Synoptic analysis and NWM ensemble consensus (ECMWF, GFS) for Seoul on April 29 consistently project diurnal highs ranging 18-21°C. This 13°C threshold represents a severe undershoot of typical late-April thermal regimes, historically averaging 19.5°C peak. No significant cold advection or anomalous high-latitude troughing is indicated. The market signal on this low-end cap is mispriced; a robust thermal breach is highly probable. 95% NO — invalid if widespread precip suppresses boundary layer warming below 14°C.
Synoptic analysis and NWM ensemble consensus (ECMWF, GFS) for Seoul on April 29 consistently project diurnal highs ranging 18-21°C. This 13°C threshold represents a severe undershoot of typical late-April thermal regimes, historically averaging 19.5°C peak. No significant cold advection or anomalous high-latitude troughing is indicated. The market signal on this low-end cap is mispriced; a robust thermal breach is highly probable. 95% NO — invalid if widespread precip suppresses boundary layer warming below 14°C.
