Several counties in the Tri-State, including Hamilton, have issued snow emergencies early Tuesday morning after overnight snowfall blanketed the region.The National Weather Service has issued a Winter Weather Advisory for the en tire Tri-State until 10 a.m. Tuesday morning.Related: You can check the full forecast hereOhio: Hamilton County Level 1 Clermont County Level 1 Warren County Level 2 Clinton County Level 1 Butler County Level 1 Adams County Level 2Kentucky Kenton County Level 1 Boone County Level 1 Grant County Level 2Indiana Dearborn County YellowWhat emergency levels mean:There are three levels of snow emergencies. In general, vehicles must be removed from public roads during a snow emergency. While there may be slight variations from one community to the next, these are the general definitions:LEVEL 1: Roadways are hazardous with blowing and drifting snow. Roads may also be icy. Drive carefully. Motorists must move cars from snow emergency routes.LEVEL 2: Roadways are hazardous with blowing and drifting snow. Only those who feel it is necessary to drive should be out on the roads. Contact your employer to see if you should report to work.LEVEL 3: All roadways are closed to non-emergency personnel. No one else should be out during these conditions unless it is absolutely necessary to travel or a personal emergency exists. All employees should contact their employer to see if they should report to work. Those traveling on the roads may subject themselves to arrest. ...read more read less