Write an extended paragraph to describe the distribution of tropical storms. 96-110 MPH Sustained Winds These storms have extremely dangerous winds that will cause extensive damage. The strength and magnitude of these storms can be gauged in several ways. Cyclones of the Southern Hemisphere are measured by wind speed and assigned a category number. Use the atlas and page 71 of your textbook to help you. Tropical storms form from an atmospheric disturbance like a tropical wave or group of thunderstorms. The TRMM satellite, or Tropical Rainfall Measuring Mission, launched in 1997. Whether or not they are classified as a cyclone is also determined by barometric pressure. 1. Tropical Storm: A tropical cyclone with maximum sustained winds of 39 to 73 mph (34 to 63 knots). Tropical cyclones also occur in various parts of the Pacific Ocean, and can affect coastal regions of Mexico, south-east Asia, north-east Australia and the south Pacific islands. In the western North Pacific, hurricanes are called typhoons; similar storms in the Indian Ocean and South Pacific Ocean are called cyclones. Tropical storms are measured using the Saffir-Simpson scale. Because this air moves up and away from the surface, there is less air left near the surface. Preparation and prediction techniques can be very different in MEDCs and LEDCs. 74-95 MPH Sustained Winds These storms have dangerous winds that will produce some damage. Tropical cyclones which occur in the Atlantic region and affect the Caribbean and USA usually comprise less than 15% of global tropical cyclone activity. How do hurricanes form? Hurricane: A tropical cyclone with maximum sustained winds of 74 mph (64 knots) or higher. For these disturbances to grow into a tropical cyclone, the following environmental conditions must be in place: Warm ocean waters (at least 80°F/27°C). Tracking tropical cyclones is a constantly evolving science. The Saffir-Simpson scale assesses storms based on wind strength and divides them subsequently into five categories. The warm, moist air over the ocean rises upward from near the surface. Tropical cyclones are like giant engines that use warm, moist air as fuel. Nearly all of the earth’s ocean basins produce similar tropical storms, called hurricanes, typhoons, or cyclones in different areas. How do tropical cyclones form? In North America and the Caribbean they are called "hurricanes", in the Indian Ocean they are called "cyclones", and in Southeast Asia they are called "typhoons." Hurricanes form over the warm ocean water of the tropics. Different methods include using satellites and radar, and reconnaissance aircraft. How do we measure and classify such a monstrous tempest? That is why they form only over warm ocean waters near the equator. … Tropical cyclones go by different names in different places. 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