GFS ensemble mean for May 11 projects 62°F, well above the 49°F threshold. High-pressure ridge dominates, blocking cold advection. No synoptic pattern supports sub-50°F highs. 95% NO — invalid if major polar vortex disruption occurs.
GFS ensemble mean for May 11 projects 62°F, well above the 49°F threshold. High-pressure ridge dominates, blocking cold advection. No synoptic pattern supports sub-50°F highs. 95% NO — invalid if major polar vortex disruption occurs.