Yep, it's 90 degrees along the San Diego coast at night. Here's why

It’s Tuesday evening. The sun’s been down for a while. So why is the temperature still 90 or above in such coastal communities as Chula Vista, Camp Pendleton and North Island?

Over the past two days, Santa Ana winds have blown warm, dry air to the coast, and beyond. In fact, a lot of that hot air mass is hanging well offshore. So the sea breeze, when it does come to life, is simply pushing warm air back onshore.

The National Weather Service says that the coast will remain unusually warm at night into Thursday.

Sample of 6:45 p.m. temperatures: Chula Vista, 96; Imperial Beach, 91; Camp Pendleton, 90; North Island, 90; Carlsbad, 87.

Twitter: @grobbins

gary.robbins@sduniontribune.com

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