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Excessive Heat Watch


URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
558 AM PDT Wed Aug 12 2020

CAZ036>038-041-044>046-051>054-059-088-547-548-122300-
/O.CON.KLOX.EH.A.0003.200814T1800Z-200818T0500Z/
Santa Ynez Valley-San Luis Obispo County Interior Valleys-
Cuyama Valley-
Los Angeles County Coast including Downtown Los Angeles-
Ventura County Interior Valleys-Ventura County Coastal Valleys-
Santa Monica Mountains Recreational Area-
San Luis Obispo County Mountains-Santa Barbara County Mountains-
Ventura County Mountains-
Los Angeles County Mountains excluding the Santa Monica Range-
Antelope Valley-Santa Clarita Valley-
Los Angeles County San Fernando Valley-
Los Angeles County San Gabriel Valley-
Including the cities of Solvang, Santa Ynez, Paso Robles,
Atascadero, Cuyama, Malibu, Santa Monica, Beverly Hills,
Hollywood, Long Beach, Santa Paula, Fillmore, Ojai, Piru,
Thousand Oaks, Simi Valley, Moorpark, Newbury Park,
Black Mountain, San Marcos Pass, San Rafael Wilderness Area,
Dick Smith Wilderness Area, Lockwood Valley, Mount Pinos, Acton,
Mount Wilson, Sandberg, Lancaster, Palmdale, Santa Clarita,
Newhall, Valencia, Woodland Hills, Northridge, Burbank,
Universal City, Pasadena, San Gabriel, and Pomona
558 AM PDT Wed Aug 12 2020

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

* WHAT...Dangerously hot conditions with high temperatures
  between 95 and 108. The hottest locations will be in the far
  interior sections and the Los Angeles County valleys.

* WHERE...All of southwest California, except for the coastal
  area in Ventura, Santa Barbara, and San Luis Obispo Counties.

* WHEN...From Friday morning through Monday evening.

* IMPACTS...Extreme heat will significantly increase the
  potential for heat related illnesses, particularly for those
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...Overnight low temperatures will be very
  warm with temperatures only cooling into the 70s and even
  lower 80s, warmest in foothill locations.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts and warnings for updates on this
situation. Be prepared to drink plenty of fluids, stay in an air-
conditioned room, stay out of the sun, and check up on relatives
and neighbors. Take extra precautions if you work or spend time
outside.

Young children and pets should never be left unattended in
vehicles under any circumstances. This is especially true during
warm or hot weather when car interiors can reach lethal
temperatures in a matter of minutes.

$$

CK

URGENT - WEATHER MESSAGE
National Weather Service Hanford CA
456 AM PDT Wed Aug 12 2020

CAZ179>191-198-199-122000-
/O.CON.KHNX.EH.A.0004.200815T2000Z-200817T0400Z/
West Side Hills-San Joaquin Confluence-Merced and Madera-
Western San Joaquin Valley-Foggy Bottom-Fresno-Tulare County-
Southern Kings County-Western San Joaquin Valley in Kern County-
Eastern San Joaquin Valley in Kern County-Bakersfield-
Central Sierra Foothills-Southern Sierra Foothills-
Indian Wells Valley-Kern County Desert-
Including the cities of Avenal, Coalinga, San Luis Reservoir,
Los Banos, Mendota, Merced, Madera, Atwater, Lemoore Station,
Five Points, Kettleman City, Hanford, Lemoore, Corcoran, Fresno,
Goshen, Visalia, Tulare, Porterville, Alpaugh, Wasco, Shafter,
Delano, Bakersfield, Coarsegold, Oakhurst, Squaw Valley, Auberry,
North Fork, Mariposa, Springville, Three Rivers, Inyokern,
Ridgecrest, Rosamond, California City, Randsburg, Edwards AFB,
and Mojave
456 AM PDT Wed Aug 12 2020

...EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON
THROUGH SUNDAY EVENING...

* WHAT...Dangerously hot conditions with temperatures of 102 to
  110 expected. Overnight lows 70 to 80.

* WHERE...San Joaquin Valley and adjacent lower foothills
  including the West Side Hills; Kern County Desert.

* WHEN...From Saturday afternoon through Sunday evening.

* IMPACTS...Extreme heat and humidity will significantly
  increase the potential for heat related illnesses,
  particularly for those working or participating in outdoor
  activities.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts and warnings for updates on this
situation. Be prepared to drink plenty of fluids, stay in an air-
conditioned room, stay out of the sun, and check up on relatives
and neighbors.

Young children and pets should never be left unattended in
vehicles under any circumstances. This is especially true during
warm or hot weather when car interiors can reach lethal
temperatures in a matter of minutes.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
320 AM PDT Wed Aug 12 2020

AZZ002-003-036-CAZ522>527-NVZ016-017-020>022-122200-
/O.CON.KVEF.EH.A.0007.200814T1800Z-200818T0400Z/
Lake Havasu and Fort Mohave-Northwest Deserts-
Lake Mead National Recreation Area-Death Valley National Park-
Western Mojave Desert-Eastern Mojave Desert-Morongo Basin-
Cadiz Basin-San Bernardino County-Upper Colorado River Valley-
Northeast Clark County-Western Clark and Southern Nye County-
Las Vegas Valley-Southern Clark County-
Including Lake Havasu City, Desert Hills, Topock, Kingman,
Golden Valley, Dolan Springs, Valentine, Wikieup, Yucca,
Bullhead City, Oatman, Mohave Valley, Furnace Creek,
Stovepipe Wells, Shoshone, Barstow, Daggett, Fort Irwin, Baker,
Mountain Pass, Mitchell Caverns, Morongo Valley, Yucca Valley,
Twentynine Palms, Vidal Junction, Needles, Mesquite, Overton,
Moapa, Pahrump, Indian Springs, Desert Rock, Amargosa Valley,
Las Vegas, North Las Vegas, Henderson, Boulder City, Hoover Dam,
Laughlin, Primm, Searchlight, and Cal-Nev-Ari
320 AM PDT Wed Aug 12 2020 /320 AM MST Wed Aug 12 2020/

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

* WHAT...Dangerously hot conditions with temperatures of 110 to
  120 expected.

* WHERE...Portions of northwest Arizona, southeast California
  and southern Nevada.

* WHEN...From Friday morning through Monday evening.

* IMPACTS...Extreme heat will significantly increase the potential
  for heat related illnesses, particularly for those working or
  participating in outdoor activities.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared to drink plenty of fluids, stay in an air-conditioned
room, stay out of the sun, and check up on relatives and
neighbors.

Young children and pets should never be left unattended in
vehicles under any circumstances. This is especially true during
hot weather when car interiors can reach lethal temperatures in a
matter of minutes.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/lasvegas

URGENT - WEATHER MESSAGE
National Weather Service San Francisco Bay Area
232 AM PDT Wed Aug 12 2020

CAZ510-511-516>518-122100-
/O.NEW.KMTR.EH.A.0002.200814T1900Z-200817T0300Z/
East Bay Interior Valleys-East Bay Hills and the Diablo Range-
Southern Salinas Valley/Arroyo Seco and Lake San Antonio-
Santa Lucia Mountains and Los Padres National Forest-
Mountains Of San Benito County And Interior Monterey County
Including Pinnacles National Park-
Including the cities of Concord, Antioch, Livermore,
Walnut Creek, Pleasanton, Pittsburg, San Ramon, Blackhawk,
Greenfield, and King City
232 AM PDT Wed Aug 12 2020

...EXCESSIVE HEAT WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH
SUNDAY EVENING...

* WHAT...Well above normal temperatures with afternoon highs in
  the mid 90s to 108.

* WHERE...East Bay Interior Valleys, East Bay Hills and the
  Diablo Range, Southern Salinas Valley/Arroyo Seco and Lake San
  Antonio, Santa Lucia Mountains and Los Padres National Forest
  and Mountains Of San Benito County and Interior Monterey
  County Including Pinnacles National Park.

* WHEN...From Friday afternoon through Sunday evening.

* IMPACTS...Heat related illnesses such as heat exhaustion and
  heat stroke can occur due to prolonged exposure to hot
  temperatures. People most vulnerable include those who are
  spending a significant amount of time outdoors, those without
  air conditioning, young children, the elderly, and those with
  chronic ailments. Additional societal impacts due to people
  seeking relief by traveling from hotter inland areas to cooler
  coastal areas.

* ADDITIONAL DETAILS...Daytime temperatures for inland areas are
  forecast to range from the mid 90s to 108 Friday through Sunday.
  The peak of the heat will likely occur Saturday and Sunday. The
  San Francisco Bay shoreline and Santa Cruz County coast could
  warm to the mid 80s and lower 90s on Saturday and Sunday. For
  San Francisco itself, the Downtown/Bayside could warm to the
  lower 80s while the Pacific coastal side will peak in the upper
  60s and lower 70s. Other coastal areas should remain relatively
  mild (70s to around 80) compared to inland areas given light
  onshore flow. Significant temperature differences from the coast
  to a few miles inland could drive an excessive number of
  persons towards the coast to seek relief from the heat.
  Individuals are advised to check with local authorities on
  potential closures of parks and beaches and be aware of any
  special requirements for visiting such areas. Overnight lows
  will range from the upper 50s to mid 60s, and even 70s in the
  hills, which may limit the amount of typical overnight relief
  from the heat.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts and warnings for updates on this
situation. Be prepared to drink plenty of fluids, stay in an air-
conditioned room, stay out of the sun, and check up on relatives
and neighbors.

Take extra precautions 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 lightweight and loose fitting clothing when
possible. 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 9 1 1.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/mtr

URGENT - WEATHER MESSAGE
National Weather Service SAN DIEGO CA
217 AM PDT Wed Aug 12 2020

CAZ048-050-055>058-060>062-065-554-122300-
/O.CON.KSGX.EH.A.0007.200814T1900Z-200818T0400Z/
San Bernardino and Riverside County Valleys-The Inland Empire-
San Diego County Valleys-San Bernardino County Mountains-
Riverside County Mountains-Santa Ana Mountains and Foothills-
San Diego County Mountains-Apple and Lucerne Valleys-
Coachella Valley-San Diego County Deserts-
San Gorgonio Pass Near Banning-Orange County Inland Areas-
Including the cities of Riverside, San Bernardino, Ontario,
Moreno Valley, Fontana, Rancho Cucamonga, Corona, Escondido,
El Cajon, San Marcos, La Mesa, Santee, Poway, Crestline, Julian,
Pine Valley, Victorville, Hesperia, Apple Valley, Indio,
Palm Springs, Cathedral City, Palm Desert, Palm Desert Country,
La Quinta, Coachella, Borrego Springs, Banning,
Desert Hot Springs, Santa Ana, Anaheim, Garden Grove, Orange,
Fullerton, and Mission Viejo
217 AM PDT Wed Aug 12 2020

...EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH MONDAY EVENING...

* WHAT...Dangerously hot conditions with temperatures from 98 to
  118 possible. Hottest in the deserts and Inland Empire.

* WHERE...Deserts, valleys, mountains below 5000 feet, and inland
  Orange County.

* WHEN...Friday through Monday.

* IMPACTS...Extreme heat will significantly increase the
  potential for heat related illnesses, particularly for those
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...High temperatures expected...
  Inland Empire..............100 to 108
  Inland Orange County........95 to 100
  High Deserts...............102 to 112
  San Diego County Valleys....95 to 104
  Mountains below 5000 feet...92 to 102
  Lower Deserts..............114 to 118

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts and warnings for updates on this
situation. Be prepared to drink plenty of fluids, stay in an air-
conditioned room, stay out of the sun, and check up on relatives
and neighbors.

Young children and pets should never be left unattended in
vehicles under any circumstances. This is especially true during
warm or hot weather when car interiors can reach lethal
temperatures in a matter of minutes.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/sandiego

17


Marine Weather Statement


Marine Weather Statement
National Weather Service Los Angeles/Oxnard CA
842 AM PDT Wed Aug 12 2020

PZZ645-650-655-670-673-676-122000-
Point Piedras Blancas to Point Sal westward out to 10 NM-
East Santa Barbara Channel from Pt. Conception to Pt. Mugu CA
including Santa Cruz Island-
Inner waters from Point Mugu to San Mateo Pt. CA including Santa
Catalina and Anacapa Islands-
Point Piedras Blancas to Point Sal from 10 to 60 NM-
Waters from Pt. Sal to Santa Cruz Island CA and westward 60 nm
including San Miguel and Santa Rosa Islands-
Outer waters from Santa Cruz Island to San Clemente Island to
60 NM offshore including San Nicolas and Santa Barbara Islands-
842 AM PDT Wed Aug 12 2020

...PATCHY DENSE FOG WILL IMPACT THE COASTAL WATERS THIS
MORNING...

Patchy dense fog, with visibility of one nautical mile or less,
will impact portions of the coastal waters this morning. The
visibility is less than one half mile in some locations.

Mariners should be prepared for abrupt visibility changes down to
one nautical mile or less. Reduce speeds and be on the lookout
for exposed rocks and other vessels, including large ships in the
shipping lanes.

Use radar or GPS navigation if available, and consider remaining
in harbor if such equipment is unavailable. Always check
conditions prior to leaving safe harbor.

$$

Sweet

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: June 2, 2009
NATIONAL WEATHER SERVICE: for Safety, for Work, for Fun - FOR LIFE