Dense fog gives way to more mild temperatures Thursday

SAN DIEGO (KUSI) – Motorists on roadways along the coast and in the western valleys were advised to use extra caution Thursday morning as dense fog blankets the area.

A National Weather Service dense fog advisory for coastal and valley areas of San Diego County is set to remain in effect until 8 a.m. today. Included under the advisory are the entire San Diego County coastline, and the cities of Escondido, Poway and Santee.

Forecasters said travel on Interstates 5, 8, 15 and 805 and on state Routes 52, 56, 67, 78, 94 and 163 could be affected during the morning commute. Visibility could be reduced to a quarter-mile at times.

"A shallow marine layer will continue to create areas of dense fog along the coastal plain and into the far western portions of the San Diego County valleys though about 8 a.m.,” according to the weather service.

Drivers were urged to slow down, use low beams and leave plenty of distance in front of them. Forecasters said more dense fog could roll into areas up to 10 miles inland again tonight into Friday morning.

It will be partly cloudy throughout San Diego County Thursday once the morning fog clears.

High temperatures will be:

64 to 69 degrees at the beaches

  • 71 to 76 inland
  • 73 to 78 in the valleys
  • 58 to 68 in the mountains
  • Around 69 in the deserts.

A storm making its way across California will bring the chance of rain this weekend, though central, northern and mountainous California will get the brunt of the storm. 

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