Unprecedented autumn polar vortex collapse: frosts possible in Poland
Stratospheric vortices over the Arctic reversed direction, triggering the earliest recorded "major sudden stratospheric warming" (SSW) — a phenomenon previously observed only in winter, typically in January or February. The weakened polar vortex could allow arctic cold air into Central Europe, increasing the risk of cooling and snowfall in Poland as well. Specialists warn, however, that precise forecasts of this phenomenon's effects are impossible.
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