Pacific jet shift (PC2) — Forecast Context

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FORECASTCONTEXT.COM · THE LARGE-SCALE STATE BEHIND THE FORECAST BRIEFING MOTION OUTLOOK METHODS API ☀ AUTO

FORECAST CONTEXT

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

ERA5 + GFS2.5°DAILY

BriefingJets & blockingJet streams

NPJ_PC2

Pacific jet shift (PC2)

Second EOF: positive = jet exit shifted poleward, negative = equatorward. — Winters, Keyser & Bosart 2019