yee@trident.arc.nasa.gov (Peter E. Yee) (04/26/91)
TO: PIOS/PRESS
FROM: George Diller/NASA-KSC
407-867-2468/FTS 823-2468
Launch Complex 39
L-4 Day Weather Outlook 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 concern is a
chance of violation of the launch pad wind constraint.
At 7:01 a.m. on Sunday morning conditions are forecast to be:
Clouds: 700 to 1,000 scattered stratus
28,000 to 31,000 scattered cirrus
Visibility: 7+ miles
Wind - Pad 39A: S at 12 knots, gusting to 20 knots
Temperature: 72 degrees
Dewpoint: 69 degrees
Humidity: 90%
Precipitation: none expected
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: 10%
Probability of tanking constraint violation: 5%
Chance of violation at launch time on Wednesday: 30%
(overall window 10%)
Thursday : 50%
(overall window 30%)
Developed by Cape Canaveral Forecast Facility
USAF Air Weather Service 4/24/91