25.3 Weather Instruments Wind vane – most common, located on

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Presentation transcript:

25.3 Weather Instruments Wind vane – most common, located on Winds are always labeled from the direction from which they blow. Wind vane – most common, located on buildings; always point into the wind. Anemometer – measures wind speed and direction Draw N -0°, E 90°, S 180°, W 270° ; arrow clockwise https://www.youtube.com/watch?v=km8uskqf3kU

Weather Satellites Weather Balloons Doppler RADAR Measuring Upper - Atmospheric conditions Doppler RADAR Radio wave pulses Particles of water bounce back

Normal conditions El Niño and La Niña https://www.youtube.com/watch?v=7FVZrw7bk1w (4:30) El Niño - Normally cold offshore waters are replaced by unusually strong warm equatorial waters El Niña – atmospheric phenomenon when surface temperatures of the eastern Pacific are colder than average; blows cold air over the Pacific NW & plains, but warms the rest of the U.S.

25.4 Forecasting the Weather https://www.youtube.com/watch?v=GkE3F5AuWBQ How to read weather maps: www.youtube.com/watch?v=bd7DcVnrSL8

Isobars Iso = equal Bar = pressure Pressure flows ‘around’ the pressure center counter clockwise around lows clockwise around highs The closer the isobars, the stronger the winds

Low pressure system: Increased clouds, winds, Chance of rain High pressure system: Clear calm conditions with reduced chance of rain. Drier air results in greater range of H and L temps.

Turn to pages 513-514 in your text. Learn the symbols. Interpret the maps!