According to the National Oceanographic and Atmospheric Administration, hurricanes form when heat from calm, warm seas rises into a cooling atmosphere, generating a tropical system. The rising moisture causes the forming... More »

Hurricanes form over the Atlantic or Pacific Ocean near the Equator when the surrounding water is at least 80 degrees Fahrenheit, according to SciJinks. The term "hurricane" typically refers to tropical storms in the Wes... More »

On the Pacific coast of Mexico, hurricane season begins May 15. Along Mexico's Atlantic coastline, hurricane season begins on June 1. On both coasts, the official hurricane season ends on November 30. More »

www.reference.com Science Weather & Tides Weather Seasons

Hurricanes form when rising warm, moist air displaces colder air high in the atmosphere. The cold air drops down on all sides of the warm spot, swirling slightly as it falls, then becomes warm and moist itself, repeating... More »

www.reference.com Science Weather & Tides Storms

Hurricanes are caused by the convection currents set up when warm, calm seas heat up the air above the ocean's surface. As the warm, moist air rises, it is replaced by cooler air spiraling down from higher in the atmosph... More »

www.reference.com Science Weather & Tides Storms

The minimum sustained wind speed required for a tropical storm system to be classified as a hurricane is 74 mph, but tropical cyclones have been recorded with wind speeds as high as 215 mph. However, only tropical system... More »

Signs of a hurricane begin about 36 hours before landfall and include changes in wind patterns, cloud cover and precipitation. As the storm approaches, the intensity of these changes increases. Meteorologists are aware o... More »