A high wind warning for the Coachella Valley has been issued for noon Wednesday Sept. 25 through 8 a.m. Thursday Sept. 26, with the strongest winds expected Wednesday evening.
"Onshore flow will continue to strengthen tonight . . . resulting in local 35 to 45 mph west wind gusts in the favored mountain passes and canyons," the National Weather Service advised in an update late Tuesday.
"A deepening trough of low pressure will move through the region Wednesday . . . resulting in stronger onshore flow," the Weather Service advised. "Westerly wind gusts of 55 mph . . . and isolated 65 mph gusts in the more wind-prone mountain and desert locations . . . are possible Wednesday afternoon into Thursday morning."
The strongest winds will occur Wednesday evening and winds are expected to weaken during the day Thursday, according to forecasters.
Areas in the high wind warning area include the Coachella Valley and the mountains of Riverside and San Bernardino counties on both sides of the San Gorgonio Pass.
There were two significant fires burning early Wednesday that remained a concern with the winds forecast: the 200-acre Sierra Fire near the base of the Cajon Pass in San Bernardino County, and the 250-acre Madre Fire near Azusa and the mouth of San Gabriel Canyon in Los Angeles County.