Thunderstorms developed across parts of eastern ND and one severe thunderstorm produced quarter size hail in Cass County, ND.
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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.
Thunderstorms developed across parts of eastern ND and one severe thunderstorm produced quarter size hail in Cass County, ND.
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 19, 5:30 AM CST, 7 hours 17 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Grand Forks ND 630 AM CDT Fri Jun 19 2026 .KEY MESSAGES... - After a few showers and thunderstorms on Friday, temperatures will slowly warm to near 80 by late next week. && .UPDATE... Issued at 630 AM CDT Fri Jun 19 2026 Showers continue to move from west to east this morning, with temperatures in the mid to upper 50s and light winds. Additional showers and thunderstorms are expected this afternoon, with a few strong to severe storms possible. Support for severe thunderstorms is greatest in west central Minnesota, where the strongest storms could bring hazards to include 1 inch hail and wind gusts to 60 mph. A few strong storms are possible in other areas as well, with small hail and wind gusts to 50 mph possible. && .DISCUSSION... Issued at 202 PM CDT Thu Jun 18 2026 ...Synopsis... Northwest flow remains in place over the Northern High Plains and Upper Midwest this afternoon. Embedded in northwesterly flow will be a handful of weak waves. The most prominent shortwave propagates through Friday. As it tracks through, a few showers and thunderstorms are forecasted to develop. Several more weak waves will traverse the region late this weekend into early next week as northwest to zonal flow continues. This will bring additional low chances for showers and thunderstorms to start the work week. Temperatures will remain cooler then average throughout much of the forecast period, although by mid to late next week the pattern does shift as ridging builds in. This will finally help us get temperatures back to near average by Thursday. While there are some differences from ensemble member to ensemble member of the ridges strength, there is surprisingly little spread in temperatures from the NBM. For example, at KGFK, the 25th and 75 percentiles for next Thursday are 75 and 80 degrees. Average for the date is 78 degrees. So, while warmer then the current cool spell we are experiencing, even ridging will only bring temperatures up to near average. ...Showers and Thunderstorms Friday... A wave propagating southeastward from Saskatchewan Thursday night quickly into Minnesota by Friday afternoon will be the trigger for shower and thunderstorm development beginning tonight. As the low swings through the FA late Friday morning into the afternoon, an airmass characterized by up to 1000 J/Kg of MUCAPE and 20 to 30 knots of effective shear will allow for showers and thunderstorms to blossom. The speed at which the low tracks through the FA will determine where the strongest thunderstorms initiate. A quicker low will whisk much of the instability eastward by afternoon, leaving all but our far southeastern counties with any chance for a stronger storm. A slower system would allow instability to remain over more of the region, and storms to develop further west, probably closer to the MN side of the Red River Valley. The best overlap in shear and instability in either scenario is in west central MN (Park Rapids, Detroit Lakes, Wadena, Fergus Falls areas). If a thunderstorm were to become strong to marginally severe, it would be in this region during the mid to late afternoon hours, with just sufficient speed shear for hail to be the primary threat. Therefore, the Storm Prediction Center has placed our far southeastern counties in a marginal, level 1 out of 5 risk for severe thunderstorms Friday afternoon. && .AVIATION /12Z TAFS THROUGH 12Z SATURDAY/... Issued at 630 AM CDT Fri Jun 19 2026 MVFR to VFR conditions prevail this morning across the area. Scattered showers are bringing MVFR conditions to KFAR and KDVL; however, this could extend to other sites briefly during periodic shower activity through late this morning. Additional showers and thunderstorms are expected this afternoon. Most shower and thunderstorm activity will move to the east of the area by late this evening. Winds will remain out of the west to northwest through this evening before becoming tapering off during the late evening and overnight. && .FGF WATCHES/WARNINGS/ADVISORIES... ND...None. MN...None. && UPDATE...Lynch DISCUSSION...Rafferty AVIATION...Lynch
Hazardous Weather Outlook National Weather Service Grand Forks ND 338 AM CDT Fri Jun 19 2026 MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-200845- 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- 338 AM CDT Fri Jun 19 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 in west-central Minnesota. The main hazards will be hail up to quarter size and brief gusty winds. Scattered thunderstorms across the region tomorrow afternoon will bring lightning impacts for all outdoor activities. .DAYS TWO THROUGH SEVEN...Saturday through Thursday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation may be required today.
The Fargo/Grand Forks radar (KMVX), 92 km away, was scanning. The volume nearest the first event began at 18:45 UTC.
1 hail. Local standard time, as filed.
Hail was mainly pea to nickel sized. A few hail stones as large as a quarter. Hail lasted five minutes.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Dakota in 2026Every state in 2026This day in weather historyWarnings in North Dakota, 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: 1347938.