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Starlink 6-99 - L-1 Day
Falcon 9
Valid Period
Dec 17, 2025 12:19 - 16:19 UTC (07:19 - 11:19 ET)
Issued
Tue Dec 16, 2025 at 14:00 UTC (09:00 ET)
Forecast Discussion
Space Launch Delta 45
High pressure over the southeastern states will persist before the next cold front is expected to pass through by Friday. No change to the primary launch window forecast, with low chances of Cumulus Cloud Rule violation associated with isolated onshore-moving low-topped coastal showers. For the backup day, there is a higher chance of constraint violation as a mid-level trough in the Gulf moves eastward bringing a surge of moisture over central FL ahead of the front, with the Cumulus Cloud and Thick Cloud Rules being the primary concerns.
Primary Launch Date
Launch Day
Primary Window
85%
Primary Concerns
- Cumulus Cloud Rule
Additional Risk Criteria
| Criteria | Risk Level |
|---|---|
| Upper-Level Wind Shear | Low |
| Booster Recovery Weather | Low-Mod |
| Solar Activity | Low |
Backup Opportunities
24-Hour Delay
Backup Window
80%
Primary Concerns
- Cumulus Cloud Rule
- Thick Cloud Rule
Additional Risk Criteria
| Criteria | Risk Level |
|---|---|
| Upper-Level Wind Shear | Low |
| Booster Recovery Weather | Low |
| Solar Activity | Low |