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Italy Set for Arctic Push From 20 November as North Faces Heavy Rain

Cold air entering via the Rhône Valley could spawn a Tyrrhenian low, boosting precipitation and lowering snow levels by next weekend.

Overview

  • Northern and central regions face a wet Sunday with an orange alert in Liguria and the Emilian Apennines, while snow is confined mostly above 1,800–2,000 meters.
  • Forecasts flag particularly intense rainfall in Liguria, with daily totals possibly exceeding 80 mm in central‑western areas and 40–60 mm between southern Piedmont and northern Lombardy.
  • A Mediterranean vortex is expected between Tuesday and Wednesday to shift heavier rain toward the Centre and South after the early‑week disturbances.
  • From Thursday 20 November, forecasters expect an Arctic‑maritime air mass to drive temperatures well below seasonal averages across much of the North and Centre.
  • The incoming flow through the Rhône could help trigger a Tyrrhenian low that enhances precipitation and brings snow to much lower elevations by 22–23 November, potentially even locally on northern plains.