A storm total rainfall maximum of 27.5 inches (700 mm) was recorded near Necaise, Mississippi.
By Wednesday morning, storm total rainfall amounts of 10 to 20 inches (250 to 510 mm) were common across portions of southeast Louisiana and south Mississippi.
The remains of the front served as a focusing axis for heavy precipitation that continued into the late morning hours of May 10.
The swath of highest rainfall totals was closely tied to a theta-e ridge at the 850 mb pressure surface, which stretched from the central Gulf of Mexico into the Mississippi River Delta area.
Some notable two-day totals from the National Weather Service archives and post-event surveys: For both waves of rainfall, several locations neared or exceeded 24‑hour rainfall amounts estimated as having a 1% chance of being exceeded in a given year, (100 year average recurrence interval) as determined by both the NOAA Atlas 14 and reports by the Southern Regional Climate Center.
Some politicians began to push for pumping rain waters directly into the Mississippi River, but environmental groups argued against this plan.