Day 22 — Full Up to Pussy’s Bow
It's the time of year when the sun and moon reach their closest point to Earth, aligning the celestial bodies like a perfect cue shot to create maximum gravitation pull.
The resulting surge of the ocean's waters, often referred to by the non-scientific term king tides, usually occurs in December and January. Predicting tides is easy as they've tracked them for so long and the mathematics can tell you exactly how much the water is going to rise. Where it differs, year to year, are tidal anomalies. Those tidal anomalies are anything that makes the water level higher or lower than predicted.
One anomaly that could exacerbate the tides is above-normal water temperatures. In December, Northern California temperatures for the Pacific Ocean are usually in the mid-50s, but in recent weeks they've been in the high-50s and even brushing with 60 degrees in Monterey Bay. Warmer waters can cause thermal expansion, leading ocean waters to rise a couple inches above tidal tables.
Another factor is a moderate swell. Fifteen-foot waves off Northern California's shores could push and pile the water higher.
Each time San Francisco gets hit with king tides we get a glimpse of what the future holds.
Photo: Pier 14 is the first place for rising waters to breach the seawall along the Embarcadero.