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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_NA4_GH

Greenland High · NA4

Projection index I_wr onto the Greenland High mean pattern (North American regimes (4 + no regime, year-round)): standardized area-weighted projection of the normalised anomaly field. — Lee, Tippett & Polvani 2023 (J. Climate 36, 7091)