ECMWF and GFS 12z/18z ensembles consistently project Austin highs for April 27 firmly in the low-to-mid 80s, driven by an amplifying upper-level ridge and strong thermal advection. Surface analysis shows no cold air advection or persistent cloud deck to cap temps in the 78-79°F range. This specific band is an undershoot based on current model consensus and synoptic forcing. 90% NO — invalid if a late-developing cold front stalls directly over Austin.
ECMWF and GFS 12z/18z ensembles consistently project Austin highs for April 27 firmly in the low-to-mid 80s, driven by an amplifying upper-level ridge and strong thermal advection. Surface analysis shows no cold air advection or persistent cloud deck to cap temps in the 78-79°F range. This specific band is an undershoot based on current model consensus and synoptic forcing. 90% NO — invalid if a late-developing cold front stalls directly over Austin.
