Flash Flooding Potential
In the Excessive Rainfall Outlooks, the Weather Prediction Center (WPC) forecasts the probability that rainfall will exceed flash flood guidance (FFG) within 40 kilometers (25 miles) of a point.
You can access downloadable shape and KML files on the NOAA Weather Prediction Page for Excessive Rainfall
Additional Resource Links
County Rainfall Maps
Los Angeles County Department of Public Works Rainfall Map (note the Rainfall Data Viewer for this map currently has a scheduled maintenance for 9pm Friday, Sept 9 through 5am Saturday, Sept 10)
GIS Data Resources
NWS Wether Prediction Center Excessive Rainfall Forecast (GIS file links are to the left of the map)