Williwaws are defined as...

"a sudden blast of wind descending from a mountainous coast to the sea," and we met them in full fury today as we skirted the lee side of an island near the middle of the Kuril archipelago named Chirpoy Brat:

The crosswind to the ship registered an average 35 meters/sec or about 68 knots (~80 miles per hour) for a period of time, and occasionally gusting to 45 m/s or 100 mph!

This resulted in about a 10 degree list of the ship to starboard for much of the morning. Here you can see the spray being whipped up by the fierce winds next to this basaltic sea stack: