You can find the node flood or surcharge maximum occurrence during a simulation in the Junction Summary Report table in InfoSWMM and H2OMAP SWMM (Figure 1)
Empty if the Node Head is below or equal to the Lowest Link Connecting Elevation
Below Link Crown if the Node Head is below or equal to the Highest Link Connecting Crown
Below Maximum Depth if the Node Head is below or equal to the Node Invert + Full Depth. The column Max Surcharge Height above Crown will also tell you how deep the Surcharge in a Node.
Surchaged if none of the above is true.
Figure 1. Junction Summary Report in InfoSWMM
Figure 2. Maximum Surcharge Height above Crown Definition