I had this shot last Saturday. The Ship Canal was fully frozen or almost fully.
Went back yesterday, dreaming about shots similar to this, but found the ice gone.
All you need is a strong wind and the high waves blown from the open Lake would break up the ice.
Thanks for looking.
Canon 5D Mark III
Canon 500 f4.0 L IS Mark II
ISO 320
1/2500 s
f5.6
HH.