An outbreak of severe weather is expected across portions of the Midwest and Upper Midwest on Monday, April 28, 2025, according to the U.S. National Weather Service’s Storm Prediction Center (SPC). All severe hazards are possible, including strong to intense tornadoes, very large hail over 5 cm (2 inches) in diameter, and severe wind gusts up to 120 km/h (75 mph).
SPC forecasters note that a strong mid-level jet streak will move rapidly northeastward from the Southwest to the Upper Midwest during the day. As this occurs, a surface low-pressure system will deepen and progress from the northern Plains to the northern Great Lakes.
Strong southwesterly low-level flow is expected to advect high theta-e air (equivalent potential temperature, a measure of heat and moisture in an air parcel) northward across the Midwest and into parts of the Upper Midwest. Broken to scattered cloud cover will allow for surface heating and strong destabilization across the warm sector, particularly in Iowa, southeastern Minnesota, and western Wisconsin…