I hopefully checked California reservoir levels this morning and nope.
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Marin's reservoirs jumped 10% in one day (scroll to the bottom of marinwater.org/sites/default…)
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IIRC Marin's reservoirs fill fast (large watershed area / reservoir volume) and drain fast (small reservoir volume / demand).
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The watershed area is also fairly small (you and I have hiked from Lake Lagunitas to nearly the top of Mt Tam) so the storm will end up in the reservoirs almost immediately and no over several days.
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Replying to @khuey_ @kimmaicutler
Still, the total capacity of Marin's 7 reservoirs is 1/44 that of Lake Oroville or 1/57 of Lake Shasta. Being in a rainier area does help.

Oct 25, 2021 · 6:22 PM UTC

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Replying to @davidbaron @kimmaicutler
Sure, Oroville got (almost) as much inflow on that same day as MMWD has total capacity.