Pismo Beach Ocean & Surf Report

Diablo Canyon Power Plant - Ocean/Surf Report for 10/20/2014

SWELL:
Arriving from the Northwest:
A 975-millibar storm developed in the Gulf of Alaska on Sunday. An 8- to 10-foot northwesterly (300-degree, deep-water) swell (with an 18- to 20-second period) from this storm will arrive along the county's coastline this afternoon into tonight. Strong to gale-force (25- to 38-mph) northwesterly winds along the California coast will further build this northwesterly sea and swell to 9- to 11-feet (with a 5- to 17-second period) Tuesday.

This northwesterly sea and swell will decrease to 6- to 8-feet (with a 6- to 13-second period) Wednesday and will remain at this level through Saturday.

An 8- to 10-foot northwesterly (305-degree, deep-water) sea and swell (with 7- to 13-second period) will arrive along our coastline Sunday into next Monday.

Hurricane Ana off the Hawaiian Islands has the potential to turn extratropical as it moves toward the Gulf of Alaska and could rapidly intensify late this week.

Arriving from the South
None to report.

SEAWATER TEMPERATURE:
A large and deep body of relatively warm seawater has moved from the south and extends along the Central Coast northward toward Point Reyes.

Intake seawater temperatures will range from 61 and 65 degrees through tonight.

Strong to gale force (25- to 38-mph) afternoon northwesterly winds Tuesday into Friday will produce a seawater cooling trend starting Tuesday and continuing through the weekend.

In fact, seawater temperatures will range between 59 and 63 degrees on Tuesday into Wednesday, further lowering to 58 and 61 degrees on Thursday into Friday. Seawater temperatures may decrease further by this weekend.

SEAWATER VISIBILITY:
Seawater visibility was 7 to 9 feet at the Diablo Canyon Intake.

OUTLOOK for SWELL:
DIR. NW HT. 9-11 PER. 7-18 Tuesday morning
Remaining at: DIR. NW HT. 9-11 PER. 7-17 Tuesday afternoon
Decreasing to: DIR. NW HT. 8-10 PER. 7-16 Tuesday night

OUTLOOK for WINDS:
DIR. NE SPEED 10-15 Tuesday morning
Increasing to: DIR. NW SPEED 20-25 + 35 Tuesday afternoon
Decreasing to: DIR. N SPEED 15-20 Tuesday night

EXTENDED OCEAN CONDITION OUTLOOK:
Hurricane Ana off the Hawaiian Islands has the potential to turn extratropical as it moves toward the Gulf of Alaska and could rapidly intensify late this week.