What's the difference between a watch or warning

Warning

A warning is issued because severe weather is expected to occur the next 12-24 hours or could be imminent. 

Watch

A Watch is issued when there is potential for Severe Weather to occur in the next 24-48 hours.

Advisory

An advisory is issued based on a current weather warning or watch which has the potential for hazardous conditions within 6-12 hours.

Current Warnings, Watches, Advisories and Statements