San Franciscans are bracing themselves for a significant temperature surge as the National Weather Service has issued a Heat Advisory, starting today at 10 AM and lasting until 11 PM tomorrow. Residents in the highlighted regions, including interior Monterey and San Benito counties, North Bay Interior Mountains, East Bay Interior Valleys and Hills, and the Santa Clara Valley, can expect temperatures stretching into the 90s and low 100s. Some areas may see the mercury push to around 110 by Friday afternoon, particularly those elevated spots in southern Monterey and San Benito counties, according to the National Weather Service.
To cope with the staggering heat, locals of coastal areas can find solace in the cooler temperatures ranging in the 60s and 70s, thanks to a compressing marine boundary layer. Low-level stratus, along with patchy fog and occasional drizzle, is forecasted to roll in each evening and retreat by the subsequent early afternoon. The National Weather Service warned that "A Heat Advisory will begin later this morning at 10 AM and persist through 11 PM tomorrow night for interior portions of the North Bay, East Bay, South Bay and interior portions of Monterey and San Benito counties," as per the National Weather Service.
This heat episode is set to ebb over the weekend with the arrival of a weak upper low/trough, granting a reprieve with conditions reverting to more typical temperatures for the time of year. However, the NWS forecasts the scorching heat to resume by the early stages of next week, peaking around Tuesday and Wednesday. Subsequent relief is predicted later in the week as another disturbance is expected to usher in cooler, near-seasonal average temperatures.
Aviation and marine forecasts might be just as pertinent as temperature warnings for those taking to the skies or the seas. The NWS aviation forecast notifies of mixed visibility conditions that will improve to widespread VFR later this morning, with strong winds of up to 30 knots anticipated through the afternoon and evening. Marine conditions are to be approached with caution as "High pressure over the Eastern Pacific Ocean will be the dominating feature through the forecast period", the National Weather Service reported, forecasting significant wave heights of up to 15 feet in outer waters by Sunday, and a Small Craft Advisory in effect through Friday evening for several zones.
