tornado watch

A tornado watch is a meteorological forecast issued by the National Weather Service (NWS) when conditions are favorable for the development of tornadoes or severe thunderstorms. It alerts the public to a potential threat, covering a broad area, often several counties, and does not pinpoint specific communities that will be affected.1

Tornadoes are violent, rotating columns of air that develop within thunderstorms and touch the ground, typically occurring in spring and summer. Their formation requires specific atmospheric conditions, including cool, dry air aloft over warm, moist air near the surface, along with a veering wind profile and strong upper-level winds, often influenced by the jet stream.234

The NWS uses advanced technology like Doppler radar to detect rotation within thunderstorms, which can indicate the formation of a mesocyclone, a precursor to a tornado. When a tornado is visually spotted or detected by radar, a tornado warning is issued, signifying immediate danger and requiring prompt action.351