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SORCE Launch Weather Forecast

Status Report From: Kennedy Space Center
Posted: Thursday, January 23, 2003

Vehicle/Payload PEGASUS / SORCE

Location: Air Launch

Launch Weather Officer: Mike Jennings

Synoptic Discussion:

A strong cold front is expected to move through Cape Canaveral early Thursday bringing strong northerly winds and a chance of rainshowers. Very cold air will follow this front with the possibility of temperatures dropping below freezing on Friday and Saturday morning in the local area. Weather on Saturday looks good for launch, with light northerly winds at the Skid Strip for takeoff of the L1011. Skies are expected to be partly cloudy along the entire flight path of the L1011 prior to Pegasus Drop. A very strong Jet Stream aloft will provide a strong westerly wind at Flight level (39 kft) and a chance of light to moderate turbulence for the L1011. The only slight concern for launch day will be the chance of light with occasional moderate turbulence during L1011 climb out and at flight level (39 kft).

CCAFS Skid Strip at Takeoff (25 Jan/1400L):

  • Clouds Coverage Bases (feet) Tops (feet)
  • Stratocumulus SCT 3/8 3000 3500
  • Cirrus SCT 3/8 25000 26000
  • Visibility: 7 miles +
  • Wind: 350-020 degrees at 8 gusting to 12 knots
  • Temperature: 54 - 56 F Altimeter Setting: 30.26 in
  • Weather: None

Flight Path and Drop Point :

  • Clouds Coverage Bases (feet) Tops (feet)
  • Stratocumulus SCT 2/8 3000 3500
  • Cirrus SCT 3/8 25000 26000

At Flight Level (39 kft):

  • Visibility: 7 miles + (Unlimited)
  • Wind: 260 / 125 KTS
  • Temperature: - 54 C Barometric Pressure: 212 mb
  • Weather: Chance of light to occasional moderate Turbulence at Flight Level (39 kft)

Overall probability of violating weather constraints: 10%

Primary concern(s): Chance of light to moderate Turbulence at Flight Level (39 kft)

Overall probability of violating weather constraints for 24 hour delay: 20%

Primary concern(s): Slight Chance of Rainshowers over the Gulf Stream along the flight path of the L1011

Sunrise: 25 Jan 03 / 0714L EST Moonrise: 25 Jan 03 / 0036L EST

Sunset: 25 Jan 03 / 1757L EST Moonset: 25 Jan 03 / 1209L EST Illumination: 25 %

Next forecast will be issued: 24 Jan 03 / 0800 EST

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