TECHNOLOGIES FOR EARLY DETECTION

It is human nature to prevent bad things occur. However, up to now, scientists cannot find a way to prevent hurricanes. The only thing we can do is to detect hurricanes, plot the path and minimize the possible damages. Using our bare eyes can't detect hurricanes. Therefore, getting information about hurricanes needs special equipment.

Weather forecasters and meteorologists have 2 ways to detect hurricanes: direct and indirect methods.

a. Direct dimensions and speed measurements:

First, aircrafts fly near the hurricane to collect information. Some planes even fly right into the eye of the storm. Second, ships measure the heat of the sea around the storm. Hurricanes often get stronger when moving toward warmer water. Ships near the hurricane also collect information.

These are called reconnaissance aircrafts

b. Indirect observational methods:

Satellites take pictures of the Earth from space. The pictures are taken over a long time, showing the direction and speed of the storm. The colours on satellite pictures of storms help meteorologists to measure temperature and rainfall in different parts of the hurricane and to estimate its strength and course. Besides, doppler radar converts its detection into pictures showing the location and intensity of precipitation and the wind motions in storms.

ASOS Sensor in Salinas, CA (SNS)

ASOS on NWS Headquarters roof in Silver Spring, MD

*ASOS stands for The Automated Surface Observing Systems in USA.

Once a hurricane has been spotted, it is given a name. It is important that people who live in the path of a hurricane get as much warning as possible. People need time to prepare for the hurricane, such as move animals in from farms, cover up their windows, or even get away from the area.

More information about ASOS: http://www.nws.noaa.gov/asos/