Synoptic analysis indicates persistent upper-air ridge positioning over the region by May 5, promoting strong subsidence and adiabatic warming. ECMWF ensemble output for May 5 pegs peak surface temperatures at 35-36°C, significantly driven by advective heat flux from inland deserts. Weakening onshore flow will limit sea breeze penetration, preventing significant thermal relief. This convergence of factors makes breaching 33°C highly probable, positioning for a decisive YES signal. 90% YES — invalid if a strong, early-onset sea breeze develops pre-noon.
Synoptic analysis indicates persistent upper-air ridge positioning over the region by May 5, promoting strong subsidence and adiabatic warming. ECMWF ensemble output for May 5 pegs peak surface temperatures at 35-36°C, significantly driven by advective heat flux from inland deserts. Weakening onshore flow will limit sea breeze penetration, preventing significant thermal relief. This convergence of factors makes breaching 33°C highly probable, positioning for a decisive YES signal. 90% YES — invalid if a strong, early-onset sea breeze develops pre-noon.
