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NOAA's National Weather Service
Each location shows all alerts on one page
WARNINGS - WATCHES - ADVISORIES - STATEMENTS
Updates every 15 Minutes
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 EXTREME HEAT WARNING |
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| San Luis Obispo County | ||
| Effective: Tue, 3/17 1:21pm | Severity: Severe | |
| Updated: March 17, 2026 10:45 pm | Urgency: Expected | |
| Expires: Wed, 3/18 1:30am | Certainty: Likely | |
| Areas Affected: 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 | ||
Alert
Details:
* WHAT...Dangerously hot conditions with high temperatures between 96 and 104 expected. * WHERE...Most valley, lower mountain, and inland coastal areas of southwest California. * WHEN...Until 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. Information: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. |
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 HEAT ADVISORY |
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| San Luis Obispo County | ||
| Effective: Tue, 3/17 1:21pm | Severity: Moderate | |
| Updated: March 17, 2026 10:45 pm | Urgency: Expected | |
| Expires: Wed, 3/18 1:30am | Certainty: Likely | |
| Areas Affected: Cuyama Valley - Southern Salinas Valley - San Luis Obispo County Interior Valleys | ||
Alert
Details:
* WHAT...Hot conditions with high temperatures between 87 and 97 expected. * WHERE...Cuyama Valley, San Luis Obispo County Interior Valleys, and Southern Salinas Valley. * WHEN...Until 8 PM PDT Friday. * IMPACTS...There is a high risk for heat illness for sensitive populations including 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 foothill locations. Information: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. |
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| HEAT ADVISORY |
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| San Luis Obispo County | ||
| Effective: Tue, 3/17 1:21pm | Severity: Moderate | |
| Updated: March 17, 2026 10:45 pm | Urgency: Expected | |
| Expires: Wed, 3/18 1:30am | Certainty: Likely | |
| Areas Affected: Catalina and Santa Barbara Islands - San Luis Obispo County Beaches - San Luis Obispo County Inland Central Coast - Santa Barbara County Central Coast Beaches - Santa Barbara County Inland Central Coast - Santa Ynez Valley - Santa Barbara County Southwestern Coast - Santa Barbara County Southeastern Coast - Ventura County Beaches - Ventura County Inland Coast - Malibu Coast - Los Angeles County Beaches - Palos Verdes Hills | ||
Alert
Details:
* WHAT...Hot conditions with high temperatures between 87 and 97 expected. * WHERE...For most coastal areas of southwest California. * WHEN...Until 8 PM PDT Friday. * IMPACTS...There is a high risk for heat illness for sensitive populations including 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 foothill locations. Information: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. |
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| HEAT ADVISORY |
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| San Luis Obispo County | ||
| Effective: Mon, 3/16 4:47pm | Severity: Moderate | |
| Updated: March 17, 2026 10:45 pm | Urgency: Expected | |
| Expires: Tue, 3/17 9:30am | Certainty: Likely | |
| Areas Affected: Cuyama Valley - Southern Salinas Valley - San Luis Obispo County Interior Valleys | ||
Alert
Details:
* WHAT...Temperatures between 90 and 98 expected. * WHERE...Cuyama Valley, San Luis Obispo County Interior Valleys, and Southern Salinas Valley. * WHEN...From 10 AM Tuesday to 8 PM PDT Friday. * IMPACTS...There is a high risk for heat illness for sensitive populations including the very young, the very old, those without air conditioning, and those active outdoors. Information: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. |
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