Climatological anchors for Austin in mid-May show average highs ~83°F. Current medium-range global ensemble forecasts (GEFS, ECMWF) for May 10 consistently project thermal profiles well above the 58-59°F threshold, tracking zonal flow without significant polar airmass advection. Probability distribution functions from operational runs indicate near-zero likelihood for such a profound negative temperature anomaly. This range is statistically improbable for this period. 98% NO — invalid if a sudden, unforecasted arctic front pushes south of the Red River.
Climatological anchors for Austin in mid-May show average highs ~83°F. Current medium-range global ensemble forecasts (GEFS, ECMWF) for May 10 consistently project thermal profiles well above the 58-59°F threshold, tracking zonal flow without significant polar airmass advection. Probability distribution functions from operational runs indicate near-zero likelihood for such a profound negative temperature anomaly. This range is statistically improbable for this period. 98% NO — invalid if a sudden, unforecasted arctic front pushes south of the Red River.
