pcp_combine to sum snow amounts

[craigr3]

How do I use METPLUS pcp_combine to sum up 3 hourly snow amounts to a 24 hour period? Is there a way to change GRIB variable from APCP to SNWFL ( the grib2 code we use for snowfall).

[CPKalb]

Hi Craig:

Here is an example using the Pcp-Combine sum option. If your data is observations, you would want to change everything that says "FCST" to "OBS." To get this to work for 3 hourly snow amounts, you would to change the following:

FCST_PCP_COMBINE_INPUT_ACCUMS = 3
FCST_PCP_COMBINE_INPUT_NAMES = SNWFL

FCST_PCP_COMBINE_OUTPUT_ACCUM = 24
FCST_PCP_COMBINE_OUTPUT_NAME = whatever you want to name the output variable

You will also need to change FCST_PCP_COMBINE_INPUT_LEVELS. However, I would need to see the output from wgrib2 to know what this variable should be set to. Additionally, you would need to set FCST_PCP_COMBINE_INPUT_DIR to your input file directory, and FCST_PCP_COMBINE_INPUT_TEMPLATE to your input file name, with timing templates.

Christina

[craigr3]

Christina, thanks for responding so fast.  That was the info I needed.Sent from my Verizon, Samsung Galaxy smartphone -------- Original message --------From: Christina Kalb ***@***.***> Date: 4/13/23 10:06 PM (GMT-06:00) To: dtcenter/METplus ***@***.***> Cc: craigr3 ***@***.***>, Author ***@***.***> Subject: Re: [dtcenter/METplus] pcp_combine to sum snow amounts (Discussion #2121) Hi Craig: Here is an example using the Pcp-Combine sum option. If your data is observations, you would want to change everything that says "FCST" to "OBS." To get this to work for 3 hourly snow amounts, you would to change the following: FCST_PCP_COMBINE_INPUT_ACCUMS = 3 FCST_PCP_COMBINE_INPUT_NAMES = SNWFL FCST_PCP_COMBINE_OUTPUT_ACCUM = 24 FCST_PCP_COMBINE_OUTPUT_NAME = whatever you want to name the output variable You will also need to change FCST_PCP_COMBINE_INPUT_LEVELS. However, I would need to see the output from wgrib/wgrib2 to know what this variable should be set to. Additionally, you would need to set FCST_PCP_COMBINE_INPUT_DIR to your input file directory, and FCST_PCP_COMBINE_INPUT_TEMPLATE to your input file name, with timing templates. Christina —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you authored the thread.Message ID: ***@***.***>

[CPKalb]

Great. I'm going to mark this as answered and lock it to prevent future posts. If you have more questions, feel free to start a new discussion.

Christina