Thunderstorms caused wind damage in northwestern Minnesota.
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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 caused wind damage in northwestern Minnesota.
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 6, 1:37 PM CST, 1 hour 53 minutes earlier.
Area Forecast Discussion National Weather Service Grand Forks ND 237 PM CDT Tue Jun 6 2023 .SHORT TERM...(This evening through Wednesday night) Issued at 237 PM CDT Tue Jun 6 2023 Key Messages: -Scattered thunderstorms are expected this afternoon into the early evening, with a few isolated strong to severe storms possible. -Yet another round of scattered thunderstorms will be possible Wednesday afternoon and evening, with a few isolated strong to severe storms expected. -Temperatures remain warm today, with a slight cool down anticipated on Wednesday, especially east of the Red River Valley. Discussion... The overall pattern across the short term remains relatively stagnant as upper level ridging persists. At the surface, a weak boundary, generally defined by slightly lower dewpoint temperatures to the east, was draped over the Red River Valley. This boundary will provide some semblance of forcing for thunderstorm development this afternoon. There is already some agitated Cu development across the northern valley as well, with radar returns over Cavalier county at this time. As the afternoon wears on, expecting Cu to become more widespread as convective temperatures are met across the region. Instability of 1000-1500 J/kg is being analyzed from the Red River Valley westward. This, along with low level lapse rates approaching 9 C/km should allow for rapid thunderstorm development. As with previous days, an overall lack of appreciable shear will limit the degree of strong to severe potential though. As a result, only anticipating a few isolated stronger storms, if any are able to tap into the storm modified environments. Otherwise, another warm day of afternoon high temperatures in the 80s to low 90s is expected today. Moving into Wednesday, there may be some lingering early morning showers or storms across the southern CWA, but confidence in anything sustaining itself after sundown tonight is currently low. Rather, the anticipation is for another day of warm temperatures from the Red River Valley westward, with cooler temperatures on the eastern side of the stationary boundary. With the pooling of moisture to the west of the boundary, the instability axis looks to shift slightly westward. Still, there is an expectation for instability values in the 1000-1500 J/kg range by the afternoon hours from the Red River Valley westward. With slightly better shear (20-25 kts) expected as the ridge axis begins to progress westward, there will be some potential for a few isolated, but organized updrafts. Any stronger thunderstorms that are able to develop will be capable of wind gusts to 60 mph and hail up to 1 inch in diameter. .LONG TERM...(Thursday through Tuesday) Issued at 237 PM CDT Tue Jun 6 2023 Key Messages: -Isolated to scattered thunderstorm chances persist through the end of the week. -Temperatures will be on a gradual cooling trend moving into the weekend. -Quieter weather is anticipated from the weekend into early next week. Discussion... A shift in the upper level pattern is expected across the late week period. Ridging aloft looks to become squeezed westward as troughing over the eastern CONUS and Great Lakes strengthens. This will result in a transition to north-northwesterly flow aloft over the northern Plains into the weekend. Cluster analysis is in generally in good agreement on this flow pattern, with ridging aloft returning to the region moving toward mid next week. With the introduction of north-northwesterly flow to the region, there will be increasing chances for a shortwave or two to travel through the flow pattern and into the forecast area. Thursday looks to see the first of the potential shortwave impacts. At the surface, an attendant cold front will also be present. The cold front, in conjunction with the weak shortwave will likely spark another round of thunderstorm activity Thursday afternoon and evening. Instability on the order of 1000-2000 J/kg will couple with modest shear (20-25 kts) to produce at least some potential for isolated organized strong to severe thunderstorm development. The chance for severe thunderstorm potential remains low still at this time though (<5% chance). Regardless, the general expectation is for more widespread coverage of shower and thunderstorm activity as the front passes through given the increased forcing and moderate instability. Friday may still see some lingering showers and storms in the morning across the southern forecast area as the front continues to progress. There are hints within ensemble guidance that another weak shortwave may travel through the flow pattern later in the day Friday as well, which could spark another round of shower and thunderstorm development. With the prior frontal passage though, moisture and resultant precipitation potential may be limited. Otherwise, with northwesterly flow aloft firmly moving in place over the northern Plains from Friday into the weekend, a cooler and drier trend is expected. High temperatures look to fall back to near normal values, generally in the 70s to low 80s. Moving toward early to mid next week, however, cluster analysis indicates that the ridging aloft will gradually begin to work back eastward. This will lead to a short lived cool down, with temperatures warming back up above normal by Tuesday. && .AVIATION...(For the 18Z TAFS through 18Z Wednesday afternoon) Issued at 1253 PM CDT Tue Jun 6 2023 Generally VFR conditions are anticipated at all TAF sites through the remainder of the day and into Wednesday. There will be increasing chances for scattered thunderstorm development throughout the afternoon, but predictability of coverage remains low at this time. Given the low confidence, left VCTS mention out of the TAFs for now, but did include lowering cigs in anticipation of increasing Cu coverage through the afternoon. Will continue to monitor trends and amend as needed when thunderstorm coverage becomes more certain. Otherwise, winds will remain generally light throughout the day, becoming more sustained overnight as low pressure deepens off to the east. && .FGF WATCHES/WARNINGS/ADVISORIES... ND...None. MN...None. && SHORT TERM...Rick LONG TERM...Rick AVIATION...Rick
Hazardous Weather Outlook National Weather Service Grand Forks ND 250 PM CDT Tue Jun 6 2023 MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-072000- 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- 250 PM CDT Tue Jun 6 2023 This hazardous weather outlook is for portions of eastern North Dakota, west central and northwest Minnesota. .DAY ONE...This Afternoon and Tonight Isolated to scattered thunderstorms will continue into this afternoon and early evening. A few isolated stronger storms will be capable of brief heavy rainfall, frequent lightning, and wind gusts to 50 miles per hour. .DAYS TWO THROUGH SEVEN...Wednesday through Monday The active pattern continues through much of the week, with additional thunderstorm chances in the afternoon and evening hours for Wednesday through Friday. Isolated severe thunderstorms are possible along and west of the Red River Valley Wednesday and Thursday afternoon and evening. Hail to 1 inch and winds to 60 mph would be threats if any severe thunderstorms develop. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated.
The Fargo/Grand Forks radar (KMVX), 63 km away, was scanning. The volume nearest the first event began at 21:27 UTC.
1 thunderstorm wind. Local standard time, as filed.
Estimated 8 inch diameter pine tree snapped a few feet above the ground. Wind gust estimated.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Minnesota in 2023Every state in 2023This day in weather historyWarnings in Minnesota, June 2023
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: 1117671.