A Developing Storm System Could Bring Strong Thunderstorms Across the Upper Midwest
A developing weather system is expected to bring Friday storms across the Upper Midwest as low pressure organizes over northeastern Manitoba and a secondary low develops along an advancing cold front. As the system strengthens, warm and humid air will surge northward ahead of the front, providing the instability needed to fuel thunderstorms.
Low Pressure and a Strengthening Cold Front
The primary area of low pressure will be positioned over northeastern Manitoba, where it will help pull a cold front eastward across the northern Plains and Upper Midwest.
Meanwhile, a secondary low is expected to develop along the front over eastern South Dakota. This low should strengthen as it tracks northeastward into Minnesota, increasing the overall organization and forcing of the storm system.
As the two areas of low pressure work together, the cold front will become an important focus for thunderstorm development.
Warm, Humid Air Will Provide Storm Fuel
Ahead of the cold front, the developing lows will help draw warm and humid air northward into the Upper Midwest.
That moisture will increase atmospheric instability, giving thunderstorms additional energy to work with. When combined with the approaching front and strengthening low pressure, the ingredients could support a line or clusters of thunderstorms developing Friday.
The exact location and intensity of the strongest storms will depend on how quickly the secondary low strengthens and how much instability develops during the day.
Areas to Watch Friday
The Upper Midwest, particularly areas across South Dakota, Minnesota and surrounding portions of the northern Plains, will need to monitor the storm system closely.
Some thunderstorms could become strong, especially where warm, humid air overlaps with stronger atmospheric forcing along and ahead of the cold front.
Potential concerns may include:
- Strong or damaging wind gusts
- Frequent lightning
- Torrential rainfall
- Briefly reduced visibility
- Localized flooding in areas receiving repeated thunderstorms
- Hail in the strongest storms
The threat will ultimately depend on the storm track, instability and wind environment that develops Friday.
Why This Setup Matters
This is a classic example of how multiple weather ingredients can come together to produce active thunderstorms. The Manitoba low establishes the larger-scale circulation, while the secondary low developing over eastern South Dakota provides another source of lift and organization.
At the same time, the northward transport of warm, humid air supplies the moisture and instability thunderstorms need.
As the cold front advances into this unstable air mass, thunderstorms could develop or intensify along the boundary.
Stay Weather Aware Friday
Residents and travelers across the Upper Midwest should keep an eye on the forecast as Friday approaches. Storm timing and intensity can change as new observations become available, particularly with a developing low-pressure system.
If thunderstorms develop in your area, move indoors when thunder is heard, secure outdoor objects beforehand, and avoid flooded roads.
Radar Watch HQ Final Thoughts
Friday could bring an active stretch of weather to the Upper Midwest as strengthening low pressure, a progressing cold front and increasing warm, humid air combine to create an environment supportive of thunderstorms.
The biggest forecast question will be exactly where the strongest storms develop and how much instability is available ahead of the front. Continue checking updated forecasts as the system approaches Friday.
Stay weather aware, stay prepared, and keep watching the skies with Radar Watch HQ.
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Radar Watch HQ Top 5 Essential Emergency Preparedness Picks
Whether you’re preparing for severe thunderstorms, flash flooding, hurricanes, wildfires, or extended power outages, these five emergency essentials can help keep your household safer when severe weather strikes.
A portable power station provides reliable backup electricity during outages, allowing you to power phones, medical devices, laptops, lights, small appliances, and communication equipment without fuel.
Best for:
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Flood barriers help divert or absorb water before it enters garages, doorways, and low-lying areas. They deploy quickly and can help reduce property damage during flash flooding.
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Bright, dependable flashlights are essential when the power goes out. Rechargeable or solar-powered models provide long-lasting illumination for navigating safely indoors and outdoors.
Best for:
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Keep phones, tablets, weather radios, and USB-powered devices charged when the electrical grid is unavailable. A solar power bank offers an additional charging option during prolonged emergencies.
Best for:
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A NOAA Weather Radio delivers official weather alerts directly from the National Weather Service, even when cellular networks or internet service are unavailable. It remains one of the most dependable ways to receive life-saving warnings.
Best for:
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Why Radar Watch HQ Recommends These Essentials
At Radar Watch HQ, preparedness is just as important as staying informed. These five emergency essentials can help you stay connected, protect your property, and safely navigate severe weather events. Having supplies ready before storms arrive allows you to respond quickly when warnings are issued and conditions begin to deteriorate.
