I have the impressions that tropical storms (typhoons) produce less turbulence in the upper atmosphere than extra-tropical storms (e.g. over the North Atlantic).
Of course, any airline should at least stay 200-300 miles away from the core of a typhoon, however, the wind blows more constantly into one direction -> less turbulence.
In an extra-tropical storm cold and warm air mixes around the polar jetstream -> strong turbulence.