yee@trident.arc.nasa.gov (Peter E. Yee) (04/22/91)
TO: PIOZ/PRESS FROM: George Diller/NASA-KSC 407-867-2468/FTS 823-2468 Launch Complex 39 L-5 Day Weather Forecast for STS-39 Conditions expected on Tuesday, 4/23/91 Synopsis: A cold front will be located in the western Gulf of Mexico bringing Southwesterly winds. Moisture flowing over land from the Gulf will create the possibility of low cloud ceilings. At 7:05 a.m. on Tuesday morning conditions are forecast to be: Clouds: 800 to 1,000 broken stratus 10,000 to 11,000 scattered altocumulus 28,000 to 31,000 scattered cirrus Visibility: 7+ miles Wind - Pad 39A: SW at 10-15 knots Temperature: 76 degrees Dewpoint: 71 degrees Humidity: 84% Precipitation: None expected Probability of launch weather criteria violation at the beginning of the launch period: 50% Probability of launch weather criteria violation over the duration of the launch period: 30% Probability of tanking constraint violation: 5% Chance of violation at launch time on Wednesday: 50% Thursday : 50% Developed by Cape Canaveral Forecast Facility USAF Air Weather Service 4/19/91