The county will see Santa Ana conditions with areas of strong and gusty easterly winds through Wednesday along and west of the mountains,” the NWS said, adding local wind gusts will exceed 65 miles per hour and high temperatures will exceed 100 degrees at times.
Daytime humidity is expected to be around 5 percent.
The weather service also issued a high wind warning for valley and mountain areas, and a less serious wind advisory for coastal areas, each from 6 a.m. today to Wednesday afternoon.
In the valleys, sustained northeast to east winds of 25 to 35 mph and gusts up to 65 mph are expected. Even stronger winds are expected in the mountains, with sustained northeast winds of 30 to 40 mph and gusts to 65 mph expected. Isolated gusts of 75 mph are also possible in the mountains, according to the NWS.
Sustained northeast to east winds of 20 to 30 mph and gusts to 45 mph are expected in coastal areas.
“The winds will make driving difficult, especially for motorists with high profile vehicles,” the NWS said. “Watch for broken tree limbs and other debris on roadways.”
The NWS also issued a heat advisory for coastal and valley areas from 9 a.m. today to 6 p.m. Thursday, saying daytime highs will be around 90 degrees at the beaches and 92 to 98 degrees in inland coastal areas and the mesas. Even warmer temperatures are expected as the week continues before a cooling trend hits Friday.
“Take extra precautions if you work or spend time outside,” the NWS said. “When possible, reschedule strenuous activities to early morning or evening.”