The last four days have seen heavy rainfall events impact portions of Iowa with eastern Iowa receiving the heaviest totals on Sunday. These events are not necessarily widespread and so there can be "unlucky" pockets of the state that miss out on the most significant rainfall totals. One way to compute where these relatively drier pockets are located is to step backwards in time and see how many days it takes to accumulate some threshold of precipitation. For the featured map, the threshold is three inches with precipitation estimates coming from NOAA's MRMS project. This map nicely shows these small areas that have accumulation day totals in the 30 to just over 45 day range, which puts them back into the end of April. There are more chances of significant rainfalls this week, so hopefully some of these isolated areas can have better "luck" with receiving needed rainfall.