Just lost power for an hour in Sacramento/Natomas and spent time on my cell checking the weather. Got curious about what barometric pressure actually means. Barometers were used in the old days to forecast weather, long before there were satellites and computers and all kinds of sensors.
U.S. Weather Service says barometric pressure in my area is currently at 29.22 and falling. Lowest pressure ever recorded in Sacramento was 28.95 on Jan. 27, 1916. So, things are getting pretty funky low-down around here.
Science.com says barometric pressure rarely increases or decreases more than 1 inch of mercury above or below the 30-inch mark unless weather conditions are extreme -- or will be in a couple of days.
Weather experts say pressure readings are most useful for forecasting weather during the next 12 to 24 hours -- as in telling us what's about to happen. In general, a falling barometer indicates the approach of a storm. Forecasts for Northern California call for a big storm Sunday night into Monday, which barometers seem to confirm. Just hope it's not too big.
If the mercury continues to fall, atmospheric scientists say the weather will worsen. When the mercury level is between 30.20 and 29.80 inches and dropping rapidly, (like it is now) expect precipitation. If the reading is less than 29.80 inches and still shooting down, expect, my words, to get walloped.
But not to worry, as of 2010, the lowest air pressure ever recorded for a hurricane was Gilbert in 1988. Its air pressure was just above 26 inches. Hurricane Sandy in 2012 hit a barometric pressure low of 27.92 over Atlantic City, New Jersey. Things could be worse and California water experts say we'll likely be able to ride out the next series of storms without further damage to Oroville Dam
“Just as a solid rock is not shaken by the storm, even so the wise are not affected by praise or blame.” ----The Buddha.