Watches, Warnings & Advisories



2 products issued by NWS for: Mount Wilson CA

Extreme Heat Warning

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
507 AM PDT Mon Mar 16 2026

CAZ088-342-345-351>353-356>358-368>376-378>380-548-170015-
/O.CON.KLOX.XH.W.0001.260317T1700Z-260321T0300Z/
/O.CON.KLOX.HT.Y.0003.260316T1700Z-260317T1700Z/
Santa Clarita Valley-Santa Lucia Mountains-San Luis Obispo County
Mountains-Santa Ynez Mountains Western Range-Santa Ynez Mountains
Eastern Range-Santa Barbara County Interior Mountains-Lake
Casitas-Ojai Valley-Central Ventura County Valleys-Los Angeles
County Inland Coast including Downtown Los Angeles-Western Santa
Monica Mountains Recreational Area-Eastern Santa Monica Mountains
Recreational Area-Calabasas and Agoura Hills-Western San Fernando
Valley-Eastern San Fernando Valley-Southeastern Ventura County
Valleys-Santa Susana Mountains-Southern Ventura County Mountains-
Interstate 5 Corridor-Western San Gabriel Mountains and Highway
14 Corridor-Eastern San Gabriel Mountains-Los Angeles County San
Gabriel Valley-
Including the cities of Hearst Castle, Santa Margarita Lake,
Northridge, Santa Paula, Mount Baldy, Gorman, Ojai, Woodland
Hills, Universal City, Matilija, Pomona, Culver City, Malibu
Bowl, Mill Creek, Valencia, Oat Mountain, Acton, Santa Clarita,
Pasadena, San Marcos Pass, Moorpark, Figueroa Mountain, East Los
Angeles, Compton, Lake Castaic, Van Nuys, Newbury Park, La Canada
Flintridge, Topanga, Norwalk, Meiners Oaks, Caliente Range, Tejon
Pass, Thousand Oaks, Pyramid Lake, Warm Springs, Oak View,
Wrightwood, Glendale, Piru, Irish Hills, Chatsworth, Sunland,
Fillmore, Hollywood, The Angeles Crest Highway, San Gabriel,
Montecito Hills, Simi Valley, Big Pine Mountain, Rose Valley,
Topatopa Mountains, San Rafael Mountain, Downey, Mount Wilson, La
Panza Range, Burbank, El Monte, Newhall, Malibu Lake, Beverly
Hills, and Westlake Village
507 AM PDT Mon Mar 16 2026

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 10 AM
PDT TUESDAY...
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM TUESDAY TO 8 PM
PDT FRIDAY...

* WHAT...For the Heat Advisory, temperatures between 90 and 98
  expected. For the Extreme Heat Warning, dangerously hot conditions
  with temperatures between 96 and 104 expected.

* WHERE...A portion of southwest California.

* WHEN...For the Heat Advisory, from 10 AM this morning to 10 AM PDT
  Tuesday. For the Extreme Heat Warning, from 10 AM Tuesday to 8 PM
  PDT Friday.

* IMPACTS...There is a high risk for dangerous heat illness for
  anyone, especially for the very young, the very old, those without
  air conditioning, and those active outdoors.

* ADDITIONAL DETAILS...Warm overnight low temperatures will
  contribute to the heat risk, especially in the mountain and
  foothill locations.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

&&

$$



Heat Advisory

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
507 AM PDT Mon Mar 16 2026

CAZ088-342-345-351>353-356>358-368>376-378>380-548-170015-
/O.CON.KLOX.XH.W.0001.260317T1700Z-260321T0300Z/
/O.CON.KLOX.HT.Y.0003.260316T1700Z-260317T1700Z/
Santa Clarita Valley-Santa Lucia Mountains-San Luis Obispo County
Mountains-Santa Ynez Mountains Western Range-Santa Ynez Mountains
Eastern Range-Santa Barbara County Interior Mountains-Lake
Casitas-Ojai Valley-Central Ventura County Valleys-Los Angeles
County Inland Coast including Downtown Los Angeles-Western Santa
Monica Mountains Recreational Area-Eastern Santa Monica Mountains
Recreational Area-Calabasas and Agoura Hills-Western San Fernando
Valley-Eastern San Fernando Valley-Southeastern Ventura County
Valleys-Santa Susana Mountains-Southern Ventura County Mountains-
Interstate 5 Corridor-Western San Gabriel Mountains and Highway
14 Corridor-Eastern San Gabriel Mountains-Los Angeles County San
Gabriel Valley-
Including the cities of Hearst Castle, Santa Margarita Lake,
Northridge, Santa Paula, Mount Baldy, Gorman, Ojai, Woodland
Hills, Universal City, Matilija, Pomona, Culver City, Malibu
Bowl, Mill Creek, Valencia, Oat Mountain, Acton, Santa Clarita,
Pasadena, San Marcos Pass, Moorpark, Figueroa Mountain, East Los
Angeles, Compton, Lake Castaic, Van Nuys, Newbury Park, La Canada
Flintridge, Topanga, Norwalk, Meiners Oaks, Caliente Range, Tejon
Pass, Thousand Oaks, Pyramid Lake, Warm Springs, Oak View,
Wrightwood, Glendale, Piru, Irish Hills, Chatsworth, Sunland,
Fillmore, Hollywood, The Angeles Crest Highway, San Gabriel,
Montecito Hills, Simi Valley, Big Pine Mountain, Rose Valley,
Topatopa Mountains, San Rafael Mountain, Downey, Mount Wilson, La
Panza Range, Burbank, El Monte, Newhall, Malibu Lake, Beverly
Hills, and Westlake Village
507 AM PDT Mon Mar 16 2026

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 10 AM
PDT TUESDAY...
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM TUESDAY TO 8 PM
PDT FRIDAY...

* WHAT...For the Heat Advisory, temperatures between 90 and 98
  expected. For the Extreme Heat Warning, dangerously hot conditions
  with temperatures between 96 and 104 expected.

* WHERE...A portion of southwest California.

* WHEN...For the Heat Advisory, from 10 AM this morning to 10 AM PDT
  Tuesday. For the Extreme Heat Warning, from 10 AM Tuesday to 8 PM
  PDT Friday.

* IMPACTS...There is a high risk for dangerous heat illness for
  anyone, especially for the very young, the very old, those without
  air conditioning, and those active outdoors.

* ADDITIONAL DETAILS...Warm overnight low temperatures will
  contribute to the heat risk, especially in the mountain and
  foothill locations.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

&&

$$