Editor's Note: My son Liam earned his allowance by piecing this [paper copy] together for me. The CA map was custom generated from the CDF map server http://oak.cdf.ca.gov/ htdocs/cdf/text/gisdata.html. The peak- flow records came from one of the many great USGS pages http://water.wr.usgs.gov/flood97/. I've not located such data for other states, so here's just CA for now. See the satellite shot to glimpse what brought these rare peaks.

Click on the river name for which you would like to see the peak flows...

...and just in case the image map doesn't work on your browser....