FORECASTCONTEXT.COM · THE LARGE-SCALE STATE BEHIND THE FORECAST BRIEFINGMOTIONOUTLOOKMETHODSAPI☀ AUTO

FORECAST CONTEXT

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

ERA5 + GFS2.5°DAILY
BriefingWeather regimesWeather regimes
WR_PAC4_label

Active regime · PAC4

North Pacific regimes (Fabiano, NDJFM), nearest centroid. 0 = no regime, 1 = Pacific Trough, 2 = PNA+, 3 = PNA−, 4 = Bering Ridge. — Fabiano et al. 2021 (WCD 2, 163)