On the afternoon of 24 December 2025, AirVeto’s wind field over eastern Poland showed a cross-border inflow corridor tracking from Belarus into the Podlaskie region, passing directly through the area north of Białystok. Orange border segments along the Polish-Belarusian frontier marked the window in which smuggling balloons released from Belarusian territory could drift into Polish airspace at mid-altitudes.
Overnight and into the morning of 25 December, Polish authorities recovered four airborne objects later identified as likely smuggling balloons, among five contraband finds reported across the Podlaskie region. The Polish Ministry of National Defence reported dozens of airspace violations during the window. The spatial distribution of recoveries matched the predicted corridor.
Illustrative file photo. This image is not from the incident described — it shows a contraband-type balloon of the kind deployed along the Belarusian frontier.
What AirVeto showed at the time
AirVeto's wind layer at 700 hPa (3,000 m) over the Podlaskie region showed an east-to-east-northeast flow across the Polish-Belarusian frontier through the event window. Near Białystok at 22:00 UTC on 24 December, wind was arriving from 56° (east-northeast) at approximately 29 km/h — within the 85° border-normal inflow threshold along the Polish-Belarusian frontier north of Białystok, producing orange border segments across that stretch. Speeds across the Podlaskie region ranged from 24 to 38 km/h and directions from 40° to 91°, with a stronger and more easterly component to the south.
| Wind parameter | Value |
|---|---|
| Altitude | 700 hPa (3,000 m) |
| Time | 22:00 UTC, 24 December 2025 |
| Direction (from), near Białystok | 56° — east-northeast, from Belarus |
| Speed, near Białystok | ~29 km/h |
| Direction range, Podlaskie grid | 40°–91° (ENE to E) |
| Speed range, Podlaskie grid | 24–38 km/h |
| Source | Open-Meteo historical-forecast-api, 700 hPa |
| Border-normal threshold crossed | Yes — multiple segments north of Białystok, 85° |
At 5 km the direction was similar, slightly rotated; at 500 m the boundary-layer wind was lighter and more variable, a useful reminder that the same synoptic setup can move objects differently depending on the altitude they fly at. How AirVeto models that field, its data sources and its known limits are set out on the methodology page.
Why this one matters
This was the first publicly documented event where AirVeto’s wind layer pre-flagged a specific cross-border corridor that was then independently confirmed by a state authority. It established the cadence the archive runs on: publish the wind view in the hours before or after a reported event, anchor it to the primary reporting once it lands, leave it as a time-stamped record anyone can cite.
The same wind-driven inflow across the Polish–Belarusian border went on to produce the 28 January 2026 Vilnius Airport incursion and the run of Lithuanian balloon recoveries collected in the incident archive. Polish-side smuggling-balloon incidents and the wind context behind them are collected at Balony przemytnicze.