San Bernardino County, California
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Watch/Warnings
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The National Weather Service's Watches, Warnings and Advisories by state counties include: Thunderstorm, Tornado, Flood, Flash Flood, Winter Storm, High Wind, Gale, Small Aircraft, High Surf, Marine, Heat, Air Quality, Ashfall, Hazardous, and Special Statements.
Weather Alerts: San Bernardino County, California
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Excessive Heat Watch
CAZ043-048-050-552-554-210430-
/O.CON.KSGX.EH.A.0005.171023T1700Z-171025T0300Z/
San Diego County Coastal Areas-
San Bernardino and Riverside County Valleys-The Inland Empire-
San Diego County Valleys-Orange County Coastal Areas-
Orange County Inland Areas-
Including the cities of Vista, Carlsbad, Encinitas, Chula Vista,
National City, San Diego, Riverside, San Bernardino, Ontario,
Moreno Valley, Fontana, Rancho Cucamonga, Corona, Escondido,
El Cajon, San Marcos, La Mesa, Santee, Poway, Huntington Beach,
Costa Mesa, Santa Ana, Anaheim, Garden Grove, Irvine, Orange,
Fullerton, and Mission Viejo
103 PM PDT Fri Oct 20 2017

...EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM MONDAY MORNING
THROUGH TUESDAY EVENING...

* TEMPERATURE...Daytime highs between 98 and 106. Nighttime lows
in windy areas will remain in the 70s.

* IMPACTS...Heat related illness is likely for those involved in
strenuous outdoor activity, or those with health conditions
that do not have adequate access to air conditioning. If
untreated, heat illness events could be fatal. Never leave
children or pets inside a parked car!

* OUTLOOK...Gradual cooling will likely occur Wednesday and
Thursday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

An Excessive Heat Watch means that a prolonged period of very
high temperatures is expected. The very hot weather will create a
dangerous situation in which heat illnesses are possible. Drink
plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

&&

$$
Fire Weather Warning
CAZ248-255-257-210545-
/O.CON.KSGX.FW.W.0004.171021T1700Z-171025T0100Z/
San Bernardino and Riverside County Valleys - The Inland Empire-
San Bernardino County Mountains-
Including The Mountain Top And Front Country Ranger Districts Of
The San Bernardino National Forest-Santa Ana Mountains-
Including The Trabuco Ranger District of the Cleveland National
Forest-
231 PM PDT Fri Oct 20 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM SATURDAY TO 6 PM
PDT TUESDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY...

* WIND...Areas of northeast winds 15 to 25 MPH with gusts 35 to
45 MPH, strongest Monday and Tuesday mornings.

* HUMIDITY...Daytime minimums around 10 percent Saturday and
Sunday, then 5 to 10 percent Monday and Tuesday. Poor
recovery each night, especially in windy areas.

* TIMING...Saturday morning through Tuesday.

* OUTLOOK...Winds should weaken Wednesday with some improvement
in humidity.

* IMPACTS...Any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. A combination of strong winds, low
relative humidity and hot weather can contribute to extreme fire
behavior. Listen for later forecasts and possible Red Flag
Warnings.

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.

&&

$$

Fire Weather Warning
AZZ101-CAZ229-NVZ466-211200-
/O.NEW.KVEF.FW.W.0019.171021T1900Z-171022T0100Z/
Lake Mead NRA/Colorado River-AZ side-Lower Colorado River Valley-
Lake Mead NRA/Colorado River-NV side-
308 PM PDT Fri Oct 20 2017 /308 PM MST Fri Oct 20 2017/

...RED FLAG WARNING IN EFFECT FROM NOON PDT /NOON MST/ TO 6 PM
PDT /6 PM MST/ SATURDAY FOR STRONG WINDS AND LOW RH FOR FIRE
WEATHER ZONES 101, 229, AND 466...

The National Weather Service in Las Vegas has issued a Red Flag
Warning, which is in effect from noon PDT /noon MST/ to 6 PM PDT
/6 PM MST/ Saturday.

* AFFECTED AREA...In Arizona...Fire weather zone 101. In
California...Fire weather zone 229. In Nevada...Fire weather
zone 466.

* TIMING...Winds will increase overnight out of the north and
continue through much of Saturday before decreasing late.

* WIND...North 15 to 25 mph with gusts to 35 mph.

* HUMIDITY...Minimum values 5 to 10 percent from late morning
through late afternoon Saturday.

* IMPACTS...Any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.

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.

&&

$$

Lake Wind Advisory
AZZ002-036-CAZ527-NVZ021-210300-
/O.CON.KVEF.LW.Y.0009.171021T0300Z-171022T0100Z/
Lake Havasu and Fort Mohave-Lake Mead National Recreation Area-
San Bernardino County-Upper Colorado River Valley-
Including Lake Havasu City, Desert Hills, Topock,
Bullhead City, Oatman, Mohave Valley, Needles, Hoover Dam,
and Laughlin
238 PM PDT Fri Oct 20 2017 /238 PM MST Fri Oct 20 2017/

...LAKE WIND ADVISORY REMAINS IN EFFECT FROM 8 PM PDT /8 PM MST/
THIS EVENING TO 6 PM PDT /6 PM MST/ SATURDAY...

* TIMING...Winds will increase behind a cold front overnight,
peak Saturday morning, then decrease late Saturday afternoon.

* WINDS...North winds 20 to 30 mph, gusting 30 to 40 mph.

* IMPACTS...Gusty winds will create rough water conditions on
Lake Mead, Lake Mohave, and Lake Havasu. Waves could swamp
small craft. Areas of low visibility due to blowing dust will
be possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Lake Wind Advisory indicates that winds will cause rough chop
on area lakes. Small boats will be especially prone to capsizing.

&&

$$
Wind Advisory
CAZ055-056-058-060-062-065-210400-
/O.CON.KSGX.WI.Y.0030.000000T0000Z-171021T0400Z/
San Bernardino County Mountains-Riverside County Mountains-
San Diego County Mountains-Apple and Lucerne Valleys-
San Diego County Deserts-San Gorgonio Pass Near Banning-
Including the cities of Crestline, Lake Arrowhead, Big Bear City,
Big Bear Lake, Running Springs, Wrightwood, Idyllwild-Pine Cove,
Julian, Pine Valley, Victorville, Hesperia, Apple Valley,
Borrego Springs, Banning, and Desert Hot Springs
103 PM PDT Fri Oct 20 2017

...WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING...

* WINDS...West winds 25 to 35 mph with gusts 45 to 55 mph.

* TIMING...Through this evening.

* LOCATION...Mainly in the high desert, through the San Gorgonio
Pass, along the ridges and desert slopes of the mountains, and
locally into the San Diego County Deserts.

* VISIBILITY...Visibility locally reduced in blowing dust and
sand.

* IMPACTS...Hazardous travel for high profile vehicles. Small
tree limbs may be broken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that winds of 35 mph are expected. Winds
this strong can make driving difficult...especially for high
profile vehicles. Use extra caution.

&&

$$

Wind Advisory
AZZ001-003-CAZ523>525-210300-
/O.CON.KVEF.WI.Y.0043.000000T0000Z-171021T0300Z/
Northwest Plateau-Northwest Deserts-Western Mojave Desert-
Eastern Mojave Desert-Morongo Basin-
Including Colorado City,
Pipe Spring National Monument, Tuweep, Mt Trumbell,
Western Grand Canyon, Kingman, Golden Valley, Dolan Springs,
Valentine, Wikieup, Yucca, Barstow, Daggett, Fort Irwin, Baker,
Mountain Pass, Mitchell Caverns, Morongo Valley, Yucca Valley,
and Twentynine Palms
238 PM PDT Fri Oct 20 2017 /238 PM MST Fri Oct 20 2017/

...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT /8 PM MST/ THIS
EVENING...

* TIMING...Winds will be strongest this afternoon and then
decrease after sunset.

* WINDS...West to southwest winds 25 to 35 mph with gusts 35 to
45 mph. Higher gusts of 45-55 mph will be likely across the
Western Mojave Desert, including Barstow, Daggett, and Fort
Irwin.

* IMPACTS...Strong crosswinds could make travel hazardous on
north south roadways, including Interstate 15. Visibility
could also be reduced in areas due to blowing dust,
particularly near the Mojave River.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means strong winds gusting over 40 mph can make
driving difficult...especially for high profile vehicles. Use
extra caution.

&&

$$

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