This will take you to the NWS page for storm data. You will have to select the state, dates, and counties you are interested in, then search. In the search results, you can click on location of an event and it will take you to a page with more in-detail data.
This map will show you the approximate location of each outdoor warning siren in the state of Texas. If you click on a specific pinpoint, it will tell you the siren model on the left side of the screen.