Wind, rain and snow. Well, wind and rain in my area of the country and that is enough to deal with.  A wind or rainstorm  can ruin your pool and leave things a mess for you.  In Southern California we get the Santa Ana winds which can gust up to 80 miles per hourand we get rain events every few years called "El Nino" which can bring up to 30 inches of rain. 

 

So we do get weather even in California on occasion. Here is a series of videos that will help you clean your pool after a storm.