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Meterology and Weather Tools

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Victoria McCallion

on 10 March 2014

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Transcript of Meterology and Weather Tools

Meteorology and Weather Tools
presented by Victoria McCallion

The Hygrometer was invented by Cardinal Nicholas de Cusa in 1450. It measures relative humidity which is the amount of water vapor there is in the air. It is measured on a percentage scale. One type of hygrometer is the sling psychrometer. It uses one dry and one wet bulb thermometer to measure the air humidity.
As you can see, there are many weather tools available to help meteorologists forecast the weather. From the information collected from these tools, and by looking at similar patterns in the past, they try to predict the weather. Of course, this still is no guarantee since only Mother Nature knows for sure!
An anemometer measures wind speed and records it in miles per hour. They are usually made of cups that spin in the wind. The wind is caught in the cups which turns a dial that is connected to it. The dial will indicate the wind speed. Some anemometers will also have a wind vane with it. The wind pressure will point the vane's weighted arrow to the wind's direction, North, South, East or West. A compass is also another weather tool that tells you wind direction.

Advanced Meteorology Weather Tools
Weather Balloons
measure the weather conditions high in the atmosphere.
Weather Maps

provide information about atmospheric conditions.
Weather Satellites
are used to track big air distrurbences. Computer data and pictures are collected to be analyzed.
Doppler Radar
measures the changes in sound frequency to determine the wind.

The weather, we plan our daily lives around it for things such as what to wear for the day. Will it be warm enough to go to the beach? Will it be rain-free for the family picnic tomorrow? We even sometimes want to know if there will be enough snow from the snowstorm to cancel school? We look to meteorologists who study the science of weather to help answer these questions. What helps them, are numerous important weather tools, many that date as far back as the 15th Century.

The first thermometer dates back to Galileo Galilei in the 1596. A thermometer measures the temperature of the air in Celsius or Fahrenheit degrees. There is a tube filled with liquid such as mercury or alcohol inside of it. This liquid will expand when it heats up and will contract as it gets colder.
The barometer was invented in 1643 by Italian scientist Evangelista Torricelli. It measures the changes in air pressure that often happen before big storms. High pressure usually means sunny weather and low pressure, can mean rain. The measurement is recorded in millibars.

A compass is used to determine the direction of the wind. It helps to navigate you and is used by standing towards the wind. You line up the North line with the needle and it will show you which direction is North, South, East and West.
A compass is used to help you navigate by showing which direction the wind is coming from. If you stand towards the wind and line up the North line, you will see which direction is North, South, East, West, NW, NE, SW, and SE.
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