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Synoptic Discussion: "A cold front will move through Central Florida Thursday causing isolated showers and significant cloud cover through the launch window. The probability of KSC weather prohibiting launch increased to 60 percent due to the significant low-level moisture expected with the front. High pressure behind the front will migrate over the Eastern US, increasing the pressure gradient over Central Florida causing launch wind and Shuttle Landing Facility (SLF) crosswind concerns.
"Our primary concern for launch day is a low cloud ceiling."
Clouds: Stratus few at 1,500 feet with tops at 2,500 feet and 1/8ths sky coverage; Stratus broken at 3,000 feet with tops at 4,000 feet and 5/8ths sky coverage; Altostratus broken at 6,000 feet with tops at 8,000 feet and 5/8ths sky coverage; and Cirrus broken at 20,000 feet with tops at 22,000 feet and 5/8ths sky coverage
Visibility: 7 miles
Launch Pad Winds: North-northwesterly from 340 degrees at 15 gusting to 22 knots
Temperature: 58 degrees F
Relative Humidity: 77 percent
Weather: None
Probability of Violating Weather Constraints: 60 percent
Concerns: Low cloud ceiling
Times of note
Thursday's launch window: 9:31-9:41 p.m. EST Thursday's target liftoff time: 9:35:45 p.m. EST
Friday's launch window: 9:08-9:18 p.m. EST Friday's target liftoff time: 9:13:13 p.m. EST
Saturday's launch window: 8:42-8:52 p.m. EST Saturday's target liftoff time: 8:47:31 p.m. EST
Forecast for 24-hour delay
Friday's Probability of Violating Constraints: 70 percent Concerns: Low cloud ceiling, isolated showers, winds at launch pad 39B and crosswinds at Shuttle Landing Facility
Forecast for 48-hour delay
Saturday's Probability of Violating Constraints: 60 percent Concerns: Low cloud ceiling, isolated showers, winds at launch pad 39B and crosswinds at Shuttle Landing Facility
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The crew emblem for the final space shuttle mission is now available in our store. Get this piece of history!
This beautiful one piece set features the Apollo program emblem surrounded by the individual mission logos.
The final planned flight of space shuttle Discovery is symbolized in the official embroidered crew patch for STS-133. Available in our store!
This embroidered patch commemorates the 30th anniversary of the Space Shuttle Program. The design features the space shuttle Columbia's historic maiden flight of April 12, 1981.
The official patches from Apollo 1, the shuttle Challenger and Columbia crews are available in the store.