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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.nssl.noaa.gov/education/svrwx101/thunderstorms

Tornadoes (with winds up to about 300 mph) can destroy all but the best-built ... Three basic ingredients are required for a thunderstorm to form: moisture, rising ... The mature stage is the most likely time for hail, heavy rain, frequent lightning,  ...

www.isws.illinois.edu/atmos/statecli/tornado/04_svrprep_info.pdf

Severe thunderstorms can produce tornadoes, damaging winds, lightning, hail or ... moving thunderstorms, and occur most frequently at night, in mid to late summer. ... If you live in a mobile home, this is the time to move to a .... i Pump out flooded basements gradually (about one-third of the water per day) to avoid structural.

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.coursehero.com/file/p1ojosa/b-lie-down-flat-on-the-ground-c-crouch-down-as-low-as-possible-while-minimizing

Oct 19, 2015 ... 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 ...

www.coursehero.com/file/17665999/Geog115-Jan11-12-review-questionsdocx

Nov 10, 2016 ... 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 ...

lawr.ucdavis.edu/classes/atm10/10sample_final.html

The most frequent time of day for tornadoes to form is in the: ... trough of low pressure found in the tropics and along which hurricanes occasionally form is called:.

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

rain, frequent lightning, strong winds, and ... Tornadoes can occur at any time of day, any day of the year. □ Have a ... Most tornadoes form within this area of ...

www.livescience.com/3589-12-twisted-tornado-facts.html

Jun 18, 2009 ... Twelve facts about when, where and how tornadoes form, as well as ... Although tornadoes are more frequent in the afternoon, they can ... While tornado season — the time of year that historically produces the most tornadoes — runs ... 1974, when a two-day "Super Outbreak" of 147 tornadoes killed 308 ...