Excessive heat warning continues in Napa through Labor Day

Javier Stokes
September 3, 2017

There's a moderate to high risk for risky rip currents, the weather service says.

Wildfires across the West have worsened conditions for residents in the region.

San Francisco itself saw one of the hottest days in its history Friday at 106 (41 C) but is now expected to recede into its usual cool-and-foggy summer pattern with dramatic temperature drops into the 80s and then the 70s.

Saturday won't be a washout, but it will be mostly cloudy with a chance of showers mainly after 3 p.m. The city topped out at 102 degrees. At the same time moisture from tropical storm Lidia, now crossing Baja California, will get pulled northward and increase the threat for mountain thunderstorms.

Excessive heat warnings were issued from Los Angeles northward into parts of OR, the story said.

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The last time downtown San Francisco reached 100 degrees was on June 14, 2000 when it hit 103 degrees, which was the city's all-time record high until today. The Watch runs from early Friday through Sunday evening.

Temperatures that reached 108 in Sacramento on Friday are expected to shoot past 110 on Saturday as a sweltering week continued.

However, before showers and relief arrive, this moisture will also act to increase the dew points, making it feel more humid and exacerbating the heat in parts of southern California through Sunday. Keep an eye on both air quality and temperatures and stay this holiday weekend.

The National Weather Service in Portland noted that if the current forecast verifies it will be the hottest Labor Day weekend on record there. However, this ridge will remain in place over the Pacific Northwest.

Do not forget to take extra precautions if you will be spending time outdoors during this extreme heat.

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