We can have record-setting blizzards and global warming at the same time. NOAA scientists explain climate variability, how it influenced our weather this winter, and how it differs from climate change.

After some very cold weather this month, folks are likely wondering if the early chill is a harbinger of things to come this winter. "Not necessarily," explains Mike Halpert of NOAA's Climate Prediction Center in this week's ENSO blog post.

How does El Niño affect U.S. winter temperature and precipitation?