Excessive heat warning for Twin Cities, severe storms could redevelop Wednesday

The big question is when and where storms will develop Wednesday afternoon.
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storm, shelf cloud

Wednesday has the makings of one of the most uncomfortable days of the year for Minnesotans, especially those who live in the Twin Cities. 

High temperatures forecast to rise into the low 90s, coupled with tropical humidity will make it feel like it's more than 100 degrees outside in the Twin Cities. Because of that, the National Weather Service has issued an excessive heat warning for the entire seven-county metro area from 11 a.m. until 8 p.m.

Heat indices are forecast to range from 100-105 degrees in the metro, while a heat advisory is in effect for most of the southern half of the state. 

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Anyone working outside is advised to drink plenty of fluids, wear light and loose-fitting clothing and to take frequent rest breaks in shaded areas. 

Meanwhile, severe storms blasted through parts of northern Minnesota during the overnight and pre-dawn hours. Winds in excess of 80 mph were reported near Fergus Falls, while trained spotter Jeffrey Roberts sent BMTN this photo of tree damage in nearby Ottertail. 

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As of 7:20 a.m., about 1,000 customers were without power in Becker County, while nearly 3,900 residences had lost power in Otter Tail County. The storms that left the trail of damage are weakening as they move into east-central Minnesota. 

The big question is how storms redevelop later in the day. As the National Weather Service points out in its forecast discussion this morning, computer models are all over the place in depicting what will unfold. 

For example, the overnight run of the NAM Nest computer model shows storms re-firing around 5-6 p.m. in central Minnesota, possibly extending into the Twin Cities. 

06Z-20200708_NAMNSTNGP_prec_radar-8-28-10-100

The HRRR model shows storms exploding over central and northeast Minnesota this afternoon and evening, with more storms slower to get going further southwest. This model run would indicate lower chances for storms in the metro. 

11Z-20200708_HRRRNGP_prec_radar-1-18-10-100

These models update throughout the day, so we'll be watching them closely, as will Tom Novak of Novak Weather, who will have a weather briefing available here at Bring Me The News this afternoon. You can follow him on Facebook and Twitter to stay up to date.

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