From my favorite SLO Weathercaster, John Lindsey: 1/20 “At this time, the ridge of high pressure begins to weaken early next week followed by increasing chances of rain near mid-week. Unsettled weather is expected to continue through February.”
1/21 “A major change in the weather pattern is forecast Monday night into Wednesday morning, as a low-pressure system near Baja moves northward along the Central Coast. Since the low is moving out of the south, it will contain subtropical moisture and snow levels will remain above 8,000 feet.
This system will produce increasing southerly winds, cooler temperatures and much-needed rain. At this time, rainfall amounts are expected to range between 0.25 and 0.75 of an inch. Another chance of rain is forecast next Thursday. The unsettled weather pattern will continue through the first week of February.”