Twister in the Yukon

'This photo was taken near to Kluane Lake Research Station in the Yukon, Canada. It depicts a large, cone-shaped, funnel cloud. A funnel cloud forms when water droplets are drawn in from the surrounding area by a rotating column of wind, making a region of intense low pressure visible to the human eye. Most tornados begin as funnel clouds. However, this funnel cloud never made contact with the ground and therefore could not be classified as a tornado.'

Laren Marchant

The photo was taken with the iPhone 6 rear camera which is the 8 megapixel (f2.2, 1.5micron, 1/3 sensor) with autofocus and enhanced using Adobe Photoshop (Photoshop: I turned down the highlights -15, and turned up the contrast +20).