH SOME MINOR FLOODING WILL CONTINUE ON SOME CREEKS AND STREAMS IN THE BLACK HILLS AND THE ADJACENT PLAINS. SOME OF THE STORMS TODAY AND TONIGHT MAY PRODUCE HEAVY RAIN...WHICH COULD AGGRAVATE FLOODING CONDITIONS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THERE IS A CHANCE OF SHOWERS AND THUNDERSTORMS OVER VARIOUS PARTS OF THE AREA EACH DAY FROM THURSDAY THROUGH TUESDAY. STRONG TO SEVERE STORMS MAY BE POSSIBLE THURSDAY...AND HEAVY RAIN MAY WORSEN FLOODING CONDITIONS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY. && STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES... OR CHECK OUR WEB SITE AT WEATHER.GOV/RAPIDCITY
The Riverton/Lander radar (KRIW), 233 km away, was scanning. The volume nearest the first event began at 01:19 UTC.
2 thunderstorm wind, 1 tornado, 1 flash flood, 1 flood. Local standard time, as filed.
A small tornado was briefly observed by a fire fighter and the public.
Runoff from heavy rain and debris flowed over Interstate 90 from mile markers 90 to 91 between Gillette and Buffalo. Water and large pieces of debris also covered several portions of the Buffalo Cut-Across Road west of Gillette and washed gravel off the road.
Gravel was washed off the Buffalo Cut Across Road west of Gillette.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2015Every state in 2015This day in weather historyThe tornado archive for Wyoming, 2015Warnings in Wyoming, 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: 586835, 592382, 586833, 586834, 570125.