Abstract Explosive cyclones (ECs) are mid‐latitude cyclones that rapidly intensify, causing strong local winds and precipitation. Although local characteristics of ECs over Northwest Pacific have been studied extensively, their downstream influences are not well understood. Here, we identify 51 ECs over the Northwest Pacific in November from 2000 to 2022 based on sea level pressure of multiple data sets. We demonstrate that a cross‐Pacific Rossby wave train, triggered by strong latent heat release due to increased precipitation of ECs, can transport substantial energy toward North America (NA). Consequently, an anomalous quasi‐barotropic ridge (trough) forms over the North Pacific (NA). Between them, northerly anomalies lead to cold advection over NA, associated with a negative air thickness anomaly, causing widespread cold anomalies there. Our findings, supported by observations and model experiments, provide novel insights into the downstream effect of ECs, including a potential source of extended‐range predictability for NA temperatures during the Fall season.
Observations from the Little Bunker
Last updated: December 19, 2025 10:10 PM
Atmospheric CO₂
427.2 ppm
+17.7
ppm/year
Atmospheric CH₄
1930.95 ppb
+-3.5
ppb/year
Global Temperature
+1.48 °C
Peak: +1.73°C
World Population
8.1 billion
+67
million/year