A DENSE FOG ADVISORY has once again been issued for Jo Daviess, Carroll, and Whiteside counties beginning at Midnight and lasting through 9am Monday. The fog was quick to clear Sunday thanks to drier air moving in and an increasing wind from the northwest. For the first time in nearly a week visibility area wide made it to 10 miles - which is considered unlimited/full visibility. We even managed to clear some of the cloud cover allowing sunshine to shine bright for a couple hours earlier in the day.
Cloud cover, however, was quick to build back in leaving skies mostly cloudy Sunday evening. Fog has been developing well to the west of the Stateline in Iowa along the back edge of the thicker cloud cover, and it's likely we'll see at least partial clearing take place locally overnight. Wherever we do, temperatures will drop into the 20s, low 20s for some, and fog will redevelop. This is why the dense fog advisory has been issued. It's possible the advisory gets extended further to the east tonight, but there is still a big enough question on clearing to hold off on issuing one right now.
Freezing fog will also be possible and could create some slick conditions, especially on elevated surfaces Monday morning. Some of the fog may lift by Monday afternoon with a little sunshine trying to appear once again. But clouds will be on the increase again ahead of a clipper-like system that'll swing through the Great Lakes Monday night and Tuesday. This will bring with it our next chance for a few light rain showers Monday night, mixed in with some snow showers throughout the day Tuesday. No accumulations are expected, but a few heavier bursts of snow showers will be possible.
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