Dense Fog Advisory issued for some Northern Illinois counties

I hope you all had a wonderful Christmas! Cloud cover remained in place for much of the day, resulting in a slow temperature climb. We did however end up mild with highs in the low 40s.

 

Today, little warmer. We do start off the day with fog so if you are traveling back from holiday festivities this morning, use extra caution. The National Weather Service has expanded the Dense Fog Advisory east into northern Illinois to include Stephenson, Carroll, Jo-Daviess, and Whiteside Counties. 

Aside from very spotty drizzle, not issues the rest of the day as conditions remain dry but cloudy. Another round of patchy dense fog is possible overnight with temperatures falling into the low 30s.  Saturday aims to be similar to today. Fog giving way to a mostly cloudy afternoon. Similar temperatures as well as we look to peak in the upper 40s. 

As previously discussed, forecast models have come in much much later with the strong cold front that is scheduled for this weekend. Now, it seems the front will pass through around the late-afternoon and early-evening Sunday. With the later arrival, afternoon highs are trending upward, now expecting to peak in the upper 40s, possible low 50s. The chance for rain will also accompany the frontal passage.   

Post-frontal passage, cold air will quickly spill in from the northwest, dropping temperatures into the lower teens Monday morning. Afternoon highs are only expected to reach the low 20s Monday which comes in 10° below average. 20s remain in place for Tuesday and Wednesday before another round of cold air spills in into the new year.