Repeated storms are expected to bring dangerous flash flooding to parts of the southern U.S. starting Sunday and carrying into the start of next week, with a Level 1 out of 4 flash flood threat already in place. The FOX Forecast Center says lingering tropical moisture and a stationary front are setting the stage for heavy downpours that could hit Oklahoma, Arkansas, Tennessee and northern Mississippi.
The warning matters now because the threat begins Sunday and intensifies on Monday, when the risk rises to a Level 2 out of 4 flash flood threat. Nashville, Oklahoma City and Charleston, South Carolina, are among the places under threat, and the same weather pattern could put millions of Americans in the South in harm’s way as roads and low-lying areas take on water fast.
Rain totals of up to 2 inches are possible in some areas, and a widespread 1 to 2 inches looks likely. The FOX Forecast Center said localized pockets of heavier downpours could exceed those totals in Oklahoma and Arkansas, where the same storms may produce sudden flooding in one neighborhood while leaving another with only a soaking. That range is why the forecast reaches beyond a simple wet-weather call: it is the kind of setup that can turn a few hours of rain into a rescue call.
There is also a split in how the rain will be received. In Arkansas, some communities welcome it because of ongoing exceptional drought conditions, even as the same system threatens flash flooding elsewhere. The rain is being driven by a stalling cold front, and that front will trigger widespread heavy rain across Oklahoma, Arkansas, Tennessee and northern Mississippi before the worst of the threat begins to ease on Tuesday.
By Tuesday, the danger is expected to downgrade, but it will not be gone. A Level 1 out of 4 risk will remain for the same region, which means the wettest part of the pattern may be fading while the ground stays primed for runoff. For anyone in the path of this system, the question is not whether the rain comes — it is where the heaviest band stalls and who gets stuck under it longest.
