It's not that issue, I am sure of it.
TropiCraft says it is updated to 1.4.3, but it's not, look here:
http://tropicraft.net/p/v4-0-4a-yay-more-bug-fixes-and-some-news/
If you look at the first "paragraph" you'll see it says that it says it's for 1.4.3 but it is not, and he was originally going to release it for 1.4.3 but since Jeb postponed the release, he just updated (for 1.4.2).
WeatherMod is supposedly updated, look here:
http://tropicraft.net/downloads/
If you go down to the "Written Instructions" and on 5. and 6. it says both of those mods are for 1.4.2 in the latest version of TropiCraft (4.0.4a), as you can see I got those two mods from the TropiCraft download (it's included in the .zip if you read that) so I doubt he would release an update if those weren't for 1.4.2.
Anyone else wanna give a shot at it? Thanks,
~neonhights