Weather

Why the rain is likely done and June gloom happens

ecliptic.gifWe can probably close the books on this year's local rain season, JPL meteorologist Bill Patzert says in an email exchange picked up by Emily Green, the ace water blogger at Chance of Rain.com. By the way, the Los Angeles rainfall total for the season (14.66") falls below the recent average (15.24") though it's up from last year. From Patzert:

After the Vernal Equinox (last Saturday, March 20th), the Northern Hemisphere begins to rapidly warm up. This expands the North Pacific High and shrinks the North Pacific Low. As the High expands and strengthens, storms weaken and go farther to the north of California. Also, winds from the north (the eastern segment of the High) get stronger and upwelling along our coast picks up. Cooler water, more marine layer; thus, May gray and June gloom. The High is strengthening, northerly winds are becoming steadier, there is more coastal and inland fog, and no North Pacific storms … our dry six months.

And they say we have no seasons.


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