Observing & Predicting

Uncommon atmospheric circumstances spawned a pair of tropical cyclones in the western Pacific—one on either side the equator, at nearly the same longitude, at nearly the same time. Why are twin cyclones more common during El Niño?

Thursday, December 1, 2011

  • The U.S. had its fourth warmest winter on record. In this episode of ClimateCast, NOAA’s Deke Arndt recaps the 2011-2012 winter.