Some coastal parts of the Southland looked more like London late Friday when an unexpected bank of fog moved into the area, disrupting what had been an otherwise warm — albeit hazy — afternoon.

According to the National Weather Service, the foggy conditions were the result of a deepening marine layer that began developing Thursday night and is expected to continue bringing stretches of fog, clouds and even light drizzle Friday night and Saturday from the Southland all the way north to Santa Clarita.

“A weak cold front is approaching from the north and this will further increase onshore flow and cause the marine layer to rapidly deepen later (Friday night) into Saturday, mainly across LA/Ventura counties,” according to the NWS. “In fact, there’s a good chance we’ll see some drizzle or even light showers, especially along the foothills of the eastern San Gabriels.”

Lows on Friday night were expected to reach the mid 50s and then dip into the 40s for Saturday. Winds were expected from the north ranging from 15 to 25 mph in Los Angeles and the vicinity, the NWS said.

On Saturday, the San Gabriel Valley area was expected to experience heavier fog and a 20% chance of showers, with lows in the 40s. The San Fernando Valley will experience heavy fog, drizzle and lows in the 40s to 50s, according to the NWS. On Saturday, the area will experience low clouds, fog and a 20% chance of drizzle.

The Santa Clarita Valley will likely experience heavy fog, cloudy skies and lows in the mid 40s and 50s Friday night, the NWS predicted. On Saturday, the area will see low clouds, heavy fog and drizzle in the morning, changing to partly cloudy skies during the day with highs in the upper 50s to the mid 60s.

Drivers were urged to take extra precautions dealing with foggy conditions, according to the NWS.

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