Mammatus Cloud Formation — Great Plains USA
Mammatus clouds — hanging pouch-like lobes of ice crystal and water droplet cloud, formed on the underside of cumulonimbus anvils during the most powerful thunderstorm systems — reach their finest development over the American Great Plains during tornado season from April through June, when the storm systems that produce them are most intense and most frequent. The southern Plains from Oklahoma City to Wichita produce the largest and most dramatic mammatus displays, observable in the 30–45 minutes before a supercell's anvil passes overhead — the clouds' hanging pouches illuminated by the storm's internal lightning in pink, gold, and grey against an otherwise blue sky. Storm chasers who position below the anvil's forward edge regularly capture the finest mammatus photography available, and the combination of the Great Plains' flat unobstructed sky and the extreme storm systems creates the world's finest atmospheric observation theatre.
About this spectacle
Standing beneath a retreating supercell's anvil on the southern Great Plains, visitors witness one of meteorology's most arresting spectacles: hundreds of rounded, pouch-like lobes hanging from the cloud base like a vast inverted bubble wrap, stretching across the sky from horizon to horizon. The mammatus form on the underside of the cumulonimbus anvil and glow pink, amber, and deep gold as the storm's internal lightning illuminates them from within — while the sky behind remains blue or violet. The window is brief, typically 30 to 45 minutes as the anvil's forward edge passes overhead. The Great Plains' flat, treeless terrain provides an unbroken 360-degree sky canvas unavailable in most of the world. Storm chasers position their vehicles ahead of the anvil to maximise the viewing angle; even casual observers parked on a rural highway can experience the full overhead canopy. The spectacle is accompanied by distant thunder, freshening winds, and the electric stillness that precedes major convective weather.
When to go
Apr — Jun
Getting there
Nearest airport: ICT. Nearest city: Wichita.
Booking options
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