As a glider pilot, I would like to get notified when the wind is at a certain speed at altitude. We use this to identify opportunities for mountain wave soaring. We'd also want to know whether we're clear of clouds.
Example rule: Notify me when the wind is between 160 and 200 degrees (hitting the mountain on the south side), at least 15 knots at 850mb and cloud base is higher than 18,000 ft with no rain.
There are several other interesting parameters for glider pilots, including thermal strength, CU cloud base, top of lift, etc. I am happy to share details on those.