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Excessive Heat Warning

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
244 PM PDT Sat Oct 21 2017

...Excessive Heat Warning in effect for Los Angeles and Ventura
County coast and valleys Monday and Tuesday...
...Excessive Heat Watch for the Santa Barbara County south coast
Monday and Tuesday...

...Gusty northeast winds in many areas through Monday with
potentially strong winds across mountains Monday night and
Tuesday...

.A Santa Ana wind event is expected to bring northeast winds
across eastern Ventura and western Los Angeles Counties through
Sunday and across the central coast through Sunday night. A
stronger Santa Ana wind event could develop Monday night and
Tuesday as another surge of air from the Great Basin combines with
a tight pressure gradient over southwest California.

Strong high pressure in combination with the winds will produce
record setting high temperatures across southwest California. The
hottest days are expected to be Monday and Tuesday when highs
approach or exceed 100 degrees even within a mile of the ocean.
People living in coastal areas without air conditioning should
take precautions to avoid heat illness and heat stress. Low
temperatures will remain in the 70s and possibly lower 80s where
winds persist during the nighttime hours in Ventura and Los
Angeles Counties. This is a very unusual late season heat wave and
should not be taken lightly!

CAZ040-041-046-548-220600-
/O.UPG.KLOX.EH.A.0005.171023T1700Z-171025T0300Z/
/O.NEW.KLOX.EH.W.0006.171023T1700Z-171025T0300Z/
Ventura County Coast-
Los Angeles County Coast including Downtown Los Angeles-
Santa Monica Mountains Recreational Area-
Los Angeles County San Gabriel Valley-
Including the cities of Ventura, Oxnard, Camarillo, Malibu,
Santa Monica, Beverly Hills, Hollywood, Long Beach, Pasadena,
San Gabriel, and Pomona
244 PM PDT Sat Oct 21 2017

...EXCESSIVE HEAT WARNING IN EFFECT FROM 10 AM MONDAY TO 8 PM PDT
TUESDAY...

The National Weather Service in Los Angeles/Oxnard has issued an
Excessive Heat Warning, which is in effect from 10 AM Monday to
8 PM PDT Tuesday. The Excessive Heat Watch is no longer in
effect.

* TEMPERATURES...100-106 degrees on Monday and Tuesday. Overnight
  lows in the 70s. Isolated lower 80s possible in the foothills.

* Impacts...The very high temperatures create a dangerous
  situation in which heat illnesses are possible. Temperatures
  inside vehicles, even if the windows are partially open, can
  quickly rise to life-threatening levels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take extra precautions Monday through Tuesday if you work or
spend time outside. When possible, reschedule strenuous
activities to early morning or evening. Know the signs and
symptoms of heat exhaustion and heat stroke. Wear light weight
and loose fitting clothing when possible and drink plenty of
water.

Never, ever, leave people or pets in enclosed vehicles, even for
a short period of time.

To reduce risk during outdoor work the occupational safety and
health administration recommends scheduling frequent rest breaks
in shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency - call 911.

&&

$$



Beach Hazards Statement

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
1104 AM PDT SAT OCT 21 2017

CAZ040-041-220215-
/O.CON.KLOX.BH.S.0019.000000T0000Z-171023T0000Z/
VENTURA COUNTY COAST-
LOS ANGELES COUNTY COAST INCLUDING DOWNTOWN LOS ANGELES-
1104 AM PDT SAT OCT 21 2017

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH SUNDAY
AFTERNOON...

* HAZARDS...SURF HEIGHTS 4 TO 7 FEET WITH LOCAL SETS TO 8 FEET
  TODAY AND 3 TO 6 FEET WITH LOCAL SETS TO 7 FEET ON SUNDAY.
  THESE CONDITIONS ARE DUE TO A LONG PERIOD WEST NORTHWEST SWELL
  PEAKING ACROSS THE COASTAL WATERS TODAY.

* IMPACTS...THERE IS AN INCREASED RISK FOR OCEAN DROWNING. RIP
  CURRENTS CAN PULL SWIMMERS AND SURFERS OUT TO SEA. LARGE
  BREAKING WAVES CAN WASH PEOPLE OFF JETTIES, BEACHES AND
  ROCKS... AND CAPSIZE SMALL BOATS NEAR SHORE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BEACH HAZARDS STATEMENT IS ISSUED WHEN THREATS SUCH AS RIP
CURRENTS...LONGSHORE CURRENTS...SNEAKER WAVES AND OTHER HAZARDS
CREATE LIFE-THREATENING CONDITIONS IN THE SURF ZONE. SWIM NEAR A
LIFEGUARD. IF CAUGHT IN A RIP CURRENT, RELAX AND FLOAT. DON`T
SWIM AGAINST THE CURRENT. IF ABLE, SWIM IN A DIRECTION FOLLOWING
THE SHORELINE. IF UNABLE TO ESCAPE, FACE THE SHORE AND CALL OR
WAVE FOR HELP.

$$

SWEET




Red Flag Warning

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
1031 AM PDT Sat Oct 21 2017

...RED FLAG WARNING IN EFFECT UNTIL 10 AM PDT SUNDAY FOR THE SANTA BARBARA
COUNTY MOUNTAINS DUE TO GUSTY NORTH TO NORTHEAST WINDS AND LOW HUMIDITIES...

...RED FLAG WARNING IN EFFECT UNTIL 6 PM PDT TUESDAY FOR THE LOS ANGELES
AND VENTURA COUNTY MOUNTAINS AND SANTA CLARITA VALLEY DUE TO GUSTY
NORTHEAST WINDS AND LOW HUMIDITIES...

...RED FLAG WARNING IN EFFECT FROM 6 AM PDT SUNDAY UNTIL 6 PM PDT TUESDAY
FOR REMAINING COASTAL AND VALLEY AREAS OF LOS ANGELES AND VENTURA COUNTIES
DUE TO GUSTY NORTHEAST WINDS AND LOW HUMIDITIES...

.Gusty north to northeast winds will combine with lowering
humidities to bring critical fire weather conditions to the
mountains and Santa Clarita Valley today into tonight.

As the flow turns more northeast Sunday through Tuesday, there
will be a significant warming and drying trend across all of
Southwest California, with critical fire weather conditions likely
extending into the valley and coastal areas of Los Angeles and
Ventura counties. The most critical fire weather conditions are
expected Monday through Tuesday, when there will be a combination
of Santa Ana winds gusting to between 40 and 55 mph, record
breaking triple digit heat, humidities lowering into the single
digits, and very dry fuels. In addition, very warm and dry
conditions during the overnight hours in the mountains, foothills,
and wind prone areas will add to this fire weather threat during
this long duration of dangerous fire weather conditions. If fire
ignition occurs, there will be the potential for very rapid spread
of wildfire with long range spotting and extreme fire behavior
that could lead to a threat to life and property.

CAZ240-241-212315-
/O.UPG.KLOX.FW.A.0008.171022T1300Z-171025T0100Z/
/O.EXB.KLOX.FW.W.0008.171022T1300Z-171025T0100Z/
Ventura County Coast-
Los Angeles County Coast including Downtown Los Angeles-
1031 AM PDT Sat Oct 21 2017

...RED FLAG WARNING IN EFFECT FROM 6 AM SUNDAY TO 6 PM PDT TUESDAY
FOR GUSTY NORTHEAST WINDS AND LOW RELATIVE HUMIDITY FOR THE
VENTURA COUNTY COAST AND LOS ANGELES COUNTY COAST FROM MALIBU TO
HOLLYWOOD HILLS...

THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a
Red Flag Warning FOR GUSTY NORTHEAST WINDS AND LOW RELATIVE
HUMIDITY...WHICH IS IN EFFECT from Sunday morning through Tuesday
afternoon.

* Winds...Northeast winds 10 to 20 mph with gusts to 30 mph on
  Sunday from the Ventura County Coast extending eastward to
  Malibu and Hollywood Hills. Winds increasing to 15 to 30 mph
  with gusts to 40 mph Monday through Tuesday.

* Relative Humidity...Minimum values 8 to 18 percent Sunday,
  lowering to between 5 and 12 percent Monday through Tuesday.
  Very poor humidity recoveries expected each night in the
  foothills and wind prone areas.

* Temperatures...Max temperatures 84 to 94 degrees on Sunday,
  rising to between 95 and 103 degrees Monday into Tuesday. Very
  warm overnight low temperatures in the foothills and wind prone
  areas...remaining in the 70s in warmest locations.

* Impacts...If fire ignition occurs, there will be the potential
  for very rapid spread of wildfire with long range spotting and
  extreme fire behavior that could lead to a threat to life and
  property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are expected. A combination of gusty winds...very low relative
humidity...and warm temperatures can contribute to extreme fire
behavior. Use extreme caution when using potential fire ignition
sources.

&&

$$



U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007
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