WEATHER

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WEATHER
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WEATHER

• Meteorology
• The study of weather
• Meteorologist is a person who studies and
  analyzes weather.
• Weather is caused by the movement or transfer of
  energy.
• Energy is transferred wherever there is a
  temperature difference between two objects.
• Easy to observe, difficult to explain, and nearly
  impossible to predict accurately.

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WEATHER

• Many weather phenomena result from a transfer of
  energy that occurs via the movement of air in the
  atmosphere.
• This is known as convection
• Air contains vapor from the evaporation of liquid
  sources on the Earths surface.
• When air cools it condenses and released water
  vapor in the form of precipitation.
• This is a brief overview of the water cycle.

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WEATHER

• The physical transfer of heat and moisture
  through the convection process is the basis for
  the formation of many meteorological patterns and
  features including
• Fronts, thunderstorms, tornadoes, depressions,
  etc.

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WEATHER

• Weather is the short-lived condition of the air.
• Short-lived because in some places you could
  experience complete weather patterns in one day.
• Some weather conditions continue for several
  days, weeks, or months.

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What Does Weather Consist Of?

• Temperature
• The measure of the kinetic energy of an object.
• How fast it is moving.
• The more kinetic energy (the faster the particles
  are moving), the higher the temperature
• Measures heat
• The higher the temperature the hotter it is.

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What Does Weather Consist Of?

• Measuring Temperature
• Thermometers
• Measure air temperatures
• Readings are expressed in degrees Fahrenheit
  and/or Celsius (Centigrade)
• Two types
• Mercurial Thermometers
• Not used as often any more because Mercury is
  hazardous
• Alcohol Thermometers

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What Does Weather Consist Of?

• Air Pressure
• How heavy the atmosphere is at any given
  location
• Measured using barometers
• An aneroid barometer is an example.
• Readings are expressed in inches, centimeters, or
  millibars.

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What Does Weather Consist Of?

• Precipitation
• The amount of moisture that is released in
  various forms
• Snow, rain, hail
• Measured
• Using a rain gauge
• Readings are expressed in inches or centimeters

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What Does Weather Consist Of?

• Wind speed
• How fast or slow the wind is moving
• Measured
• Uses an Anemometer to measure wind speed
• Readings are expressed in miles per hour or
  kilometers per hour.

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What Does Weather Consist Of?

• Relative Humidity
• This consists of air quality and amount of water
  vapor.
• How much moisture is in the atmosphere
• Measured
• Uses a psychrometer
• Readings are expressed in percent
• Uses a hygrometer
• Readings are expressed in percent

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What Does Weather Consist Of?

• Other conditions considered
• Cloud Conditions
• Types of clouds present
• Visibility