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updates John O. suggested take 4 #1834.
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lisagoodrich committed Jul 30, 2021
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Showing 1 changed file with 14 additions and 15 deletions.
29 changes: 14 additions & 15 deletions met/docs/Users_Guide/appendixA.rst
Original file line number Diff line number Diff line change
Expand Up @@ -412,7 +412,7 @@ Setting vld_thresh = 1.0 will ensure that FSS will only be computed at
points where all NxN values contain valid data. Setting it to 0.5 only
requires half of them.

**Q. Grid-Stat - Is an example of verifying probabilities?**
**Q. Grid-Stat - Is an example of verifying forecast probabilities?**

A.
There is an example of verifying probabilities in the test scripts
Expand Down Expand Up @@ -595,32 +595,31 @@ Pcp-Combine
**Q. Pcp-Combine - How do I add and subtract with Pcp-Combine?**

A.
Run the MET pcp_combine tool to put the NAM data into 3-hourly accumulations.
An example of running the MET pcp_combine tool to put NAM 3-hourly
precipitation accumulations data into user-desired 3 hour intervals is
provided below.

0-3 hour accumulation is already in the 03 UTC file. Run this file
If the user wanted a 0-3 hour accumulation, this is already available
in the 03 UTC file. Run this file
through pcp_combine as a pass-through to put it into NetCDF format:

.. code-block:: none
[MET_BUILD_BASE}/pcp_combine -add 03_file.grb 03 APCP_00_03.nc
3-6 hour accumulation. Subtract 0-6 and 0-3 accumulations:
[MET_BUILD_BASE}/pcp_combine -subtract 06_file.grb 06 03_file.grb 03 APCP_03_06.nc
6-9 hour accumulation. Subtract 0-9 and 0-6 accumulations:
[MET_BUILD_BASE}/pcp_combine -subtract 09_file.grb 09 06_file.grb 06 APCP_06_09.nc
9-12 hour accumulation. Subtract 0-12 and 0-9 accumulations:
[MET_BUILD_BASE}/pcp_combine -subtract 12_file.grb 12 09_file.grb 09 APCP_09_12.nc
12-15 hour accumulation. Just run as a pass-through again:
If the user wanted the 3-6 hour accumulation, they would subtract
0-6 and 0-3 accumulations:

.. code-block:: none
[MET_BUILD_BASE}/pcp_combine -subtract 06_file.grb 06 03_file.grb 03 APCP_03_06.nc
[MET_BUILD_BASE}/pcp_combine -add 15_file.grb 03 APCP_12_15.nc
Similarly, if they wanted the 6-9 hour accumulation, they would
subtract 0-9 and 0-6 accumulations:

15-18 hour accumulation. Subtract 12-18 and 12-15 accumulations:
.. code-block:: none
.. code-block:: none
[MET_BUILD_BASE}/pcp_combine -subtract 18_file.grb 06 15_file.grb 03 APCP_15_18.nc
[MET_BUILD_BASE}/pcp_combine -subtract 09_file.grb 09 06_file.grb 06 APCP_06_09.nc
And so on.

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