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The heat is on! Warmest temperatures of the year so far expected Tuesday

SF Gate logo SF Gate 4/23/2019 Amy Graff
a group of people in a large body of water: Crowds of people flocked to Lake Merritt Saturday, Feb. 3, 2018 in Oakland, Calif. to enjoy the sunshine. Temperatures reaching into the mid to high 70s this weekend are expected to break records across the Bay Area for this time of the year. © Provided by Hearst Newspapers Crowds of people flocked to Lake Merritt Saturday, Feb. 3, 2018 in Oakland, Calif. to enjoy the sunshine. Temperatures reaching into the mid to high 70s this weekend are expected to break records across the Bay Area for this time of the year.

Mother Nature is cranking up the furnace.

On Tuesday, temperatures around the Bay Area are expected to soar 10 to 20 degrees above average with high-70s to low-80s on the coast and high-80s inland.

"Wouldn't be surprised to see some isolated spots in far interior locations away from the ocean eclipse 90 degrees," reports the National Weather Service's Bay Area office.

A high-pressure ridge hunkered down along the West Coast is blocking storm activity off the Pacific Ocean and allowing the region to warm up. What's more, offshore winds have kicked up and are blowing hot air from the inland valleys toward the coast.

a close up of a device: An atmospheric river-driven weather system is poised to blast Northern California Friday and Saturday. © Provided by Hearst Newspapers

An atmospheric river-driven weather system is poised to blast Northern California Friday and Saturday.

"This will be the warmest we've been so far this year, especially in inland areas," says Roger Gass, a forecaster with the NWS.

On Tuesday, San Francisco is expected to reach a high of 74 degrees, San Jose 87, Concord 88, San Rafael 81, Santa Rosa and Fairfield 89 and Sacramento 90. Temperatures aren't expected to break any same-day records.

The summery weather trend continues Wednesday with temperatures possibly dropping a degree or two. Things will start to cool more significantly Thursday with winds switching to on shore and blowing cool air from the Pacific inland.

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