SULLIVAN, Wis. — The National Weather Service (NWS) has issued a Severe Thunderstorm Watch for Milwaukee, Waukesha, Racine, Kenosha, Jefferson and Walworth counties until 3 a.m. on Tuesday, March 31.

NWS says the largest potential threat from these storms is large hail.

Storms have developed in eastern Iowa, with expectations that a few individual storms may become severe with hail around 1″ in diameter. Storms may weaken as they move eastward. #swiwx #wiwx pic.twitter.com/pMMAuG5vzU

— NWS Milwaukee (@NWSMilwaukee) March 31, 2026

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