National Weather Service United States Department of Commerce

The recent period of cold weather has accelerated ice development on inland lakes and the waters of Green Bay. Since the second week of December, ice has formed on Lake Winnebago and on the southern part of Green Bay. 

Satellite animation.
Satellite animation from December 9 to December 18. Satellite imagery from UW-CIMSS.


The ice is still thin in spots, so officials are advising to use extreme caution when venturing out. Ice conditions on any lake can vary from location to location. Remember, even though it may look thick on the surface, moving water from streams, rivers, and springs can cause ice to form unevenly.