On Friday at 3:45 a.m. the National Weather Service released a special weather statement until 10 a.m. for Southern Erie and Crawford County.

"Patchy dense fog will persist through daybreak this morning, including along rivers and streams. Visibility as low as 1/4 mile is expected in the fog. Motorists should be prepared to encounter rapid changes in visibility and are encouraged to slow down and use their low-beam headlights while traveling through fog. Daytime heating is expected to allow the fog to dissipate between 8 a.m. and 10 a.m. this morning," according to the weather service.

Advance Local Weather Alerts is a service provided by United Robots, which uses machine learning to compile the latest data from the National Weather Service.

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