During the mid to late evening of June 24th, thunderstorms over central and northeast Montana consolidated into a line and tracked into northwest North Dakota. These storms eventually tracked into southwest Manitoba around midnight CST.
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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 FGF wrote it up.
During the mid to late evening of June 24th, thunderstorms over central and northeast Montana consolidated into a line and tracked into northwest North Dakota. These storms eventually tracked into southwest Manitoba around midnight CST. However, not long after this, several severe thunderstorms built southward into northwest Minnesota and dropped large hail.
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 Grand Forks, ND wrote its last area forecast discussion before the first event at Jun 24, 10:43 PM CST, 2 hours 22 minutes earlier.
Area Forecast Discussion National Weather Service Grand Forks ND 1143 PM CDT FRI JUN 24 2016 .UPDATE... Issued at 1143 PM CDT Fri Jun 24 2016 There is a severe thunderstorm watch for portions of northeast ND until 5 am. However the storms out west of Minot are moving quite fast and should be into areas west of Devils Lake not long after midnight. Still uncertain how much of the area will be affected, but strong winds and hail are the main threats. Quite a bit of the high resolution guidance is showing the activity west of Minot lifting NE into southern Manitoba. However will have to watch and see. && .SHORT TERM...(This evening through Saturday) Issued at 305 PM CDT Fri Jun 24 2016 Main forecast challenges will be convective/severe potential tonight and again Saturday afternoon. Main model differences revolve around when cap will break allowing convective initiation from anytime from mid/late afternoon to late evening depending on model solution. Waiting game ahead. For tonight global GFS/ECMWF models continue with convective initiation farther south and earlier across the fa in warm advection zone. These models even develop convection well within high CIN area as far south as FAR. NSSL and HRRRX cams on the other hand hold off on initiation with strong cap and develop convection mid to late evening on fringe of cap across the far north or even into southern Canada. Even farther south GFS showing high CIN values with convective temperatures in the mid 90s. Upper support lags with upper low still way back west in Montana. So at this time am leaning toward later/farther north cam solutions which make more sense. Will see in the next few hours. With potential convection heavy rain concerns for far northern valley into adjacent areas of NE ND and NW MN. These areas already saturated and additional heavy rains will cause issues. At this point there is enough uncertainty to hold off on any flood watch headlines however this could change quickly if global models verify and will need to monitor closely. Late tonight could see another round of convection propagating in from the west however low level jet not all that impressive so not sure how this convection will hold together. Mixing and warm column will result in warm and somewhat muggy night. Will likely see some degree of convection Saturday morning with general consensus over NW MN. Severe threat Saturday afternoon will hinge on location of cold front. Still appears to be 2-4 hour window east of the valley for some severe potential. If so expect convection to be east of the fa by 00z. Base on timing of FROPA warmest temperatures will be along and east of the valley with cooler readings to the west. .LONG TERM...(Saturday night through Friday) Issued at 305 PM CDT Fri Jun 24 2016 Models in good agreement with low pressure system occluding along the Manitoba Ontario border with PCPN wrap-around showers limited to areas along the international border Saturday night. During the day Sunday showers are expected to develop farther south...mainly along and to the north of HWY 2...as low convective temps are reached under cool air aloft. Thereafter PCPN chances through the week will be limited as NW flow aloft keeps instability and or deep moisture to the south and west. Slight chances for some convective activity return in the afternoon Wednesday to Friday with confidence and coverage limited. Temperatures will be seasonal with highs in the mid to upper 70s with a few 80s possible toward the end of the week. && .AVIATION...(For the 06Z TAFS through 06Z Saturday night) Issued at 1143 PM CDT Fri Jun 24 2016 Not much change to the previous set of TAFs. Looking like best chances for any thunder after midnight will be at KDVL. As the frontal boundary works across the area this afternoon there could be more thunder chances at KBJI. Otherwise expect to see gusty west winds behind the front for the afternoon into early evening. && .FGF Watches/Warnings/Advisories... ND...None. MN...None. && UPDATE...Godon SHORT TERM...Voelker LONG TERM...JK AVIATION...Godon
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND FORKS ND 555 AM CDT FRI JUN 24 2016 MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-251100- WEST POLK-NORMAN-CLAY-KITTSON-ROSEAU-LAKE OF THE WOODS- WEST MARSHALL-EAST MARSHALL-NORTH BELTRAMI-PENNINGTON-RED LAKE- EAST POLK-NORTH CLEARWATER-SOUTH BELTRAMI-MAHNOMEN- SOUTH CLEARWATER-HUBBARD-WEST BECKER-EAST BECKER-WILKIN- WEST OTTER TAIL-EAST OTTER TAIL-WADENA-GRANT-TOWNER-CAVALIER- PEMBINA-BENSON-RAMSEY-EASTERN WALSH COUNTY-EDDY-NELSON- GRAND FORKS-GRIGGS-STEELE-TRAILL-BARNES-CASS-RANSOM-SARGENT- RICHLAND-WESTERN WALSH COUNTY- 555 AM CDT FRI JUN 24 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN NORTH DAKOTA...WEST CENTRAL AND NORTHWEST MINNESOTA. .DAY ONE...TODAY AND TONIGHT SHOWERS AND A FEW THUNDERSTORMS WILL MOVE THROUGH SOUTHEASTERN NORTH DAKOTA AND WEST CENTRAL MINNESOTA THIS MORNING. THESE MORNING STORMS ARE NOT EXPECTED TO BE SEVERE, BUT BRIEF DOWNPOURS AND LIGHTNING WILL BE A THREAT. MORE THUNDERSTORMS ARE EXPECTED TO DEVELOP LATER ON THIS AFTERNOON AND INTO TONIGHT ACROSS THE REGION AS A WARM FRONT LIFTS NORTH TOWARDS THE CANADIAN BORDER. THE STORMS WILL BE FAIRLY ISOLATED AT FIRST, BUT WILL QUICKLY BECOME STRONG TO SEVERE WITH LARGE HAIL AND DAMAGING WINDS. AN ISOLATED TORNADO IS POSSIBLE NEAR THE INTERNATIONAL BORDER. THE GREATEST THREAT FOR SEVERE WEATHER WILL BE ALONG AND NORTH OF THE HIGHWAY 2 CORRIDOR. MORE WIDESPREAD SHOWERS AND THUNDERSTORMS WILL MOVE IN LATER IN THE OVERNIGHT HOURS. DEPENDING ON THE EXACT TRACK OF THE STORMS TONIGHT, PORTIONS OF NORTHEASTERN NORTH DAKOTA AND NORTHWESTERN MINNESOTA COULD SEE HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SEVERE STORMS WILL AGAIN BE POSSIBLE SATURDAY, MAINLY EAST OF THE RED RIVER IN WESTERN MINNESOTA. STORMS WILL DEVELOP ALONG A COLD FRONT, ISOLATED AT FIRST BUT THEN FORMING A CLUSTER OR LINE AS THEY MOVE EASTWARD THROUGH LAKES COUNTRY, WITH LARGE HAIL AND DAMAGING WINDS THE PRIMARY THREAT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED. JR
The Fargo/Grand Forks radar (KMVX), 154 km away, was scanning. The volume nearest the first event began at 07:05 UTC.
4 hail. Local standard time, as filed.
Brief heavy rain and occasional dime to quarter sized hail fell across far northern Rollis and southeastern Moose River townships.
Heavy rain and hail fell along the Upper Red Lake shoreline. Some stones were a bit larger than a quarter.
Large hail and very heavy rain fell along the southeast shore of the Upper Red Lake.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Minnesota in 2016Every state in 2016This day in weather historyWarnings in Minnesota, June 2016
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: 632522, 632523, 632524, 632525.