The National Weather Service San Francisco Bay Area is forecasting a notable cooldown beginning Sunday, with a chance of rain and gusty winds set to sweep through the region. The latest NWS update suggests that while today and Saturday may present us with the warmest temperatures of this forecast period, a significant drop in the mercury will become palpable by Sunday. Temperatures are currently cozy in the low to mid-50s under clear skies, and we are on borrowed time as we are on the cusp of weather changes that promise cooler days.