The storm can be moved to a new position through controls available in the HEC-MetVue toolbar, and the storm TIN can be edited interactively using value adjustment and TIN point add/remove options. For the HMR52 analysis, only the TIN translate and rotate tools are applicable.
The figures below illustrate moving the storm to a new position and differences in resulting storm sizes and volumes produced over the basin.
In this example, the computed optimal storm size for the new spatially shifted and rotated alignment was three times greater than the original default alignment. Additionally, the precipitation volumes from the shifted storm are greater near the new storm center position closer to the outlet of the basin.
The HEC-MetVue rotate storm tool has different options to choose from for the rotation pivot point:
