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Cooler Weather Expected This Week Across SD County

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A 13-year-old male polar bear, Kalluk is rolling in 28 tonnes of snow at the San Diego Zoo.Photo courtesy of San Diego Zoo

Forecasters expect cool weather throughout San Diego County this week, with high clouds steadily flowing throughout most of Saturday.

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According to the National Weather Service, there were multiple reports on Saturday morning that heavy fog affected parts of the coast with visibility below 100-200 feet.

“Still, most inland valleys warmed up in the 70’s and 80’s, which will be the warmest in the next seven days,” the forecaster said.

According to the NWS, Saturday coastal highs were expected to be 66-71 degrees Celsius, and nighttime lows were expected to be 48-54 degrees Celsius. The highest value for inland valleys is 76-81 and the lowest value for nighttime is 50-57.

The highest temperature in the mountains was 68-75, and the lowest overnight temperature was expected to be 45-55. The highest temperature in the desert is about 84 degrees Celsius, and the lowest temperature at night is 55-65 degrees Celsius.

Spotted thick fog can reappear along parts of the coast from Saturday night to Sunday morning, but coverage is likely to be limited, forecasters said. Weak upper cyclones along the west coast on Sundays and Mondays cause temperatures to cool until Monday. On Mondays, most of the highest temperatures remain in the 1960s west of the mountains.

“Land currents reactivate the ocean layer on Sunday night, and wider cyclones affect coastal and valley areas,” NWS said. “On Tuesday, the trough sways east, so a slight offshore stream can cause a slight increase in temperature, but the slight surface pressure gradient makes the wind weaker.”

The second valley, just behind Wednesday and Thursday, provides additional cooling and a return to the terrestrial wind regime, along with deeper ocean layers.

“This makes Thanksgiving a little cooler than usual, and there is a slight chance of spotted light rain to the west of the mountain,” the forecaster said.

In coastal waters, late Saturday afternoon to Sunday morning, mottled thick fog can occur, with visibility of less than one nautical mile.

– City News Service

Expected cool weather this week across SD County Last changed: November 21, 2020 Along Debbie L. Sclar

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