TUCSON, Ariz. (KGUN) — One of the important forecasting tools for Tucson’s National Weather Service has been grounded—at least for now. Marc Singer leads the National Weather Service office for Tucson says, “If we know what the precipitable water is, which is a measure of the water in a column of air, for example. But the National Weather Service Office in Tucson hasn’t been launching weather balloons since late January. Marc Singer says his office can create accurate forecasts using other data including balloon data from the weather service in Phoenix. Once it is, he says he’ll be back to launching balloons twice a day for the extra information they add to the forecast.