National Weather Service forecasts for Denver on May 15 indicate a high temperature near 91°F under mostly sunny skies with light winds, fueling the market's overwhelming 99.7% implied probability for 74°F or higher as trader consensus reflects strong model agreement on peak heating. A persistent upper-level ridge over the Rockies promotes subsidence aloft, suppressing clouds and convection during afternoon hours when temperatures typically maximize, consistent with current observations already exceeding 80°F midday. This setup exceeds mid-May climatological normals around 72°F. Realistic challenges include unexpected mid-level cloud incursions from peripheral thunderstorms or a sudden wind shift introducing cooler air, though guidance shows low precipitation odds (under 20%) and high confidence through evening updates.