NO. The latest ensemble runs from global numerical weather prediction models indicate a high probability of London exceeding 16°C on April 27. The ECMWF 51-member ENS mean for maximum surface temperature is currently pegged at 18.7°C, with the 25th percentile still at a robust 17.1°C. Similarly, GFS 0z operational runs for the period reinforce a dominant high-pressure system across Southern England, facilitating sustained warm advection from continental Europe. 850mb temperature anomaly charts depict a clear 3-sigma positive deviation from climatological normals, signifying anomalous warmth aloft. No significant cold frontal passages or polar air mass intrusions are currently modeled to suppress surface temperatures. Geopotential height anomalies at 500mb remain strongly positive, promoting subsidence and precluding any substantial diurnal cooling effects. The probability density function is heavily skewed above the 16°C threshold. 95% NO — invalid if a rapid cyclogenesis event develops west of Ireland by April 24, steering a vigorous cold front across the UK.
NO. The latest ensemble runs from global numerical weather prediction models indicate a high probability of London exceeding 16°C on April 27. The ECMWF 51-member ENS mean for maximum surface temperature is currently pegged at 18.7°C, with the 25th percentile still at a robust 17.1°C. Similarly, GFS 0z operational runs for the period reinforce a dominant high-pressure system across Southern England, facilitating sustained warm advection from continental Europe. 850mb temperature anomaly charts depict a clear 3-sigma positive deviation from climatological normals, signifying anomalous warmth aloft. No significant cold frontal passages or polar air mass intrusions are currently modeled to suppress surface temperatures. Geopotential height anomalies at 500mb remain strongly positive, promoting subsidence and precluding any substantial diurnal cooling effects. The probability density function is heavily skewed above the 16°C threshold. 95% NO — invalid if a rapid cyclogenesis event develops west of Ireland by April 24, steering a vigorous cold front across the UK.
