Green Bay, Wisconsin – Drivers and residents across Wisconsin should prepare for a volatile stretch of severe weather starting Monday morning, with strong storms bringing large hail, damaging winds, and tornado threats to much of the state through early Tuesday.
According to the National Weather Service in Green Bay, storms will begin moving into central and northeast Wisconsin between 8 a.m. and 1 p.m. Monday. Hail up to 1 inch in diameter is expected to be the main concern early, with a possible break in storm activity during the afternoon. Storm chances return between 6 p.m. and 10 p.m., with up to a 30% chance of dangerous storms redeveloping. If these become discrete supercells, the risk includes golf ball-size hail and potentially strong tornadoes.
The most intense period is forecast from 9 p.m. Monday through 3 a.m. Tuesday, when a line of storms will likely sweep across areas like Green Bay, Marshfield, and Oshkosh, packing damaging winds and embedded tornadoes. Breezy showers linger into Tuesday, and gusts could bring down weakened tree limbs or cause power outages—especially where infrastructure was already stressed.
Travel could become hazardous, especially on I-41 and highways near Wisconsin Rapids and Tomah. Residents are urged to secure outdoor items, avoid non-essential travel during storms, and keep devices charged in case of power loss. Warnings remain in effect into Tuesday morning, with additional alerts possible as the system moves through.
