Severe storm risk highest in southwestern Minnesota
On Monday afternoon, June 2, southwestern Minnesota faces the highest risk for severe thunderstorms, with storm activity beginning early in the afternoon. According to the Storm Prediction Center (SPC) and the National Weather Service (NWS) Twin Cities, conditions will support intense storm development especially along the Minnesota–South Dakota border and into northwestern Iowa.
Temperatures will climb into the upper 80s to low 90s (31–33°C), especially from central Minnesota southward through Nebraska, and will combine with dew points in the upper 50s to mid 60s (14–18°C). This combination will destabilize the atmosphere significantly, particularly in southwestern Minnesota, promoting vigorous convective activity as a cold front advances eastward.
What about the Twin Cities and eastern Minnesota?
Despite the afternoon heat, the airmass east of the Mississippi, including eastern Minnesota and western Wisconsin, will have less available energy (CAPE) for thunderstorm intensity. This means that by the time storms reach areas such as the Twin Cities and Rochester, they are expected to weaken, likely transitioning into steady rain rather than continuing as severe storms.
The NWS Twin Cities described the severe weather potential in this region as “nearly null,” emphasizing that the strongest low-level convergence and best instability will remain well west of the metro area.
What is an anafront and why does it matter?
These storms are expected to form along what’s called an “anafrontal” system. Unlike typical cold fronts where precipitation falls ahead of the boundary, an anafront is characterized by clouds and rain that form along and even behind the front. This setup allows for continued rainfall even after the initial storms have passed, which means showers are likely to persist into Tuesday, especially in southeastern Minnesota, including the Twin Cities and Rochester.
Timing and development: When storms could hit
The HRRR high-resolution model suggests that initial storm formation will begin as early as 2–3 p.m., developing over western and central Minnesota, particularly where low-level convergence is strongest. Additional activity may emerge to the southwest, near the Nebraska border, and then track eastward.
By 4 p.m., model data show low CAPE values around the Twin Cities, suggesting that any storms that do reach the metro area will have limited severity and likely transition into moderate rain. Rainfall could become steady overnight into Tuesday, keeping eastern Minnesota under cloudy and wet conditions into the next day.
Key areas to watch closely:
- High risk: Southwestern Minnesota from the South Dakota and Iowa borders north to the Canadian border
- Low risk: Twin Cities, Rochester, eastern Minnesota, and western Wisconsin
- Storm initiation time: As early as 2 p.m. CDT
- Weather pattern: Anafrontal cold front with post-frontal precipitation
Stay aware for updated watches or warnings, especially across southwestern Minnesota, as this area is most susceptible to severe thunderstorm development Monday afternoon.
