NASA will again try to launch its super-pressure balloon from Wanaka on Tuesday morning.
Previous scheduled launches have been stymied by uncooperative weather. It was originally supposed to take to the skies on April 3.
The fragile balloon, large enough to hold a football stadium, needs perfect conditions to take off without being damaged.
Low-level winds tomorrow are "aligned for an early launch attempt", somewhere between 8am and 11:30am.
NASA says the best views are from the Hawea Flat side of the Clutha River, atop Mt Iron and on the hill on the Hawea side of the Red Bridge, by Kane Rd.