Just as many Americans were hoping winter had finally packed its bags, a significant late-season storm system is sweeping across the Upper Midwest and Great Lakes region, prompting a flurry of winter weather advisories and warnings from the National Weather Service. The multi-hazard event, active from 1–3 April 2026, is bringing heavy snow, sleet, freezing rain and the risk of severe thunderstorms — a classic and disruptive early April weather pattern that meteorologists have been tracking closely.
Which Areas Are Affected?
The winter weather advisory covers a wide band of the central and northern United States. The hardest-hit areas include:
- North and South Dakota: Large portions of both states are under significant winter weather advisories, with heavy snow, strong winds and rapidly deteriorating travel conditions. Snowfall accumulations of 3 to 6 inches are expected across many areas, with locally higher totals in elevated terrain.
- Minnesota and Wisconsin: A winter storm warning is in effect for portions of these states, with snowfall totals of 75–150mm (3–6 inches) likely, and higher localised totals possible in the northern reaches. The Twin Cities area is being monitored closely, with forecasters warning of a significant impact on the morning commute.
- Iowa and Illinois: The transition zone between snow and rain is forecast to bring a wintry mix — including sleet and freezing rain — that could create especially hazardous road conditions, particularly on elevated surfaces such as bridges and overpasses.
- Colorado Rockies: The northern Colorado mountains above 9,000 feet are under a separate winter weather advisory, with 3 to 10 inches of snow accumulation expected and winds gusting up to 40 miles per hour.
Multi-Hazard Threat: Not Just Snow
What makes this system particularly notable is its multi-hazard nature. While snowfall is the headline threat across the northern Plains, the southern edge of the system is producing conditions ripe for severe convective weather — including damaging winds, large hail and, in some areas, the potential for tornadoes. Parts of the Upper Midwest and Great Lakes could experience this dramatic contrast: blizzard conditions to the north and severe thunderstorm warnings to the south, sometimes within the same state.
The National Weather Service has urged residents in affected areas to take the advisories seriously and avoid unnecessary travel during peak storm conditions. Emergency managers in several states have pre-positioned resources to respond to accidents and outages.
Travel Disruption and Safety Advice
Late-season winter storms are notoriously disruptive because drivers and road crews can be caught off-guard after weeks of improving weather. The NWS and state transportation departments are advising:
- Delay non-essential travel until conditions improve
- Allow extra time if travel is unavoidable and ensure your vehicle is winter-ready
- Keep an emergency kit in your car: blankets, water, a torch, snacks and a phone charger
- Monitor local alerts through the NWS website, weather apps or local radio
- Check road conditions on your state DOT’s website before departing
Several school districts in Minnesota and Wisconsin have already announced closures or delays for 2 April, and regional airports have flagged the potential for flight disruptions. Airlines including Delta and American have issued weather waivers for travellers with plans to fly through Minneapolis-St. Paul, Milwaukee and Chicago O’Hare.
Why April Snowstorms Are Not That Unusual
While it might feel counterintuitive to be issuing winter weather advisories in April, late-season snowstorms are a well-documented phenomenon across the northern United States. The Upper Midwest in particular has a long history of significant April snowfalls — a 1965 storm dropped more than 16 inches on Minneapolis, and similar events have occurred in most decades since. Climate scientists note that while average temperatures are rising, the variability of late winter and early spring weather means surprise snowstorms remain a real risk well into April in northern states.
The jet stream’s position plays a key role. When the polar jet dips unusually far south in early spring, it draws cold Arctic air deep into the continent and can generate exactly the kind of storm system currently affecting the Midwest.
When Will Conditions Improve?
Forecasters expect the main snow event to wind down by Thursday evening in most affected areas, with temperatures recovering through the weekend. However, a secondary system is being monitored for later in the week, which could bring additional precipitation — though at this range, confidence in the details remains low. Residents in affected areas should continue monitoring NWS forecasts for the latest updates as this active weather pattern continues.