Lake-effect snow is intensifying downwind of the Great Lakes as cold northwesterly winds sweep across the region. Expanding snow bands are producing moderate to heavy snowfall, significantly reducing visibility and creating perilous travel conditions. The National Weather Service has issued advisories, warning of intense snowfall rates, particularly in areas favored by lake-effect enhancement. Residents are urged to closely monitor weather forecasts and prepare for rapidly changing road conditions throughout Monday evening and into the start of the week.