Published: October 27, 2026
TWIN CITIES, MINNESOTA: An approaching storm system could bring strong to potentially severe thunderstorms to the Twin Cities metro and portions of central and southern Minnesota on Wednesday, October 28, 2026, with the possibility of large hail, damaging winds, and even an isolated tornado.
The Storm Prediction Center (SPC) has highlighted an environment that could become favorable for severe thunderstorms Wednesday afternoon and evening. However, significant uncertainty remains regarding whether atmospheric conditions will allow storms to fully develop and take advantage of the available ingredients. The SPC has placed much of central and southern Minnesota, including the Twin Cities metropolitan area, under a Level 1 of 5 Marginal Risk for severe thunderstorms, indicating that isolated severe thunderstorms are possible.
This forecast has a lot of uncertainty about the ingredients coming together, but there is a chance there may be enough of the ingredients favorable for severe weather without necessarily producing widespread or significant severe thunderstorms.
Severe Weather Risk Covers Much of Minnesota
The SPC's latest outlook, issued Tuesday afternoon, outlines a broad area of potential thunderstorms extending from central Minnesota through the Twin Cities and into southern Minnesota and western Wisconsin. A system will approach the region from the west, coming out of the northern Plains and into the Upper Mississippi Valley late Wednesday afternoon and early evening.
As the disturbance approaches, a low-pressure area will quickly develop, and the associated frontal boundaries will help draw warmer, more humid air northward into Minnesota. Surface dew points are forecast to climb into the lower 60s in a narrow corridor ahead of the approaching cold front, providing additional moisture necessary for thunderstorm development. At the same time, substantial wind shear is forecast to develop, which is an important ingredient for organized severe thunderstorms. Wind shear is the change of wind speed and direction with height.
Although atmospheric instability is expected to remain relatively modest, the combination of moisture, wind shear, and approaching frontal boundaries could be sufficient for a few storms to possibly become severe.
Tornado Threat Possible, But Dependent on Storm Development
One notable aspect of Wednesday's forecast is the potential for an isolated tornado, despite the relatively low overall severe weather risk. The SPC has outlined a 2% probability of a tornado occurring within 25 miles of a given location across portions of central and southeastern Minnesota and western Wisconsin, including the Twin Cities. This threat is supported by the previously mentioned wind shear in the lowest levels of the atmosphere, which is particularly favorable for helping cause thunderstorms to begin to rotate.
A strengthening south-southwesterly low-level jet, with winds exceeding 40 knots (about 46 mph), is expected to develop near sunset. At the same time, winds will shift direction and increase with height, creating an environment that could support rotating thunderstorms known as supercells. Supercells can produce large hail, damaging winds, and tornadoes.
However, whether storms can take advantage of this favorable wind profile remains a major question. Elevated convection may develop out ahead of the fronts. Elevated thunderstorms can produce large hail, but they generally have less ability to take advantage of the near-surface rotation needed for tornado development. If thunderstorms instead become surface-based, meaning they draw warm, moist air directly from near the ground, the tornado threat could increase. If a surface-based thunderstorm develops, a tornado may form.
The 2% tornado probability does not mean there is a 2% chance that a tornado will strike a particular home or neighborhood. Rather, it represents the SPC's estimated probability of a tornado occurring somewhere within 25 miles of a point.
Large Hail Could Be the More Widespread Severe Weather Concern
Even if thunderstorms fail to become surface-based, the environment could still support hail-producing storms. The SPC has outlined a 5% to 14% probability category for severe hail within 25 miles of a location across much of the Twin Cities and surrounding areas.
The latest model guidance suggests atmospheric instability could reach approximately 500 to 1,000 joules per kilogram of mixed-layer CAPE during the afternoon and evening. CAPE, or Convective Available Potential Energy, measures the energy available for rising air within thunderstorms. We have touched on this many times in the past. While instability values are not exceptionally high, they may be sufficient to support strong thunderstorm updrafts when combined with the anticipated wind shear. We often call this a high-shear, low-CAPE setup.
Additionally, relatively steep temperature decreases with height in the middle atmosphere could encourage hail development. Substantial daytime heating and storms developing along the approaching cold front may still produce hail as they encounter instability above the surface. Severe hail is generally defined as hail measuring at least one inch in diameter, approximately the size of a quarter.
Damaging Wind Threat Focused Farther South
The severe wind threat appears somewhat more concentrated across southern Minnesota. Areas near Redwood Falls, Mankato, Owatonna, and Albert Lea are included within a 5% to 14% probability category for severe thunderstorm winds. This area extends toward the southern Twin Cities region, although the greatest wind probabilities depicted in the provided outlook are generally south of Minneapolis and St. Paul.
The NWS defines severe thunderstorm winds as gusts of at least 58 mph. Strong winds aloft could support damaging gusts if thunderstorms develop strong enough downdrafts to transport that momentum to the ground. However, as with the tornado threat, storms' ability to organize and remain strong will depend on the amount of instability available.
Cloud Cover Could Determine How Severe Storms Become
One of the biggest uncertainties in Wednesday's forecast is how much sunshine the region receives before thunderstorms develop. Increasing moisture and warm air moving northward into Minnesota during the day will likely produce considerable cloud cover, which could limit temperatures and reduce the amount of energy available for thunderstorm development.
High temperatures are generally expected to reach the low 60s, 60-63F, although some locations could climb into the lower 70s if warming is strong enough. The best chances of the 70s would likely fall across southern Minnesota. Additional sunshine would allow temperatures to rise and help weaken a stable layer, cap, in the atmosphere that could otherwise suppress thunderstorm development.
The cap is otherwise known as convective inhibition, or CIN. We’ve talked about this before, but it's best explained as the lid on a soda. If you shake a bottle of soda and don’t open the lid, you can see the pressure build up, but nothing happens. Once you open that soda lid, it explodes. That same idea happens with storms. If the cap is too strong, the storms can’t break it and fully develop. If that inhibition, cap, weakens enough, thunderstorms could become rooted near the surface and take advantage of the strong wind shear. On the other hand, if clouds persist and temperatures remain cooler than expected, the atmosphere may struggle to support sustained surface-based thunderstorms.
If storms do develop, they will likely be relatively short-lived or pulse in intensity rather than remain organized for extended periods. Again, severe weather potential will largely depend on the amount of surface heating. This makes Wednesday's temperature trends, cloud cover, and developing frontal boundaries particularly important factors to monitor.
When Could Thunderstorms Develop?
The most favorable period for thunderstorm development currently appears to be late Wednesday afternoon into Wednesday evening. The strengthening low-pressure system and approaching cold front will provide the lift necessary for thunderstorms to develop. Meanwhile, a warm front near the Minnesota-Wisconsin border could provide another focus for storm development.
The strongest low-level winds are expected to develop near sunset, around the same time atmospheric instability may be near its daily maximum. This overlap could provide a relatively narrow opportunity for thunderstorms to become organized and potentially severe. However, the exact timing and placement of storms remain uncertain, and not every location within the Marginal Risk area will necessarily experience a thunderstorm.
It appears one round of storms could work through the Twin Cities metro around late morning to early afternoon as the warm front lifts through the region, with the second round (the best chance for severe weather) around and after 4 PM.
What Happens After Wednesday's Storms?
After Wednesday's storm system, a cold front will move through Minnesota, bringing cooler, drier air into the region. Thursday is expected to feature improving weather conditions as high pressure builds across the Upper Midwest.
Although temperatures will be cooler, the arrival of high pressure should finally bring more sunshine after Wednesday's cloudier and potentially stormy conditions. High temperatures Thursday are expected to reach the 50s across much of the Twin Cities.
Friday should feature similar conditions, with temperatures generally remaining in the 50s as the high-pressure system gradually shifts eastward. Another chance for rain is possible Friday, with better chances for additional rainfall looking to remain south of the Twin Cities.
Monitor Forecast Updates
Although Wednesday's overall severe weather risk remains relatively low, the combination of strong wind shear, increasing moisture, and approaching frontal boundaries warrants attention. The most important uncertainty is whether thunderstorms can become surface-based and organized enough to produce severe weather. If clouds limit daytime heating, the threat could remain primarily focused on hail-producing elevated thunderstorms, or severe weather may fail to develop altogether. If more sunshine occurs and atmospheric instability increases, however, a few storms could become stronger, with the potential for damaging winds, large hail, and an isolated tornado.
Be sure to have multiple ways to receive weather warnings, particularly during the late afternoon and evening hours. Residents can receive weather alerts through Wireless Emergency Alerts on mobile devices, NOAA Weather Radio, local broadcast meteorologists, and trusted weather applications.
Additional updates and changes to the forecast and severe threat are expected through tomorrow as conditions become more or less aligned. Limitless Media News will continue monitoring the potential for strong to severe thunderstorms across the Twin Cities and southern Minnesota and provide updates as new forecast information becomes available.
Written By: Meteorologist Will Wight
