I was thinking that a coalescing raindrop might absorb energy from the noise of a passing jet and drop from the sky. I don't think it can make it rain in a desert, though.
"planes flying above clouds during precipitation events can cause far more rain or snow to fall from those clouds – totaling up to 14 times more precipitation, under the right conditions."
And I would think there would be a lull in rainfall after this phenomenon had "shaken loose" a few extra raindrops, so that hourly rainfall would maintain its average. But then, rainfall is higher on the windward side of mountains, so maybe the jet passing would elicit rainfall that wouldn't otherwise fall.
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