High pressure aloft with a weak offshore flow will keep temperatures above normal today and Friday. Starting Saturday and continuing into the middle of next week, low pressure will develop over the Pacific Coast. This will bring cooler temperatures for all areas as well as an increase in late night and morning clouds and fog.
At the upper levels, a weak low currently over Arizona will move northeast resulting in a slight increase high pressure across the area. Near the surface, weak wind gradients will persist through Friday with increasing onshore flow on Saturday.
For tonight and Friday morning, high resolution forecast models indicate stratus clouds will be limited to the LA coast. By Friday night and Saturday morning, stratus clouds should be more widespread across the Central Coast and Ventura/LA county coasts. Other than morning clouds, skies should remain mostly clear through Saturday. As for temperatures, today and Friday will be warm days with most areas several degrees above seasonal averages.
On Saturday, the increasing onshore flow will bring temperatures down slightly for the entire area. There will continue to be some locally gusty north to northeast winds during the night and morning hours through Saturday with onshore winds developing each afternoon. Wind speeds will likely remain well below advisory levels.
For the longer term, a low in the upper levels develops in the Pacific Northwest then moves over Northern California by Tuesday. On Wednesday, forecast models diverge with one dropping the low south into Central California while another moves it northward into Oregon. Either way, onshore flow will gradually increase through the period. Expect a cooling trend with increasing marine layer cloud coverage across the coasts and valleys Sunday through Tuesday with temperatures dropping slightly below seasonal averages.
TODAY: Sunny amd Warm, highs 85-89 with NE winds 10-20 mph.
TONIGHT: Clear with morning lows in the middle 50s. Variable winds.
FRIDAY: Sunny with highs in the upper 80s. Wind NE 10 to 20 mph.
Check out all the details on your 7 Day Forecast.