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Starlink 10-31 - L-2 Days

Falcon 9

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Valid Period

May 21, 2026 09:26 - 13:26 UTC (05:26 - 09:26 ET)

Issued

Tue May 19, 2026 at 14:00 UTC (10:00 ET)

Forecast Discussion

Space Launch Delta 45

Forecast Discussion: An Atlantic surface high pressure nosed over southeast US continues to drive our local weather pattern. This feature will promote gentle to moderate east to southeasterly flow leading up to the day of launch. Despite this flow promoting moisture advection from the Atlantic, peak rain chances will be focused inland during the afternoon hours while the sea breeze boundary is displaced away from the east coast. A stalled-out disturbance over the Bahamas is helping supply this moisture and may also generate some convection in the early morning hours. These showers and associated clouds will be our main concern for violation of weather constraints on both the main and backup windows with focus on the Cumulus Cloud Rule.

Primary Launch Date

Launch Day

Primary Window

85%
PGO

Primary Concerns

  • Cumulus Cloud Rule

Additional Risk Criteria

CriteriaRisk Level
Booster Recovery WeatherLow
Solar ActivityLow

Backup Opportunities

24-Hour Delay

Backup Window

85%
PGO

Primary Concerns

  • Cumulus Cloud Rule

Additional Risk Criteria

CriteriaRisk Level
Booster Recovery WeatherLow
Solar ActivityLow