An upper level low pressure system will bring cool and cloudy conditions to the area through the end of the week. Then, a ridge of high pressure combined with offshore flow will allow for temperatures to gradually warm through the weekend. Cooler and cloudier conditions will return later next week with a small possibility of rain.
Another cool day today with a deepening marine layer, increasing onshore flow, and varying amounts of mid and high clouds from a trough to our west. Pretty similar conditions Friday at least the first half of the day with marine layer clouds likely pushing into interior San Luis Obispo County and possibly up some of the lower coastal mountain slopes. Temps overall about the same as today.
Friday evening there will be a brief northerly surge before the Santa Anas this weekend. Advisory level winds are possible across southern Santa Barbara County.
Big changes for the weekend as surface pressures rise over the great basin following the trough passage, setting up a weak to moderate Santa Ana wind event that will peak on Sunday. Very hot and dry and certainly a fire weather concern for Sunday. Daytime temps will approach record levels in many locations with highs in the upper 80s to lower 90s away from the immediate coast.
One last very warm day on Monday as moderate offshore flow continues but weakens through the day. Coastal areas will likely see some cooling due to an earlier sea breeze but still hot in the valleys.
A significant cooling trend will begin Tuesday and last through the rest of the week. It is still too far out to get a good perspective but there is a slight possibility of a bit of rain on Wednesday or Thursday. Amounts likely less than a quarter inch most areas. Temps mostly in the 60s at lower elevations.