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Writer's pictureNortheast Wisconsin Weather

THUR: Thunderstorms at times today, some strong

Good morning! Our first round of thunderstorms is moving away from the area right now. Some of these storms were strong, producing mostly small hail. (If you have any pictures of hail, please send them my way!)


For the rest of the day today, you can expect a lull in the thunderstorms now until the afternoon. During peak heating, CAPE (energy in the atmosphere that helps thunderstorm development), will be around 500-1000 J/kg. You really only need ~500 J/kg or so for a thunderstorm to develop, but it'll be fairly weak. CAPE will be highest near the warm front, which I think will stall just south of Highway 29. You can clearly see the warm front on my high temperature forecast:

Near the warm front, there's the potential for some supercells, which would pose an all-threat situation - tornadoes, damaging wind, and large hail, but I don't see that as a high possibility. The Storm Prediction Center has issued a marginal risk (level 1/5) for the SW portion of the region.

NOTE: The NWS has postponed the tornado drill for today for Severe Weather Awareness Week. It has been rescheduled for tomorrow, Friday, April 20th.

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