The latest Northwest River Forecast Center update shows a number of rivers at flood stage...particularly over SW WA and NE Oregon....some at moderate flood. This is going to get worse before it gets better, since the latest run shift the precipitation more northward...which is confirmed by the Langley Hill radar.
Here is the latest hydrograph (past and future flow levels) for the Chehalis at Ground Mound from the NW River Forecast Center. They are going for 15.5 ft...substantially level than the all-time record (20.7 ft during the December 4, 2007 storm). I assume they are looking carefully at the Langley radar and updating their inputs regularly to their hydrological models. THIS is when the new radar will pay for itself.