Snow and ice Monday night and into the morning will likely impact the Tuesday morning commute, according to the National Weather Service.Temperatures dropped below freezing early Monday night. Another round of snow showers were expected to arrive between 10 p.m. and 11 p.m. before tapering off overnight, said Scott Weishaar, a meteorologist with the weather service.Snow began to accumulate Monday night in areas below 500 feet in elevation. The accumulation is expected to stay below an inch in those areas, with over an inch collecting in higher elevations, according to a forecast form the weather service.Leftover moisture is expected to freeze over and remain frozen through the Tuesday morning commute. Temperatures will likely rise above freezing before noon, Weishaar said.As roads became slick, a number of minor accidents were reported throughout the county after 9 p.m., according to emergency radio traffic monitored at The Columbian.Road crews will spray de-icer on major thoroughfares beginning 4 a.m. Tuesday, according to Clark County Public Works. A map showing primary and secondary route options is available on the county website.