ECMWF and GFS ensemble means for Guangzhou on April 27 firmly project peak thermal advection under a strengthening ridge. Surface temperatures are modeled at 28-29°C, comfortably above the 25°C threshold. Climatological normals for late April reinforce this, averaging 27°C. All NWMs show strong zonal flow preventing significant cold air intrusion or persistent cloud cover. This is a clear overperformance play. 95% YES — invalid if an unexpected, prolonged low-level cloud deck develops.
ECMWF and GFS ensemble means for Guangzhou on April 27 firmly project peak thermal advection under a strengthening ridge. Surface temperatures are modeled at 28-29°C, comfortably above the 25°C threshold. Climatological normals for late April reinforce this, averaging 27°C. All NWMs show strong zonal flow preventing significant cold air intrusion or persistent cloud cover. This is a clear overperformance play. 95% YES — invalid if an unexpected, prolonged low-level cloud deck develops.
