METHODS AND INSTRUMENTS USED IN WEATHER FORECASTING

METHODS AND INSTRUMENTS USED IN WEATHER FORECASTING

RADIOSONDE

This is an instrument used to register pressure and temperature from the ground to roughly 12 km above the ground.




The instruments are fixed to balloons filled with helium gas and are released into the atmosphere every day at a particular time from different weather stations.

The radiosonde transmits radio signals to computers on the ground station where they are analyzed.

The signals transmitted give to pressure, temperature, and humidity readings at different altitudes.

These balloons are made in such a way that they burst when they reach a certain altitude.

SATELLITES

The satellites used for predicting weather are human-made. Satellites are large electronic devices that are sent into space.




They move around the earth so that they can provide various types of information.

They are also used in radio, television, and telephone communication. Satellites transmit photographs on weather conditions on daily basis.

The movement of clouds can be predicted from an analysis of the movement of winds for a period of 24 hours.

PERSISTENCE METHOD

This is the simplest way of making a weather forecast. It assumes that the atmospheric conditions of a place at the time of forecast will not change.




For example, if it is 28 degrees Centigrade in Dodoma today, the persistence method predicts that it will still be 28 degrees centigrade in Dodoma tomorrow.

If two inches of rain fell in Arusha yesterday, this method predicts that two inches of rain will fall in  Arusha today.  

 This is the simplest way of making a weather forecast. It assumes that the atmospheric conditions of a place at the time of forecast will not change
Photo by Brett Sayles on Pexels.com

STATISTICAL FORECASTING




In this method, meteorologists ask themselves: How is the weather usually like at this time of the year? They then collect records of average temperatures and rainfall over the last few years.

This gives forecasters an idea of what the weather is ‘’supposed to be like’’ at a certain time of year.




There are other more complex methods of forecasting weather, including the use of computers and other technologies.

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