50 free Thunderstorms trivia questions with answers — science & nature quiz, new questions added Aug 2026.
Thunderstorms trivia for weather nerds, storm chasers, science teachers and anyone who counts the seconds between the flash and the bang. The quiz starts with the anatomy of a storm: the cumulus, mature and dissipating stages, the anvil-topped cumulonimbus, updrafts and downdrafts, and why single-cell storms fizzle in half an hour while a supercell can spin for hours. Then it covers the hazards and the records: hail and Cheyenne's title as North America's hailiest city, bow echoes and derechos, the Enhanced Fujita scale, downbursts and flash floods, thunderstorm asthma, the 2,000 storms happening on Earth at any moment, Kampala and Singapore's claims to be the most thunderous places, and Venezuela's everlasting Catatumbo lightning. Later rounds turn to lightning itself, air heated to 30,000 °C, 44 flashes a second worldwide, fulgurites, red sprites, the Empire State Building's 23 hits a year, Roy Sullivan's seven strikes, Franklin and Diviš, and the gods from Zeus to Thor and Indra who once got the blame. Questions run from easy to expert, and every answer was checked against a reference page and carries its source. See also our weather, tornadoes, hurricanes and clouds quizzes.
30 of 50 questions with answers and explanations. Play the quiz
Q 01Thunderstorms occur in which type of cloud?
Cumulonimbus
The towering clouds can reach heights of more than 20 kilometres.
Q 02What is the first phase of a thunderstorm's life cycle called?
The cumulus stage
Moisture is lifted by thermals, converging winds or rising terrain and condenses into towering cumulus.
Q 03What gives a mature thunderstorm cloud its characteristic anvil shape?
Air spreading out at the tropopause
The resulting cloud is called cumulonimbus incus.
Q 04What marks the mature stage of a thunderstorm?
Both an updraft and a downdraft at once
Turbulence at this stage brings strong winds, severe lightning and even tornadoes.
Q 05How long does a typical single-cell thunderstorm last?
20-30 minutes
Without wind shear the downdraft cuts off the inflow and the storm 'rains itself out'.
Q 06What atmospheric ingredient allows a storm to become a long-lived supercell?
Vertical wind shear
Shear separates the downdraft from the updraft so the mature stage can sustain itself for hours.
Q 07What is the rotating updraft inside a supercell called?
A mesocyclone
Supercells can be 24 kilometres wide and their anvils can punch into the stratosphere.
Q 08What proportion of supercells produce severe weather, according to research?
At least 90 percent
Most tornadoes come from this type of storm.
Q 09Which is the most common type of thunderstorm development?
Multi-cell clusters
Each cell may last 20 minutes but the cluster can persist for hours.
Q 10A squall line that bulges outward on radar is called what?
A bow echo
The bulging section is where strong straight-line winds are most likely.
Q 11What name is given to fast-moving summer bow echoes that race across large areas?
Derechos
The word is Spanish for 'straight', for the straight-line winds they bring.
Q 12In the US, a thunderstorm is classed as severe if its winds reach at least what speed?
93 km/h (58 mph)
Hail of 25 mm or more, or a reported funnel cloud, also qualifies.
Q 13Mesoscale convective systems bring the US Great Plains roughly what share of their warm-season rain?
About half
Most of these storm complexes form overnight and last into the next day.
Q 21What is a waterspout, technically?
A tornado over water
Most are non-supercell tornadoes and are commonest in the tropics.
Q 22What happens when a thunderstorm's downdraft hits the ground and spreads out?
A downburst
The sudden shift in wind speed and direction is a serious danger to aircraft.
Q 23What triggers the medical phenomenon known as 'thunderstorm asthma'?
Pollen grains bursting into tiny fragments
Pollen grains absorb moisture, burst into tiny pieces and slip past the nose's filters into the lungs.
Q 14What colour tint sometimes signals a thundercloud capable of producing hail?
Green
Hail is also commoner along mountain ranges, where orographic lifting strengthens updrafts.
Q 15Which city is North America's most hail-prone, with nine to ten hailstorms a season?
Cheyenne, Wyoming
It sits in 'Hail Alley', where Colorado, Nebraska and Wyoming meet.
Q 16The largest US hailstone by circumference and length fell in 2003 in which state?
Nebraska
It came down at Aurora.
Q 17Hail can seriously damage aircraft within seconds once stones exceed what diameter?
13 mm (0.5 in)
Wheat, corn, soybeans and tobacco are the crops most sensitive to hail.
Q 18Which European country is singled out for its frequent hail?
Croatia
Mountainous northern India, meanwhile, recorded one of history's deadliest hailstorms in 1888.
Q 19What is the strongest category on the Enhanced Fujita tornado scale?
EF5
An EF5 rips buildings from their foundations; the TORRO scale runs to T11.
Q 20How wide is a typical tornado?
About 75 metres
Most have winds of 40 to 110 mph and travel a few kilometres before dying.
Q 24Roughly how many thunderstorms are occurring on Earth at any given moment?
2,000
They can happen even in polar regions, but tropical rainforests see them almost daily.
Q 25Which two Ugandan places have been called the most thunderous on Earth?
Kampala and Tororo
Singapore and Bogor on Java make the same claim.
Q 26In summer, air-mass thunderstorms are an almost daily occurrence in which US state?
Florida
The West Coast, by contrast, sees relatively few thunderstorms.
Q 27The energy released by a typical thunderstorm is compared to what?
The Hiroshima atomic bomb
Around 500 million kilograms of water vapour condense, releasing about a thousand trillion joules.
Q 28What exotic particles has NASA's Fermi observatory detected being produced in thunderstorms?
Antimatter positrons
They form in terrestrial gamma-ray flashes, of which about 500 may occur daily.
Q 29Which field research project used 'Doppler on Wheels' radar trucks to study tornadic storms?
VORTEX2
Storm chasers head to the Great Plains and Canadian Prairies every spring.
Q 30Which Norse god's hammer blows were believed to cause thunder and lightning?
Thor
The Greeks blamed Zeus, and some Native American tribes the Thunderbird.