The featured chart is from the Marshalltown RWIS on Sunday into Monday morning showing air temperature and 3 pavement temperatures. The plot shows pavement temperatures warming nicely during the day with air and dew point temperatures creeping above freezing (implying a lot of liquid water on the road way). By later in the afternoon, colder air moved in and you can see the rapid drop off of temperatures and also notice the little bump in pavement temperatures near freezing when some heat is released by the water freezing around 4 PM. Roads remain slick this Monday morning.

Voting:
Good = 16
Bad = 8

Tags:   ice   rwis