Airport in Rostov-on-Don translated into operation on the actual weather conditions due to fog, told RIA Novosti the airport.
"Visibility on the runway is 150 meters (350 feet required), so work on the actual weather," — said the source. He added that while there is no delay the flight.
Fog can form when temperature drops. Yesterday in Rostov air temperature was below zero, now — plus 4 degrees.