Cloud Formation • Clouds form when warm moist air rises, expands and then cools • When the air reaches the LCL (lifted condensation level) the air condenses and forms a cloud
Temperature Change • An air mass will cool about 10 degrees C for every 1000 meters increase in altitude • When an air mass reaches it’s condensation temperature it is said to have reached its Lifted Condensation Level(LCL)
Dew Point • Dew point is the temperature to which air must be cooled to reach saturation (condensation) • Saturation is the point at which the air holds as much water vapor as it possible can
Humidity • Humidity is the amount of water vapor in the air • Relative Humidity is the ratio of water vapor in a volume of air relative to how much water vapor that volume of air is capable of holding
Cloud Classification • Clouds are classified based on their height: ▫ Strato-Refers to Low Clouds(Below 2000 meters) ▫ Alto-Refers to middle clouds(2000 -6000 meters) ▫ Cirro-Refers to high clouds(Above 6000 meters)