San Bernardino County, California
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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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Freeze Warning
CAZ048-192230-
/O.CON.KSGX.FZ.W.0001.180220T0600Z-180220T1700Z/
/O.CON.KSGX.FR.Y.0003.180221T0600Z-180221T1600Z/
San Bernardino and Riverside County Valleys-The Inland Empire-
Including the cities of Riverside, San Bernardino, Ontario,
Moreno Valley, Fontana, Rancho Cucamonga, and Corona
308 AM PST Mon Feb 19 2018

...FREEZE WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO
9 AM PST TUESDAY...
...FROST ADVISORY REMAINS IN EFFECT FROM 10 PM TUESDAY TO 8 AM
PST WEDNESDAY...

* Temperature...Falling into the upper 20s to mid 30s tonight into
Tuesday morning...and into the 30s tonight into Wednesday
morning.

* Duration...Several hours of temperatures sufficient for frost
each night with 4 to 6 hours of near or below freezing
conditions.

* Location...Coldest temperatures in low-lying, wind-sheltered
areas...especially in southern and eastern portions of the
Inland Empire.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

&&

$$

Frost Advisory
CAZ048-192230-
/O.CON.KSGX.FZ.W.0001.180220T0600Z-180220T1700Z/
/O.CON.KSGX.FR.Y.0003.180221T0600Z-180221T1600Z/
San Bernardino and Riverside County Valleys-The Inland Empire-
Including the cities of Riverside, San Bernardino, Ontario,
Moreno Valley, Fontana, Rancho Cucamonga, and Corona
308 AM PST Mon Feb 19 2018

...FREEZE WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO
9 AM PST TUESDAY...
...FROST ADVISORY REMAINS IN EFFECT FROM 10 PM TUESDAY TO 8 AM
PST WEDNESDAY...

* Temperature...Falling into the upper 20s to mid 30s tonight into
Tuesday morning...and into the 30s tonight into Wednesday
morning.

* Duration...Several hours of temperatures sufficient for frost
each night with 4 to 6 hours of near or below freezing
conditions.

* Location...Coldest temperatures in low-lying, wind-sheltered
areas...especially in southern and eastern portions of the
Inland Empire.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

&&

$$

High Wind Warning
CAZ060-192230-
/O.CON.KSGX.HW.W.0003.000000T0000Z-180220T0200Z/
Apple and Lucerne Valleys-
Including the cities of Victorville, Hesperia, and Apple Valley
308 AM PST Mon Feb 19 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM PST THIS
EVENING...

* Winds...Southwest to west winds 20 to 30 mph with occasional
gusts to 65 mph.

* Timing/Location...Strongest winds overnight near the foothills
through early this morning.

* Impacts...Strong winds will make travel difficult for high-
profile vehicles. Blowing dust and sand may reduce visibility
to near-zero in a few locations

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

High Wind Warning
CAZ523-192000-
/O.CON.KVEF.HW.W.0002.000000T0000Z-180220T0000Z/
Western Mojave Desert-
Including Barstow, Daggett, and Fort Irwin
351 AM PST Mon Feb 19 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON...

* TIMING...Strong winds will continue this morning, then decrease
this afternoon.

* WINDS...Southwest 30 to 40 MPH with gusts 45 to 55 MPH. Areas of
gusts in excess of 60 MPH possible.

* IMPACTS...Strong winds will create hazardous driving
conditions due to gusty crosswinds and areas of blowing dust,
especially between Cajon Pass and Baker along Interstate 15,
near Barstow on Interstate 40, and on Highway 395 north of
Kramer Junction. High profile vehicles may be overturned due
to wind.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extreme caution if traveling across San Bernardino County.
Motorists should check road and weather conditions and
restrictions before traveling through the area. Be prepared for
sudden, strong crosswinds and areas of reduced visibility.

&&

$$

Wind Advisory
CAZ560-200400-
/O.CON.KPSR.WI.Y.0004.000000T0000Z-180220T0400Z/
Joshua Tree NP West-
Including the cities of Cottonwood Visitor and Lost Horse-Keys
Village
223 AM PST Mon Feb 19 2018

...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM PST THIS EVENING...

* AFFECTED AREA...Joshua Tree National Park.

* TIMING...Now through this evening.

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

* IMPACTS...Strong winds in Joshua Tree National Park will create
difficult and hazardous driving conditions, especially for high
profile vehicles. Areas of blowing dust may also lead to
sharply reduced visibilities.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that sustained wind speeds of between
30 and 40 mph are expected, or wind gusts of between 40 and
58 mph. Winds this strong can make driving difficult, especially
for high profile vehicles. In addition, strong winds over desert
areas could result in briefly lowered visibilities to well under
a mile at times in blowing dust or blowing sand. Use extra
caution.

&&

$$
Wind Advisory
CAZ524-525-NVZ022-192000-
/O.CON.KVEF.WI.Y.0006.000000T0000Z-180220T0000Z/
Eastern Mojave Desert-Morongo Basin-Southern Clark County-
Including Baker, Mountain Pass, Mitchell Caverns,
Morongo Valley, Yucca Valley, Twentynine Palms, Primm,
.Searchlight, and Cal-Nev-Ari
351 AM PST Mon Feb 19 2018

...WIND ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON...

* TIMING...Strong winds will continue this morning then decrease
this afternoon.

* WINDS...Southwest 25 to 35 MPH with gusts 35 to 45 MPH.
Isolated gusts to 55 MPH in the high terrain.

* IMPACTS...Strong winds will create hazardous driving
conditions due to gusty crosswinds and areas of blowing dust.
Temporary structures and fences may be damaged. Loose or
unsecured objects may be displaced.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Check road and weather conditions before traveling. Motorists,
and especially drivers of high-profile vehicles should be
prepared for strong crosswinds and areas of reduced visibility.

&&

$$

Winter Weather Advisory
CAZ055-056-058-192245-
/O.CON.KSGX.WW.Y.0002.000000T0000Z-180220T0600Z/
San Bernardino County Mountains-Riverside County Mountains-
San Diego County Mountains-
Including the cities of Crestline, Lake Arrowhead, Big Bear City,
Big Bear Lake, Running Springs, Wrightwood, Idyllwild-Pine Cove,
Julian, and Pine Valley
301 AM PST Mon Feb 19 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations of up to two inches
are expected. Areas of southwest to west winds 25 to 35 mph
with gusts to 55 mph. The strongest gusts will be near 75 mph
near mountain ridge tops and along desert mountain slopes. Snow
levels will be near 3500 feet.

* WHERE...Mountains of San Bernardino, Riverside, and San Diego
Counties.

* WHEN...Until 10 PM PST this evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions,
including during the evening commute. Damage to trees and
power lines is likely. Be prepared for reduced visibilities at
times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.

For road condition information in California...enter
8 0 0 4 2 7 7 6 2 3 if inside california or
9 1 6 4 5 5 7 6 2 3 if outside California.

&&

$$

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Providing "weather, water cycle, and climate forecasts and warnings for the United States, its territories, adjacent waters and ocean areas, for the protection of life and property and the enhancement of the national economy."
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