Aggressive analysis of GFS and ECMWF operational runs, along with their respective ensemble means, indicates a high probability of Buenos Aires (SABE) exceeding 18°C on May 10. The GFS 06z run projects a Tmax of 19.3°C, while the ECMWF operational is slightly conservative at 18.8°C. The GEFS and EPS ensemble means converge tightly, averaging 19.0°C with a standard deviation of only 0.8°C, pointing to robust model consensus. This uplift is driven by persistent northerly thermal advection under a developing anticyclonic ridge, preventing significant cold air mass incursions. Boundary layer dynamics, supported by adequate solar insolation for late autumn, will facilitate efficient surface warming. Probabilistic output from the combined ensembles assigns a 78% likelihood of Tmax exceeding the 18°C threshold. Sentiment: Local SMN forecasts are also aligning with a mild, slightly above-average day. 78% YES — invalid if a strong, unforecasted polar frontal passage occurs before 00Z May 10 impacting SABE's thermal profile.
Aggressive analysis of GFS and ECMWF operational runs, along with their respective ensemble means, indicates a high probability of Buenos Aires (SABE) exceeding 18°C on May 10. The GFS 06z run projects a Tmax of 19.3°C, while the ECMWF operational is slightly conservative at 18.8°C. The GEFS and EPS ensemble means converge tightly, averaging 19.0°C with a standard deviation of only 0.8°C, pointing to robust model consensus. This uplift is driven by persistent northerly thermal advection under a developing anticyclonic ridge, preventing significant cold air mass incursions. Boundary layer dynamics, supported by adequate solar insolation for late autumn, will facilitate efficient surface warming. Probabilistic output from the combined ensembles assigns a 78% likelihood of Tmax exceeding the 18°C threshold. Sentiment: Local SMN forecasts are also aligning with a mild, slightly above-average day. 78% YES — invalid if a strong, unforecasted polar frontal passage occurs before 00Z May 10 impacting SABE's thermal profile.
