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Low clouds and warmer
Warmer with clouds and sun
More clouds than sun
of sunlight, then sets at
of moolight, then sets at
A storm will bring a wide range of weather to the West into this weekend as it drops across California and turns eastward toward the Rockies and High Plains. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.