Tokyo's climatological normals for late April show average lows of 9-10°C. The proposed -18°C represents an extreme thermal anomaly, far beyond historical record minimums which typically hover around 0°C for April. Synoptic patterns offer no indication of unprecedented polar air advection capable of such an outlier event. This forecast lacks any meteorological basis. 100% NO — invalid if a sudden stratospheric warming leads to an unprecedented polar vortex disruption over Japan.
Tokyo's climatological normals for late April show average lows of 9-10°C. The proposed -18°C represents an extreme thermal anomaly, far beyond historical record minimums which typically hover around 0°C for April. Synoptic patterns offer no indication of unprecedented polar air advection capable of such an outlier event. This forecast lacks any meteorological basis. 100% NO — invalid if a sudden stratospheric warming leads to an unprecedented polar vortex disruption over Japan.
