Weather Forecastingx

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Transcript Weather Forecastingx

WEATHER FORECASTING
Cold Front
What type of weather does this front bring?
• Cooler temperatures
• clouds
• precipitation (quick, intense, and more localized
storms)
• wind
Warm Front
What type of weather does this front bring?
•
•
•
•
Warmer temperatures
Clouds
precipitation (longer lasting and spread out)
wind
Warm Front and Cold Front Video
http://www.youtube.com/watch?v=huKYKykjcm0
Weather Symbols
L
Low Pressure
- Cloudy skies
- Steady precipitation
- Counterclockwise rotation of air
H High Pressure
- Clear/Sunny skies
- Calm weather
- Clockwise rotation of air
Warm and Cold Fronts
Warm and Cold Front Clip
How do weather patterns generally move across the United States?
Why?
Weather fronts move from the west to the east because the prevailing
winds are from the west (Prevailing Westerlies).
Wind symbols
No wind - Calm
Winds 25 miles per hour to the east
• Full line- 10 miles per hour
• Half line – 5 miles per hour
• Arrow – direction wind is going
Weather Instruments
Barometer
Rain Gauge
Hygrometer
Anemometer
Wind Vane
Sling Psychrometer
Barometer
Measures atmospheric air pressure
Rain Gauge
Used to measure the amount of liquid
precipitation in a set amount of time.
Sling Psychrometer
Measures humidity (water vapor in the air) using a
wet thermometer and dry thermometer.
Wind Vane
Used to measure wind direction
Anemometer
Used to measure wind velocity/speed
Hygrometer
Used to measure moisture content in the
atmosphere (humidity)