There will be a mix of low and upper-level clouds for our Thursday evening. We will continue to see that cloudy mix, plus some midday sunshine on our Friday. Conditions will be dry for one last day before the weather turns over the weekend.
Low temperatures will be in the upper 30s to 40s in interior areas, and 40s to low 50s for coastal areas on Friday. High temperatures will be mild in the 60s under a temporary ridge of high pressure. A few coastal valleys may approach 70 degrees, but likely won’t break that threshold.
Cloud coverage will increase Saturday morning ahead of the approaching storm. Temperatures will also cool. Light to moderate rain showers will arrive by the afternoon or evening on the Central Coast, spreading southward at night, but fizzling as it goes. This first impulse will produce around a tenth of an inch on the South Coast, up to a half inch on the Central Coast, and up to three quarters of an inch north of Morro Bay.
The timing, duration, and rain totals of the second impulse are a bit lower confidence, as there is still a wide range of outcomes across different weather models. There will be a lull between impulses, and it’s possible that most of Sunday could be dry. It is likely that most rain will come in overnight between Sunday night and Monday morning. It may be heavy at times.