Generated at NCEP, from hourly radar precipitation estimates and
from hourly gauge reports. Generated at ~35 minutes after the
top of the hour, and again at T+6h and T+18h. No manual QC.
Mosaicked into a national product at NCEP, from the regional
hourly/6-hourly multi-sensor (radar+gauges) precipitation
analyses produced by the 12 River Forecast Centers (RFCs)
over CONUS. Some manual QC done at the RFCs. Mosaic done at NCEP
within an hour of receiving any new hourly/6-hourly data from one
or more RFC.
24h loops (there is a 2-day lag in image production)
24h accumulation (12Z-12Z) comparison:
Go to the model daily precipitation
verification page. Select a day, go to the bottom of that day's
page, where the Stage II/IV analysis are compared to the 1/8-degree
daily precipitation analysis (produced by CPC, based on the
7,000-8,000 daily gauge reports)
