San Franciscans can look forward to slightly cooler temperatures and continued foggy mornings as the marine layer is expected to hover around 1500-2000 feet today, according to the National Weather Service in San Francisco. High temperatures will remain below the seasonal averages, and this trend will persist until Thursday. A slight warming trend will begin on Friday and continue into the weekend. During this period, localized elevated fire weather threats are also present across the higher elevations.
As reported by the National Weather Service, the region experienced another night of widespread stratus, which was more robust and distributed than the previous night. "Expect stratus to continue to seep into the interior valleys of the region over the next few hours, with the daily retreat beginning by mid to late morning," the service indicated. However, areas above the marine layer should watch for elevated fire weather concerns due to slightly warmer and drier conditions. Despite poor to moderate RH recovery, the breezy conditions along the coast and mountain gaps are expected to persist and possibly increase each afternoon and evening.
In aviation news, widespread CIGs are affecting the region, with the CIGs set to continue spreading through the mid-morning. Most Terminal Aerodrome Forecasts (TAFs) locations are projected to go VFR by late morning and early afternoon, except for Half Moon Bay (HAF), where CIGs will linger throughout the TAF period. According to the NWS advisory, winds are anticipated to stay light to moderate in the morning and escalate into late morning and afternoon. In the evening, the IFR CIGs will recommence their movement inland from the coast, affecting all but the interior regions by late night.
For the mariners, the NWS has issued a Small Craft Advisory effective until 3 PM PDT this afternoon for Pt Arena to Pt Reyes 10-60 NM, due to breezy winds and rough seas. "After those winds and seas ease, expect light to moderate winds through Friday with moderate seas," the National Weather Service states.
