Important: The Climate Analysis Branch (PSD1) web site will be down in anticipiation of our major web restructuring starting Tuesday Jan 20th at 1pm MST.
You can find more info about the upcoming URL changes here.
 

U.S. Daily Precipitation Analysis

DATA SOURCE: River Forecast Center ~5000 stations per day and Climate Anomaly Data Base ~several hundred stations per day

RESOLUTION: 0.25 degree x 0.25 degree

DOMAIN: 20 N - 60 N, 60 W - 140 W

WINDOW: Day 1 analysis is valid for the window from 12Z on day 0 to 12Z on day 1

ANALYSIS SCHEME: Modified Cressman (1959) Scheme (Glahn et al. 1985; Charba et al. 1992). Minimum stations for analysis: 500 for precipitation, 350 for temperature. If the number of stations is less than the minimum, then the analysis is not performed for that day.

QUALITY CONTROL:
  • A. Duplicate Station Check
  • B. Data Check ( buddy check, standard deviation check against climatology )
  • C. NEXRAD check for spurious zeros

    • WEB SITE: http://www.cpc.ncep.noaa.gov/products/precip/realtime/