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CRS-23 - L-2 Day

Falcon 9

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Valid Period

Aug 28, 2021 07:32 - 07:42 UTC (03:32 - 03:42 ET)

Issued

Thu Aug 26, 2021 at 12:00 UTC (08:00 ET)

Forecast Discussion

Space Launch Delta 45

The mid-level disturbance that brought thunderstorms, heavy rain, and gusty winds to the Space Coast during the overnight and morning hours will pass to our northwest later today, with mid-level ridging building back over the southeastern US by tomorrow. High pressure at the surface centered off the coast of the Carolinas will allow for a deep southeasterly flow regime Friday into Saturday morning, keeping ample moisture in the region. This set-up favors onshore-moving coastal showers in the overnight hours, but mild instability should help limit their growth and subsequent thunderstorm potential. A disturbance located just south of Jamaica this morning is expected to move into the Gulf over the weekend. While it will not directly impact east central Florida, it will usher in mid and upper level moisture into our area, introducing the potential for a mid-level cloud deck. Because of this and the scattered coastal showers, the primary concerns for the launch window on Saturday morning are the Cumulus Cloud Rule, the Flight Through Precipitation constraint, and the Thick Cloud Layers Rule. For the back-up window on Sunday morning, we remain in a similar pattern with continued onshore flow. The aforementioned tropical system will likely continue to develop in the Gulf, but there still remains some uncertainty as to its exact strength and location. This will have a large impact on our chance of showers as well as the mid to upper level cloud decks. Thus, the primary concerns remain the same as on Saturday with a slightly lower probability of violation.

Primary Launch Date

Launch Day

Primary Window

50%
PGO

Primary Concerns

  • Cumulus Cloud Rule
  • Flight Through Precipitation
  • Thick Cloud Layer Rule

Additional Risk Criteria

CriteriaRisk Level
Upper-Level Wind ShearLow
Booster Recovery WeatherLow
Solar ActivityLow

Backup Opportunities

24-Hour Delay

Backup Window

60%
PGO

Primary Concerns

  • Cumulus Cloud Rule
  • Flight Through Precipitation
  • Thick Cloud Layer Rule

Additional Risk Criteria

CriteriaRisk Level
Upper-Level Wind ShearLow
Booster Recovery WeatherLow
Solar ActivityLow