The little box off the coast (as seen in the loop) is a special marine warning…

SPECIAL MARINE WARNING
PZZ545-560-575-251715-
/O.NEW.KMTR.MA.W.0004.080125T1639Z-080125T1715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
839 AM PST FRI JAN 25 2008

THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO BAY AREA HAS ISSUED A

• SPECIAL MARINE WARNING FOR…
  WATERS FROM PIGEON PT. TO PT. PIEDRAS BLANCAS CA FROM 20 TO 60 NM
  OVER PACIFIC WATERS…
  COASTAL WATERS FROM PIGEON POINT TO POINT PINOS CALIFORNIA OUT TO
  20 NM OVER PACIFIC WATERS…
  COASTAL WATERS FROM POINT REYES TO PIGEON POINT CALIFORNIA OUT TO
  20 NM OVER PACIFIC WATERS…

• UNTIL 915 AM PST

• AT 833 AM PST…NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF THUNDERSTORMS…PRODUCING STRONG WINDS 34 KNOTS OR GREATER
  FROM COASTAL WATERS FROM PIGEON POINT TO POINT PINOS CALIFORNIA OUT
  TO 20 NM TO WATERS FROM PIGEON PT. TO PT. PIEDRAS BLANCAS CA FROM
  20 TO 60 NM…OR FROM 11 NM WEST OF PIGEON PT. TO 36 NM WEST OF
  CARMEL-BY-THE-SEA…MOVING NORTH AT 10 KNOTS.

• THESE STRONG THUNDERSTORMS WILL BE NEAR
  WATERS FROM PIGEON PT. TO PT. PIEDRAS BLANCAS CA FROM 20 TO 60 NM
  AT 850 AM PST…
  COASTAL WATERS FROM PIGEON POINT TO POINT PINOS CALIFORNIA OUT TO
  20 NM AT 850 AM PST…
  COASTAL WATERS FROM POINT REYES TO PIGEON POINT CALIFORNIA OUT TO
  20 NM AT 850 AM PST…

MARINERS CAN EXPECT GUSTY WINDS…HIGH WAVES…DANGEROUS LIGHTNING… AND HEAVY RAINS. BOATERS SHOULD SEEK SAFE HARBOR IMMEDIATELY…UNTIL THIS STORM PASSES.

LAT…LON 3717 12240 3628 12259 3627 12290 3751 12259
TIME…MOT…LOC 1639Z 186DEG 14KT 3717 12261 3637 12262