GFS/ECMWF 00z runs show tight 64-65°F clustering for ORD, mean at 64.3°F. Strong warm advection with minimal cloud cover boosts surface temps into the target window. 85% YES — invalid if cold frontal passage accelerates.
GFS/ECMWF 00z runs show tight 64-65°F clustering for ORD, mean at 64.3°F. Strong warm advection with minimal cloud cover boosts surface temps into the target window. 85% YES — invalid if cold frontal passage accelerates.