The launch of the Deep Space Climate Observatory, a satellite intended to warn of solar storms shortly before they hit Earth, was postponed on Tuesday because of high-altitude winds at the launch site in Cape Canaveral, Fla.

The next attempt will be at 6:03 p.m. on Wednesday, when forecasts suggested that the weather would be better, with only a 10 percent chance of unfavorable conditions. If delayed again, the launch would be postponed until Feb. 20.

Once in position, the observatory will sit almost a million miles from the day side of Earth, where it will track particles emanating from the sun.