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San Francisco Bay water running above predicted tide
November 3, 2026
Water at San Francisco Bay on November 3, 2026, at 5:36 PM was 0.434 m above predicted level. The persistent elevation from an El Niño Kelvin wave continues to amplify normal tidal variations; this will compound with king tides beginning November 24 to 26, when predicted tides will peak at 7.03 feet at San Francisco.
Monarch butterfly spotted late in fall migration
November 3, 2026
A butterfly was recorded on 2026-10-27 in San Francisco, during the late phase of fall migration toward California coastal overwintering groves. Migration peaks around October 18 but continues through December, with this observation documenting passage still occurring nine days past the typical peak. The species is proposed for federal Threatened listing and represents a native insect moving through the peninsula's urban habitat en route to winter sites.
Coyote brush releases seeds across the Peninsula
November 3, 2026
Coyote brush is releasing seeds on the Peninsula, with flowers, pollen release, and recent fruit drop all documented on October 31. Seed dispersal from October through January is typical for this fall-blooming native shrub, with seeds timing their germination to winter rains.
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