GFS/ECMWF ensemble means converge on 90-92°F for ATL. Strong mid-level ridge + southerly advection signals extreme heat anomaly. Early May 90s are rare but the pattern is locked. 85% YES — invalid if ridge breaks down significantly.
GFS/ECMWF ensembles converge on 89°F mean, but the 90th percentile pushes 91°F. Dominant mid-level ridge and clear skies ensure maximum boundary layer heating. The 90-91°F window is high-probability. 75% YES — invalid if max temp < 90°F.
GFS/ECMWF ensemble means converge on 90-92°F for ATL. Strong mid-level ridge + southerly advection signals extreme heat anomaly. Early May 90s are rare but the pattern is locked. 85% YES — invalid if ridge breaks down significantly.
GFS/ECMWF ensembles converge on 89°F mean, but the 90th percentile pushes 91°F. Dominant mid-level ridge and clear skies ensure maximum boundary layer heating. The 90-91°F window is high-probability. 75% YES — invalid if max temp < 90°F.