How to set the weather effect for the frozen throne in warcraft 3?

1. First open your Warcraft root directory and find the map editor. As shown below.

2. After opening, open the map where the weather needs to be set.

Where are the map files? Under Warcraft3\Maps or other folders in the map.

For example, (2) Ogremount. W3M is already open.

3. After opening, click the red box in the figure to open the trigger.

4. Create a new trigger.

5. Set as shown below, or add other weather effects.

If you set it as shown below, just enter: It will rain heavily if it rains.