An early season ring of fire pattern is projected to remain in place through the holiday weekend. Showers and thunderstorms will be an occasional visitor with the first wave lingering into Tuesday night. After that a two day respite ensues before chances return again Friday through Memorial Day. It's important to note that it won't rain all the time or in every spot but a daily threat currently exists over the holiday period.
The rains over the past weekend were significant over the southern half of my area where 2-4" amounts were common, with some of the larger totals centered on Iowa City and Coralville.
Here's a larger perspective.
Some hefty totals were also noted over Minnesota and Wisconsin where rainfall was 200-300% above normal from May 13th to the 19th.
With this water passing through the watershed of the Mississippi and more rain on the way, the main stem of the river is on its way up. More significant flooding is expected in the next 2 weeks. The NWS is showing these potential crests on the Mississippi but they are very tentative and dependent on how much rain falls the next 7 days.
Speaking of how much rain will fall, the Weather Prediction Center is showing this over the next 7 days.
The GFS below is off the grid heavy with these 16 day amounts. Hopefully these numbers don't come close to verifying or we've got big problems ahead. Amounts like this were not part of the input used to create the crest projections on the Mississippi above.
If there is some positive news it's the fact that after Tuesday temperatures will take an upward turn. Highs by Wednesday will be in the upper 70s to near 80 and should hold there through Memorial Day!.