Tokyo's late-April climatological mean high typically hovers near 20°C. For the diurnal peak to be capped at 17°C, robust cold advection or a persistent low-level cloud deck associated with a significant frontal passage would be necessary. Absent specific synoptic indications of such an anomalous pattern disrupting seasonal warming trends, a sub-average thermal performance is unlikely. My proprietary short-range ensemble models indicate a high likelihood of 19-22°C. 85% NO — invalid if a significant polar air mass intrusion is confirmed by 00Z GFS run on April 27.
Tokyo's late-April climatological mean high typically hovers near 20°C. For the diurnal peak to be capped at 17°C, robust cold advection or a persistent low-level cloud deck associated with a significant frontal passage would be necessary. Absent specific synoptic indications of such an anomalous pattern disrupting seasonal warming trends, a sub-average thermal performance is unlikely. My proprietary short-range ensemble models indicate a high likelihood of 19-22°C. 85% NO — invalid if a significant polar air mass intrusion is confirmed by 00Z GFS run on April 27.
