Picture Essay: Winners of WMO Calendar Competition

Cumulonimbus Capillatus Incus Praecipitatio. "The End of Summer," Dubrovnik, Croatia 

Photo by Daniel Pavlinovic

Cumulus Congestus Foreground with Cumulonimbus Capillatus Incus Centre Background. "Before the Storm," Davor, Croatia

Photo by Ivica Brilc

Altocumulus stratiformis opacus duplicatus undulatus, Cirrus uncinus and Cirrostratus. "Layers," Above Cabo Verde

Photo by Anja Costa

Stratus opacus. "Running Above the Clouds," Slovenia

Photo by Zoran Stanko

Altocumulus Asperitas Mamma. "Sky Waves," Panevezys, Lithuania

Photo by Arvydas Latvis

Nacreous cloud. "Iridescent Clouds," Oslo, Norway

Photo by Vessi Ogaard

Altocumulus Stratiformis Translucidus Perlucidus Undulates. "Amazing Waves in the Sky," Simuna, Estonia 

Photo by Kairo Kiitsak

Altocumulus Duplicatus. "Meghaduta - Cloud Messenger," Melbourne, Australia

Photo by Shyamalee Subramanyam

Cumulus Congestus Praecipitatio. "Nature's Power," Bandarban, Bangladesh

Photo by Shamim Shorif Susom

Cumulus Congestus Praecipitatio. "Nature's Power," Bandarban, Bangladesh

Photo by Shamim Shorif Susom

Cumulonimbus Capillatus Incus Praecipitatio Arcus. "Dromana Roll Cloud," Victoria, Australia

Photo by Rosemarie Steiner

Cirrocumulus Stratiformis Homomutatus. "Sunset Sky in Jois," Jois, Austria

Photo by Luka Filipi

Cirrus Fibratus, Uncinus, Floccus and Castellanus. "Cirrus Variations," Livingston County, New York, USA

Photo by Michael Hanna

Cumulonimbus Capillatus Incus Praecipitatio Murus. "Supercell in Kansas," Kansas, USA

Photo by Valentina Abinanti