San Diego County Inland Valleys Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Fire Weather Warning
Issued: 2:10 AM PDT Oct. 23, 2019 – National Weather Service

... Red flag warning remains in effect from 5 am Thursday to 5 PM
PDT Friday for strong gusty winds and low humidity for
mountains... valleys... and inland Orange County...

* 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.

Precautionary/preparedness actions...

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.



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