* WHAT...Dangerously hot conditions with temperatures up to 102.
* WHERE...Catalina and Santa Barbara Islands, Los Angeles County Beaches, Los Angeles County Inland Coast including Downtown Los Angeles, Malibu Coast, Palos Verdes Hills, Santa Barbara County Southeastern Coast, Santa Barbara County Southwestern Coast, Ventura County Beaches, and Ventura County Inland Coast.
* WHEN...Until 8 PM PDT Friday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat events.
* WHAT...Dangerous rip currents and breaking waves due to elevated surf expected.
* WHERE...Catalina and Santa Barbara Islands, Ventura County Beaches, Malibu Coast and Los Angeles County Beaches.
* WHEN...From late tonight through Thursday evening.
* IMPACTS...There is an increased risk of ocean drowning. Rip currents can pull swimmers and surfers out to sea. Waves can wash people off beaches and rocks, and capsize small boats nearshore.
* ADDITIONAL DETAILS...High tides around 6 feet will occur in the evening hours.
* WHAT...For the Heat Advisory, temperatures up to 94 expected. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 100 possible.
* WHERE...Catalina and Santa Barbara Islands, Los Angeles County Beaches, Los Angeles County Inland Coast including Downtown Los Angeles, Malibu Coast, Palos Verdes Hills, Santa Barbara County Southeastern Coast, Santa Barbara County Southwestern Coast, Ventura County Beaches, and Ventura County Inland Coast.
* WHEN...For the Heat Advisory, from 10 AM this morning to 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening.
* IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses.
...RED FLAG WARNING IN EFFECT FROM 10 AM TODAY TO 3 PM FRIDAY FOR MANY INTERIOR PORTIONS OF SOUTHWEST CALIFORNIA DUE TO EXTREME HEAT AND INSTABILITY ALONG WITH LOCALLY GUSTY WINDS AND LOW HUMIDITIES... .A very hot and unstable air mass combined with locally gusty winds and low humidities will bring a significant risk of large plume dominated fires with rapid spread and extreme fire behavior.
* TEMPERATURES...Highs 98 to 108 across the lower mountains, adjacent foothills and Cuyama Valley, and 85 to 95 across higher mountains. Lows in the mid 70s to mid 80s common in the mountains and foothills.
* INSTABILITY...Very deep mixing heights of 12,000 to 20,000 feet today through Thursday, slightly lower on Friday.
* WINDS...Local northwest to north winds 15 to 25 mph with gusts up to 35 mph at times, strongest across the I-5 and Highway 33 corridors. A slightly stronger northerly wind push is possible late Thursday night into Friday morning, with gusts up to 40 mph possible across the I-5 corridor.
* RELATIVE HUMIDITY...Minimum humidities 10 to 20 percent each day, with isolated values as low as 8 percent Wednesday through Friday. Poor recoveries overnight hours in the mountains and foothills with humidities in the 15 to 30 percent range.
* IMPACTS...There is a significant risk of large plume dominated fires with rapid fire spread and extreme fire behavior. There is a history of large plume dominated fires this time of year with similar weather and fuel conditions, including the Bridge, Bobcat, and Station fires.
* WHAT...The South Coast AQMD has issued an air quality alert due to harmful levels of ozone pollution. Visit https://www.aqmd.gov/alertinfo to check current and forecasted air quality levels.
* WHERE...in the the South Coast Air Basin and Coachella Valley. Levels of ozone pollution can vary by time and location depending on emissions and air pollution transport.
* WHEN...from 1 PM Monday to 8 PM Friday. The highest ozone levels typically occur in the afternoon and early-evening hours.
* IMPACTS... Ozone air pollution can cause serious health problems, including trouble breathing, asthma attacks, and lung damage. Everyone can be affected, but sensitive groups such as people with lung disease, older adults, people who are pregnant, children, and those who spend a lot of time outdoors are at greater risk.
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Tuesday, Aug 25 Clear conditions throughout the day. |
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Wednesday, Aug 26 Partly cloudy throughout the day. |
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Thursday, Aug 27 Partly cloudy throughout the day. |
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Friday, Aug 28 Partly cloudy throughout the day. |
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Saturday, Aug 29 Clear conditions throughout the day. |
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Sunday, Aug 30 Clear conditions throughout the day. |
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Monday, Aug 31 Clear conditions throughout the day. |
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Tuesday, Sep 1 Partly cloudy throughout the day. |
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Wednesday, Sep 2 Partly cloudy throughout the day. |
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Thursday, Sep 3 Partly cloudy throughout the day. |
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Friday, Sep 4 Clear conditions throughout the day. |
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Saturday, Sep 5 Clear conditions throughout the day. |
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Sunday, Sep 6 Clear conditions throughout the day. |
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Monday, Sep 7 Clear conditions throughout the day. |
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Tuesday, Sep 8 Clear conditions throughout the day. |