“Error: Data not found” error msg for GFS 1.0

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Khammir
Posts: 2
Joined: Sat Mar 28, 2020 9:08 am

“Error: Data not found” error msg for GFS 1.0

Post by Khammir » Sat Mar 28, 2020 11:13 am


Hi everyone
I tested GFS 1.0 for 48 hour forecast, but ungrib.exe just work only for 00, 06, 12, 18, 24. When ungrib.exe riches to 30h data of GFS 1.0 the the following error shown:

ERROR: Data not found:

It should be noted that this problem just comes with GFS1.0 and 0.5 and 0.25 work finely.
Anyone can test and help me to solve this problem.

Thanks

Ming Chen
Posts: 1101
Joined: Mon Apr 23, 2018 9:42 pm

Re: “Error: Data not found” error msg for GFS 1.0

Post by Ming Chen » Thu Apr 16, 2020 7:34 pm

You need to download the GFS files that cover the entire period of your forecast. For example, suppose you initialize your forecast at 2017-02-01_00 UTC, you need the following GFS data for a 48-hour FCST:
gfs.0p25.2017020100.f000.grib
gfs.0p25.2017020100.f006.grib
gfs.0p25.2017020100.f012.grib
gfs.0p25.2017020100.f018.grib
gfs.0p25.2017020100.f024.grib
gfs.0p25.2017020100.f030.grib
gfs.0p25.2017020100.f036.grib
gfs.0p25.2017020100.f042.grib
gfs.0p25.2017020100.f048.grib
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skew_t_pie
Posts: 12
Joined: Tue May 12, 2020 9:03 pm

Re: “Error: Data not found” error msg for GFS 1.0

Post by skew_t_pie » Fri May 22, 2020 8:53 pm

Sorry as I am still learning WRF, but aside from more detailed simulations or running a forecast to compare with older forecasts for error (say replicating Hurricane Katrina and running the simulation to compare with initial forecast data), you can't run a simulation past a certain date? In other words if you want to initialize the model with the latest GFS run (let's say 2020-05-22-18:00), you can't produce a forecast that simulates ahead of the current date such as tomorrow at 18z?

Edit: I suppose you can use a GFS forecast or something for a time that is valid for a future date

Ming Chen
Posts: 1101
Joined: Mon Apr 23, 2018 9:42 pm

Re: “Error: Data not found” error msg for GFS 1.0

Post by Ming Chen » Fri May 22, 2020 9:17 pm

That is not true. Forecast products of GFS can be used to drive WRF for real-time weather forecast.
For example, suppose GFS produces 5-dat forecast data from 0000 UTC 22 May, then you will be able to obtain GFS data for the next 5 days, e.g.,
gfs.0p25.2017052200.f000.grib
gfs.0p25.2017052200.f006.grib
gfs.0p25.2017052200.f012.grib
gfs.0p25.2017052200.f018.grib
gfs.0p25.2017052200.f024.grib => corresponding to 2017052300
....
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raffyjef
Posts: 1
Joined: Sun Sep 06, 2020 11:40 pm

Re: “Error: Data not found” error msg for GFS 1.0

Post by raffyjef » Mon Sep 07, 2020 12:11 am

Did you already fixed this problem? I am also having the same issue. Thank you!

Ming Chen
Posts: 1101
Joined: Mon Apr 23, 2018 9:42 pm

Re: “Error: Data not found” error msg for GFS 1.0

Post by Ming Chen » Mon Sep 14, 2020 5:03 pm

Please type the command:
ncdump -v Times wrfbdy_d01,
and you will find how many times of boundary forcing you have. This will also tell whether your integration time period is beyond the period your boundary forcing data are available.
WRF Help Desk

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