1. open the map with the weather
2. find the sbsp with the weather and decompile recursively.
3. decompile the map you want to add to.
4. open h2g and find the sbsp the weather came from.
5. copy weather palette chunk
6. open sbsp without weather
7. find the weather palette chunk - hit new then insert and then delete the 2nd chunk.
8. find the clusters(visual clusters) and in each chunk is an index to the weather palette set to -1. since we only have 1 chunk in our palette. we would reference 0.