1986. It was a beautiful summer afternoon at the Rouyn-Noranda airport (CYUY). The Transport Canada flight service station employees knew that a cold front was approaching and would soon sweep the airport. Until then, it was still a perfect day. Blue sky, light winds. At the time, the flight service specialists (FSS) did not have access to radar images or satellite pictures.
To get an idea of what was coming from the west, we were normally using an Environment Canada aviation weather forecast and the actual weather observations of two flight service stations in Ontario, Earlton FSS and Timmins FSS. Their last weather observation mentioned a wind shift and an isolated thunderstorm. But Timmins was far away and could only provide us with a rough estimate of the situation.
As I was working the evening shift on that day, I checked the wind speed indicator, as a reflex developed throughout the years. What I saw was kind of unreal. The speed indicator’s needle suddenly went from showing few knots to 20 knots, and then 40 knots, hesitated a little then went up to 60 knots and, in a final correction, reached 72 knots, which was about 134 km/h.
Everything was so peaceful around the flight service station. I looked through the window to detect any moving object. At that very moment, the wooden shed normally used by the fuel man passed in front of the station. That wooden structure must certainly have weighted few hundred kilos. The fact that it was moving at a good speed was a clear indication that the instruments were working properly. A squall line was associated with the cold front progression.
Everything that was not properly fixed to the ground started moving. In the next hour, strong thunderstorms going eastward moved in over Rouyn-Noranda. The Val-d’Or airport (CYVO) being located sixty miles east, it was clear that it would be hit directly in about two hours. I called the Val-d’Or control tower so that everyone got prepared for the squall line. That gave them enough time to tie everything correctly and damages were limited.
One hour later, everything was back to normal in Rouyn-Noranda and we profited from an ideal summer night.
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