When ordinary weather maps don't tell you what the worst of the weather is like out there, I turn to these sources for information.
Twitter, especially. A search this morning for "ann arbor ice" gave plenty of illustrations why it was not suitable to be out walking around. Streets and highways were bad, and a Delta flight slid off the runway at DTW. For Michigan weather follow the #miwx hashtag.
Google Maps with the "traffic" overlay. Zoom way out, and you'll see splotches of red, showing where traffic is moving at significantly lower than posted speeds; zoom in, and you get recent reports from motorists using Waze reporting specific incidents.
Broadcastify's "top feeds". Here you count on citizens monitoring public safety traffic to give you an idea of what kinds of places are working a lot of incidents. The top feeds can also be set up to generate alerts on your phone if you use their mobile app.
Power outage maps, for when storms and incidents get really bad. There's no one single source to go to, but if you can figure out which utility company covers an area, their outage map is a good measure of storm location or path and intensity.
The morning's problem was ice. An unusual and good map of ice risk is the SPIA Index, a metric that combines an ice forecast with a wind forecast to predict damage.