Are you breaking the law if you warm up your car in your state?

While there is no national law against idling a vehicle, some states have anti-idling laws to prevent air pollution. The punishment and exact anti-idling measures vary from state to state, and even city or county, with penalties ranging from fines to written warnings.

Map: What are the odds of a white Halloween?

It doesn't quite have the same ring as a white Christmas, but believe it or not, some parts of the U.S. actually have decent odds of seeing snow on Halloween each year.

La Nina is over and El Nino could be on the way, forecasters say

The climate phenomenon is a by-product of a years-long cycle of water temperatures in the tropical Pacific Ocean known as the El Niño-Southern Oscillation (ENSO) and has been in its cool phase for the past three winters -- a rare feat for an event that typically lasts for one winter, maybe two.