http://www.stormcam.org/radio-noaa/

How will I know if there is a tornado warning in the middle of the night?
Now my zone subjected to a moderate risk to severe weather, with a growing risk of tornadoes. they are forecasting thunderstorms 2 pm and 8 pm, when I sleep. My city has a siren tornado, but I doubt it is strong enough inside my house to awaken me, and I do not have a NOAA weather radio.
These sirens are very loud … They will be able to wake up. xD If you really doubt, stay all night. Find something to do. : D
NOAA Weather Radio – Severe Weather Warnings