Explanation:

- Weather forecasting requires powerful and fast processing to handle complex calculations and vast datasets. Supercomputers are designed for this type of high-performance task.

- Option:2, Supercomputer - These machines have immense computational power, making them ideal for simulating climate models and predicting weather patterns.

- Option:1, Embedded computer - These are small, specialized systems built into other devices, not suitable for the massive scale of weather forecasting.

- Option:3, Mainframe - While powerful, mainframes are traditionally used for large-scale business transactions and data processing, not typically for complex weather simulations.

- Option:4, Workstation - These are high-performance personal computers, more powerful than a typical PC, but not enough for comprehensive weather forecasting.