Do You Know Which Way the Wind Blows?

Anyone want to help these people with an answer?….Below is a post from Thursday on CASKA, the Chicago Area Sea Kayakers Association web site:

Meteorology Conundrum

Here are wind and waves for this Friday night:

So far so good: the wind is from the west and the waves are predictably building with increasing fetch from Illinois to Michigan side of the lake.
Now here are the predictions for Saturday noon or 15 hours later:

The winds have shifted to the north somewhat but are still predominantly west. The wind shift to the north was gradual. The waves are still gaining height from west to east.
But what happened to the wave direction?! Is it just me or does it seem odd that on the west side of the lake the waves have turned nearly perpendicular to the wind direction!