Figure 2.8

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Figure 2.8: A method for defining the "principal outflow jet" using an upper-tropospheric streamline analysis. All streamlines which cross a circle around the tropical cyclone's core convective region are candidates, shown with intermediate line widths. Of these streamlines, the one which is associated with the strongest wind speed within 1000 km of the tropical cyclone center is designated the "principal outflow jet." In the example, it exits the storm at a bearing of 60° and crosses 1000 km radius at 150°, having passed through 90° of azimuth, or one complete quadrant.

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