Red Flag Warning issued December 16 at 12:00PM PST until December 17 at 8:00PM PST by NWS SanDiego
Orange County Coastal; Orange County Inland; Riverside County Mountains-Including The San Jacinto Ranger District Of The San Bernardino National Forest; San Bernardino County Mountains-Including The Mountain Top And Front Country Ranger Districts Of The San Bernardino National Forest; San Bernardino and Riverside County Valleys - The Inland Empire; San Gorgonio Pass Near Banning; Santa Ana Mountains-Including The Trabuco Ranger District of the Cleveland National Forest
...RED FLAG WARNING IN EFFECT FOR PORTIONS OF SAN BERNARDINO...
RIVERSIDE AND ORANGE COUNTIES FROM 8 AM TO 8 PM PST SUNDAY...
.Surface high pressure over the Great Basin will bring a period
of offshore flow for late tonight into Monday. Gusty north to
northeast winds will strengthen for late tonight across portions
of San Bernardino...Riverside...and Orange Counties and spread
southward into San Diego County on Sunday. The strongest winds are
expected across portions of San Bernardino...Riverside...and
Orange Counties for late tonight through Sunday morning with
lowest humidities for late Sunday morning through Sunday
...RED FLAG WARNING REMAINS IN EFFECT FROM 8 AM TO 8 PM PST
SUNDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE MOUNTAINS
OF RIVERSIDE, SAN BERNARDINO, AND ORANGE COUNTIES, THE ORANGE
COUNTY COASTAL PLAIN, AND INLAND EMPIRE...
* WIND...Areas of north to northeast winds 20 to 30 mph with gusts
to 50 mph late tonight through Sunday morning...decreasing
Sunday afternoon and evening. Isolated gusts to 60 mph.
* LOCATION...Strongest winds and lowest humidity along the
coastal mountain slopes and below passes and canyons.
* HUMIDITY...Lowest 10 to 15 percent.
* TIMING...Strongest winds from late Saturday night through Sunday
morning with lowest humidity late Sunday morning through Sunday
* OUTLOOK...Winds will weaken Sunday night and Monday.
* FIRE WEATHER IMPACTS...Any fires that develop will likely
spread rapidly and be difficult to contain. Outdoor burning
should be avoided.
* WIND IMPACTS...Hazardous driving conditions for high profile
vehicles. Blowing dust may locally reduce visibility below
one mile at times. Debris on roadways and falling tree
branches are possible.
A Red Flag Warning means that critical fire weather conditions
are either occurring now....or will shortly. A combination of
strong winds...low relative humidity...and heat can contribute to
extreme fire behavior.