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Forecasting Weather
• Although models are useful tools in the forecasting
process, subtle factors not included in the models
can have a large impact on the weather.
• These factors include such things as urbanization.
Urbanization is the fact that cities are warmer due to
buildings and other man-made materials that absorb
and hold heat that vegetation does not.
– Urbanization can cause heat waves that the computer
models cannot forecast
– Urbanization can cause a cold rain in the city while
surrounding suburbs receive several inches of snow.
• Forecasters use their knowledge of the local area
weather patterns to modify the predictions they
receive from the computer models.