Hooray! Article mentioned Michigan used ballons to study ice storms. California\Nevada was using balloons to study extreme hot air density. Phenomenon known to stop lift on helicopters and aircraft during hot temperatures and summer heatwaves. My feeling, a few recent helicopter accidents seen in the news should have benefited via continued study.

Realtime is the key. Example- instead of having a no-fly-day in effect, aircraft could have a measurable less-risk fly window when needed.