I have a 30" MES. I will be getting a cover for it next weekend. One of those that has the elastic on the bottom. I live in the central valley in California so we're pretty dry during the summer but we can get some rain during the winter. We don't get any snow. Would it be OK to store the MES outside with the cover when it is raining or is that a bad idea? I don't have a covered patio so it would right out in the elements.