LOS ANGELES (CNS) – Heat advisories remained in effect Friday across much of the Southland, with forecasters warning that only limited relief is expected this weekend before another round of potentially dangerous heat arrives next week.
A heat advisory covering inland coastal areas, including downtown Los Angeles, will remain in effect until 10 a.m. Tuesday, according to the National Weather Service. Temperatures in those areas could reach the mid-90s.
A separate heat advisory covering the Santa Clarita, San Fernando and San Gabriel valleys, along with the San Gabriel Mountains and the Antelope Valley (14) Freeway corridor, will also remain in effect until Tuesday morning.
Both advisories had originally been scheduled to expire Friday night, but forecasters extended them into next week because of continued hot conditions and the possibility of more extreme heat beginning Tuesday.
When the advisories expire Tuesday morning, they will be replaced by an extreme heat watch that will remain in effect through Thursday evening.
Forecasters said temperatures in some valley and mountain communities next week could climb as high as 112 degrees, while inland coastal areas could rise into the low triple digits.
Temperatures Friday are expected to remain 5 to 10 degrees above normal, with highs ranging from the upper 70s and 80s near the beaches to the 90s in most valleys and 100 to 110 degrees in the warmest valley and desert communities.
“Moderate heat impacts will continue through Friday away from the coast in response to a strong ridge of high pressure over the region,” according to the weather service.
Forecasters said a slight cooldown is expected this weekend as the ridge weakens and shifts eastward, although heat impacts will continue in inland communities.
“Temperatures will begin to build once again on Tuesday, potentially reaching Major Heat Risk levels, with the monsoonal moisture adding to the discomfort from the heat,” forecasters said.
The incoming monsoonal moisture could also bring a 10% to 20% chance of showers and isolated thunderstorms beginning Sunday and continuing into next week, primarily during the afternoon and evening hours in mountain areas, particularly in eastern Los Angeles County.
Forecasters also warned that a south-to-southwest swell affecting local beaches through next week could increase the risk of rip currents and contribute to minor coastal flooding during periods of high tide.
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