MOSCOW, April 11 (RIA Novosti) - Up to 12 military aircraft will disperse clouds to ensure good weather over Red Square during Victory Day celebrations in Moscow on May 9, an Air Force spokesman said on Friday.

Employing techniques perfected over decades, Moscow authorities plan to use environmentally friendly and harmless chemicals to clear clouds and prevent rain. Last year the Russian Air Force dispersed clouds above the city using dry ice, silver iodide and cement powder.

Colonel Alexander Drobyshevsky said "the most experienced An-12, Il-18 and An-26 crews" would be used to guarantee good weather in the Russian capital.

The weather regime will start on May 7, and preparations will begin from May 5, Drobyshevsky added.

Victory Day marks the capitulation of Nazi Germany to the Soviet Union in the Second World War. The conflict is commonly referred to as the Great Patriotic War in Russia.

More than 30 military aircraft are due to fly over Red Square during the May 9 military parade which will see a display of the country's most advanced weaponry, such as BMP-3 infantry fighting vehicles, BTR-80 armored personnel carriers, T-90 tanks, and Topol-M intercontinental ballistic missile mobile launchers.

The Air Force will be represented by Tu-160 Blackjack and Tu-95 Bear strategic bombers, Su-34 Fullback fighter-bombers, MiG-31 Foxhound interceptors, An-124 Condor heavy-lift transport planes and helicopters of various types.

Cloud seeding causes an intensive crystallization process which produces ice crystals that are normally dispersed hundreds of meters from the target area.