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I'm researching summer weather patterns in preparation for a cruise around Vancouver Island in 2009. Can you explain "summer advection fog"?

Question submitted by Wayne Saewyc
(Richmond, B.C.)

Advection fog is formed by the slow passage of relatively warm, moist, stable air over a colder wet surface. It is common at sea whenever cold and warm ocean currents are in close proximity and may affect adjacent coasts. A good example is provided by the frequent dense fogs formed off the Grand Banks of Newfoundland in summer, when winds from the warm Gulf Stream blow over the cold Labrador. Equally this phenomena is common during the summer months around Vancouver Island.
Don't be too put off Wayne, from taking a criuse next summer, the presence of this fog can often make for spectacular photos!
Have a great cruise.

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