Forecasting the Weather 6/8/16

Weather Forecast  Prediction of weather conditions over the next 3 to 5 days  Meteorologist: person who observes and collect data on atmospheric conditions  Why Important?  Severe weather warnings  Travel plans  Daily attire

Forecasting Technology  Thermometer  Tool used to measure air temperature  Air temperature increases liquid expands and rises  Air temperature decreases liquid shrinks and falls

Forecasting Technology  Barometer  Instrument used to measure air pressure  Glass tube sealed at one end in a container full of mercury  Air pressure increases higher the mercury rises

Forecasting Technology Windsock Wind vane  Measures wind direction  Cone-shaped bag open at both ends  Wide end points into wind  Measures wind direction  Arrow with a large tail and attached to a pole  Arrow points into wind

Forecasting Technology  Anemometer  Instrument used to measure wind speed  Wind pushed on hollow sides of cups causing rotation  Generates electric current that is measured on a dial

Forecasting Technology  Psychrometer  Instrument used to measure relative humidity  Calculated by finding difference between wet and dry temperature readings

Forecasting Technology Radar Weather Balloons  Instrument used to find the location, movement, and intensity of precipitation  Balloons equipped with electronic equipment to measure weather conditions