I was at Busch Gardens yesterday and rode the Cheetah Hunt twice in a row minutes before it got stuck (I was actually walking through Edge of Africa when I heard the announcement that the ride would be closed).
After the initial launch, the train is sent around the first corner to the lower tunnel for the second launch. It was apparent when I, along with my sister, rode it the second time that it was barely making it over the first turn. It was so noticeable that we, at the time, mentioned that if it were to fall back, it was engineered to brake us where it had propelled us earlier.
Thus, it had been running slow prior to its final run, and not just that particular time. This was 1.5-2 hours before the storm came through, and it was not windy, so that had nothing to do with it. Also, they were running only the first train yesterday with the second one roped off (typical during the week in the off-season). So, there may be an adjustment to how fast the train is propelled when it's coming from a dead stop (second train waiting for the first to clear) and when it's got a rolling start (when the first train is launched).
I was there this morning too, and no, it was definitely closed. The ride operators were all standing outside of the ride apologizing to guests (Skyride was closed as well):
Also, maybe BG management can take this as a hint that the Cheetah Hunt is too tame