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A thunderstorm in spots early
A t-storm around in the p.m.
Showers and a heavier t-storm
of sunlight, then sets at
of moolight, then sets at
Unsettled weather will rule in Atlanta this weekend and into next week, with the chance of thunderstorms each day. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.