Weather Information

Weather forecasts help people plan their days and plan for particular meteorogical conditions. A popular weather site is Weather Underground.

Here in Los Angeles one might not only plan for small temperature changes but also for unusual/inclimate situations, such as a rain storm in the middle of summer or unusualy warm days in fall.

1. Temperature: A measure of heat energy in the air driven by uneven solar heating of the Earth.
2. Air Pressure: The weight of the atmosphere. High-pressure systems bring clear skies, while low-pressure systems cause rising air, clouds, and storms.
3. Wind: Air movement caused by pressure differences as warm air rises and cool air sinks.
4. Humidity: The amount of moisture or water vapor in the air. Warm air holds more moisture than cold air.Precipitation: Condensed water vapor such as rain, snow, or sleet that falls when air cools to its dew point.

The study of ancient weather began thousands of years ago when early civilizations tracked celestial movements, seasonal changes, and animal behavior to predict atmospheric conditions.