High surf advisory beginning Thursday morning

By on Wed, December 16, 2009

The National Weather Service has issued a high surf advisory for 4am to 2pm Thursday.

Swell heights will gradually increase along the coast very late tonight and Thursday with swell heights peaking between 15 and 16 feet with 14 second swell periods Thursday. The arrival of the swell  train will coincide with a high tide of 6.1 feet at 11:07 am Thursday  morning at the Golden Gate… But coastal flooding is not expected to  be a primary issue. Some swell sets along west facing beaches could reach as high as 17 to 19 feet during the day.

The NWS expects this to be a fairly short lived event with swell heights to drop below 15 feet by Thursday evening.

A high surf advisory means that high surf will produce rip currents and localized erosion on beaches.