Thursday morning forecast June 17th

Temperatures aren't changing much Thursday on the South Coast or in the interior, but the Central Coast is finally seeing relief. Both coasts will be in the 70s to 80s. The interior will still be in the 90s to 100s.

A warm air mass is lingering in the region. Offshore flow from the north is going to flip onshore, bringing a dramatic cool-down to the Central Coast. Low clouds may filter through Ventura County and parts of the South Coast in the morning with an eddy.

An excessive heat warning remains in effect in the San Luis Obispo County valleys, and all mountain areas in the region, through Saturday night. The warning in the Santa Ynez and Ventura County valleys has downgraded to a heat advisory and will last through Friday night.

Onshore flow will continue to increase Friday and temperatures will stay slightly above average, though will continue cooling. The cooling trend will continue through Father's Day weekend as the ridge of high pressure moves to the south and east.

By Monday, temperatures will reach near or slightly below normal. More onshore flow will deepen the marine layer into Tuesday.