Forecasting Weather After completing this section, students will analyze weather maps and the...
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![Page 1: Forecasting Weather After completing this section, students will analyze weather maps and the resulting regional weather (Standard PI – 061)](https://reader034.fdocuments.us/reader034/viewer/2022042821/56649d435503460f94a1f00c/html5/thumbnails/1.jpg)
Forecasting Weather
After completing this section, students will analyze weather maps and the resulting regional weather
(Standard PI – 061)
![Page 2: Forecasting Weather After completing this section, students will analyze weather maps and the resulting regional weather (Standard PI – 061)](https://reader034.fdocuments.us/reader034/viewer/2022042821/56649d435503460f94a1f00c/html5/thumbnails/2.jpg)
To prepare accurate weather forecasts, meteorologists must gather, distribute
and analyze huge amounts of atmospheric data
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Weather data can be collected by:
• Satellites
• Weather Balloons and Radiosondes
• Weather Stations
• Weather Radar
• Airplanes and Ships
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Satellite images provide weather information about about every
spot on the Earth
Meteorologists use 2 kinds of satellite images, visible images and infrared images
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Visible satellite images are black and white pictures of the Earth
White colors represent clouds or snow, grey represents land and black is water
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By tracking the movement of clouds, meteorologists can estimate wind speed and direction and track storms
One disadvantage of visible satellite images is that they are not available at
night
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Infrared satellite images use temperature to create
pictures
Infrared images can be taken day or night
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Bright areas represent cold temperatures and cold high tops
of clouds
Dark colors represent warmer temperatures and low clouds
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By looking at cloud height (as represented by color)
meteorologists can determine the severity of a storm
The taller the cumulonimbus clouds, the stronger the storm
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Radiosondes – an instrument pack attached to a balloon which carries it up into the atmosphere
Meteorologists use radiosondes to measure temperature, humidity and pressure at different
altitudes
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Information from radiosondes can be used to predict how air
masses might move
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Weather Stations
A device for measuring temperature, air pressure, dew point, wind speed and
direction and precipitation
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Only by analyzing data from weather stations can meteorologists decide
where in a storm it is raining, or snowing
Weather station report conditions about every hour
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Station Models (Modelo de estación)
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Using the data they get from weather stations,
meteorologists create weather maps
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To fit large amounts of data onto a compact map, scientists have
developed the station model
A station model includes information on temperature, dew point, weather
conditions, wind speed and direction
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Making a Surface Weather Map
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It takes several steps to make a surface weather map
First a computer draws a map showing station models connecting areas of equal air pressure (isobars) and temperature
(isotherms)
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Meterologists then draw in fronts based on where low
pressure systems are located
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Modern-day weather forecasts are based on computer models
They use observed data such as, temperature, wind speed and direction,
and plug it into a mathematical equation to make predictions