National Weather Service meteorologists will be sending weather balloons up into the sky four times a day, instead of the normal twice-a-day launches, to help forecasters gain better insight into Hurricane Irma's likely course. ... After the weather instruments were calibrated, the radiosonde was brought outside to the launch shed. ... "It does seem like old technology. I'm sure there are going to be better methods of sampling upper air data, but right now measuring it with the instrument going through the parcel of air is the best we have," Kern said. The reason for the extra launches came down...