Felicity Lanchester,Felicity Lanchester / Cloud iridescence forming above a cumulonimbus cloud, caused by light refraction through individual water droplets and ice crystals at high altitude, Sierra Leone.

Juan Carlos Munoz / Rain falling from cumulonimbus clouds over the sea, Bahamas, Caribbean

Jim Brandenburg / Prairie under threatening thunder clouds, South Dakota

Jim Brandenburg / Cloudy sky over tallgrass prairie, Wind Cave National Park, South Dakota

Juan Carlos Munoz / Coastal village under cloudy sky. Inisheer, Aran Islands, County Galway, Republic of Ireland. May 2011.

Graham Eaton / Storm clouds (cumulonimbus) building over Minera Moors, with Heather (Calluna vulgaris) in bloom, near Wrexham, Wales, UK, August, August.

Pascal Tordeux / Cumulonimbus clouds above Oilseed rape (Brassica napus) field, Picardy, France, April 2016.

Pascal Tordeux / Baie de Somme / Bay of the Somme with Cumulonimbus clouds, France, April 2016.

Pascal Tordeux / Country track with dark cumulonimbus clouds above, Surfontaine, Picardy, France, March 2016.

Alex Hyde / Detail of Cumulonimbus cloud at sunset. Nordtirol, Austrian Alps. July.

Alex Hyde / Detail of Cumulonimbus cloud at sunset. Nordtirol, Austrian Alps. July.

Tim Fitzharris / Giant cumulonimbus clouds, near Des Moines, New Mexico

Tim Fitzharris / Giant cumulonimbius cloud and rainbow, Sierra Grande, near Capulin, New Mexico

Tim Fitzharris / Giant cumulonimbius cloud, Sierra Grande shield volcano, near Cauplin, New Mexico

Aflo / Y-2906 Sun shining and clouds

Aflo / Y-3104 Sun shining behind clouds

Aflo / Y-3006 Sun shining behind clouds

Aflo / Y-3004 Sun shining behind clouds

Aflo / Y-3101 Sun shining behind clouds

Aflo / Y-3603 Cumulus clouds in blue sky

Aflo / Y-1005 Cumulonimbus clouds in blue sky above sea

Aflo / Y-1002 Cumulonimbus clouds in blue sky with sun shining above sea

Aflo / Y-3501 Cumulonimbus clouds in blue sky

Aflo / Y-3201 Cumulonimbus clouds in blue sky

Aflo / Y-3302 Cumulonimbus clouds in blue sky

Aflo / Y-3506 Cumulonimbus clouds in blue sky

Aflo / Y-1004 Cumulonimbus clouds in blue sky over sea surface

Aflo / Y-3203 Cumulonimbus clouds in blue sky

Aflo / Y-3505 Cumulonimbus clouds low in blue sky

Aflo / Y-6304 Cumulonimbus clouds behind trees

Aflo / Y-3204 Cumulonimbus clouds in blue sky

Aflo / Y-3502 Cumulus clouds in blue sky

Aflo / Y-3301 Cumulus clouds in blue sky

Aflo / Y-3205 Cumulus clouds in blue sky

Aflo / Y-3304 Cumulus clouds in blue sky

Aflo / Y-3305 Cumulus clouds in blue sky

Aflo / Y-3405 Cumulus clouds in blue sky

Aflo / Y-2804 Cumulonimbus clouds over Pacific Sea, Hawaii, USA

Onne van der Wal / Cumulonimbus rainclouds at sunset, Exumas, Bahamas, Carbbean. June 2009.

Yva Momatiuk & John Eastcott / Rainbow and cumulonimbus clouds above fall tundra, Denali National Park, Alaska

Yva Momatiuk & John Eastcott / Cumulonimbus clouds above fall tundra, Denali National Park, Alaska

Juan Carlos Munoz / Rain falling from cumulonimbus clouds over the sea, Bahamas, Caribbean

Flip Nicklin / Rain falling from cumulonimbus storm clouds over the ocean, Shark Bay, Australia

John Cancalosi / Cumulonimbus Clouds, Arizona, USA

Jim Brandenburg / Landscape of rippling sand, Namib Desert, Namibia

Simon Cox / Cumulonimbus clouds at dawn above Norwest Arch, Ben Ohau Range, Southern Alps, New Zealand

Jim Brandenburg / Prairie under threatening thunder clouds, South Dakota

Benjamin Olson / Cumulonimbus cloud over Lake Superior, Duluth, Minnesota

Yva Momatiuk & John Eastcott / Cumulonimbus cloud over mountains, Dempster Highway, Yukon, Canada

Yva Momatiuk & John Eastcott / Cumulonimbus cloud over mountains, Dempster Highway, Yukon, Canada

Hiroya Minakuchi / Cumulonimbus clouds over rainforest, Kinabatangan River, Malaysia

Klaus Nigge / Aerial view of tropical storm clouds, Celebes Sea. May, 2007.

Klaus Nigge / Aerial view of tropical storm clouds, Celebes Sea. May, 2007.

Graham Eaton / A developing Cumulonimbus cloud over the countryside near the villages of Burwardsley and Tattenhall, Cheshire, England, UK. October, 2020.