Launch day weather forecast for STS-111
Eastern Range Operation Forecast Op Number: F2342 Issued: 29 May 2002/0700 EDT Valid: 30 May 2002 45 Weather Squadron web site:
Vehicle/Payload: STS-111 (Endeavour)/ISS UF-2
Location: CX 39A
Launch Weather Officer: Kathy Winters
Synoptic Discussion: The weak low pressure system currently located off the east coast of North Florida will gradually move west-northwest and weaken, but will not be the main factor affecting launch. Low level winds at KSC will be light from the west-southwest until the sea breeze begins late in the morning, generating a southeasterly flow at KSC. With plenty of moisture available in the atmosphere, the low-level convergence caused by the interaction of the Florida sea breezes will generate thunderstorms in the center portion of the state. These storms will move towards the east after development causing concerns for launch including anvil clouds and lightning.
Clouds Coverage Bases (feet) Tops (feet)
Cumulus 3/8 SCT 3500 7000
ALTOCUMULUS 4/8 SCT 10000 13000
CIRRUS 5/8 BKN 25000 28000
Visibility: 7
Wind: 14010 P 14 kt (60 foot pad winds)
Temperature: 78 F RH: 85% Dewpoint: 72 F
Weather: TSTMS VICINITY
Probability of KSC weather prohibiting launch: 60%
Probability of KSC weather prohibiting Tanking: 10%
Primary concern(s): Thunderstorms vicinity.
Probability of KSC weather prohibiting launch for 24 hour delay: 70%
Probability of KSC weather prohibiting Tanking: 10%
Primary concern(s): Thunderstorms vicinity.
Probability of KSC weather prohibiting launch for 48 hour delay: 70%
Probability of KSC weather prohibiting Tanking: 10%
Primary concern(s): Thunderstorms vicinity.
Sunrise: 30 May 0626 EDT Moonrise: 29 May 2339 EDT Illumination: 81%
Sunset: 30 May 2015 EDT Moonset: 30 May 1009 EDT
Next Forecast will be issued: 30 May 2002 / 0700 EDT
