The 49th annual Labor Day Liftoff hot air balloon festival kicked off at Memorial Park in Colorado Springs this weekend.

The balloons are launching off this morning.

Weather canceled Saturday's launch and glow; another balloon glow is set for Sunday night. And one more launch is planned for Monday morning.

Balloon flights depend on safe conditions. High winds, low cloud ceilings, poor visibility, rain, thunder or lightning can ground launches. Organizers say weather conditions require:

Winds under 8 mph at the surface

Clear skies with at least 5 miles of visibility

No rain, thunder or lightning

Cloud cover is evaluated the morning of each launch

Here’s a look at Sunday’s schedule:

Sunday morning: Lift Off

5:15 a.m. — Park and concessions open

6 a.m. — Drone show

7 a.m. — Balloo

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