The 15°C high threshold for Busan (RKPC) on April 29 is fundamentally misaligned with late April climatology, which typically sees max temperatures ranging from 18-20°C. Current 00z/06z GFS and ECMWF operational runs, corroborated by KMA LAM forecasts, show robust positive temperature anomalies, driven by a persistent continental high-pressure ridge establishing over the Korean Peninsula. This pattern facilitates significant Warm Air Advection (WAA) from the southwest and strong diurnal heating under projected minimal cloud cover. Surface TDA forecasts for RKPC consistently project peak temperatures in the 19-22°C range. A high registering at or below 15°C would require an anomalous, unforecasted cold air mass intrusion or prolonged, dense stratus deck, which is not indicated by any major ensemble member at this D-3/D-2 juncture. Sentiment: Local weather blogs are trending towards warm, sunny conditions. 95% NO — invalid if a major unforecasted frontal boundary or significant cyclogenesis develops directly impacting RKPC by 06z on D-1.
The 15°C high threshold for Busan (RKPC) on April 29 is fundamentally misaligned with late April climatology, which typically sees max temperatures ranging from 18-20°C. Current 00z/06z GFS and ECMWF operational runs, corroborated by KMA LAM forecasts, show robust positive temperature anomalies, driven by a persistent continental high-pressure ridge establishing over the Korean Peninsula. This pattern facilitates significant Warm Air Advection (WAA) from the southwest and strong diurnal heating under projected minimal cloud cover. Surface TDA forecasts for RKPC consistently project peak temperatures in the 19-22°C range. A high registering at or below 15°C would require an anomalous, unforecasted cold air mass intrusion or prolonged, dense stratus deck, which is not indicated by any major ensemble member at this D-3/D-2 juncture. Sentiment: Local weather blogs are trending towards warm, sunny conditions. 95% NO — invalid if a major unforecasted frontal boundary or significant cyclogenesis develops directly impacting RKPC by 06z on D-1.
