NWS Forecast Office San Diego, CA

Extremely low relative humidity values will combine with Santa Ana winds to produce critical fire weather conditions through Friday morning. Widespread minimum relative humidity values of 5-10% for inland areas, and 10-15% for coastal areas.

Showers likely and a slight chance of thunderstorms with the snow level lowering to around 4000 feet. 50-70% chance of rainfall exceeding 0.25" for the coasts and valleys. 30-40% chance of liquid equivalent precip exceeding 0.75" in the mountains.

Well above average for the coasts and valleys; near average for mountains and deserts. For the coastal areas: 75 to 80, western valleys and inland Orange County: 76 to 81, inland valleys: 67 to 77, mountains between 4000 ft and 7000 ft: 49 to 59, high desert: 58 to 63, low desert: 69 to 73.

Slightly above average temperatures for the coasts and valleys. Near average temperatures for the mountains and deserts. For the coastal areas: 65 to 72, western valleys and inland Orange County: 69 to 74, inland valleys: 67 to 73, mountains between 4000 ft and 7000 ft: 49 to 58, high desert: 59 to 62, low desert: 64 to 68. or more rainfall/liquid-equivalent are mostly at least 65 percent with chances in the mountains for one inch more of rainfall/liquid-equivalent around 35 percent.