Barometric Pressure Forecast for Stanford, California
Barometric pressure forecast for Stanford, California — on the San Francisco Peninsula between the Santa Cruz Mountains and the bay. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Stanford
Stanford occupies the gentle alluvial slope between the Santa Cruz Mountains and the southwestern shore of San Francisco Bay, on the warmer inland side of the range rather than the fog-bound ocean side. The mountains block most of the marine layer that floods the coast through summer, though it still leaks through the low gaps in the ridge overnight and burns off by mid-morning. The climate is genuinely Mediterranean, which splits the pressure pattern cleanly in two. From May to September the North Pacific High parks offshore, the trace flattens almost completely, and week after week passes with only a few hPa of movement. From November to March the high retreats and Pacific storms reach the coast, most of them modest but a handful arriving as atmospheric rivers, long plumes of subtropical moisture that produce the deepest falls of the year along with the flooding and the wind. Those events are the entire local barometric story. Between them the area often sits under a dry ridge for weeks, which is why a wet winter and a dry one can differ threefold.
What this means for you
Half the year here is almost flat and the other half arrives as a handful of atmospheric river events. A barometric pressure forecast is worth close attention from November to March and can be largely set aside in high summer.