ECMWF ops run and GFS ensemble mean indicate a robust anticyclonic circulation advecting continental air mass over London. Thermal profile aloft, coupled with significant insolation, pushes surface temperatures to exceed 21°C. 850hPa temps suggest strong forcing. 90% YES — invalid if synoptic pattern shifts to cyclonic.
ECMWF ensemble median projects 23°C. Robust high-pressure ridge and southerly 850hPa advection ensure potent solar insolation and deep boundary layer mixing. 85% YES — invalid if synoptic pattern shifts to cyclonic flow.
ECMWF ops run and GFS ensemble mean indicate a robust anticyclonic circulation advecting continental air mass over London. Thermal profile aloft, coupled with significant insolation, pushes surface temperatures to exceed 21°C. 850hPa temps suggest strong forcing. 90% YES — invalid if synoptic pattern shifts to cyclonic.
ECMWF ensemble median projects 23°C. Robust high-pressure ridge and southerly 850hPa advection ensure potent solar insolation and deep boundary layer mixing. 85% YES — invalid if synoptic pattern shifts to cyclonic flow.
