Skip Navigation Links 
NOAA logo - Click to go to the NOAA home page National Weather Service   NWS logo - Click to go to the NWS home page
Climate Prediction Center

About Us
   Our Mission
   Who We Are

Contact Us
   CPC Information
   CPC Web Team

HOME > Monitoring_and_Data > Oceanic and Atmospheric Data > Reanalysis: Atmospheric Data > wgrib2-ftime

wgrib2: -ftime


The -ftime option nominally prints the Forecast TIME. It will print the forecast time, accumulation period, etc.


There are two types of simple time stamps, simple ones like a
  • analysis, anl
  • 12 hour forecast, 12 hr fcst
The next step up is a single statistical processing which involves a statistical operator (such as average, accumulation, maximum) and one or more fields. Examples are
  • average (00Z analysis, 06Z analysis, 12Z analysis, 18Z analysis), 4@6 hr ave(anl)
  • average (analysis, 6 hr fcst, 12 hr fcst, 18 hr fcst), 0-18 hr ave(fcst,dt=6 hr)
  • average (every forecast time step from 6 to 12 hours), 6-12 hour ave fcst

The next step is where you have multiple statistical processing steps. For example, you have the precipitation over 6 hour which involves a single statistical processing step. Now you take the monthly mean of that. That involves two statistical processing steps. Now if you take make a 30-year climatology, then you need 3 statistical processing steps.

It was noted that the old ftime had problems with the more complicated time stamps and ftime2 was developed to be an eventual replacement. Similarily set_ftime2 was developed to replace the old set_ftime/set_ave options.




$ wgrib2 grib2.polar -ftime
1.1:0:24 hour fcst
1.2:0:24 hour fcst
See also: -vt

NOAA/ National Weather Service
National Centers for Environmental Prediction
Climate Prediction Center
5830 University Research Court
College Park, Maryland 20740
Climate Prediction Center Web Team
Page last modified: May 15, 2005
Disclaimer Privacy Policy