A very moist air mass along with an upper-level disturbance and an approach of a surface frontal boundary will bring about the potential for heavy rainfall that may lead to localized flash flooding through Saturday. Here are the reasonably highest rainfall amounts for Friday and then again on Saturday which is roughly between 1 and 3 inches. If these rainfall amounts fall in a short period of time or over the same location for a prolonged period of the time, the risk for flash flooding will increase.