During the early to mid evening hours of Wednesday, June 30th, Severe Thunderstorm Watch number 434 was issued for southwest and west central North Dakota. Strong to severe storms over southeast Montana were expected to advect into North Dakota.
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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 BIS wrote it up.
During the early to mid evening hours of Wednesday, June 30th, Severe Thunderstorm Watch number 434 was issued for southwest and west central North Dakota. Strong to severe storms over southeast Montana were expected to advect into North Dakota. These thunderstorms were associated with a weak mid level wave lifting northeast into the Northern Plains. The watch was later expanding to include north central North Dakota as a nocturnal low level jet developed and intensified across the Dakotas, helping to sustain severe convection into the early morning hours of Thursday, July 1st.
Multiple severe thunderstorm warnings were issued. Numerous reports of severe thunderstorm wind gusts were received Wednesday evening.
Please see the storm data entry for July 1st for additional reports related to this episode.
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 Bismarck, ND wrote its last area forecast discussion before the first event at Jun 30, 6:47 PM MST, 41 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BISMARCK ND 847 PM CDT WED JUN 30 2010 .UPDATE... RECENT MOIST AIR ADVECTION AND NORTHEASTWARD TRANSLATION OF SEVERE STORMS HAVE PROMPTED ISSUANCE OF A SEVERE THUNDERSTORM WATCH ACROSS PORTIONS OF WESTERN NORTH DAKOTA. && .PREV DISCUSSION... /ISSUED 315 PM CDT WED JUN 30 2010/ SHORT TERM...TONIGHT THROUGH SATURDAY NIGHT... THE 12 UTC GFS AND NAM AS WELL AS 00 UTC ECMWF REMAIN IN GOOD AGREEMENT THROUGH THE SHORT TERM. THE MAIN FORECAST CONCERN CONTINUES TO BE THREAT OF SEVERE THUNDERSTORMS THROUGH THE PERIOD. CURRENTLY...500 HPA RIDGE AXIS HAS PUSHES INTO EASTERN NORTH DAKOTA TODAY WITH A BROAD TROUGH CENTERED ALONG THE WEST COAST. THIS PLACES MAINLY WESTERN NORTH DAKOTA UNDER SOUTHWEST FLOW ALOFT. AT THE SURFACE...A SURFACE TROUGH SITS IN EASTERN MONTANA WITH A COLD FRONT FROM OPHEIM TO WEST OF MILES CITY TO SHERIDAN WYOMING. AHEAD OF THE COLD FRONT TEMPERATURES ARE IN THE MID TO UPPER 80S WITH DEW POINTS IN THE MID TO UPPER 60S ACROSS WESTERN NORTH DAKOTA. THE STRONGEST PRESSURE GRADIENT SITS EAST OF A LINE FROM MINOT TO BISMARCK WITH WINDS FROM 20 TO 30 MPH AND GUSTS AS HIGH AS 41 MPH AT JAMESTOWN. A VERY SLOW PROGRESSION IN THE UPPER LEVEL PATTERN OCCURS OVER THE NEXT SEVERAL DAYS AS THE RIDGE AND TROUGH SLOWLY MOVE EASTWARD. THE SOUTHWESTERLY FLOW ALOFT OVER THE NORTHERN PLAINS ALLOWS DISTURBANCES MOVING THROUGH THE TROUGH TO LIFT THROUGH THE PLAINS THROUGH FRIDAY NIGHT BEFORE THE ARRIVAL OF THE MAIN UPPER LEVEL LOW ON SATURDAY. THIS IS EXPECTED TO BRING SEVERAL ROUND OF SEVERE WEATHER THROUGH THE STATE TONIGHT THROUGH FRIDAY NIGHT WITH ANOTHER POSSIBLE ROUND OVER CENTRAL AND EASTERN PORTIONS OF NORTH DAKOTA ON SATURDAY. THE STORM PREDICTION CENTER CURRENTLY HAS MAINLY WESTERN AND NORTHERN NORTH DAKOTA IN SLIGHT RISK WEDNESDAY THROUGH FRIDAY. CONSIDERABLE CONVECTIVE INHIBITION IS HOLDING BACK CONVECTIVE DEVELOPMENT OVER WESTERN NORTH DAKOTA TODAY WITH MIXED LAYER CAPE VALUES AROUND 1500 J/KG AND SUFFICIENT 0 TO 6 KM BULK SHEAR FOR SEVERE THUNDERSTORMS. THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER CENTRAL AND EASTERN MONTANA AND SUSTAIN THEMSELVES INTO WESTERN NORTH DAKOTA THIS EVENING AND POTENTIALLY OVERNIGHT. INHIBITION SLOWLY DISSOLVES THROUGH THURSDAY WHILE INSTABILITY. A POTENTIAL MODERATELY UNSTABLE ATMOSPHERE ON LATE THURSDAY INCREASES THE RISK OF SEVERE WEATHER WITH OTHER POTENTIALLY MODERATELY UNSTABLE DAY ON FRIDAY. LOOK FOR BREEZY CONDITIONS TO CONTINUE THROUGH FRIDAY AS STRONG PRESSURE GRADIENT PERSISTS OVER CENTRAL NORTH DAKOTA. THE PRESSURE GRADIENT IN CONJUNCTION WITH AFTERNOON HEATING IS ALLOWING STRONG MID LEVEL WINDS TO MIX TO THE SURFACE. EXPECT ABOVE NORMAL TEMPERATURES TO CONTINUE THROUGH SATURDAY BEFORE THE COLD AIR BEHIND THE COLD FRONT MOVES INTO WESTERN NORTH DAKOTA. COOLER WEATHER AND WITH GENERALLY LOW LOW CHANCES FOR THUNDERSTORMS ON THE 4TH OF JULY...SUNDAY. LONG TERM...SUNDAY THROUGH THURSDAY... A BROAD SUBTROPICAL RIDGE OVER THE SOUTHEASTERN CONUS WILL ULTIMATELY ALLOW HEIGHT FALLS ASSOCIATED WITH LOW-AMPLITUDE TROUGHING OVER THE PACIFIC NORTHWEST TO OVERSPREAD MUCH OF THE NORTHERN PLAINS. A CORRESPONDING JET STREAM PATTERN WILL LIKELY CONTRIBUTE TO AN ACTIVE WEATHER PATTERN THROUGH THE FIRST HALF OF THE EXTENDED PERIOD. A STRONG MID LEVEL IMPULSE AND ATTENDANT SURFACE COLD FRONT SHIFTING EASTWARD ACROSS CENTRAL ND SHOULD BE THE FOCUS FOR ISOLATED TO WIDELY SCATTERED SHOWERS AND THUNDERSTORMS ACROSS PORTIONS OF CENTRAL AND EASTERN ND EARLY IN THE PERIOD. THE POTENTIAL FOR ADDITIONAL CONVECTION BEYOND SUNDAY AFTERNOON WILL BE DICTATED BY SEVERAL MID/UPPER LEVEL DISTURBANCES EMANATING FROM THE NORTHWESTERN US TROUGH...AND THE PREDICTABILITY OF ANY SPECIFIC CONVECTIVE EVENTS WILL REMAIN LOW THROUGH THE PERIOD. TEMPERATURES WILL LIKELY TREND COOLER THROUGH THE EARLY PART OF NEXT WEEK IN RESPONSE TO MID/UPPER LEVEL TROUGHING. PRECIPITATION CHANCES WILL BE REDUCED DRAMATICALLY BY THE MIDDLE OF NEXT WEEK AS THE ACTIVE BRANCH OF THE UPPER JET IS SHUNTED NORTHWARD AS A RESULT OF LARGE SCALE RIDGING OVER THE CENTRAL CONUS. AVIATION... VFR FLYING CONDITIONS WILL CONTINUE ACROSS MUCH OF WESTERN AND CENTRAL ND THROUGH THE REMAINDER OF THE AFTERNOON AND EVENING IN ADVANCE OF A WEAK SURFACE TROUGH SITUATED ALONG THE MT/ND BORDER. AN AREA OF LOW CLOUDS DEVELOPED OVER PORTIONS OF NORTH CENTRAL ND EARLIER THIS AFTERNOON...BRIEFLY RESULTING IN MVFR CIGS BELOW 3000 FEET AT KMOT. OCCASIONAL MVFR CONDITIONS WILL REMAIN POSSIBLE AT KMOT THROUGH 00 UTC THIS EVENING. STRONG WINDS AT KJMS ARE EXPECTED TO SLOWLY RELAX INTO THE EVENING HOURS. OTHERWISE...EXPECT THUNDERSTORMS TO DEVELOP OVER THE HIGHER TERRAIN OF EASTERN MT LATE THIS AFTERNOON...AND SPREAD NORTHEASTWARD INTO PORTIONS OF WESTERN AND CENTRAL ND THROUGH THE EVENING AND OVERNIGHT. OCCASIONAL MVFR CONDITIONS ARE POSSIBLE BENEATH ANY INDIVIDUAL THUNDERSTORM. ENVIRONMENTAL CONDITIONS WILL SUPPORT ISOLATED LARGE HAIL AND DAMAGING WINDS WITH THE STRONGEST STORMS...ESPECIALLY ACROSS WESTERN ND. && .BIS WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...DC/WAA LONG TERM/AVIATION...CLH/NH UPDATES...SCHECK
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BISMARCK ND 841 PM CDT WED JUN 30 2010 NDZ001>005-009>013-019>023-025-034>037-042-045>048-050-051-020145- DIVIDE-BURKE-RENVILLE-BOTTINEAU-ROLETTE-WILLIAMS-MOUNTRAIL-WARD- MCHENRY-PIERCE-MERCER-OLIVER-MCLEAN-SHERIDAN-WELLS-FOSTER-MORTON- BURLEIGH-KIDDER-STUTSMAN-GRANT-SIOUX-EMMONS-LOGAN-LA MOURE- MCINTOSH-DICKEY- 841 PM CDT WED JUN 30 2010 /741 PM MDT WED JUN 30 2010/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL NORTH DAKOTA...NORTHWEST NORTH DAKOTA...SOUTH CENTRAL NORTH DAKOTA AND SOUTHEAST NORTH DAKOTA. .DAY ONE...TONIGHT THERE IS A CHANCE OF THUNDERSTORMS ACROSS CENTRAL AND NORTHWEST NORTH DAKOTA TONIGHT...A FEW OF WHICH MAY BE STRONG. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY WARM AND HUMID CONDITIONS ARE FORECAST THROUGH FRIDAY WITH HIGH TEMPERATURES IN UPPER 80S TO MID 90S. WHEN COMBINING THE TEMPERATURE WITH THE HUMIDITY...THE HEAT INDEX WILL APPROACH 95 TO 100 ACROSS CENTRAL AND PORTIONS OF WESTERN NORTH DAKOTA THURSDAY AND FRIDAY. THUNDERSTORMS ARE ALSO POSSIBLE THURSDAY THROUGH SUNDAY...SOME OF WHICH MAY BE SEVERE THURSDAY AND FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THURSDAY AND FRIDAY. NDZ017-018-031>033-040-041-043-044-020145- MCKENZIE-DUNN-GOLDEN VALLEY-BILLINGS-STARK-SLOPE-HETTINGER-BOWMAN- ADAMS- 841 PM CDT WED JUN 30 2010 /741 PM MDT WED JUN 30 2010/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST NORTH DAKOTA AND SOUTHWEST NORTH DAKOTA. .DAY ONE...TONIGHT A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 2 AM CDT...1 AM MDT. LARGE HAIL AND DAMAGING WINDS WILL BE THE PRIMARY THREATS WITH SEVERE THUNDERSTORMS WEDNESDAY NIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY WARM AND HUMID CONDITIONS ARE FORECAST THROUGH FRIDAY WITH HIGH TEMPERATURES IN UPPER 80S TO MID 90S. WHEN COMBINING THE TEMPERATURE WITH THE HUMIDITY...THE HEAT INDEX WILL APPROACH 95 TO 100 ACROSS WESTERN NORTH DAKOTA THURSDAY AND FRIDAY. THUNDERSTORMS ARE ALSO POSSIBLE THURSDAY THROUGH SUNDAY...SOME OF WHICH MAY BE SEVERE THURSDAY AND FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTERS SHOULD REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN BISMARCK. AYD
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 911 PM CDT WED JUN 30 2010 NDZ040-043-010315- BOWMAN-SLOPE- 811 PM MDT WED JUN 30 2010 ...SPECIAL WEATHER STATEMENT... AT 806 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 25 MILES SOUTHWEST OF BOWMAN...MOVING NORTHEAST AT 40 MPH. PENNY SIZE HAIL...WINDS UP TO 50 MPH...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... SUNSET BUTTE... MARMARTH... GRIFFIN... RHAME... BOWMAN... PRETTY BUTTE... BUFFALO SPRINGS... SCRANTON... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. SIMOSKO
The Rapid City radar (KUDX), 223 km away, was scanning. The volume nearest the first event began at 02:28 UTC.
10 thunderstorm wind. Local standard time, as filed.
No reports of damage from the strong winds was reported.
This report was relayed by the Bowman County Emergency Manager.
A large mature tree was blown down by the strong thunderstorm winds.
This report was relayed by the Bowman County Emergency Manager.
This report was relayed by the Bowman County Emergency Manager.
No reports of damage accompanied the strong thunderstorm winds.
The strong thunderstorm winds blew down multiple cottonwood and evergreen trees. Some of the trees were 18 inches in diameter. Power lines were also reported down.
Trees and power lines were reported down from the intense thunderstorm winds. In addition, a roof was partially torn off of the Buckskin Bar and Grill and an exterior sign was blown off of another building in Killdeer. Damage was also sustained to other buildings, along with two lightning related fires.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Dakota in 2010Every state in 2010This day in weather historyWarnings in North Dakota, June 2010
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: 241971, 241972, 241973, 241974, 241975, 241976, 241977, 241980, 241981, 241986.