25.3 weather instruments winds are always labeled from the direction from which they blow. wind vane...
TRANSCRIPT
25.3 Weather InstrumentsWinds 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
Weather BalloonsMeasuring Upper - Atmospheric conditions
Doppler RADARRadio wave pulses
Particles of water bounce back
Weather Satellites
El Niño and La NiñaNew Text p. 546-547
El Niño - Normally cold offshore waters are replaced by unusually strong warm equatorial waters (Read p. 546)
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.
Normal conditions
25.4 Forecasting the Weather
www.projectsharetexas.org/node/12016
How to read weather maps:www.youtube.com/watch?v=bd7DcVnrSL8
IsobarsIso = equalBar = 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 page 534 in your Text. Learn the symbols.
Interpret the maps!