"Offshore" flow occurs when the pressure is higher over the land than over the ocean, often resulting in north-east winds over Southern California. This is also referred to as the Santa Ana effect, or the Santa Ana winds. The terrain here often enhances the offshore breezes because as the winds are forced through the narrow canyons, they increase in speed. This is referred to as the Bernoulli effect. This is why during Santa Ana's, some places will have winds exceeding 50 mph and others will have almost nothing

http://www.kfwb.com/news/local/santaana.html

Thanks, Bill. Now to consider the Bernoulli effect...

WindWard