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A damaging thunderstorm
Variable clouds, a t-storm
A few strong p.m. t-storms
Thunderstorms, some severe
Mostly cloudy with t-storms
of sunlight, then sets at
of moolight, then sets at
Dallas will be facing rounds strong storms into the weekend. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.