Orange snow

Saratov is a major port (population over 800,000) on the Volga River, 858 km (533 miles) from Moscow, and has a moderate (for Russia) climate with an annual snowfall of about 163 centimeters (64 inches) which, until now, has never been orange.
The orange snow was widespread and of various shades of orange along with patches of yellow and brown. Saratov’s residents were rightly skeptical to avoid eating snowflakes or jumping in the juice-colored banks until finding out what caused it. The most likely reason, according to Saratov weather forecast service director Mikhail Boltukhin, was a cyclone that blew colored sand from Africa’s Sahara desert into Siberian snow clouds.

http://mysteriousuniverse.org/2015/02/mysterious-orange-snow-falls-on-russian-town/