Bow Echo Alert: Moderate Risk for Widespread Damaging Winds Across the Northern High Plains This Evening!
As of late this afternoon, storms are just beginning to develop across parts of southeastern Montana, western North Dakota, and far northwestern South Dakota. The real show is still ahead, and it has the potential to be impressive.
The Storm Prediction Center has issued a Moderate Risk for severe thunderstorms, centered on the development of a well-organized bow echo — a fast-moving, arc-shaped storm system known for producing long swaths of damaging straight-line winds. This setup is classic for the northern High Plains and carries a real chance of a significant wind event.
Timing of the Worst Weather
The strongest winds are expected from late afternoon through early evening, with the bow echo likely reaching peak intensity between 5 p.m. and 9 p.m. local time across the Dakotas. The system should track northeastward through the evening before gradually weakening overnight.
What to Expect
• Damaging Winds: The primary threat is a widespread swath of 60–100 mph gusts. Some areas could see localized peaks of 85–100 mph if the bow echo stays well organized.
• Severe Hail: Large hail is possible, especially in the early stages of storm development.
• Isolated Tornadoes: A few brief tornadoes cannot be ruled out, particularly with book-end vortices on the leading edge of the bow echo.
Tornado Outbreak Probability
The chance of a tornado outbreak today is very low. While isolated tornadoes remain possible, conditions are not favorable for a widespread or significant tornado event.
How to Prepare
Prepare for the worst and hope for the best. Have a reliable way to receive warnings (weather radio or phone alerts), secure or bring inside any loose outdoor items, and know exactly where you and your family will go if strong winds or large hail threaten your area. A few minutes of preparation now can prevent a lot of trouble later.
This is a classic northern High Plains wind event — the kind that can produce impressive damage over a large area if the bow echo holds together. Stay weather-aware this evening if you’re in or near the highlighted risk area.
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