Skip Navigation Links www.nws.noaa.gov 
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 -start_ft, -start_FT, -end_ft, -end_FT
 

wgrib2: -start_ft, -start_FT, -end_ft, -end_FT

Introduction

Suppose you make a forecast starting from initial conditions of 00Z January 1 for the average conditions from the month of February. In this forecast, there are three time stamps.

   Name                        date           YYYYMMDDHH option  (HH)Z(DD)(MON)YYYY option      with minutes and seconds

   reference time              00Z Jan 1     -t                  -v2 -t                         -T
   start of forecast period    00Z Feb 1     -start_ft           -v2 -start_ft                  -start_FT
   end of forecast period      00Z Mar 1     -end_ft             -v2 -end_ft                    -end_FT
For common ftimes,

analysis:                      reference time == start_ft == end_ft
6 hour forecast:               reference time + 6 == start_ft == end_ft
30 year monthly climatology:   reference time = start_ft = start of 1st month used to make climatology
                               end_ft = end of the last month used to make the climatology

Usage

-start_ft
-end_ft
-start_FT
-end_FT

Example

$ wgrib2 a.grb -start_ft
1:0:start_FT=20111101000000
See also:

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