Alan wake crashes when tornado spawns

What video card do you have?

Have you tried the following steps?

Verify your Steam cache
- Open up your Steam library
- Right-click on Alan Wake and choose Properties
- Go to the Local Files tab and choose "Verify integrity of game cache".

Update DirectX
Ensure your copy of DirectX is updated to the latest version:
Download Link

Other easy steps...
Particularly if you have problems launching the game, or get errors like DEVICE_CREATE_ERROR - Invalid Call.
Delete resolution.xml from c:\users\<userid>\documents\Remedy\AlanWake and try again
Test if the game runs in a window. Enter -w1280 -h720 -window to Steam's Alan Wake Properties->Set Launch Options
Try starting the game with -nosound parameter

Source: http://community.remedygames.com/showthread.php?t=9000&goto=newpost

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