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Dec 24-25 Snowstorm part 2


jhamps10

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Skilling:

Despite storm's southern track, winds to its the north are to run the length of Lake Michigan into Chicago raising the potential for lake-effect snows

Snowfalls in Chicago are often the product of a period of "system snow"--snowfall generated by the low pressure itself--and a period of "lake snow"--snow which falls as cold winds blow across warmer lake waters. The system headed this way for the holiday weekend appears likely to follow that model.

While light "system snow" is to spread into Chicago by Friday afternoon and continue into Friday evening, depositing perhaps 1 to 3 inches, lake snows, confined primarily to lakeside counties of Illinois, Wisconsin and northwest Indiana, may keep bursts of snowfall going in those areas much of the holiday weekend.

Lake snows finicky, hitting in waves and accumulating unevenly in mainly lakeside counties

Snow accumulations--notoriously varied in lake-snow events--may continue to grow in areas close to the lake Saturday and Sunday. But the distribution of this snow and precise totals are difficult to pinpoint this far ahead of the system's arrival.

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