|From CNN.com here, photographer is |
Kent Mishmura, Getty Images.
I couldn't find any specific reference to the source of the northwest swell. There are two storms listed here, Tropical Storm LINGLING, and Tropical Depression INVEST, and I'm assuming that one or both are the drivers of the swell. However, neither of these is mentioned in the 1/21/2014 NOAA description of conditions appended at the end of this post. (Note that it discusses both big waves during the past week, and forecasted for the next few days.) NOAA attributes the waves to a low with hurricane force winds far to the northwest of Hawaii.