HURRICANES

What is a Hurricane?

A hurricane is a type of tropical cyclone, the general term for all circulating weather systems over tropical waters (counterclockwise in the Northern Hemisphere). Tropical cyclones are classified as follows:

- Tropical Depression: An organized system of clouds and thunderstorms with a defined circulation and maximum sustained winds of 38 mph (33 knots) or less.
- Tropical Storm: An organized system of strong thunderstorms with a defined circulation and maximum sustained winds of 39 to 73 mph (34-63 knots).
- Hurricane: An intense tropical weather system with a well defined circulation and maximum sustained winds of 74 mph (64 knots) or higher. In the western Pacific, hurricanes are called "typhoons," and similar storms in the Indian Ocean are called "cyclones."

Hurricanes are products of a tropical ocean and atmosphere. Powered by heat from the sea, they are steered by the easterly trade winds and the temperate westerlies as well as by their own ferocious energy. Around their core known as the "eye" winds grow with great velocity, generating violent seas. The "eye" is generally 20 to 30 miles wide, and the storm may extend outward 400 miles. As a hurricane nears land, it can bring torrential rains, high winds, storm surges and spawn tornadoes. A single hurricane can last for more than 2 weeks over open waters and can run a path across the entire length of the eastern seaboard. August and September are peak months during the hurricane season, that lasts from June 1 through November 30. Hurricanes are classified using the Saffir Simpson Scales.

DANGER ZONES

Areas in the United States vulnerable to hurricanes include the Atlantic and Gulf coasts from Texas to Maine, the territories in the Caribbean, and tropical areas of the western Pacific, including Hawaii, Guam, American Samoa, and Saipan

Watch Issued

Hurricane conditions pose a possible threat to your area. In especially vulnerable areas, early evacuation may be necessary when a Watch is issued. Otherwise you should review hurricane safety procedures and take precautionary actions; prepare survival kit, fill car gas tank, cover windows with boards, secure loose objects that may blow away or go under water, leave areas that may flood. When advised, evacuate to public shelters as per instructions. Listen to NOAA Weather Radio and commercial radio and television for the latest information and instructions for your location.

Warning Issued

Hurricane conditions are expected in your area within 24 hours. Areas subject to storm surge or tides should be evacuated as well as areas which could be isolated by flood waters. Follow the instructions of local officials. You will not be asked to leave your home unless your life is threatened. Make final preparations. Listen to radio/TV for instructions. Stay indoors during high winds.

Emergency Response for the Tulane Community

When a serious weather or other emergency threatens New Orleans, the Tulane community needs information fast. In these emergencies Tulane will activate the AlertLine. Students, faculty and staff from all Tulane campuses, as well as patients can call AlertLine or check the Tulane University website during emergencies for up-to-the-minute data on University closings or reopenings and other vital information.

New Orleans 862-8080 Toll free 1-877-862-8080

REMEMBER: Latest storm-related information will be available on NOAA Weather Radio and commercial radio and television. Do not tie up telephone lines by calling local officials or the National Weather Service. Listen carefully to broadcasters serving your immediate area.

A hurricane causes sea level to rise above normal tidal heights, with giant wind-driven waves and strong, unpredictable currents. These are the storm's worst killers.

Tornadoes spawned by hurricanes are extremely dangerous. When a hurricane approaches, listen for tornado watches and warnings, and be ready to take immediate shelter. For information on Tornado's click here.

Here is some helpful information for Evacuating and Disaster Kits

Things to do after a disaster.

Here is a list of Websites related to disasters.