winter storm, Weather Warnings

Several states were under either winter storm warnings or winter weather advisories from the NWS early Monday morning.
The National Weather Service issues a variety of weather warnings and advisories. Here's what they mean in Michigan.
On Tuesday at 3:29 a.m. a winter storm warning was issued by the National Weather Service valid from 10 a.m. until Wednesday 7 a.m. The warning is for Greene, Taliaferro, Spalding, Butts, Jasper, ...
Delivery times for post in over half the country could be impacted due to hazardous weather, the U.S. Postal Service said.