Got yourself a Galaxy S III on Verizon and getting annoyed by all those presidential alerts and those about severe weather? No one really wants to wake up at 4 in the morning because of a potential flood 50 miles away. Fortunately, you can now disable all of these.
The severe weather alerts can be disabled from the options provided in the stock ROM itself, as pointed out by XDA Forum Member Inous in this forum thread. Just open the stock Messaging app and from its menu, select ‘Emergency Alerts’. Once there, just uncheck all the alerts that you don’t want, and you’re done.
Unfortunately, there is no built-in option to disable the presidential alerts, as they are buried in the settings file for the messaging app. However, you can just disable the stock Messaging app as you would disable any other stock application (Settings -> Applications -> All -> Messaging, and tapping ‘Disable’). However, if you do this, you should consider loading another texting app such as Handcent or Go SMS to replace the missing functionality.
If you would rather stick with your stock messaging app and still disable the presidential alerts, you can do that—as long as your phone is rooted. The method of doing so was shared with us thanks to XDA Forum Member blazera in this thread.