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== Related phenomena == {{multiple image|direction=horizontal|align=center |image1=Tourbillon de neige.png |total_width=800 |caption1=Snow [[Whirlwind (atmospheric phenomenon)|whirlwind]] or devil, similar to a dust devil, seen on Mount Royal in [[Montreal]], Canada |image2=Superb coal devil in Mongolia - 1.JPG |caption2=Coal devil in [[Mongolia]] |image3=Lages Wildfire in White Pine County, Nevada.JPG |caption3=An ash devil. The fire was in the Schell Creek and Antelope Mountain ranges. }} === Ash devils === Hot cinders underneath freshly deposited ash in recently burned areas may sometimes generate numerous dust devils. The lighter weight and the darker color of the ash may create dust devils that are visible hundreds of feet into the air. Ash devils form similar to dust devils and are often seen on unstable days in burn scar areas of recent fires. Coal devils are common at the [[coal town]] of Tsagaan Khad in [[Ömnögovi Province|South Gobi Province]], [[Mongolia]]. They occur when dust devils pick up large amounts of stockpiled coal. Their dark color makes them resemble some tornadoes. === Fire whirls === {{main|Fire whirl}} Fire whirls or swirls, sometimes called fire devils or fire tornadoes, can be seen during intense fires in combustible building structures or, more commonly, in forest or bush fires. A fire whirl is a vortex-shaped formation of burning gases being released from the combustible material. The genesis of the vortex is probably similar to a dust devil's. As distinct from the dust devil, it is improbable that the height reached by the fire gas vortex is greater than the visible height of the vertical flames because of turbulence in the surrounding gases that inhibit creation of a stable boundary layer between the rotating/rising gases relative to the surrounding gases.<ref>[http://jfsp.nifc.gov/conferenceproc/GISRS-12-AORadkeetal.pdf Wildfire Modeling, IR Observations and Analysis] {{webarchive|url=https://web.archive.org/web/20070327183634/http://jfsp.nifc.gov/conferenceproc/GISRS-12-AORadkeetal.pdf |date=2007-03-27 }}</ref> ===Hay devils=== A "hay devil" is a gentle whirlwind that forms in the warm air above fields of freshly-cut [[hay]]. A vortex forms from a column of hot air rising from the ground on calm, sunny days, tossing and swirling stalks and clumps of hay harmlessly through the air, often to the delight of children and onlookers.<ref>{{cite news |author=<!--not stated-->|date= 5 July 2019|title= Hay devil' whirlwinds spotted in field near Bristol|url= https://www.bbc.com/news/av/uk-england-bristol-48882596|work= [[BBC News]]|location= London|access-date=22 April 2023}}</ref><ref>{{cite news |last1= Lumley|first1= Sarah|last2= Taylor|first2= Michael|date= 10 July 2018|title= Gigantic 'hay devil' whirlwind rips through field in Somerset countryside|url= https://www.mirror.co.uk/news/uk-news/gigantic-hay-devil-whirlwind-rips-12887453|work= [[Daily Mirror]]|location= London|access-date= 22 April 2023}}</ref><ref>{{cite news |author=<!--not stated--> |date= 10 July 2017|title= Hay devil caught on video in Oregon|url= https://www.wtvy.com/content/news/Hay-devil-caught-on-video-in-Oregon-433560233.html|work= [[WTVY (TV)|WTVY News 4]] (NBC News Channel)|location= Dothan, Alabama|access-date= 22 April 2023}}</ref> ===Snow devils=== The same conditions can produce a ''snow whirlwind'', ''snow devil'', or sometimes referred to as a "snownado", although differential heating is more difficult in snow-covered areas.<ref>{{cite web|url=https://cloudatlas.wmo.int/en/snow-devil.html |title=Snow Devil |publisher=[[World Meteorological Organisation]] |access-date=2023-01-11}}</ref> === Steam devils === {{main|Steam devil}} Steam devils are a small vortex column of saturated air of varying height but small diameter forming when cold air lies over a much warmer body of water or saturated surface.<ref>{{cite web|url=https://cloudatlas.wmo.int/en/steam-devil.html |title=Steam Devil |publisher=[[World Meteorological Organisation]] |access-date=2023-01-11}}</ref> They are also often observed in the steam rising from [[power plant]]s.<ref name="Handy Weather Answer Book">{{cite book |last=Lyons |first=Walter A. |title=The Handy Weather Answer Book |location=Detroit, MI |publisher=Visible Ink Press |year=1997 |isbn=0-7876-1034-8 |url-access=registration |url=https://archive.org/details/handyweatheransw00lyon }}</ref> {{Clear}}
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