Heavy rain brings flash flood threat - KTTC Rochester, Austin, Mason City News, Weather and Sports

Heavy rain brings flash flood threat

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ROCHESTER, Minn. (KTTC) -- Days and days of heavy rain have left the ground saturated and local rivers and streams swollen. With more heavy rain in the forecast all eyes need to be on the potential for flooding.

A persistent storm system is sending us repeated rounds of storms and heavy rain. It's the repeated nature of these storms that is so concerning going forward over the next several days.

In Mankato, around five inches of rain fell Tuesday night and Wednesday morning, overwhelming the city's storm sewer system. One lone cell parked itself over the city for quite some time and caused major flash flooding and mudslides. 

In Owatonna, creeks and streams started to overflow their banks. 

In Rochester, the Zumbro River along with every other stream and tributary are running very high.

Current hydrographs of the Cedar River at Austin have the river at or near flood stage. That level, however, is dependent on the rain we see over the next couple of days. 

Another example shows the Whitewater River near Whitewater State Park going up and down over the next several days. It all depends on how much rain we get.

It is important to note that it was one lone cell in Mankato that finally sent water rushing through the town. Flooding like what was seen there can happen in one spot and not another. 

The ground right now is like a wet sponge and it just can't take anymore water, but unfortunately it looks like more is on the way. 

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