The balloon test flight will launch from Wanaka Airport on a potentially 100-day journey.
Officials are keeping an eye on trajectory projections, but the forecast surface and low-level winds looking good for an early launch attempt between 9am and 11am.
Flight preparations are underway and real-time and forecast weather conditions are being monitored today.
Wanaka Airport officials say local residents and visitors will have the best vantage points from the Hawea Flat side of the Clutha River, on top of Mount Iron and on the hill on the Hawea side of the Red Bridge by Kane Rd.
The launch can be tracked in the following ways: