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Can a hurricane in Mexico bring relief to the SoCal heat wave?  It should bring a lot of moisture

This satellite image made available by NOAA shows Hurricane Kay off the Pacific coast of Mexico on September 7. (NOAA)

Hurricane Kay is expected to bring plenty of moisture to Southern California, with temperatures still high heading into the weekend and humid conditions persisting through Sunday.

Kay, a system off the Mexican peninsula of Baja California, could bring humidity, flash floods, high winds and high waves in Southern California.

It follows the most brutal September heat wave in California history, which began last week and is expected to last nine days. Even at night, record low temperatures offer little relief to residents or power providers. And coastal areas – often a refuge from the heat – have also been hit by scorching temperatures.

Mark Moede, a meteorologist with the National Weather Service in San Diego for nearly 30 years, called this week a particularly “extraordinary” weather event for the region.

“We could go from one day where we have hot, dry weather, maybe Santa Ana type, and the next day…there will be patches of rain,” Moede said of Friday’s change in weather. see you Saturday. “It’s going to be a very dynamic weekend weather-wise.”

Kay, expected to be a tropical storm when closest to San Diego, is expected to bring a surge of moisture to Southern California beginning Friday. How this will affect Southern California is always under surveillancebut forecasters predict potential flash flooding, possible high winds and dangerous currents throughout the weekend.

The region has yet to cross the finish line for this marathon extreme weather event, said Casey Oswant, a meteorologist with the National Weather Service in San Diego. Saturday should be the start of cooler temperatures, although sticky conditions will remain.

“Unfortunately, Hurricane Kay may not bring too much relief from the heat,” Oswant said. lows should begin to travel south.

“It’s still going to feel pretty heavy.” Oswant added.

The biggest drops are expected in valleys and deserts. In the Coachella Valley, Palm Springs is expected to retreat from 108 degrees Thursday to 89 degrees Saturday, but the lows won’t budge much, with around 85 degrees expected Thursday morning and 78 degrees Saturday morning. Ocotillo Wells in the San Diego deserts will see a similar trend: 107 degrees Thursday and 89 degrees Saturday, with morning lows registering 86 degrees and 79 degrees, respectively.

The daytime decrease is largely due to more clouds in the area, Oswant said.

While the highs will drop slightly in the city of San Diego, the lows will drop from 73 degrees Thursday morning to 77 degrees Saturday morning. Increased humidity from the storm is making it difficult to lower low temperatures, especially on the coast, Oswant said. Sunday is expected to be particularly humid, with 90% to 100% humidity expected in the mountains and towards the coast, and the deserts expected between 50% and 70%, their maximum humidity.

Much of Southern California is expected to receive at least a half inch of rain Friday through Sunday. The National Oceanic and Atmospheric Administration’s Weather Prediction Center predicts possible flash floods.

The mountains and desert could see 2 to 3 inches of rain this weekend. Mt. Laguna is expected to get 3 and 4 inches of rain. Julian could see up to 2½ inches of rain. Motorists should also be aware of possible heavy rain along Interstate 8, Oswant said, which could see 1½ inches to 3 inches along parts of the freeway.

That could extend further north into the Coachella Valley and into the Riverside and San Bernardino Mountains, Oswant said.

The storm could also bring high winds, raising concerns for fire crews battling blazes near Hemet and another near Big Bear Lake.

David Sweet, a National Weather Service meteorologist in Oxnard, said weekend temperatures in parts of Los Angeles and Riverside counties are expected to be cooler starting Saturday, with a risk of thunderstorms expected in some areas. , but will remain stuffy and humid.

This story originally appeared in the Los Angeles Times.


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