Hitting an exact 20.0°C Tmax for Mexico City on May 5 is statistically improbable given temperature's continuous nature. Climatological May averages show Tmax typically in the 26-28°C range. Current high-resolution NWP ensembles (GFS, ECMWF) consistently forecast Tmax well above 25°C, signifying a strong positive thermal anomaly relative to a 20°C target. This makes an exact 20°C without a severe, unforecasted cold air advection highly unlikely. 90% NO — invalid if the official sensor records precisely 20.0°C.
Hitting an exact 20.0°C Tmax for Mexico City on May 5 is statistically improbable given temperature's continuous nature. Climatological May averages show Tmax typically in the 26-28°C range. Current high-resolution NWP ensembles (GFS, ECMWF) consistently forecast Tmax well above 25°C, signifying a strong positive thermal anomaly relative to a 20°C target. This makes an exact 20°C without a severe, unforecasted cold air advection highly unlikely. 90% NO — invalid if the official sensor records precisely 20.0°C.
