SEVERE WEATHER ALERT:

Tuesday, July 05, 2011

Launch Weather Criteria For Space Shuttle



The basic weather launch commit criteria on the pad at liftoff must be:

Temperature:

  • Launch can not take off is 24 hour average temperature has been below 41 degrees.
Wind:
  • The peak wind speed allowable is 30 knots. 
  • When the wind direction is between 100 degrees and 260 degrees, the peak speed varies for each mission and may be as low as 24 knots.
Precipitation:
  • None at the launch pad or within the flight path.
Lightning:
  • Do not launch if lightning has been detected within 10 nautical miles of the pad or the planned flight path within 30 minutes prior to launch.
Clouds: 
  • Direct visual observation of the Shuttle is required through 8,000 feet. This requirement may be satisfied using optical tracking sites or a forward observer
  • the vehicle integrity can be observed without interruption through 6,000 feet.
  • the thickness of the clouds must be less than 500 feet

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