Note: Select a region before finding a country.
A couple of showers and thunderstorms
A stray afternoon t-storm
A t-storm in the afternoon
A shower and t-storm around
Clouds and sun with a t-storm
Thunderstorms may threaten outdoor activities each day through Saturday more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.