Weather

Predicting weather is easy!!!

Instruments

These are the weater instruments. Anemometer – measures the speed or force of the wind. The speed that the cups rotate shows the wind strength. Barometer – measures air pressure. Pressure falls when it is about to rain and rises when the weather is dry. You can see this as the needle moves. Hygrometer – measures the amount of moisture in the air. It usually incorporates a needle that is made to move by a paper strip which shrinks or stretches depending on the dampness of the air ( the humidity).   Rain Gauge – shows how much precipitation (rain, snow or hail) that falls each day.  Rain Gauge – shows how much precipitation (rain, snow or hail) that falls each day.
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Stratus

Stratus clouds are uniform grayish clouds that often cover the entire sky. They resemble fog that does not reach the ground. Usually no precipitation falls from stratus clouds, but sometimes they may drizzle. When a thick fog "lifts," the resulting clouds are low stratus.
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Barometer

A barometer is a piece of scientific equipment that measures atmospheric pressure or air pressure. This helps with the forecasting of the weather. A barometer measures the change in pressure in the atmosphere which occurs when the weather pattern changes. In this way it is able to help in the prediction of whether it will be wet or dry. There are three main types of barometers, mercury barometers, water-based barometers and aneroid barometers.
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Amemometer

An anemometer is a device for measuring wind speed, and is one instrument used in a weather station. The term is derived from the Greek word, anemos, meaning wind. Anemometers can be divided into two classes: those that measure the velocity of the wind, and those that measure the pressure of the wind, but as there is a close connection between the pressure and the velocity and a suitable anemometer of either class will give information about both these quantities.
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Hygrometer

Hygrometers are quite delicate and need to be calibrated for accurate measuring. They are also not instant devices - it can take up to two hours to get an accurate reading or to record changes in the relative humidity.
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Rain gauge

The rain gauge measures the amount of liquid precipitation that falls.  It can measure either rain or, with added steps, the liquid equivalent of snow.  The rain gauge has an outer cylinder, a measuring tube, and a funnel.  The measuring tube measures to a hundredth inch.  When it is full, it contains one inch of rain.  When more than an inch falls, the extra flows into the outer cylinder.  By carefully pouring the rain from the outer cylinder back into the measuring tube, a total rainfall amount can be accurately measured.
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Temperature

Temperature is a measure of the average heat or thermal energy of the particles in a substance. Since it is an average measurement, it does not depend on the number of particles in an object. In that sense it does not depend on the size of it. For example, the temperature of a small cup of boiling water is the same as the temperature of a large pot of boiling water. Even if the large pot is much bigger than the cup and has millions and millions more water molecules
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Weather forcast

Weather is the condition of the atmosphere in a place over a short period of time. Meteorology is the study of the atmosphere, including weather over such time. Because weather affects so many aspects of our life, meteorology is an increasingly important science. The first people to study weather were in ancient times with crude instruments. Rapid communications in the middle of the nineteenth century truly changed weather predicting into more of a science with the ability to get data to make predictions. The first US government weather service was formed in 1870 and today is located in Maryland, with assistance from reports from many stations and substations throughout the country.The instruments used to measure and predict the weather include thermometers to measure heat, barometers to measure air pressure, hygrometers to measure humidity, anemometers to measure wind speed, wind vanes to measure wind direction as well as weather satellites, rockets, radar. Once data is received from the many stations around the country and fed into computers, weather maps are drawn up. These have many isobars - lines that separate areas of high pressure (anticyclones) and low pressure (cyclones). Weather fronts show the beginnings of different air masses - high and dry, high and wet, low and dry and low and wet air masses. Areas of precipitation and cloud cover are indicated as well. Based on the data, weather forecasts are made. Closeness to bodies of water and the topography of the land where a station is located can also be factors in determining what the weather will be like.