yee@trident.arc.nasa.gov (Peter E. Yee) (04/30/91)
[As you know by know, Discovery enjoyed a successful launch -PEY]
TO: PIOS/PRESS
FROM: George Diller/NASA-KSC
407-867-2468/FTS 823-2468
Launch Complex 39
L-2 Day Weather Forecast for STS-39
Conditions expected on Sunday, 4/28/91
Synopsis: High pressure will be located east of Cape Canaveral
in the Atlantic Ocean and a high pressure ridge will dominate the
weather over Florida. The only significant weather concerns are
a chance of ceilings below 8,000 feet, and a chance of trajectory
through precipitation.
At 7:01 a.m. on Sunday morning conditions are forecast to be:
Clouds: 2,500 to 4,000 scattered stratocumulus (50% sky cover)
28,000 to 30,000 scattered cirrus (25% sky cover)
Visibility: 7+ miles
Wind - Pad 39A: SE at 12 knots, gusting to 18 knots
Temperature: 72 degrees
Dewpoint: 69 degrees
Humidity: 90%
Precipitation: slight chance of showers
Probability of launch weather criteria violation at the beginning
of the launch period: 30%
Probability of launch weather criteria violation over the
duration of the launch period: 20%
Probability of tanking constraint violation: 0%
Chance of violation at launch time on Monday: 40%
overall window 30%
Tuesday: 50%
overall window: 30%
Developed by Cape Canaveral Forecast Facility
USAF Air Weather Service 4/26/91