http://www.spc.noaa.gov/products/watch/

Current Convective Watches (View What is a Watch? clip)
Updated:  Sun Apr 19 12:24:07 UTC 2015

Tornado Watch #78 Issued/Updated: Apr 19, 2015 at 1203 UTC Expires: Apr 19, 2015 at 1900 UTC Tornado Watch 78 Status Message has not been issued