Weather Alerts for San Bernardino and Riverside County Valleys -The Inland Empire

Issued by the National Weather Service

Red Flag Warning  RED FLAG WARNING   Red Flag Warning
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS -THE INLAND EMPIRE

Areas Affected:
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
Effective: Thu, 12/14 4:00am Updated: Wed, 12/13 4:15pm Urgency: Expected
Expires: Fri, 12/15 10:00am Severity:  Severe  Certainty: Likely

 
Details:
...RED FLAG WARNING REMAINS IN EFFECT FROM 4 AM THURSDAY TO 10 AM
PST FRIDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY...
* WIND...Northeast to east winds 20 to 30 mph with gusts to 50
mph. Isolated gusts to 65 mph.
* HUMIDITY...Minimum relative humidity 5 to 8 percent with very
poor overnight recovery.
* TIMING...Winds increasing Thursday morning, and peaking in
the afternoon. Winds gradually becoming less widespread
Thursday evening and decreasing Friday morning.
* OUTLOOK...Another period of critical fire weather conditions
could occur Sunday into early Monday due to another increase
in Santa Ana winds and low humidity.
* 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. Specific freeways that may be impacted include
interstates 10, 215, 15 and 8. Blowing dust or sand may locally
reduce visibility to 1 mile. Debris on roadways and falling tree
branches possible.

Information:
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.