Forecaster (noun)

1. A person who predicts future events or conditions, especially the weather.
2. An expert in meteorology who predicts the weather based on observations and data analysis.

Origin:

From forecast + -er, meaning "one who forecasts.".

Examples:

1. The forecaster predicted rain for the next few days, much to the relief of farmers.
2. The forecaster's skill was put to the test during the severe storm season.
3. The forecaster made a mistake, predicting clear skies when a tornado was actually on the way.
4. The forecaster was famous for his accurate predictions, and was sought after by the media.
5. The forecaster was a specialist in computer modeling, using complex algorithms to predict the weather.