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FORECAST CONTEXT

DATA THROUGH 2026-10-12 · UPDATED 2026-10-13 11:02 UTC

ERA5 + GFS2.5°DAILY
BriefingWeather regimesWeather regimes
WR_EAT4S_BL

Scandinavian Blocking · EAT4S

Projection index I_wr onto the Scandinavian Blocking mean pattern (Euro-Atlantic regimes (ECMWF, May–Sep)): standardized area-weighted projection of the normalised anomaly field. — Grams, Ferranti & Magnusson 2020 (ECMWF Newsletter 165)