National Weather Service forecast models have converged on a high of 53–56°F at Seattle-Tacoma International Airport for May 16, reflecting the primary driver of current trader sentiment. A recent cold front has established southwesterly onshore flow that advects cool, moist marine air across the region, sustaining scattered showers and widespread cloud cover that limit solar heating. This unseasonably cool pattern sits well below the May climatological average near 66°F following record warmth near 82°F on May 12. Key uncertainties differentiating the tightly clustered 52–55°F outcomes include afternoon clearing potential versus persistent stratus and the exact timing of precipitation, both of which could suppress or allow a 2–3°F warmer peak. Afternoon NWS updates and boundary-layer observations will refine these ranges ahead of resolution.