(CBS SF) -- An area of low-pressure is parked over the Bay Area Thursday causing light showers and isolated thunderstorms.
Precipitation was reported falling around the North Bay in addition lightning strikes associated with the wraparound moisture.
The 3,000 foot deep cloud deck is producing the heavy drizzle in San Francisco, at the coast and even in some inland parts.
The mix of sun and clouds Thursday is an indication of unstable air mass which means we could see a thunderstorm pop up during the day, according to KPIX 5 Weather Anchor Roberta Gonzales.
A viewer captured video of cloud to ground lightning Thursday morning near Coalinga.
Skies will remain cloudy overnight with heavy drizzle and temperatures in the 60's and 70's sticking around by Friday morning.
A drier air mass moves in Friday afternoon, setting the stage for a warmer weekend.
Overnight, the National Weather Service reported nearly 200 lightning strikes near Fresno and in the High Sierra.
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