Heat Advisory
URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
613 AM PDT Mon Aug 17 2026
CAZ038-088-343>345-351-353-371>373-375-376-379-380-548-210300-
/O.CON.KLOX.HT.Y.0013.260818T1700Z-260821T0300Z/
Cuyama Valley-Santa Clarita Valley-Southern Salinas Valley-San
Luis Obispo County Interior Valleys-San Luis Obispo County
Mountains-Santa Ynez Mountains Western Range-Santa Barbara County
Interior Mountains-Calabasas and Agoura Hills-Western San
Fernando Valley-Eastern San Fernando Valley-Santa Susana
Mountains-Southern Ventura County Mountains-Western San Gabriel
Mountains and Highway 14 Corridor-Eastern San Gabriel Mountains-
Los Angeles County San Gabriel Valley-
Including the cities of Glendale, Chatsworth, Universal City,
Shandon, Atascadero, Newhall, Woodland Hills, Van Nuys, Wrightwood,
New Cuyama, San Gabriel, Santa Clarita, Warm Springs, Paso Robles,
Creston, San Rafael Mountain, Rose Valley, Pomona, San Marcos Pass,
Mount Baldy, Oat Mountain, East Los Angeles, Acton, The Angeles Crest
Highway, Sunland, Big Pine Mountain, Westlake Village, La Panza
Range, La Canada Flintridge, Malibu Lake, Pasadena, Valencia, Mount
Wilson, Lake Nacimiento, Lake Castaic, Mill Creek, El Monte, Topatopa
Mountains, San Miguel, Northridge, Burbank, Carrizo Plain, Caliente
Range, Figueroa Mountain, Matilija, Santa Margarita Lake, and
Templeton
613 AM PDT Mon Aug 17 2026
...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT
THURSDAY...
* WHAT...High temperatures of 92 to 105 expected, with most areas
seeing peak heat on Wednesday and Thursday. Low temperatures are
expected to range from the upper 60s to lower 70s at lower
elevations to the mid 70s to lower 80s in the foothills and
mountains.
* WHERE...A portion of southwest California.
* WHEN...From 10 AM Tuesday to 8 PM PDT Thursday.
* IMPACTS...Hot temperatures may cause heat illnesses. Warmer than
normal low temperatures will add to the heat discomfort.
* ADDITIONAL DETAILS...The heat advisory may need to be extended into
Friday for portions of the forecast area, but there remains
considerable uncertainty at this time.
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.
&&
$$
DG
Small Craft Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
840 AM PDT Mon Aug 17 2026
PZZ475-172345-
/O.EXT.KEKA.SC.Y.0075.000000T0000Z-260820T0400Z/
Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm-
840 AM PDT Mon Aug 17 2026
...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 PM PDT WEDNESDAY...
* WHAT...North winds 15 to 25 kt with gusts up to 35 kt and seas
6 to 9 feet.
* WHERE...Waters from Cape Mendocino to Pt. Arena CA from 10 to
60 nm.
* WHEN...Until 9 PM PDT Wednesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
809 AM PDT Mon Aug 17 2026
PZZ570-172315-
/O.CON.KMTR.SC.Y.0094.260818T1000Z-260818T2200Z/
Waters from Point Arena to Point Reyes 10-60 NM-
809 AM PDT Mon Aug 17 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 3 AM TO 3 PM PDT
TUESDAY...
* WHAT... Northwest winds 15 to 20 kt with gusts up to 25 kt
expected.
* WHERE...Waters from Point Arena to Point Reyes 10-60 NM.
* WHEN...From 3 AM to 3 PM PDT Tuesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
For more information from the National Weather Service visit
http://weather.gov/sanfrancisco
