Another rocky day for the Upper Midwest today as another storm system makes its way through the area. Once again, portions of northern Iowa are under a moderate risk of severe weather, according to the Storm Prediction Center. Although similar to the set up we saw on Wednesday, this one appears a little different. With a little stronger forcing and a little more cold air, the potential for severe weather seems a bit stronger.
Storms are expected to develop in Minnesota and the eastern Dakotas by mid to late afternoon. This initial development area is where the highest risk for tornadoes and large hail exists today.
You can see that in the graphic to the right. With the warm front north of Iowa today, hot and humid conditions will take hold again today, prompting yet another Heat Advisory for much of the state. This should also hold off any thunderstorm activity well north of Iowa for most if not the entire day.
After a few hours of development mainly to our north, some storms may begin to back build into Iowa, or eventually makes their way into the state at or after sunset. In the meantime many areas will see heat indexes above 105 degrees this afternoon as plenty of sun and moisture stream into the state. Once storms arrive, the primary threat should shift to a strong damaging wind event.
You can see in the graphic to the left that damaging wind gusts are the greatest threat to parts of Iowa tonight. This threat could last well into the night depending on the movement of the storm system. This is something that will have to be closely monitored during the evening hours. I want to make a note to all our viewers that I will be in Chicago today but hope to be back in communication by the time storms begin threatening Iowa. I DO hope to have the live chat up and running tonight if needed. But in the event that does not happen, you can always find the latest information from the national weather service in the twitter feed to the right of this post.
In the meantime, stay cool today and we’ll pass along any new information throughout the day we can as this storm system takes shape.