The brown area is the significant threshold. The yellow is an enhanced threat.
Here is the rainfall for the 24-hours ending at 7am.
These maps average rainfall over 2.5 x 2.5 mile squares. There were some point amounts yesterday evening in excess of 7 inches.
And, here is the rainfall for the last 7 days.
There is a small area of more than 15" north of Tulsa.
Here is a general summary of rivers in flood. Purple is major or record flooding.
And, more rain is on the way. Here is the flash flood outlook for the next 24 hours.
MDT = moderate risk. SLGT = slight risk.