It doesn't usually take much for Northern California, by late May, to start looking ahead to its long, dry summer. But on Tuesday, Davis got a sharp reminder that the weather doesn't always follow the seasonal script, as Newsweek detailed. What happened? The outlet reported that a rare late-May thunderstorm drenched the city with nearly a month's worth of rain in just a few hours and sent temperatures plunging by more than 20 degrees. Storm chas…