Weather to stay warm for the weekend

San Franciscans might be wise to bulk up on supplies of sunscreen, bathing suits and cooling fans this weekend, as temperatures are expected to soar to near-record highs during the next few days.

The expected high for Friday and Saturday is 89, just five degrees below the all-time record for those dates in San Francisco, according to Mark Ressler, lead meteorologist for the nationally syndicated Weather Channel. The forecast also calls for clear and sunny skies for Friday, Saturday and Sunday.

An atypical pattern of warm air aloft the Bay Area is pushing weather conditions into San Francisco that are historically more consistent with California’s interior, Ressler said. The upper-level pressure of the pattern is also lessening the cooling effects of the Pacific Ocean and calming the wind levels in San Francisco, Ressler said.

On Sunday, temperatures are expected to drop down to 82, which is still about 5 degrees to 10 degrees warmer than typical San Francisco temperatures for this time of year, according to Ressler.

Once the warm-air pattern passes as expected by Sunday, temperatures will drop down to normal levels of the mid- to lower 70s starting Monday, according to Ressler.

Along with the high temperatures, other conditions are prompting local authorities to be mindful of the weather.

The Bay Area Air Quality Management District has declared today and Friday “Spare the Air” days. The air district issues the advisories when ground ozone levels are expected to exceed federal health standards.  During “Spare the Air” days commuters are encouraged to travel on public transit to help reduce the amount of carbon emissions in the air.  Public transit prices in the Bay Area will remain the same.

wreisman@sfexaminer.com

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