Good afternoon!
The image below shows the visibilities around midnight (left) and temperatures around 8 AM (right) tomorrow morning. Temperatures around midnight will be around 32 F and will continue to drop into the morning hours of tomorrow. Note that most of the fog is situated to the east of the Des Moines area. This area of fog/ drizzle will continue to push to the east in the morning hours of tomorrow. Cannot rule out some isolated slick spots developing late tonight into the early morning hours of tomorrow with the combined risk of fog/ drizzle and temperatures at/ below 32 F.
Here is a look at the fog potential by 6 AM tomorrow morning. By this time, most, if not all, the fog should be east of the Des Moines area.
Here is a look at temperatures around noon tomorrow. It is around this time when temperatures can begin to get above freezing for the Des Moines area.
