The grosse pointe spotter, which was the only observer near Detroit city proper, used to be notorious for low balling and tons of missing data. But yet those maps would represent whatever amount was reported, including the low balls, missing data, and all. They've gotten a bit better but still not great. Just ask powerball lol, he used to live near there. It causes the maps to have an unrealistic representation for detroit and the far east side. I understand they are working with what they had, but I wish there were more diligent observers. There are also handful of good observers who phone in for individual storms but don't keep consistent data.