No. Ensemble guidance from both GFS and ECMWF indicates a sub-15% probability of breaching 90°F on May 5. Climatology for early May NYC shows mean daily highs firmly in the mid-60s. A strong, persistent upper-level ridge axis over the Northeast, necessary for such extreme warmth, is absent in current pattern projections. Forecasted airmass advection doesn't support extreme heat. 92% NO — invalid if mid-range GFS develops a significant 500mb geopotential height anomaly of +2.5 standard deviations over the Northeast by May 2.
No. Ensemble guidance from both GFS and ECMWF indicates a sub-15% probability of breaching 90°F on May 5. Climatology for early May NYC shows mean daily highs firmly in the mid-60s. A strong, persistent upper-level ridge axis over the Northeast, necessary for such extreme warmth, is absent in current pattern projections. Forecasted airmass advection doesn't support extreme heat. 92% NO — invalid if mid-range GFS develops a significant 500mb geopotential height anomaly of +2.5 standard deviations over the Northeast by May 2.
