Question 754Navigation General

The correct answer is D) wind circulation and forward motion of the storm. The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the combined effect of the storm's wind circulation and its forward motion. As the storm moves forward, the wind speed in the right-front quadrant (relative to the storm's direction) is enhanced by the addition of the storm's forward motion to the cyclonic wind flow. This results in higher wind speeds in the dangerous semicircle compared to the less dangerous left-rear quadrant. The other options are incorrect because they do not directly explain the higher wind velocities in the dangerous semicircle. Option A refers to the low-pressure ridge, option B mentions the recurvature effect, and option C describes the direction of circulation and pressure gradient, but none of these directly address the reason for the higher wind speeds in the dangerous semicircle.