Torrential downpours dumping over eight inches of rain triggered severe flash flooding, road closures, and mudslides across south-central and southeastern Minnesota late Friday and early Saturday, September 19, 2026, prompting flood warnings and emergency responses across multiple counties.
A moisture-rich storm system battered southern Minnesota with precipitation overnight, overwhelming local waterways and forcing emergency responders into action. The deluge hit regions already burdened by drought conditions, shifting the weather threat from dry fields to sudden, destructive runoff. National Weather Service radar and rain gauges recorded totals across the region.
Near Spring Valley, totals surpassed 8 inches overnight. Lanesboro and Ellendale recorded more than 7 inches, while Caledonia, Preston, Chatfield, and New Richland all registered upwards of 6 inches of rain according to the MPR News reporting. The intense rainfall pushed creeks and rivers out of their banks, creating dangerous travel conditions that persisted well into Saturday.
Emergency Road Closures and Mudslides Across Southeastern Counties
Transportation infrastructure bore the brunt of the storm runoff. In Fillmore County, Mower County, and a small portion of northern Houston County, official flood warnings remained active until Saturday afternoon. Mud, trees, and debris swept across major thoroughfares, isolating communities and disrupting local transit.
State Highway 16 between Lanesboro and Whalan was forced to close for several hours Saturday morning after a rain-soaked hillside gave way, sending a wave of mud and debris across the asphalt. Although state transportation crews managed to clear and reopen the highway by mid-morning, adjacent waterways like the Root River continued to swell.
Further west in Spring Valley, Mayor Justin Mlinar reported that all streets were closed due to flooding shortly after dawn on Saturday, with water streaming through the downtown district near City Hall. Traffic on Highway 63 through the city was similarly detoured due to high water. City officials in New Richland offered sandbags and emergency lodging assistance to displaced residents, reinforcing local warnings.
In the city of Austin, rising waters along the Cedar River forced additional street closures late Saturday afternoon ahead of a predicted moderate flood stage crest. The Austin Police Department issued strict directives via social media regarding compromised roadways.
The city has roadblocks set up. DO NOT go around barricades.
Austin Police Department
Record-Breaking Rainfall and Gas Leak Response in Rochester Area
The storm system shattered regional precipitation records as it carved its path eastward. At the Rochester airport, meteorologists logged 2.35 inches of rain through midnight, eclipsing the previous September 18 record set back in 2003 according to KROC-AM News.
Emergency crews faced hazardous industrial incidents alongside standard water rescues. In Stewartville, firefighters responded at approximately 8:15 a.m. to reports of a possible gas leak. Floodwaters had dislodged a liquefied petroleum tank from its original location, causing an active propane leak. Responders successfully secured the valve, disconnected the supply line, and relocated the tank to dry ground.
Other local businesses sustained damage. The Old Barn Resort, situated between Lanesboro and Preston, reported severe flooding across its riverside golf course, forcing an indefinite closure of the greens while portions of downtown Lanesboro remained open.
Contrasting Drought Relief Against Flash Flood Risks
This weekend’s deluge arrives as a stark punctuation mark on a year defined by severe dryness. Data from the U.S. Drought Monitor released on September 17, 2026, had shown moderate to severe drought persisting across substantial parts of Minnesota, with extreme drought pockets reaching into Twin Cities counties including Dakota, Goodhue, Ramsey, Hennepin, and Washington.
While agricultural sectors and lawns could theoretically benefit from moisture, the sheer volume of water falling in a compressed timeframe transformed beneficial rain into an overwhelming flash flood threat.
State transportation and weather agencies continue to monitor river levels as runoff works its way through regional watersheds. Officials ask drivers to check MnDOT’s 511 system for ongoing road status updates as communities assess infrastructure damage and begin recovery efforts.