Quote:
Originally Posted by BroadHopper
... Lake Tahoe never freeze. Some facts to ponder:
The average temperatures for the winter months at Lake Tahoe are
December: 14 degrees Fahrenheit,
January: 15 degrees,
and February 17 degrees.
These temperatures are not cold enough to freeze such a large expanse of water.
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I believe you are quoting the nighttime lows. The winter highs for Tahoe are in the forties, making the overall temperature right about freezing. The average Winnipesaukee air temperature in the winter is in the low twenties, some eight-to-ten degrees cooler.
Water volume is not all that important as evidenced by Lake Baikal (150 times the water of Tahoe and frozen 4 months a year). Once the water temperature is lowered to 39F (4C), only the first foot of water needs to be cooled further. Even in the dead of winter, the lake's bottom is at 39F (4C).
However, I, too, have no idea why Sebago doesn't freeze each year.