- ...Hot...dry and breezy with high fire danger across southwest California through Sunday... An upper level ridge of high pressure will continue to build over the region..bringing a significant warming and drying trend to southwest California that will persist through the weekend. Santa Ana winds will continue over the Los Angeles and Ventura County mountains and valleys today...with lighter winds expected Friday. Afternoon high temperatures will rise into the 80s to mid 90s across the coast and valleys today...and to around 90 to the lower 100s by Friday. The heat is expected to peak on Saturday with valley highs ranging between 100 to 106 degrees. Overnight lows are expected to remain rather warm...in the mid 60s to near 70 across the elevated wind-prone valleys and Lower Mountain elevations. Santa Ana winds will peak this morning with northeast gusts up to 30 mph in the valleys and locally up to 45 mph in the mountains. A drying air mass is expected across all of southwest California with relative humidities falling into the single digits away from the beaches through Sunday. The combination of rising temperatures...low humidity and offshore winds in combination with critically dry vegetation will bring a high fire danger to much of southwest California through this weekend. The highest fire danger is expected today across the Los Angeles and Ventura County mountains and valleys where the strongest northeast winds are likely to occur (see laxrfwlox for details).