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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_label

Active regime · EAT4S

Euro-Atlantic regimes (ECMWF, May–Sep), nearest centroid. 0 = no regime, 1 = NAO+, 2 = NAO−, 3 = Scandinavian Blocking, 4 = Atlantic Ridge. — Grams, Ferranti & Magnusson 2020 (ECMWF Newsletter 165)