NASA has delayed the launch of a spacecraft to Mars until Tuesday because of a cold front bringing strong wind, thick clouds and rain to Florida.

The front was expected in the area by early Monday, when the Mars Pathfinder was supposed to lift off on an unmanned Delta rocket. Forecasters predicted a 95 percent chance of poor weather.

Nasa on Sunday rescheduled the launch for 2:03 a.m. Tuesday, when much better weather is expected.

Pathfinder, which contains a lander and the first-ever Martian rover, is scheduled to arrive at the Red Planet on July 4, 1997. NASA’s Global Surveyor spacecraft, launched on Nov. 7, is en route to Mars.