Lesson 3'2 Getting Weather Information

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Lesson 3.2- Getting Weather Information

• Simple Weather Tools
• Meteorologists- people who study the weather.
• Barometer- measures air pressure.

2
Simple Weather Tools continued

• Wind vane- measures wind direction.
• Anemometer- measures wind speed.
• Rain gauge- simplest weather tool.
• Hygrometer- used to measure humidity.

3
Simple Weather Tools continued

• Thermometer- measures temperature
• humid air hair expands

4
Modern Instruments

• Meteorologists still use simple weather tools.
• Weather Balloons- carry three meters.
• thermometer
• barometer
• hygrometer

5
Modern Instruments continued

• Satellites- provide images of the Earth its
  atmosphere to the weather center.
• Radar- reports very important information down to
  Earth and sends out radio waves.
• Doppler Radar- different from regular radar
  because it can see precipitation and it detects
  wind speed in clouds.

6
Hurricane Watch!

• Hurricane season lasts between June through
  November.
• Hurricanes are the most destructive storms in the
  world

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Hurricane Watch!Cont

• The National Hurricane Center
• Responsible for finding out where hurricanes are
  beginning to develop.
• They look for heavy cumulus clouds with help from
  satellite photos.
• Radar and Weather stations provide data to center.

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Hurricane Watch Cont

• Hurricane Hunters
• Trained Air Force crews that fly into the eye of
  the center of the storm (eye of the storm) and
  report back to center.
• They measure wind speed, temperature, humidity,
  and pressure.

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Hurricane Watch Cont

• Eye of the Storm
• The center swirl of the storm.
• Inside the eye it is calm and cloud free.
• Tremendous winds surrounding around the eye
  (found in the eye wall) are the most destructive
  winds in a hurricane.
• Reach up to 360 kilometers per hour.
• Deep cumulonimbus clouds and torrential rains.

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Hurricane Watch and Warnings!

• Hurricane Watch
• This is issued when the coastal area appears to
  be in the path of hurricane within the next 24-36
  hours.
• Advises people to be prepared by gathering food,
  batteries, extra supplies etc.

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Hurricane Watch and Warnings!

• Hurricane Warning
• Issued when the coastal area is expected to be in
  the hurricanes path within 24 hrs.
• This warning means that lives are in danger and
  people are advised to evacuate immediately.