Severe thunderstorms including several low top supercells produced large hail, damaging wind, and one tornado in northwest MN.
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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.
Severe thunderstorms including several low top supercells produced large hail, damaging wind, and one tornado in northwest MN.
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 23, 6:24 AM CST, 1 hour 38 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Grand Forks ND 724 AM CDT Tue Jun 23 2026 .KEY MESSAGES... - There is a level 1 out of 5 risk for severe thunderstorms this afternoon into early evening. The main hazards will be hail up to the size of ping pong balls, gusty winds to 60 mph, and perhaps a few brief, weak tornadoes. - Growing signal for potentially strong to severe storms late this weekend into early next week. && .DISCUSSION... Issued at 222 PM CDT Mon Jun 22 2026 ...Synopsis... Upper trough resides in southern SK/AB, with one or more embedded mid level impulses over MT and western Dakotas can be seen on water vapor imagery this afternoon. This will slowly migrate eastward bringing numerous showers and scattered storms into eastern Dakotas and Minnesota tonight and Tuesday. There is high confidence in at least a wetting rain of quarter inch of rainfall for most locations, some areas could receive up to 1 inch of rainfall (still relatively favored to occur in northeast ND) by end of Tuesday. Most locations will receive this rainfall overnight tonight and Tuesday morning. Main hazard with storms overnight to Tuesday morning will be lightning, with expectation of storms to remain sub-severe. There is, however, potential for isolated strong to severe storms Tuesday afternoon. More details on this can be found below. The upper trough continues to slide slowly east late Tuesday and Wednesday, with Wednesday still holding chance for scattered showers and weak storms along with continued below average (yet mild) temperatures. Ensemble guidance continues to agree in upper ridging to build into the central CONUS and southern CAN late in the work week, promoting a return toward average temperatures. Upper ridging also promotes mostly dry conditions Thursday. There is a medium chance in showers and storms Friday with some moisture and forcing attempting to push into our area from the southwest, although confidence is not high in this occurrence. Ensemble's agreement in the upper ridging into the central CONUS is accompanied by equally agreed upon upper troughing in the Northwest and southern BC. Ensembles also agree in migrating this upper trough eastward into the southern Canadian Prairie Provinces. This will promote increasing moisture, instability, and forcing into the Northern Plains and Upper Midwest, bringing a chance for bouts of showers and thunderstorms. This includes the potential for severe storms this weekend into next week. More details on this severe potential found below. ...Severe storm potential Tuesday afternoon into early evening... There is a risk for isolated to perhaps scattered severe storms Tuesday afternoon into early evening. Main hazards are hail to the size of ping pong balls, gusty winds, and perhaps a few brief, weak tornadoes. While there were previous uncertainty regarding degree of destabilization Tuesday afternoon to help fuel thunderstorms, most high resolution guidance strongly supports sufficient instability to be present for thunderstorms to harness - generally 500-1500 J/kg of MLCAPE. While moisture will be relatively meager, the combination of dew points in the upper 50s to low 60s beneath seasonably cold temperatures aloft (-15C at 500 mb) as well as steep low level lapse rates amid day time heating (7-9 C/km in the lowest 1 km AGL) should prove sufficient mixture to fuel thunderstorms. This is amid sufficient shear to help organize thunderstorms - generally 25-40 kt of shear. While the lowest levels of the cloud baring column is composed of generally light winds, winds increase markedly in the mid to upper portions. Additionally, wind shear is oriented unidirectionally west to east promoting splitting storms and subsequent supercellular characteristics (albeit low topped supercells). This shear is also generally perpendicular to a north to south surface front progged to be within the Red River Valley into west-central MN. This should promote generally discrete storm mode when considering degree of forcing as well. Given potential for discrete low topped supercells amid meager moisture, hail is at the forefront of hazards - potentially to the size of ping pong balls. While not likely to be widespread, there is relatively low but present threat for gusty winds touching 60 mph. There is also potential for brief, weak tornadoes. This type of set up is similar to last Friday's tornadic environment in Minnesota that resulted in funnel clouds and at least one weak tornado. Should storms anchor themselves on a surface front within the Red River Valley into west-central MN, strong low level shear and ambient vertical vorticity along the front could provide enough spin and stretching to produce brief, weak tornadoes. This is backed by AI guidance like Nadocast and Storm net showing low but present tornado probabilities in the aforementioned areas. With the loss of daytime heating, severity of storms should decrease around sunset (between 7-10 PM). ...Weekend into early next week severe potential... The chance for synoptic ingredients typical for producing severe storms in our region continues to increase this weekend into early next week. However, more refined and important details that would dictate coverage and severity of storms remains uncertain due to this period toward the end of the predictability horizon. Synoptic ingredients include a preceding period for moisture and instability returning into our area ahead of a synoptic upper trough and attendant mid level jet max ejecting into the Northern Plains and Upper Midwest. Several AI guidance also reveal this signal of severe potential as well. This includes some more robust signals on Sunday and Monday that keep widespread and/or significant severe potential on the table. Backing these signals is the speed at which the upper jet max traverses through our region, the orientation of this jet into the geometry of the warm sector (although this aspect is still somewhat in question), as well as the degree of instability (possibly very unstable air mass). In general our local window of potential severe storms with this period starts as early as late Saturday/early Sunday, and potentially extending through Monday/Tuesday. && .AVIATION /12Z TAFS THROUGH 12Z WEDNESDAY/... Issued at 722 AM CDT Tue Jun 23 2026 Tricky aviation forecast today. Band of showers and a few thunderstorms bringing brief 1-3 hour period of potential IFR conditions in vsby and MVFR in ceiling in the RRV moving into NW MN thru the morning/midday. Then looking at potential clearing into parts of E ND, southern half of the valley, this afternoon with then scattered storm development mid to late afternoon and evening thru E ND into MN. Winds southeast then turning southwest and then west as a surface trough moves thru this afternoon into this evening. && .FGF WATCHES/WARNINGS/ADVISORIES... ND...None. MN...None. && DISCUSSION...CJ AVIATION...Riddle
Hazardous Weather Outlook National Weather Service Grand Forks ND 604 AM CDT Tue Jun 23 2026 MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-241115- 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-Eddy-Nelson-Grand Forks- Griggs-Steele-Traill-Barnes-Cass-Ransom-Sargent-Richland- Western Walsh- 604 AM CDT Tue Jun 23 2026 This hazardous weather outlook is for portions of eastern North Dakota, west central and northwest Minnesota. .DAY ONE...Today and Tonight There is a level 1 out of 5 risk for severe thunderstorms this afternoon and evening. Hail up to the size of ping pong balls and gusty winds to 60 mph will be the main hazards with a low chance for brief/weak tornadoes. .DAYS TWO THROUGH SEVEN...Wednesday through Monday There is a medium chance for strong thunderstorms late Saturday and Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation may be required today.
The Fargo/Grand Forks radar (KMVX), 149 km away, was scanning. The volume nearest the first event began at 14:02 UTC.
4 hail, 1 thunderstorm wind, 1 tornado. Local standard time, as filed.
Many trees blown down, and a fence damaged. Some shingles off roof and holes in the siding. The neighboring corn field is stripped and complete loss.
Lots of smaller hail with some stones larger than quarters estimated to the size of half dollars.
Quarter size hail reported by public and relayed by media.
As a supercell tracked over rural Clearwater County south of Bagley after several attempts and funnel cloud reports earlier in the lifecycle of the storm a brief ground circulation was noted to the northwest of Upper Rice Lake. No damage was noted from the storm chaser that reported the brief tornado with video evidence only showing intermittent visible ground contact.
Photo sent of hail stones with the largest stones the size of quarters.
A video and picture of hail on the east edge of Itasca State Park.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Minnesota in 2026Every state in 2026This day in weather historyThe tornado archive for Minnesota, 2026Warnings in Minnesota, June 2026
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: 1347948, 1347941, 1347942, 1347950, 1347943, 1347945.