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AST Bluebird 7 - L-1 Day

New Glenn

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Valid Period

Apr 19 - Apr 20, 2026

Issued

Sat Apr 18, 2026 at 10:45 UTC (06:45 ET)

Forecast Discussion

Space Launch Delta 45

Forecast Discussion: Surface high pressure will continue mainly dry weather through early Sunday afternoon. The ridge axis will weaken and get suppressed south as a front moves across Central Florida late Sunday. Generally favorable launch weather conditions are anticipated ahead of the front, with a combination of shallow cumulus clouds and higher cirrus clouds locally early Sunday; however, the backup launch opportunity offers a significantly higher risk of unacceptable launch weather conditions with the front in the neighborhood and winds increasing behind the boundary. Isolated showers and thunderstorms are also possible during the back up launch opportunity.

Primary Launch Date

Launch Day

Primary Window

90%
PGO

Primary Concerns

  • Cumulus Cloud Rule
  • Thick Cloud Layers Rule

Additional Risk Criteria

CriteriaRisk Level
Solar ActivityLow

Backup Opportunities

24-Hour Delay

Backup Window

50%
PGO

Primary Concerns

  • Liftoff Winds
  • Cumulus Cloud Rule
  • Thick Cloud Layers Rule

Additional Risk Criteria

CriteriaRisk Level
Solar ActivityLow