Starlink-L27 - L-1 Day
Falcon 9
Valid Period
May 9, 2021 05:42 - 07:34 UTC (01:42 - 03:34 ET)
Issued
Sat May 8, 2021 at 12:00 UTC (08:00 ET)
Forecast Discussion
High pressure continues to move across the southeastern US. Slightly cooler and drier air has begun to overspread the area. There will likely be scattered cumulus clouds later this afternoon and evening. Another storm system is developing over the south central US which will begin to increase winds slightly over the area as it develops this weekend. Winds over the Space Coast as well as the recovery area look to be on the light side. The overall threat for a delay looks to be small but the main weather concern for the primary day will be from the Cumulus Cloud Rule. In the event of a delay, the storm system over the central US moves into the Mississippi Valley late Sunday into early Monday morning. As this happens, the surface pressure gradient tightens and this will cause winds to increase. This will occur both at the Space Coast as well as the recovery area. As with late Saturday/early Sunday, expect scattered cumulus clouds. The primary weather concerns for Monday morning are the Cumulus Cloud Rule as well as Liftoff Winds.
Primary Launch Date
Primary Window
Primary Concerns
- Cumulus Cloud Rule
Additional Risk Criteria
| Criteria | Risk Level |
|---|---|
| Upper-Level Wind Shear | LOW |
| Booster Recovery Weather | LOW |
| Solar Activity | LOW |
Backup Opportunities
Backup Window
Primary Concerns
- Cumulus Cloud Rule
- Liftoff Winds
Additional Risk Criteria
| Criteria | Risk Level |
|---|---|
| Upper-Level Wind Shear | LOW |
| Booster Recovery Weather | MOD |
| Solar Activity | LOW |