The polar vortex just did something it has never done in November. Its winds flipped around on November 10. The change is making people search for answers across Canada. Here is what happened, and what it could mean for winter.
What Happened
The polar vortex is a ring of strong winds high above the North Pole. It sits about 30 kilometres above the Arctic. Most of the time, the winds blow around the North Pole like a fast river. As of November 10, those winds have flipped around. The change has never happened this early in November before.
The wind speed is now -0.1 metres per second. That is only 4% of its normal value. The normal speed is about 25 metres per second, which is as fast as a car on a highway. The flip was caused by warm air over Siberia, a strong El Niño, and a sudden warming high in the sky. Siberia had its warmest October on record, and the El Niño is breaking records too.
Why People Are Talking About It
People are talking about it because the polar vortex shapes winter weather. When it is strong, it holds cold air near the North Pole. When it flips, that cold air can wander. A flip this early has never been seen before, so weather watchers are paying close attention.
What Happens Next
The Weather Network says the next few days are the key test. From November 10 to 13, the vortex will go through a historic disruption. From November 14 to 20, it should start to recover. By the third week of November, the winds should be back to normal, over 25 metres per second. Early December is still a wild card.
For now, the Pacific jet stream could bring warmer than usual weather to the heart of Canada. The coldest air is sitting over Siberia instead. But a cold blast can still come in December, even when the models look warm. The Weather Network will share its Winter Forecast on November 25, and that will give a clearer picture.
Final Thoughts
The polar vortex flip is a big weather event, but it is not a forecast by itself. Winter is still weeks away, and a lot can change. The best move is to watch the Winter Forecast on November 25. Until then, enjoy the mild days, and keep a warm coat handy.
Disclaimer: This article is for educational and informational purposes only and does not constitute financial advice.