The jet stream in the atmosphere will be running from west to east, nearly parallel with the cold front as it moves into southern Wisconsin. This also means that storms will be moving in that same direction, as they typically tend to follow the flow in the mid-levels of the atmosphere. This type of set-up, however, tends to lead to the possibility of 'training' thunderstorms - storms that move over the same area for a period of time.
Moisture in the atmosphere will be very high ahead of the front so any storm that does develop will have the potential to produce heavy rain. Wind may also be a concern if storms were to develop earlier in the evening Saturday. Storms will be possible into Sunday morning with drier conditions expected by the late afternoon.
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