Severe storms drench parts of Twin Cities, southern MN

Flash flooding was a possible hazard.
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8:25 p.m.

Tornado warnings have been allowed to expire. Forecasters say a thunderstorm passing through the western and southern suburbs of the Twin Cities includes a big wall cloud. It might produce some funnel clouds but no tornadoes are expected, the Weather Service says.

 There's torrential rainfall, though, so flash flooding is possible in Hennepin, Dakota, and Scott Counties. Drivers are reminded to turn around if they get to a place where the road is covered with water.

7:50 p.m.

A tornado warning is in effect for parts of Hennepin, Scott, and Carver Counties in the southwestern Twin Cities area until 8:15 p.m.

The Weather Service says at 7:46 a severe storm that could produce a tornado was over Chanhassen and was headed toward Eden Prairie, Shakopee, and Savage. Anyone in that area should take cover.

Update: 7:40 p.m.

Thunderstorms with chunky hail and strong wind gusts are working their way across southern Minnesota Tuesday night.

The heavy rain means there's a chance of flash flooding overnight, forecasters say.

The National Weather Service says the downpours could bring up to three inches of rain to some areas, especially in south central Minnesota, including Mankato.

MPR's Paul Huttner said at 7:30 p.m. the storms dumping torrential rain on the southwestern Twin Cities showed some rotation.

 Any new flood or storm watches or warnings will be posted here.

5:30 p.m.

There's a severe thunderstorm watch in effect until 11 p.m. for 30 counties in Minnesota – from the South Dakota border, stretching east through the Twin Cities.

It's the darker pink on this map from the National Weather Service:

The orange on the map above indicates a severe thunderstorm warning – meaning dangerous weather in those places was imminent as of about 5:20 p.m. (Warnings generally come and go fairly fast, so they're probably different if you're looking at this story later. Go here to see the latest warning areas.)

The Twin Cities National Weather Service says to expect large hail and damaging winds. There is a small risk for tornadoes, but generally out in west-central Minnesota.

At 5 p.m., trained spotters had seen golf ball-size hail in Renville. The Weather Service also warned about wind gusts up to 60 mph and "torrential" rain, which could lead to flash flooding in spots. 

You can keep an eye on the NWS Twin Cities Twitter account for frequent updates.

The original story from Tuesday morning is below.

It's going to be sticky – then stormy – today

It's going to be a sticky and stormy day. 

The forecast shows temperatures will climb into the 80s and 90s for much of Minnesota Tuesday, but with dew points in the 60s and 70s it'll feel closer to 100 degrees in the western part of the state. 

That's why the National Weather Service has issued a heat advisory for several counties, including: Chippewa, Kandiyohi, Lac Qui Parle, Redwood, Renville, Swift, and Yellow Medicine. The advisory is in effect from 1-7 p.m. 

Storms tonight

Then – as is with most humid days – there will be storms. 

The National Weather Service says storms will develop in western Minnesota late Tuesday afternoon and then spread east Tuesday night. 

The area in western Minnesota that's expected to see the hottest heat index will also be the most likely to see severe storms. 

The Storm Prediction Center says there's an enhanced risk for severe weather there (the tan area on the map above), meaning numerous severe storms are possible and they'll be more persistent and widespread, with some intense storms. 

Large hail, damaging winds and a few tornadoes are possible with these storms, especially in the enhanced risk area, the National Weather Service says.

Some places could also see heavy rainfall, which could mean flash flooding. The map below shows the areas – mainly in south-central Minnesota – that could see upwards of 3 inches of rain with this storm. 

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