With temperatures near or below freezing, isolated slick spots on
roads will be possible tonight, particularly on untreated
surfaces, in any areas of standing water and elevated surfaces.
A weather system moving from the Dakotas to southern Wisconsin
will bring a mix of light rain, light freezing rain and light snow
to the area overnight into Wednesday morning, along with some
patchy fog. Snow amounts should be less than an inch, with a
couple hundredths of ice accumulation possible.
Pavement temperatures may continue to be cold enough for fog, rain
or drizzle to freeze, even if air temperatures are a little above
freezing. Treated roads will likely stay wet, but less traveled
and untreated roads along with sidewalks and parking lots could
become slippery even if drizzle is not freezing on cars, trees or
other above ground objects.
If you are traveling tonight into Wednesday morning, use extra
caution and allow a little extra travel time.