Meteorologists Jeff Masters and Tomer Burg calculate that 14 of 83 U.S. balloon sites, or 17%, are doing partial or no launches. That includes two stations that aren't launching because of a helium ...

Meteorologists Jeff Masters and Tomer Burg calculate that 14 of 83 U.S. balloon sites, or 17%, are doing partial or no launches. That includes two stations that aren't launching because of a helium ...

That’s about where the jet stream — which is a river of ... It takes 90 minutes to an hour to fill a weather balloon with helium or hydrogen, get it fitted with a sensor, then ready it for ...