GFS ensemble mean indicates a +2σ thermal anomaly for Wuhan on April 27. ECMWF concurs, projecting a robust ridge with strong insolation potential. Expect clear sky and warm advection. This pushes surface temperatures to 28°C. 85% YES — invalid if major cold front shifts pattern.
ECMWF ensemble median shows a 13-15°C thermal gradient. Dominant southerly advection post-frontal passage supports a precise 14°C peak, hitting the lower decile. This is a solid lock. 90% YES — invalid if upper-air dynamics reverse.
