Ok, enough of the snow jokes. I mentioned it because some people use DOT approved racing tires on other cars other than cobras, and besides, I know of at least one cobra owner who drove his cobra all winter long in some pretty substantial snow. I have also seen pictures of cobras in the snow. But, enough of that. The critical thing is that, as others have mentioned, these cars are light and the likelihood of hydroplaning on wet roads is increased over other types of cars. The issue that makes some of the DOT tires not suitable for the road is that they are made for dry pavement and do not have adequate tread to prevent hydroplaning.
Most people do not drive in the rain, but you never know when you will be caught in an unexpected downpour or even a slight drizzle. If you do get caught in the rain with less than optimum rain tires, use a racers trick, do not drive in the common tire paths as that is where the most
oil and rubber will be imbedded in the road and therefore the least amount of traction in wet conditions. Move a few inches to one side and be prepared.