If necessary, follow steps 2-7 in Session 1 to rebuild and rerun the baseline case. This should only be necessary if files in the workflow have been deleted.

Data is available for several different weather scenarios.  Additional data may be downloaded and staged in your working directory, as described in the Users Guide.

First, to save any previous runs that you have completed, move that run directory to another location.  Start from your case directory,

Then, set the new run date (and init time if needed), again from your case directory:

For a severe storm case:

For Hurricane Barry: 

And, submit the new run using

Follow Session 1, step 7 to visualize the output.

There are 4 global resolutions supported by the UFS Medium Range Weather App.  For this training session, please use only the C96 or C192, due to computational (and classtime) limits.  The model resolution is specified with the “--res” option to the create_newcase command.

Starting at Step #3 from the Day 1 exercises, select a different resolution.  You can query available grid resolutions by:

Select a C192 grid, and create the new case directory:

Then, continue with the instructions for Steps #4-7 from Day 1.

Physics parameterizations for the UFS Medium Range Weather App are selected with a Suite Definition File, used by the ufs-weather-model.  This is configured as part of the “comp set” for a case.  The physics suite is specified with the “--compset” option to the create_newcase command.

Starting at Step #3 from the Session 1 exercises, select a different physics suite.  You can query available compsets by:

The Medium Range Weather App supports the two listed GFS suites, so select the GFSv16beta for this experiment:

Change to the new case directory:

Then, continue with the instructions for Session 1:  Steps #4-7.

Change input format from “grb2” to “nemsio” or “netCDF”

The MR Weather App requires numerous input files. The input files data format can be GRIB2, NEMSIO, or netCDF, and the input files must be staged by the user.  More information can be found in the Users Guide at: https://ufs-mrweather-app.readthedocs.io/en/ufs-v1.1.0/inputs_outputs.html

The input file data format is set using namelist parameters.

Repeat (or re-use) the case you built yesterday. 

Prior to Step #4, edit the file user_nl_ufsatm and add one of the following:

or

NOTE:  NetCDF formatted input files are ONLY available for the 20200202 case, so be sure to set the run start date if you select the netcdf input option.  Also, the netcdf input processing requires more memory, so adjust the processors-per-node as follows:

And, submit the new run, using:

In this exercise, you will set up and build the baseline case in a new directory, run it for 24 hours, then restart it and run for another 24 hours.

Start by creating a new case.

Note that the directory in $UFS_SCRATCH has the _restart suffix.

Continue, analogous to steps 3-5 of Session 1.

As before, it should take about 8 minutes to build the new case.  Once done, change a few variables:

Set runtime to 24 hours

Reduce wallclock time from 12 hours to 30 minutes

Turn off short term archiving 

For the Tutorial, there is a reserved queue:

Run the model for 24 hours

As before, you can use qstat to monitor your job's progress

If needed, you can kill your job:

When your initial job has completed, change CONTINUE_RUN to True

And the case will run for another 24 hours.

After it finishes, check your results with NCL:

To visualize the resulting images in png, use the command:

The sample plots are below. Click here to compare the restart run to the baseline run.