Tornadoes can also happen at any time of day or night, but most tornadoes occur between 4–9 p.m. ... A Tornado WATCH is issued by the NOAA Storm Prediction Center meteorologists who watch the weather 24/7 across the entire U.S. for weather conditions that are favorable for tornadoes and severe weather.

What percentage of tornadoes occur at night?

Making up only about 27% of all tornadoes, nocturnal events were responsible for 39% of tornado deaths and 42% of killer tornadoes in that 55-year period.

How can you tell if a tornado is coming at night?

Many tornadoes are wrapped in heavy precipitation and can't be seen. Day or night - Loud, continuous roar or rumble, which doesn't fade in a few seconds like thunder. Night - Small, bright, blue-green to white flashes at ground level near a thunderstorm (as opposed to silvery lightning up in the clouds).