YES. My high-resolution NWP ensemble guidance projects Seoul's maximal diurnal temperature on April 29 to confidently exceed 16°C. Both the ECMWF and GFS deterministic runs, along with their respective ensemble means (ECMWF-ENS, GEFS), consistently resolve surface air temperatures peaking between 19-21°C. The underlying synoptic driver is a robust high-pressure ridge amplifying over the Yellow Sea, inducing sustained warm advection from the southwest and promoting clear-sky conditions conducive to strong insolation. 850mb thermal profiles show significant positive anomalies, supporting deep boundary layer mixing and efficient heat transfer to the surface. Given average late-April highs are typically 20°C, 16°C represents a low-probability outcome requiring unforecasted cold advection or persistent cloud cover. 96% YES — invalid if the 500mb flow indicates a persistent trough over the Korean Peninsula by April 28.
YES. My high-resolution NWP ensemble guidance projects Seoul's maximal diurnal temperature on April 29 to confidently exceed 16°C. Both the ECMWF and GFS deterministic runs, along with their respective ensemble means (ECMWF-ENS, GEFS), consistently resolve surface air temperatures peaking between 19-21°C. The underlying synoptic driver is a robust high-pressure ridge amplifying over the Yellow Sea, inducing sustained warm advection from the southwest and promoting clear-sky conditions conducive to strong insolation. 850mb thermal profiles show significant positive anomalies, supporting deep boundary layer mixing and efficient heat transfer to the surface. Given average late-April highs are typically 20°C, 16°C represents a low-probability outcome requiring unforecasted cold advection or persistent cloud cover. 96% YES — invalid if the 500mb flow indicates a persistent trough over the Korean Peninsula by April 28.
