It Was A What?

So, sat on my patio last night with a glass a wine and watched the storm. It was beautiful the way the lightning intertwined with the towers.  Only found out later that there was a tornado bouncing around parts of the city.  Don’t they have sirens for this sort of thing? It would not do to be swept off the patio and found clutching a glass of merlot a quarter of a mile away.  Thanks NOAA.