On March 11, 2017 the windiest city in Canada lived up to its reputation and then some. As we meteorologists say, "the bottom to an intensifying low pressure system fell out." If you look at the six-hour surface analysis's history you will see it went from: 977 to 967 to 952 to 948 millibars and then began to fill (weaken). Because the rate of change of pressure was so great, an extra component to wind development ensued. This change in pressure tendency is isallobaric wind. This is the same phenomena thought to have sunk the Great Lakes freighter, the Edmund Fitzgerald, on Lake Superior November 10th, 1975. Torbay's winds peaked at 85 knots. See the METARs below.
Most aviation weather books don't mention this phenomena. Another reason to buy Canadian Aviation Weather.
Check out this VIDEO explaining this phenomena.