statemachine writes: An aging weather satellite crucial to accurate predictions on the intensity and path of hurricanes could fail at any moment and plans to launch a replacement have been pushed back seven years to 2016. Last year, forecasts were off an average of 111 miles two days in advance, a figure that has been cut in half over the past 15 years. But experts said that could grow 10 percent to 122 miles if the satellite is lost, causing the "cone of error" well known to coastal residents to expand. QuikScat, launched in 1999 and designed to last two to three years, provides key data on wind speed and direction over the ocean. Weather aircraft and buoys can also obtain similar measurements near a storm, but they do not provide a constant flow of data as QuikScat does. Now the satellite is limping along on a backup transmitter and has other problems. A European satellite called ASCAT is available, but it does not give scientists as clear a picture as QuikScat because the distance between the readings it takes is larger. A NASA and Department of Defense satellite called WINDSAT also measures wind speed and direction, but it too is beyond its expected lifespan, and scientists have had trouble using it to observe tropical weather systems. Even if money were immediately available, a replacement satellite is estimated to take at least four years and cost approximately $400 million to build.