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  • Alpine Chamber

Red Flag Warning Issued for San Diego County



From the National Weather Service

* WIND...Areas of northeast winds 25 to 35 mph with gusts to 50 
mph developing late tonight and continuing through Thursday 
with strongest gusts to 60 mph below the Cajon and Banning 
Passes, near the coastal slopes of the Santa Ana Mountains, and 
near the ridge tops of the San Diego County Mountains. Wind 
becoming east to northeast late Thursday night into Friday with 
the stronger and more widespread winds below the Banning Pass 
and in the San Diego County mountains and valleys. 
 
* HUMIDITY...Lowest daytime humidity of 5 to 10 percent with 
poor overnight recovery. 
 
* TIMING...Winds will develop late tonight, then strengthen and 
become more widespread Thursday morning with the humidity 
decreasing to 5 to 10 percent by early afternoon. Wind 
becoming east to northeast late Thursday night into Friday with 
the stronger and more widespread winds below the Banning Pass 
and in the San Diego County mountains and valleys. 
 
* OUTLOOK...Very low humidity will continue into Saturday, but 
with weaker and less widespread winds. There will be greater 
humidity recovery Sunday as onshore flow strengthens and 
spreads cooling inland. 
 
* IMPACTS...If fire ignition occurs, conditions will be favorable 
for extreme fire behavior and rapid growth which would threaten 
life and property.

Instructions: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 warm temperatures can contribute to extreme fire behavior. Use extreme caution with potential fire ignition sources.


Target Area: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 Diego County Inland Valleys San Diego County Mountains-Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest San Gorgonio Pass Near Banning Santa Ana Mountains-Including The Trabuco Ranger District of the Cleveland National Forest