As someone that has been following lake Erie ice for 15 yrs those maps were wrong. That's not clear ice as evident by the slush on the edges of the real ice sheets. The 2 days later image is because both of those nights had negative lows. Once the freezing process starts it freezes rapidly. However, that above image is not "clear" ice, its water temp at 32 and at beginning stages of icing. Never use maps for lake ice, always use satellite images. Many have used those ice maps in forecasting lake effect snow events and have been quite wrong due to their inaccuracy. For example, last February NWS had no watches/warnings due to maps showing 85% ice coverage. 3' later and they corrected themselves.
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