"Looks like some kind of Bénard convection," Jane said. It was amazing how much better heavy weather felt when you had a catchphrase for it. If you had a catch-phrase, then you could really talk successfully about the weather, and it almost felt as if you could do something about it. "That’s the kind of stratus you get from a very slow, gentle, general uplift. Probably some thermal action way up off the top of the high."