Mute Emergency alert in Google Now (without removing it) Google Now has a neat feature (at least I think it's from Google Now) where it warns you for emergency events. The problem is it's just warned me twice in half an hour with an extremely loud tone about a snowstorm I've known about for days.

Is there some way I can make the phone vibrate or change the ringtone? I only see an option to disable these alerts entirely. It's not my default notification/alarm ringtone; it's a special LOUD warning tone. Good at attracting attention but major overkill. I would like to still get them, but I would like them to be much quieter (yes, even though they're "emergencies") as my phone blaring loud warning tones at work is quite distracting.
If you go to google now, and then go to settings (the three dot menu button if its a soft key) theres a section that says notifications. That section has a part titled Urgent Updates and has the option to set a ringtone or turn on vibrate. As far as I know this should change the sound for the alert since it says urgent updates include public alerts. Just note, I am using KitKat so if you don't have the latest version of google now it could be different. 
EDIT: I just realized this question was asked a year ago so the answer details a newer version