The aerosynoptic situation on June 12, 2025, was determined by the influence of the northern periphery of developing cyclone, the center of which was moving from Kyiv through Bryansk to the Tula region. During the night and morning, the main precipitation zone associated with its atmospheric fronts was located 100-200 km southwest of Moscow and moved north at a speed of 35-40 km/h. In the morning (06:00-12:00 AM), stratiform cloud cover with a cloud top of 6-7 km (Fig. 1) was observed in the Moscow region without significant precipitation.

Based on the meteorological situation and in accordance with the flight plan, a Roshydromet Yak-42D laboratory aircraft (board number 42440) was launched  from 06:30 AM Moscow time to monitor the meteorological situation and measure atmospheric and cloud parameters, as well as Russian Aerospace Forces An-26 aircraft (board number 28, 37, and 29), which seeded the clouds with packages of powdered reagents and liquid nitrogen. Due to the expected development of convective clouds as a result of warming, four more aircraft were launched from 10:30 to 12:00 AM Moscow time to replace the previously dispatched aircraft: three An-26 (board number 25, 90374 and 50) and An-12 (board number 14).

After 12:00 Moscow time, cumulonimbus clouds with top up to 6-7 km began to form 50-100 km south of Moscow, producing precipitation and moving to north and northwest at speeds of 35-40 km/h. By 16:00 PM, individual cumulonimbus clouds reached heights of 8-9 km (Fig. 2), and thunderstorms were observed within the clouds, according to weather radar data.

Due to the intensification of convective cloud cover, four additional aircraft were scrambled from 12:00 to 16:00 PM Moscow time: three An-26 (No. 08, No. 90373, No. 37) and a Roshydromet Yak-42D laboratory aircraft (number 42440). They were then replaced by three more An-26 (No. 29, No. 25, No. 50). The aircraft conducted series of seeding by powdered reagent, pyrotechnic cartridges and liquid nitrogen until 21:30 PM Moscow time in the south and southwest of Moscow at distance of 30-120 km, and then monitored the meteorological situation.

Aerial weather protection operations in Moscow on June 12, 2025 were completed, as agreed with the Customer, at 9:30 PM Moscow time. During the operations 15 aircraft were conducted on this day and no precipitation was recorded in the city.