High moisture levels in the atmosphere combined with an approaching front will set the stage for another round of heavy rain tonight. There is a potential for storms to move across the same areas which would increase the risk for excessive rainfall.
Flash Flood Watch for portions of south central Iowa, southeast Iowa, and southwest Iowa. The flash flood watch is in effect from 9 PM CDT this evening through Thursday morning. Thunderstorms with heavy rainfall may lead to isolated flash flooding in southern Iowa tonight into Thursday morning. The main concerns will be limited to towns as well as locations that receive very heavy rainfall.
A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a VERY DANGEROUS SITUATION. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.