A more active pattern will develop over the next few days, including a threat for some heavy rainfall mid-week. It will originate from a stationary boundary nearby. This boundary will act as a ramp to life moisture up and over, before falling as rainfall on the other side.
Repeat this process over and over again, and rainfall will add up quickly. Several weather models are predicting an axis of 2" of rain or more may be possible at least across parts of Iowa. Locally, it will depend on where the front ends up each day, and the frequency of showers and storms over any particular region. If storms develop over the same spots, flash flooding may be a concern, particularly Wednesday and Thursday.
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