Tornadoes are least common in winter and autumn.
Tornadoes have occurred in all 50 states. However. Most tornadoes happen in or near the area known as tornado alley, which extends north from Texas to South Dakota and includes parts of some adjacent states.
Yes, tornadoes can and do happen at night. In fact, nighttime tornadoes can be particularly dangerous because they are harder to see and may catch people off-guard while they are sleeping. It is important to have multiple ways to receive weather alerts, especially during nighttime hours.
Yes, tornadoes can happen at night. While they are more common during the afternoon and evening, tornadoes can still form after dark. Night-time tornadoes can be particularly dangerous as they may be harder to see and receive warnings for.
The majority of UK tornadoes are not recorded. So most statistics on the number of recorded tornadoes in the UK are usually around 70. Most UK tornadoes happen in the countryside (so don't get noticed) and are very small (usually). It is common belief that more tornadoes happen in the UK than in the US (tornado ally included) - Although US tornadoes are way bigger and stronger than those in the UK and so more are likely to be noticed and therefore recorded. Tornadoes in the UK usually happen in the summer when the weather conditions are right.
Antarctica
Tornadoes are least likely to form in association with a warm front, though it can happen.
Yes in every state. Not all states have violent tornadoes but all states have reported at least a few weak tornadoes, even Alaska and Hawaii.
Tornadoes can happen in any place that gets thunderstorms.
Tornadoes do not happen as frequently during winter or fall, with the lowest activity (at least in the U.S.) occurring in January and December. They mostly occur during the spring and summertime of April, May, and June.
Tornadoes happen in Miami for the same reason they happen anywhere else. See the related question for how tornadoes form in general.
Tornadoes can happen in Ottawa. Canada does get tornadoes, though not as often as the U.S. due to its cooler climate.
Tornadoes can happen anywhere in the world except cold areas like Antarctica and the north pole. Tornadoes are mostly common in United States.
Yes. Tornadoes, including some significant ones, can and do happen the the Philippines.
Tornadoes happen in the summer every year.
Most tornadoes in the U.S. happen in spring and early summer.
Tornadoes can happen anywhere - they're usually formed from severe thunderstorms.