When, Oh When, Will La Niña End?
October 13, 2016
La Niña is still strong and still here. Expect more cold stormy blizzards. Ugh! When will winter finally give us a break?
A typical La Niña winter.
Click to enlarge.
Part of the problems we’ve had is that this winter had two huge weather patterns tag-teaming us—the La Niña and the Arctic Oscillation (AO). In early winter, the AO went negative. The winds around the Arctic weakened and let the cold polar air mass hit Southern California (remember the Pineapple Express floods?) and Florida. Now it’s mid-winter and La Niña rules the weather. Thanks to the Pacific weather pattern, even more cold air visited the states, chilling the Super Bowl.
To put it in football terms, our team just got slammed by two enormous tackles. We didn’t have a chance!
So when will these winter storms finally get the hint and go away?
The Arctic Oscillation is basically a wild card. Fortunately, our understanding of La Nina is better. Scientists have been studying the global impact of the Pacific phenomenon for over a century. Here in the US it normally means cooler temperatures in the Northwest all winter long. In the Midwest and Eastern states, the La Niña usually shapes a warm early winter, a cold mid-winter and a warm late winter and spring. In strong events, like this one, the mid-winter also carries storms down to Dixie.
Since countries all over the world are affected by the La Niña, nations all over the world have created models predicting its behavior. The result is—a mess.
International computer models for how long this La Niña will last are (literally) all over the chart. Click to enlarge.
Basically, almost all of the models agree the miserable phenomenon peaked. It’s as bad as it is going to get. They agree it will last into spring. Most think it will fade before the summer – except for models in the US, Great Britain, Korea and Japan.
If the models are right, the winter storms will ease up in the last weeks of February and most of the nation will enjoy a warm spring. Sounds lovely, doesn’t it?
Going back to football terms (O.K.—I partied through the Super Bowl) – we are almost to the goal line! We have almost made it through this cold and stormy winter to a nice springtime. Except—watch out for that blasted Arctic Oscillation. It’s a wild card!
The temperatures here got down to -22°F and I’m 300 miles north of the Mexican border! Tell us about what winter is doing in your area. (If you are in one of the few warm parts of the nation—here’s your place to brag.
About This Blog
Are you a weather watcher? Welcome to “Weather Whispers” by James Garriss and until recently, Evelyn Browning Garriss. With expertise and humor, this column covers everything weather—from weather forecasts to WHY extreme weather happens to ways that weather affects your life from farming to your grocery bill. Enjoy weather facts, folklore, and fun!
With heavy hearts, we share the news that historical climatologist and immensely entertaining Almanac contributor Evelyn Browning Garriss passed away in late June 2017. Evelyn shared her lifetime of weather knowledge with Almanac editors and readers, explaining weather phenomena in conversation and expounding on topics in articles for the print edition of The Old Farmer’s Almanac as well as in these articles. We were honored to know and work with her as her time allowed, which is to say when she was not giving lectures to, writing articles for, and consulting with scientists, academia, investors, and government agencies around the world. She will be greatly missed by the Almanac staff and readers.