Story perspectives

Polar Vortex Disruption Promises Coldest December in Years

11/25/2025

Summary

Story summary

A Sudden Stratospheric Warming (SSW) event is expected to disrupt the polar vortex, bringing colder temperatures to New England late November–mid-December 2025.
The weakening vortex will allow Arctic air to move southward, increasing cold spells and early winter storms.
Forecasts indicate temperatures could fall 10 to 15 degrees below normal, with snow possible.
This instability could make December one of the coldest Decembers in years, with impact clearer soon.

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Story summary

A Sudden Stratospheric Warming (SSW) event is expected to disrupt the polar vortex, bringing colder temperatures to New England late November–mid-December 2025.
The weakening vortex will allow Arctic air to move southward, increasing cold spells and early winter storms.
Forecasts indicate temperatures could fall 10 to 15 degrees below normal, with snow possible.
This instability could make December one of the coldest Decembers in years, with impact clearer soon.