This page provides links to observation datasets that may be of interest to you.

Gridded Observations Of Precipitation

• NCEP National StageII Precipitation Analysis: StageII Precipitation
• NCEP National StageIV Precipitation Analysis: StageIV Precipitation
• NASA TRMM Precipitation Analysis: TOVAS
  • Near Real-Time 3-hour Accumulations: 3B42RT
  • Near Real-Time Daily Accumulations: 3B42RT derived
  • Archived 3-hour Accumulations: 3B42 V6
  • Archived Daily Accumulations: 3B42 V6 derived
  • Use the trmm2nc.R R-script to reformat this ASCII data into a NetCDF format that MET can read.

Gridded Analysis Products

• National Digital Forecast Database (NDFD): Real-Time Mesoscale Analysis (RTMA) Product
  NOTE: GRIB2 data must be converted to GRIB1 for use in MET.

PrepBufr Point Observations

• NCEP NOMADS Site:
  • PrepBufr for GDAS (Global) - 1 month buffer:
    http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod
  • PrepBufr for NDAS (North America) - 1 month buffer:
    http://nomads.ncep.noaa.gov/pub/data/nccf/com/nam/prod
• NCEP FTP Site:
  • PrepBufr for GDAS (Global) - 3 day buffer:
    ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod
  • PrepBufr for NDAS (North America) - 3 day buffer:
    ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/nam/prod
• NCDC NOMADS Site:
  • PrepBufr for GDAS (Global) - archive starting May 2007:
    http://nomads.ncdc.noaa.gov/data/gdas
    *** NOTE: The 18Z filenames are incorrect on this site. The date listed in the filename is one day later than the observations actually contained in the file. ***
• NCAR CISL Site:
  • DS337.0: NCEP ADP Global Upper Air and Surface Observations (PREPBUFR and NetCDF PB2NC Output) - archive starting May 1997:
    http://dss.ucar.edu/datasets/ds337.0
  • DS337.0 Subset: Interactive tool for running PB2NC over a specified time period and geographic region:
    http://dss.ucar.edu/datasets/ds337.0/forms/337_subset.php