WR_PNA4_label
Active regime · PNA4
Pacific–North American regimes (Straus, 200 hPa), nearest centroid. 0 = no regime, 1 = Alaskan Ridge, 2 = Arctic Low, 3 = Pacific Trough, 4 = Arctic High. — Straus, Corti & Molteni 2007 (J. Climate 20, 2251)
DATA THROUGH 2026-10-12 · UPDATED 2026-10-13 11:02 UTC
Pacific–North American regimes (Straus, 200 hPa), nearest centroid. 0 = no regime, 1 = Alaskan Ridge, 2 = Arctic Low, 3 = Pacific Trough, 4 = Arctic High. — Straus, Corti & Molteni 2007 (J. Climate 20, 2251)