In the late evening of Saturday June 16th, Severe Thunderstorm Watch 403 was issued in anticipation of severe thunderstorms developing during the late evening of the 16th and early morning hours of the 17th in association with a developing nocturnal LLJ (low level jet). Numerous severe thunderstorm warnings and three tornado warnings were issued.
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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.
In the late evening of Saturday June 16th, Severe Thunderstorm Watch 403 was issued in anticipation of severe thunderstorms developing during the late evening of the 16th and early morning hours of the 17th in association with a developing nocturnal LLJ (low level jet). Numerous severe thunderstorm warnings and three tornado warnings were issued. Reports included large hail, tornadoes, and a flash flood.
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 16, 1:49 PM CST, 8 hours 26 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BISMARCK ND 249 PM CDT SAT JUN 16 2007 .SHORT TERM...TONIGHT THROUGH TUESDAY NIGHT... ACTIVE NIGHT ON TAP AS A WARM FRONT LIFTS NORTHWARD OUT OF SOUTH DAKOTA INTO OUR STATE. UNSTABLE BUT CAPPED AIR SOUTH OF THE FRONT WILL LIFT OVER THE FRONT ON THE WINGS OF A NOCTURNAL LOW LEVEL JET...THIS WILL BE THE MAIN MECHANISM FOR OUR FORECAST AREA...THUS I EXPECT MOST OF OUR THUNDERSTORMS WILL OCCUR BETWEEN 10 PM AND 10 AM SUNDAY MORNING. OTHER ACTIVITY...INITIATED OFF THE HIGHER TERRAIN OF MONTANA AND WYOMING MIGHT AFFECT OUR SOUTHWEST CORNER BY LATE AFTERNOON. A SECOND ROUND OF SEVERE WEATHER WILL DEVELOP OVER THE CENTRAL PART OF THE STATE SUNDAY AFTERNOON AS THE SURFACE LOW AND COLD FRONT PUSH THROUGH THE REGION. AFTER THAT SHOWERS AND THUNDERSHOWERS MAY LINGER IN A REGIME OF COLD UPPER LEVEL TEMPERATURES MONDAY AND TUESDAY. .LONG TERM...WEDNESDAY THROUGH SATURDAY... AS THE NIGHT SHIFT INDICATED IN THE PREVIOUS DISCUSSION...THE LAST FEW GFS AND EUROPEAN RUNS HAVE BECOME AS ONE...WITH A MUCH HIGHER DEGREE OF AGREEABILITY OVER THE EXTENDED PERIOD THAN WHAT WAS DEPICTED OVER THE PAST FEW DAYS. EXITING SHORT WAVE WEDNESDAY WILL BE REPLACED WITH NORTHWEST FLOW ALOFT OVER THE NORTHERN PLAINS AS UPPER LEVEL RIDGING TAKES PLACE OVER THE ROCKY MOUNTAIN REGION. THE UPPER LEVEL RIDGE THEN SLIDES SLOWLY EAST TOWARDS THE GREAT PLAINS THURSDAY THROUGH SATURDAY...AND WILL BRING GRADUALLY WARMER TEMPERATURES INTO THE REGION AS WE APPROACH THE WEEKEND. TOUGH CALL ON PRECIPITATION CHANCES ALL FOUR DAYS OF THE LONG TERM. RIDGE RIDER SHORT WAVES WILL BE DIFFICULT TO TIME AND PLACE...SO FELT THE BEST FORECAST WAS TO LEAVE POPS/WEATHER AS IS...LEAVING SLIGHT CHANCE POPS ALONE AS WELL AS LEAVING WEATHER OUT WHERE WE HAD DRY BEFORE. && .AVIATION... A WARM FRONT LIFTING NORTH AND AN UPPER LEVEL DISTURBANCE MOVING IN FROM MONTANA WILL BE THE FOCUS FOR THUNDERSTORMS DEVELOPING THIS EVENING WEST...ADVECTING INTO CENTRAL NORTH DAKOTA AROUND MIDNIGHT. SOME OF THESE STORMS WILL BE SEVERE. VFR CIGS AND VIS EXPECTED FOR REST OF TODAY AND THROUGH THE EARLY EVENING...WITH MVFR TO IFR CIGS AND VIS ANTICIPATED IN HEAVIER THUNDERSTORMS TONIGHT. MODELS THEN BRING IN A LARGE AREA OF LOW CIGS...AROUND 1500-2000 FT AGL...BEHIND THE CONVECTION WEST AND CENTRAL LATE TONIGHT/EARLY TOMORROW MORNING...SO HAVE TRENDED THE TAF FORECASTS IN THIS DIRECTION. MAY YET SEE AN AFTERNOON THUNDERSTORM OVER THE FAR SOUTHWEST AND SOUTH CENTRAL TODAY WITH OUTFLOW BOUNDARIES FROM THE STORMS IN SD PUSHING NORTH...AND CONVECTION OVER THE BIG HORNS OF MONTANA ADVECTING EAST-NORTHEAST. && .BIS WATCHES/WARNINGS/ADVISORIES... NONE. && RSL/NH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BISMARCK ND 517 AM CDT SAT JUN 16 2007 NDZ001>005-009>013-017>023-025-171030- DIVIDE-BURKE-RENVILLE-BOTTINEAU-ROLETTE-WILLIAMS-MOUNTRAIL-WARD- MCHENRY-PIERCE-MCKENZIE-DUNN-MERCER-OLIVER-MCLEAN-SHERIDAN-WELLS- FOSTER- 517 AM CDT SAT JUN 16 2007 /417 AM MDT SAT JUN 16 2007/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL NORTH DAKOTA...NORTHWEST NORTH DAKOTA...SOUTH CENTRAL NORTH DAKOTA...SOUTHEAST NORTH DAKOTA AND SOUTHWEST NORTH DAKOTA. .DAY ONE...TODAY AND TONIGHT THERE IS A CHANCE OF THUNDERSTORMS THIS AFTERNOON AND TONIGHT. SOME MAY BE SEVERE. HEAVY RAIN IS POSSIBLE...MAINLY AFTER MIDNIGHT. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY ON SUNDAY THERE IS ANOTHER CHANCE OF THUNDERSTORMS...POSSIBLY SEVERE. AN ACTIVE WEEK AHEAD WITH A CHANCE OF THUNDERSTORMS EACH DAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT. NDZ031>037-040>048-050-051-171030- GOLDEN VALLEY-BILLINGS-STARK-MORTON-BURLEIGH-KIDDER-STUTSMAN- SLOPE-HETTINGER-GRANT-BOWMAN-ADAMS-SIOUX-EMMONS-LOGAN-LA MOURE- MCINTOSH-DICKEY- 517 AM CDT SAT JUN 16 2007 /417 AM MDT SAT JUN 16 2007/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL NORTH DAKOTA...SOUTHEAST NORTH DAKOTA AND SOUTHWEST NORTH DAKOTA. .DAY ONE...TODAY AND TONIGHT THERE IS A CHANCE OF THUNDERSTORMS THIS AFTERNOON AND TONIGHT...SOME POSSIBLY SEVERE. A RIVER FLOOD WARNING IS IN EFFECT FOR THE JAMES RIVER NEAR LUDDEN DAM. SEE THE LATEST FLOOD STATEMENT FOR DETAILS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY ON SUNDAY THERE IS ANOTHER CHANCE OF THUNDERSTORMS...POSSIBLY SEVERE. AN ACTIVE WEEK AHEAD WITH A CHANCE OF THUNDERSTORMS EACH DAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT. JV
The Bismarck radar (KBIS), 16 km away, was scanning. The volume nearest the first event began at 04:15 UTC.
4 hail, 2 tornado, 1 flash flood. Local standard time, as filed.
Hail continued off and on for 25 minutes, mostly pea size with stones as large as nickels from time to time.
No damage reported at the time or from follow up calls to emergency management.
No damage reported in real time or in follow up calls to emergency management.
The hail cracked some windows.
Extensive lowland flooding due to 4.50 inches of rain from thunderstorms. Water over some roads but damage was minor.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Dakota in 2007Every state in 2007This day in weather historyThe tornado archive for North Dakota, 2007Warnings in North Dakota, June 2007
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: 38778, 38779, 38780, 38782, 38783, 38781, 45274.