Grand Forks, North Dakota – Drivers along I-29 and US-2 should prepare for reduced visibility and sharply colder air early Tuesday as a weak cold front slides south, bringing areas of fog and reinforcing a stark north-to-south temperature divide across the Red River Valley.
According to the National Weather Service in Grand Forks, fog developed along the frontal boundary early Tuesday morning and will gradually shift south through midmorning. Visibility may fall below one mile at times, especially in low-lying areas near the Red River and along US-81. Motorists should use low-beam headlights and allow extra stopping distance during the morning commute.
Behind the front, much colder air remains locked in across far northeast North Dakota. High temperatures near the Canadian border may struggle to climb out of the 20s, while communities farther south toward Fargo and the I-94 corridor warm into the 40s. Snowpack across northern counties is contributing to the sharp contrast in temperatures.
By Wednesday afternoon, the front is expected to lift back north, allowing milder air to surge into southeast North Dakota and west-central Minnesota. Highs south of Grand Forks could push into the upper 40s and 50s, while areas closer to the international border remain significantly cooler.
Residents should stay alert for rapidly changing visibility in fog and be prepared for fluctuating temperatures over short distances. Additional updates are expected as the boundary shifts and temperature gradients tighten through midweek.
