Cold air and moisture bring rain. Expect travel delays to NFL tailgates. Ole Miss-Oklahoma game moved to Sunday but faces cold and rain. See the forecast here.

Pacific storm systems will bring heavy rain, strong winds and dangerous marine conditions to the West Coast and eventually the rest of the West this week.

Sprites are brief red flashes of light high above thunderstorms. Learn what they are and how your photos can help NASA's Spritacular project study them.

It's still gaining steam and likely to become record strong. Here's how this El Niño is already impacting weather in the U.S., including rain and temperatures.

This was a weird early warping of the polar vortex. It could cool parts of the U.S. later this month, but El Niño will also have a say in the weather pattern.