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.
5. Humidity: The amount of moisture or water vapor in the air. Warm air holds more moisture than cold air.
6. Precipitation: Condensed water vapor such as rain, snow, or sleet that falls when air cools to its dew point.

Weather forecasting or weather prediction is the application of science and tehcnology to predict the conditions of the atmosphere for a given location and time. People have attempted to predict the weather informally for thousands of years and formally since the 19th century. Weather forecasts are made by collecting quantitative data about the current state of the atmosphere at a given place and using meteorology to project how the atmosphere will change. Once an atmospheric model is created, computer programs can help generate a forecast. The inaccuracy of forecasts is due to the chaotic nature of the atmosphere, limited data, and an incomplete understanding of atmospheric processes.