ABSTRACT
Since weather is an important parameter in the determination of transmission line ampacity, the development of weather models of ambient temperature, wind speed, wind direction, and solar radiation are presented in this chapter. These are statistical weather models based upon time-series analysis and National Weather Service forecasts. Hourly values of future meteorological conditions from 1 to 24 hours ahead, or even up to 1 week in advance, are now becoming possible due to developments in weather forecasting.
