Bay Area residents can expect a classic case of June Gloom this week, with a pattern of cloudy mornings and breezy clearings in the afternoon. Coastal areas are primed for cooler temperatures peaking in the 60s, while inland spots are warming up to the 80s, with overall lows in the 50s during the nights. The NWS San Francisco predicts a slight uptick in warmth as we head into the weekend and the following work week.
Today and tonight, the June Gloom persists, bringing with it patchy coastal drizzle and robust onshore winds of up to 40 mph in certain areas, providing that stark contrast between the coastal chill and the inland warmth, the marine layer, meanwhile, continues to creep inland with a decent reach into the Bay and valley areas. Coastal drizzle and fog are on the likely side for tonight, and with consistent onshore flow, the likelihood appears strong for a reprise of this morning's conditions.
Looking out towards the long-term, from Thursday through next Tuesday, changes are subtle but result in a gradual warming trend, the upper ridge of high pressure building over the Pacific Northwest and Northern California will yield daytime temperatures in the upper 70s to upper 90s away from marine influence, while coastal and bay areas will feel a milder upper 50s to lower 70s. "Not much of a HeatRisk concern during this timeframe," the National Weather Service confidently communicated, though they did hint at possible Sierra crest region thunderstorm activity because of an upper-level low meandering off the coast.
In terms of marine conditions, for today through Monday, gale force winds will challenge the far NW coastal waters, creating rough seas but these are expected to settle within the next couple of days, although a southerly coastal jet will blast strong onshore winds through the San Francisco Bay and across the Golden Gate tonight. Mariners, you've been warned, a Small Craft Advisory is in effect from 9 PM this evening to 3 PM Thursday for areas near Pt Reyes to Pigeon Pt, and north of the Bay Bridge. Meanwhile, a Gale Warning is firmly set for Pt Arena to Pt Reyes till early Thursday morning.
