Eastern Range Operation Forecast Op Number: F2342 Issued: 31 May 2002/1700 EDT Valid: 3 June 2002 45 Weather Squadron web site: Vehicle/Payload: STS-111 (Endeavour)/ISS UF-2 Location: CX 39A Launch Weather Officer: Kathy Winters Synoptic Discussion: KSC will again have a sea breeze by late morning generating an easterly flow. 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. Additionally, upper level wind flow will be strong from the west-southwest resulting in a threat of anvil clouds from inland thunderstorms. Clouds Coverage Bases (feet) Tops (feet) Cumulus 2/8 SCT 3500 7000 ALTOCUMULUS 3/8 SCT 10000 13000 CIRRUS 6/8 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: 70% 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: 60% Probability of KSC weather prohibiting Tanking: 0% Primary concern(s): Thunderstorms vicinity. Sunrise: 3 Jun 0625 EDT Moonrise: 4 June 0245 EDT Illumination: 39% Sunset: 3 Jun 2017 EDT Moonset: 4 June 1444 EDT Next Forecast will be issued: Sunday, 2 June 2002/12:00 EDT