Weak to moderate Santa Ana winds will continue through Friday, with the strongest winds expected tonight into Thursday. Conditions will gradually warm Thursday through the middle of next week. High clouds will occur intermittently through the next week with low clouds unlikely.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
This evening, variable high clouds are moving from north to south over the region but satellite imagery shows no low clouds. Sfc pressure gradients continue to trend offshore and are -5.0 mb SAN- TPH. In the last hour, the windy locations have reported northeast to east winds gusting 25 to 45 mph.
From previous discussion, A surface high developing over the Great Basin, has turned the pressure gradient offshore and brought periods of Santa Ana winds to the foothills and coastal mountain slopes. Gusty winds out of the northeast to east will become more widespread tonight into Thursday morning. Along and below the coastal slopes of the mountains and through passes peak gusts of 40 to 50 mph, locally up to 55 mph are expected. Northeast to east winds will continue into Friday morning, but with decreasing coverage and strength. Gusts on Friday are expected to peak at about 35 mph. Lowest daytime humidity on Thursday and Friday for the valleys and inland coastal areas will fall to 15 to 25 percent.
Overnight temperatures tonight will fall into the 30s in wind sheltered valley locations and in the High Desert. Daytime high temperatures will gradually warm Thursday through the middle of next week. Highs Tuesday and Wednesday will be 10 to 18 degrees above average for inland areas. Persistent weak offshore flow into next week will keep low clouds mostly absent from the coast. Periods of high clouds will occur at times.
040400z. Coasts/Valleys/Mountains, VFR conditions expected through Thursday evening. Elevated east to northeast winds currently gusting 25-35 kts through mountain passes, along coastal slopes and through adjacent foothills, locally into the valleys (including vcty KONT). Winds locally gusting to 40 kts through mountain passes. Areas of LLWS and MOD up/downdrafts are expected downwind of the mountains. Winds will remain elevated in these areas through 18Z before slowly weakening and becoming confined to mountain slopes and passes.
Deserts, VFR conditions through Thursday evening with a FEW to SCT high clouds around 20000-25000 ft MSL.
No hazardous marine conditions are expected today through Sunday.
Very high tides will occur Thursday and Friday mornings, threatening coastal flooding, minor tidal overflow and beach erosion. Chances of these impacts are highest Thursday morning as elevated surf up to 5-6 feet will combine with the high tides, mostly in San Diego County. Check the Coastal Hazard Message for details.
Ca, Beach Hazards Statement through Friday morning for Orange County Coastal Areas-San Diego County Coastal Areas.
PZ, None.
