Downpour is a retexture mod for the rain in The Elder Scrolls V: Skyrim to make it look heavier. A new texture with much higher resolution (256x256 pixels instead of the vanilla 32x128) has been provided by the author. A performance friendly version is also available on the Nexus page.
To test whether this mod has been successfully installed, open the console and type sw 10a23c. Then press enter and close the console again.