The National Weather Service issued a winter storm warning for Seneca County to remain in effect until 5 p.m. today.
Tiffin declared a snow emergency for the city effective at 3 p.m. Tuesday.
To assist the city in plowing streets, all residents who are able should remove their vehicles from streets, according to a statement from Mayor Aaron Montz.
Residents should also clear fire hydrants when shoveling to better assist emergency services in the event a hydrant is needed.
All residents and businesses must clear sidewalks 12 hours after the snow subsides.
The city is to plow main streets, hills and bridges first, Montz said. School zones and side streets are to be completed when main areas are cleared.
Under the NWS winter storm warning, blowing and drifting could make travel difficult, with visibility down to a quarter-mile at some times.
Only a few accidents were reported in Seneca County Tuesday evening as snowfall began, a Seneca County Sheriff's Office spokeswoman said. No injuries were reported in any of the accidents, she said.
The National Weather Service website said most snowfall is to occur before 3 p.m. today. Total snow accumulation is reported to be up to 12 with a high of 26 degrees.