During these drills , the National Weather Service issues test tornado warnings , and local Emergency Alert Systems and\/or NOAA Weather Radio ( normally as a Required Weekly Test or Required Monthly Test ; Live Tornado Warning Codes can only be used if a waiver from the FCC is granted since `` Live Code Testing '' is prohibited per regulations ) are activated along with outdoor warning sirens .
During these drills , the National Weather Service gives out test tornado warnings , and local Emergency Alert Systems and\/or NOAA Weather Radio ( normally as a weekly or monthly test ) are sounded , along with outdoor warning sirens .