Isolated flash flooding was observed across portions of Grand Forks County.
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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.
Isolated flash flooding was observed across portions of Grand Forks County.
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 Jul 15, 1:33 PM CST, 3 hours 8 minutes earlier.
Area Forecast Discussion National Weather Service Grand Forks ND 233 PM CDT Thu Jul 15 2021 .SHORT TERM...(This evening through Friday night) Issued at 226 PM CDT Thu Jul 15 2021 Decreasing impacts are expected tonight as southwesterly winds increase and help scour out the low-level smoke across eastern ND and west central MN. A few weak cells may develop west of the valley this afternoon but will be short-lived and erode after sunset. High pressure now over the top of Lake Superior is resulting in increasing return flow into central ND. The increase in WAA is resulting in widely isold showers/possible a clap of thunder from the upper James Valley into the northern Red River Valley, where MLCAPE values are around 500 to 750 J/Kg. Shear values continue to remain nil so any cells that develop will be rather slow moving and short lived. More likely to see some spits of rain with this activity, although some small hail with the strongest storms is possible. The SW winds are improving visibilities across eastern ND and smoke smell is not as noticeable, however some reports or irritated eyes remain. Will keep FU in on the east side of the river where winds will be lighter and persist through mid-morning Friday. South winds increase more in velocity tomorrow, resulting in highs in the upper 80s and lower 90s. There is potential for elevated smoke from fires over the PAC NW to move into eastern ND late in the period, which could impact afternoon highs. This episode should not be as noticeable at the surface. Overall, a dry and breezy next couple of days as a hotter airmass returns to the area. .LONG TERM...(Saturday through Thursday) Issued at 226 PM CDT Thu Jul 15 2021 Overall dry and warm conditions are expected across the region in the extended time frame. Ensemble guidance brings the strong upper ridge to the area this weekend and through the first part of the week with the heat wave having a high confidence of occurrence. Short term impacts will primarily be tied to above normal summer temperatures with highs in the mid to upper 90s most likely with some guidance suggesting triple digits are possible on the warmest days of Tuesday and Wednesday when the thermal ridge axis settles over the area. Long term impacts would be to enhance the ongoing drought conditions and deteriorating crop conditions. As the upper ridge weakens, weak short wave activity and weak surface wind shifts or boundaries will eventually bring the chance for thunderstorms by Tuesday night or Wednesday to the northern half of the area. This will bring cooler temps however still above normal temps to the area. && .AVIATION...(For the 18Z TAFS through 18Z Friday afternoon) Issued at 1235 PM CDT Thu Jul 15 2021 Increasing SW winds will help improve vsbys related to smoke for the remainder of the afternoon. Otherwise, mostly clear skies with exception of TVF/BJI seeing remnants of earlier convective activity...those clouds should thin out/move east by end of first six hour period. && .FGF WATCHES/WARNINGS/ADVISORIES... ND...None. MN...None. SHORT TERM...Speicher LONG TERM...JK AVIATION...Speicher
Hazardous Weather Outlook National Weather Service Grand Forks ND 246 PM CDT Thu Jul 15 2021 MNZ001>009-013>017-022>024-027>032-040-162000- 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- 246 PM CDT Thu Jul 15 2021 This hazardous weather outlook is for portions of west central and northwest Minnesota. .DAY ONE...This Afternoon and Tonight Smoke from Canadian wildfires will bring poor air quality to portions of northwestern and west central Minnesota today and tonight. Sensitive groups such as people with lung and heart disease as well as the very old and very young, may experience negative affects of breathing in the unhealthy air. Some portions of northwestern Minnesota near the Red River Valley could see air quality become bad enough to be unhealthy for all people. .DAYS TWO THROUGH SEVEN...Friday through Wednesday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. NDZ006>008-014>016-024-026>030-038-039-049-052>054-162000- Towner-Cavalier-Pembina-Benson-Ramsey-Eastern Walsh-Eddy-Nelson- Grand Forks-Griggs-Steele-Traill-Barnes-Cass-Ransom-Sargent- Richland-Western Walsh- 246 PM CDT Thu Jul 15 2021 This hazardous weather outlook is for portions of eastern North Dakota. .DAY ONE...This Afternoon and Tonight Isolated storms are possible west of the valley late this afternoon into the early evening. Small hail and lightning are the primary threats, and coverage will be very isolated. Smoke from Canadian wildfires may bring breathing problems for sensitive groups through the evening hours.. .DAYS TWO THROUGH SEVEN...Friday through Wednesday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. Speicher
Special Weather Statement National Weather Service Grand Forks ND 336 PM CDT Thu Jul 15 2021 NDZ027-152100- Grand Forks ND- 336 PM CDT Thu Jul 15 2021 ...SPECIAL WEATHER STATEMENT... At 335 PM CDT, Doppler radar was tracking a strong thunderstorm near McCanna, or 25 miles west of Grand Forks. This storm was nearly stationary. Penny sized hail and winds in excess of 40 mph will be possible with this storm. This strong thunderstorm will be near... Honeyford and Arvilla around 400 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... To report severe weather, contact your nearest law enforcement agency. They will relay your report to the National Weather Service office in Grand Forks. && LAT...LON 4799 9773 4811 9761 4803 9735 4784 9746 TIME...MOT...LOC 2035Z 300DEG 4KT 4800 9759 JK
The Fargo/Grand Forks radar (KMVX), 52 km away, was scanning. The volume nearest the first event began at 22:41 UTC.
3 flash flood. Local standard time, as filed.
Report and video of water flowing over and washing out a county road. Posted via social media.
Increased flooding developing in Hegland Township. Roads washing over in several locations and barricades going up.
Overland flooding developed across central and northern portions of Hegland Township, with flood waters washing over farmyards and roadways in route to smaller coulees and into the Turtle River.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Dakota in 2021Every state in 2021This day in weather historyWarnings in North Dakota, July 2021
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: 975836, 975837, 975838.