ECMWF 00z and GFS 06z show robust model consensus for an upper-level ridge building over the Pacific Northwest by April 28. 850mb temps are projected to rise to +8C, allowing for a significant warming trend. The ensemble spread for Seattle's surface high is tightly clustered between 63-66°F, with minimal marine push. This aligns perfectly for the 64-65°F target. The thermal inversion will be weak. 92% YES — invalid if a persistent onshore flow develops.
ECMWF 00z and GFS 06z show robust model consensus for an upper-level ridge building over the Pacific Northwest by April 28. 850mb temps are projected to rise to +8C, allowing for a significant warming trend. The ensemble spread for Seattle's surface high is tightly clustered between 63-66°F, with minimal marine push. This aligns perfectly for the 64-65°F target. The thermal inversion will be weak. 92% YES — invalid if a persistent onshore flow develops.
