textproduct: Grand Forks

KEY MESSAGES

-There is a 3 of 5 risk for severe thunderstorms Tuesday afternoon, night, and into early Wednesday morning. Afternoon main hazards would be large hail to size of golf balls, tornadoes, and gusts to 60 mph. For tonight into Wednesday morning, main hazards would be very strong winds to 80 mph, line-embedded brief tornadoes, and hail to the size of quarters. There is also a flash flood risk tonight. -Temperatures on Tuesday afternoon climb into the upper 80s to low and mid 90s, highest within the Red River Valley. A Heat Advisory has been issued for the Red River Valley this afternoon. Those working outside or exercising in directly sunlight or those sensitive to heat will experience impacts.

-There is a 2 of 5 risk for severe thunderstorms Wednesday afternoon east of the Red River. Main hazards include hail to the size of golf balls, wind gusts to 60 mph, and perhaps tornadoes.

..Heat-related impacts this afternoon

As of writing this discussion, heat indices within portions of the Red River Valley are in the upper 90s nearing 100F. Heat indices nearing or just touching 100 F combined with wet-bulb globe temperatures into the low 80s as well as Heat Risk of Moderate to Major (levels 2 and 3 out of 4) within the Red River Valley pushed the need for an Advisory.

These conditions will be impactful to those more sensitive to heat as well as those who are working/exercising outside as well as to those without a means of cooling.

Heat impacts end after sunset this afternoon.

AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/

Issued at 604 PM CDT Tue Jun 9 2026

Severe thunderstorms are forecast to move across eastern North Dakota and northwest Minnesota late this evening and overnight. The most likely time of arrival for KDVL is 02-03Z, KGFK/KFAR 05-07Z, KTVF 06-08Z and KBJI 08-09Z. Damaging wind gusts of 45-55kts is the primary threat with LIFR conditions in heavy precipitation. Large hail will be a greater threat in North Dakota compared to Minnesota. Ahead of the line of thunderstorms, strong southeast winds with gusts of 30-40kts in eastern North Dakota, and 25-30kts in northwest Minnesota will continue this evening. Low level wind shear is also likely this evening and tonight with even stronger winds just off of the surface. Westerly winds are forecast on Wednesday with scattered to numerous thunderstorms, some strong to severe.

FGF WATCHES/WARNINGS/ADVISORIES

ND...Heat Advisory until 8 PM CDT this evening for NDZ008-016-027- 029-030-039-049-052-053. MN...Heat Advisory until 8 PM CDT this evening for MNZ001>004-007- 029-030-040.