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en.wikipedia.org/wiki/Thunderstorm

A thunderstorm, also known as an electrical storm, lightning storm, or thundershower, is a storm ... Thunderstorms can form and develop in any geographic location but most .... Although a funnel cloud or tornado indicates a severe thunderstorm, .... of general readiness (as a thunderstorm can occur at any time of the day or ...

en.wikipedia.org/wiki/Supercell

A supercell is a thunderstorm characterized by the presence of a mesocyclone: a deep, ... To the extent that records are available, supercells are most frequent in the Great .... LP supercells rarely spawn tornadoes and those that form tend to be weak, ... of a hook echo, when in fact they are producing a tornado at the time.

www.nssl.noaa.gov/education/svrwx101/tornadoes

Because wind is invisible, it is hard to see a tornado unless it forms a ... Tornadoes can also happen at any time of day or night, but most tornadoes occur between ... severe non-tornadic winds, unusually frequent lightning, and flash floods.

www.nssl.noaa.gov/education/svrwx101/tornadoes/faq

Frequently asked questions about tornadoes, from the NOAA National Severe Storms ... to occur in every state in the United States, on any day of the year, and at any hour. ... wind speeds can be as high as 300 mph in the most violent tornadoes. ... Although the process by which tornadoes form is not completely understood, ...

www.spc.noaa.gov/faq/tornado

Feb 13, 2017 ... Most thunderstorms that form under those conditions (near warm fronts, cold fronts and ... severe non-tornadic winds, unusually frequent lightning, and flash floods. ...... What are the time limits of a "tornado day" anyway? In the ...

storm.colorado.edu/~saraht/atoc1050/Lecture_Notes/chapter19-notes.pdf

Scientists have identified three possible methods for tornadoes to form in supercell ... of most frequent tornado ... What time of day are tornadoes most common?

www.weather.gov/cae/tornado.html

Tornadoes are found most frequently in the United States east of the Rocky Mountains. ... Waterspouts are weak tornadoes that form over warm water. Waterspouts are most ... and 9 PM - but tornadoes can occur at any time of day or night!

www.weatherwizkids.com/?page_id=60

Most strong and violent tornadoes form within this area of strong rotation. .... Tornadoes can happen at any time of the year and at any time of the day.

www.wunderground.com/resources/education/tornadoFAQ.asp

Where do tornadoes most often occur in the United States? ... However, tornadoes have occurred in every month and at all times of the day or night. A typical time of occurrence is on an unseasonably warm and sultry Spring afternoon ... Tornadoes form under a certain set of weather conditions in which three very different ...

www.meted.ucar.edu/tropical/synoptic/local_storms/print.php

Weak tornadoes form along boundaries in the low troposphere and are more ..... In India and Bangladesh tornadoes are most frequent during April and May and ... into evening, but tornadoes can occur in any season and at any time of day .