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Understanding Weather

Understanding Weather. Carin Miranda Smyrna Middle School Winter 2013. Water in the Air. Evaporation is when water changes from a liquid to a gas. When air reaches its dew point relative humidity is at 100% . Clouds. Nimbostratus clouds will bring light to heavy continuous rainy weather.

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Understanding Weather

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  1. Understanding Weather Carin Miranda Smyrna Middle School Winter 2013

  2. Water in the Air • Evaporation is when water changes from a liquid to a gas. • When air reaches its dew point relative humidity is at 100%

  3. Clouds • Nimbostratus clouds will bring light to heavy continuous rainy weather. • Cumulonimbus clouds are large thunderstorm clouds that produce precipitation. • Altocumulus clouds are puffy mid-level clouds. • Cirrus clouds are high clouds made of ice crystals.

  4. Precipitation • Sleet-Starts as rain then freezes in the air. • Snow-Water vapor changes directly into a solid because of cold temperatures. • Hail-Forms when precipitation is sent back up into the clouds many times.

  5. Air Masses • Continental polar (cP) dry and cold • Maritime polar (mP) wet and cold • Continental tropical (cT) dry and warm • Maritime tropical (mT) wet and warm • C=dry • P=cold • M=wet • t-=warm

  6. Fronts • Warm front-warm air moves over cold air and replaces it. • Stationary front-Not moving. Brings many days of cloudy, wet weather. • Cold front-cold air mass displaces a warm air mass. • Occluded front-warm air mass is caught between two cold air masses and is forced to rise. Lots of precipitation.

  7. Meteorology • Images of weather systems on television come from weather satellites. • From a weather map you can tell the locations of cold and warm fronts. • The lines connecting points of equal pressure on weather maps are called isobars. • Isobars help meteorologists by showing areas of high and low pressure.

  8. Vocabulary • Humidity • Air mass • Front • Barometric pressure • Meteorologist • Psychrometer

  9. Vocabulary 2 • Thermometer • Barometer • Anemometer • Rain Gauge • Wind Vane • Wind

  10. Vocabulary 3 • Hygrometer • Weather • Relative Humidity • Condensation • Cloud • Precipitation

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