Super El Niño, Polar Vortex Collapse Could Hit US At Same Time
Summary
A strengthening El Niño and an unusually early polar vortex collapse could both affect U.S. weather in the coming weeks. Forecasts cited in the article call for a brief cold spell in parts of the northern Midwest and Northeast in early November, followed by generally warmer-than-average conditions in November.Key Facts
- NOAA forecasters expect El Niño to reach peak strength this winter.
- El Niño involves unusually warm equatorial Pacific waters and weakened trade winds.
- Meteorologist Jeff Berardelli said the polar vortex collapse appears to be the earliest on record, about a month earlier than previous events.
- AccuWeather meteorologist Alex DaSilva said the early timing may limit the amount of Arctic cold available to move south.
- The northern Midwest and Northeast are expected to have below-average temperatures during the first week of November.
- DaSilva expects El Niño’s influence to favor above-average temperatures across the U.S. during the rest of November.
- El Niño often brings warmer, drier winter weather to the northern U.S. and wetter, stormier conditions to the South.
- A weakened or split polar vortex can send Arctic air toward the mid-latitudes, but that does not guarantee a major U.S. cold outbreak.
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