The National Weather Service (NWS) provides alert and warning information through official dissemination sources, including NOAA Weather Radio, NOAA Weather Wire Service, and Weather.gov to the public, and the iNWS service for core partners (emergency management community, government partners of an NWS office, or members fo the electronic media who need direct interaction with NWS).  The National Weather Service does not provide direct email/SMS alerts to the general public. 

The weather website is http://www.weather.gov/subscribe