textproduct: Grand Forks

KEY MESSAGES

- Isolated severe thunderstorms are possible in parts of southeast North Dakota Wednesday afternoon and evening.

UPDATE

Issued at 429 AM CDT Tue Aug 18 2026

Remaining few showers are exiting Grant county MN into Douglas county. A few mid level showers in northwest ND near Watford City moving east-southeast. Otherwise skies generally clear north to mostly cloudy south due to high and mid clouds. No weather impacts today. Did update key messaging to include SPC day 2 marginal risk for parts of southeast ND Wednesday afternoon and evening. Confidence on enough instability returning northward is quite low at this time.

UPDATE Issued at 953 PM CDT Mon Aug 17 2026

Thunderstorm risk has ended across most of the area this evening, with only scattered activity along the I-94 and Hwy 10 corridors in west central Minnesota. Temperatures are in the lower 60s along the International Border with low 70s in the southern Red River Valley.

UPDATE Issued at 620 PM CDT Mon Aug 17 2026

Thunderstorms continue to move to the east and southeast this afternoon in west central Minnesota. These storms could become strong to severe at times over the next several hours. Hazards could include large hail and gusty winds.

..Severe Thunderstorm Risk this afternoon and evening

There continues to be a signal within the CAM guidance and some cumulus development ahead of fropa in the central and some accas southern valley suggesting convection develops in lakes region this afternoon and early evening. Timing of this front seems on track from previous forecasts and when this lift or forcing is combined with peak heating and advection of better instability storms are expected to develop in that 5 to 7pm time frame. The strongest of these storms will be marginally severe capable of hail to an inch and winds at most to 70mph, given the dry soundings. Coverage of the severe threat is expected to be isolated at best and limited to just the lakes country and then points to the south and east.

AVIATION /12Z TAFS THROUGH 12Z WEDNESDAY/

Issued at 607 AM CDT Tue Aug 18 2026

Relatively good flying conditions today. Some CU or stratocu around NW MN in the 5000 ft agl range near GFK east to BJI. Otherwise some cirrus in the far south today and scattered cirrus or mid clouds north. Winds today after a light and variable start will be northwest around 10 kts then calm this evening and tonight.

FGF WATCHES/WARNINGS/ADVISORIES

ND...None. MN...None.