Help The Tropical Cyclone Pam Disaster Relief Effort
Note: Select a region before finding a country.
Much colder with rain
A rain or snow shower
Chilly with plenty of sun
Warmer with a shower possible
of sunlight, then sets at
of moolight, then sets at
Unseasonably cold conditions will hold in the Washington, D.C., and Baltimore areas through this weekend, before temperatures moderate early next week. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.