National Weather Service forecasts for Seattle indicate a high temperature of 50-51°F on March 25, driving trader consensus to a 99.7% implied probability for that bin, backed by consensus across major models like GFS and ECMWF ensembles showing persistent marine layer clouds and cool northerly flow capping daytime heating. Current upper-air patterns feature a deep trough over the Pacific Northwest, maintaining below-normal temperatures consistent with recent weeks' climatology where late March averages hover around 52°F but recent cool snaps have pulled highs down. While short-range confidence is high given proximity to the event, realistic challenges include unexpected breakdown of the cloud deck for increased solar insolation or a shift to warmer southerly winds, with updated guidance expected from NWS morning discussions through March 24.