Figure 2 This is a Basin Trend. Please take time to examine this trend to fully understand what it is showing. The "Rate" plot represents the 'instantaneous' rate determined from the DHR radar products, backward in time. The "Accum" represents the precipitation accumulation for the specified number of hours in the past to the most recent data time. The "FFG" plot is the valid Flash Flood Guidance for the specified time frame (not the number of hours in the past), thus the comparability to the accumulation plot.