Ballooning Bulletin
The Ballooning Bulletin is a forecast bulletin in plain language containing specific meteorological information destined for ballooning activities in Belgium: expected surface and upper-air wind, temperature inversions and an outlook. This local forecast bulletin is issued according to the following time table:
| Issue time | Validity Period | Outlook |
|---|---|---|
| 02.30 Z (*) | 1H before and 2H after Sunrise | 12.00 Z - Sunset |
| 05.30 Z (**) | 1H before and 2H after Sunrise | 12.00 Z - Sunset |
| 10.30 Z | 2H before and 1H after Sunset | Next day |
| 15.00 Z (update) (*) | 2H before and 1H after Sunset | Next day |
(*) Summertime period
(**) Wintertime period
