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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.coursehero.com/file/p76b75k/in-Florida-b-in-the-Central-Plains-c-in-the-Ohio-Valley-d-in-the-middle

The most frequent time of day for tornadoes to form is in the: a. early morning just after sunrise b. late morning just before noon c. evening just after sunset d.

www.weather.gov/media/bis/TStorms_Tor_Lightning.pdf

Waterspouts are tornadoes that form over warm water. Water spouts can move ... Tornadoes can occur at any time of day, any day of the year. □ Have a plan of .... Lightning fatalities are most common during summer afternoons and evenings.

www.nsf.gov/discoveries/disc_summ.jsp?cntn_id=135631

Jul 22, 2015 ... ... form more often during the warmest time of day--the "heat of the day," from mid- day to ... The sun heats the land unevenly during the day, and when the heating from the ... Bluestein: Thunderstorms are most likely to form when the ... Tornadoes, however, while possible, occur much less frequently at night.

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

Interactive Tornado Map! ... Tornado WunderPhotos: View More Tornado Photos. Global Tornado Map ... Where do tornadoes most often occur in the United States ? ... However, tornadoes have occurred in every month and at all times of the day ... Tornadoes form under a certain set of weather conditions in which three very ...

www.mcc.co.mercer.pa.us/dps/SevereWeather.htm

Severe thunderstorms and tornadoes occur most often in the spring months of ... But tornadoes have occurred in every hour of the day and night, so no time of day is ... When these conditions come together, severe thunderstorms form and with .... wind events remain much more common than tornadoes in Pennsylvania.

www.livescience.com/28668-tornado-season-facts.html

Apr 11, 2013 ... Tornadoes can happen anywhere, any time of year. ... Though this setup is most common over Tornado Alley, it can happen anywhere that ...

wxdude.com/Severe.html

But as you mentioned, most occur in the central part of the nation. ... What time of year are tornadoes common in Florida? .... Since many severe thunderstorms do form late in the day, and many tornado-producing thunderstorms also contain ...