Rain and thundershowers in the area of the Kennedy Space Center landing site in Florida caused flight controllers to wave off both of today's opportunities to bring Endeavour home.

Endeavour crewmembers, Commander Ken Cockrell, Pilot Paul Lockhart, and Mission Specialists Philippe Perrin and Franklin Chang-Diaz, and Expedition 4's Yury Onufrienko, Carl Walz and Dan Bursch, were given the word to back out of deorbit preparations about 10:30 a.m. today.

Endeavour has two landing opportunities at KSC Tuesday. The first begins with the firing of Endeavour's braking rockets at 9:47 a.m. and a landing at 10:55 a.m. CDT. A second opportunity for a Florida landing would see the deorbit burn at 11:24 a.m. and a landing at KSC at 12:31 p.m. CDT. Preliminary weather forecasts call for the possibility of clouds and rain showers in the area of the three-mile landing strip on Tuesday.

The Edwards Air Force Base landing site will be activated Tuesday, though KSC remains the preferred landing location. Forecasts for both KSC and Edwards called for questionable weather that could prevent a Tuesday landing. Endeavour has enough consumables on board to remain in orbit until Thursday.

The first of two Tuesday opportunities to land at Edwards would see a deorbit burn at 12:54 p.m. and a landing at 2 p.m. CDT. For the second opportunity, the deorbit burn would begin at 2:32 p.m. with a landing at 3:36 p.m. CDT.

Endeavour completed all major objectives of its STS-111 flight. It rotated station crews, brought more than 9,000 pounds of equipment and supplies to the station, and in three successful spacewalks gave the station's robotic arm, Canadarm2, a mobile base for future station assembly and maintenance work, and replaced its wrist-roll joint.

Crewmembers aboard Endeavour were scheduled to begin a sleep period at 6:23 p.m. and be awakened at 2:23 a.m. Tuesday.

Meanwhile, the ISS Expedition 5 crew - Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev - is still unpacking the supplies and equipment delivered by Endeavour to the station.

The next STS-111 status report will be issued Tuesday morning, or as events warrant.

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