Note

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Grid-Stat: 6hr QPF in NetCDF format

model_applications/precipitation/GridStat_fcstHREFmean _obsStgIV_Netcdf.conf

Scientific Objective

Evaluate the skill of a high resolution multi-model ensemble mean at predicting 6 hour precipitation accumulation using the NCEP Stage IV gauge corrected analysis.

Datasets

Describe the datasets here. Relevant information about the datasets that would be beneficial include:

  • Forecast dataset: HREF mean forecasts in NetCDF

  • Observation dataset: Stage IV GRIB 6 hour precipitation accumulation

METplus Components

This use case first runs PCPCombine on the forecast data to build a 6 hour precipitation accumulation from 1 hour files or a single 6 hour file. Then the observation data is regridded to the model grid using the RegridDataPlane. Finally, the observation files are compared to the forecast data using GridStat.

METplus Workflow

The following tools are used for each run time: PCPCombine (observation) > RegridDataPlane (observation) > GridStat

This example loops by initialization time. There is only one initalization time in this example so the following will be run:

Run times:

Init: 2017-05-09_12Z
Forecast lead: 18

METplus Configuration

METplus first loads all of the configuration files found in parm/metplus_config, then it loads any configuration files passed to METplus via the command line with the -c option, i.e. -c parm/use_cases/model_applications/precipitation/GridStat_fcstHREFmean_obsStgIV_NetCDF.conf

[config]

# Documentation for this use case can be found at
# https://metplus.readthedocs.io/en/latest/generated/model_applications/precipitation/GridStat_fcstHREFmean_obsStgIV_NetCDF.html

# For additional information, please see the METplus Users Guide.
# https://metplus.readthedocs.io/en/latest/Users_Guide

###
# Processes to run
# https://metplus.readthedocs.io/en/latest/Users_Guide/systemconfiguration.html#process-list
###

PROCESS_LIST = PCPCombine, RegridDataPlane, GridStat


###
# Time Info
# LOOP_BY options are INIT, VALID, RETRO, and REALTIME
# If set to INIT or RETRO:
#   INIT_TIME_FMT, INIT_BEG, INIT_END, and INIT_INCREMENT must also be set
# If set to VALID or REALTIME:
#   VALID_TIME_FMT, VALID_BEG, VALID_END, and VALID_INCREMENT must also be set
# LEAD_SEQ is the list of forecast leads to process
# https://metplus.readthedocs.io/en/latest/Users_Guide/systemconfiguration.html#timing-control
###

LOOP_BY = INIT
INIT_TIME_FMT = %Y%m%d%H
INIT_BEG=2017050912
INIT_END=2017050912
INIT_INCREMENT=43200

LEAD_SEQ = 18


###
# File I/O
# https://metplus.readthedocs.io/en/latest/Users_Guide/systemconfiguration.html#directory-and-filename-template-info
###

FCST_PCP_COMBINE_RUN = True

FCST_PCP_COMBINE_INPUT_DIR = {INPUT_BASE}/model_applications/precipitation/HREFv2_Mean
FCST_PCP_COMBINE_INPUT_TEMPLATE = {init?fmt=%Y%m%d}/hrefmean_{init?fmt=%Y%m%d%H}f{lead?fmt=%HHH}.nc

FCST_PCP_COMBINE_OUTPUT_DIR = {OUTPUT_BASE}/model_applications/precipitation/GridStat_fcstHREFmean_obsStgIV_NetCDF/HREFv2_Mean/bucket
FCST_PCP_COMBINE_OUTPUT_TEMPLATE = {valid?fmt=%Y%m%d}/hrefmean_{valid?fmt=%Y%m%d%H}_A{level?fmt=%HH}.nc


OBS_REGRID_DATA_PLANE_RUN = True

OBS_REGRID_DATA_PLANE_INPUT_DIR = {INPUT_BASE}/model_applications/precipitation/StageIV
OBS_REGRID_DATA_PLANE_INPUT_TEMPLATE = {valid?fmt=%Y%m%d?shift=-12H}12_st4.nc

OBS_REGRID_DATA_PLANE_OUTPUT_DIR = {OUTPUT_BASE}/model_applications/precipitation/GridStat_fcstHREFmean_obsStgIV_NetCDF/StageIV_netcdf/regrid
OBS_REGRID_DATA_PLANE_OUTPUT_TEMPLATE = {valid?fmt=%Y%m%d%H}_st4_A06.nc


FCST_GRID_STAT_INPUT_DIR = {FCST_PCP_COMBINE_OUTPUT_DIR}
FCST_GRID_STAT_INPUT_TEMPLATE = {valid?fmt=%Y%m%d}/hrefmean_{valid?fmt=%Y%m%d%H}_A06.nc

OBS_GRID_STAT_INPUT_DIR = {OBS_REGRID_DATA_PLANE_OUTPUT_DIR}
OBS_GRID_STAT_INPUT_TEMPLATE = {OBS_REGRID_DATA_PLANE_OUTPUT_TEMPLATE}

GRID_STAT_OUTPUT_DIR = {OUTPUT_BASE}/model_applications/precipitation/GridStat_fcstHREFmean_obsStgIV_NetCDF/GridStat
GRID_STAT_OUTPUT_TEMPLATE = {init?fmt=%Y%m%d%H%M}


###
# Field Info
# https://metplus.readthedocs.io/en/latest/Users_Guide/systemconfiguration.html#field-info
###

MODEL = HREF_MEAN
OBTYPE = STAGE4

FCST_VAR1_NAME = {FCST_PCP_COMBINE_OUTPUT_NAME}
FCST_VAR1_LEVELS = "(*,*)"
FCST_VAR1_THRESH = gt12.7, gt25.4, gt50.8, gt76.2, gt152.4

OBS_VAR1_NAME = {OBS_REGRID_DATA_PLANE_VAR1_OUTPUT_FIELD_NAME}
OBS_VAR1_LEVELS = "(*,*)"
OBS_VAR1_THRESH = gt12.7, gt25.4, gt50.8, gt76.2, gt152.4


OBS_REGRID_DATA_PLANE_VAR1_INPUT_FIELD_NAME = P06M_NONE
OBS_REGRID_DATA_PLANE_VAR1_INPUT_LEVEL = "({valid?fmt=%Y%m%d_%H%M%S},*,*)"

OBS_REGRID_DATA_PLANE_VAR1_OUTPUT_FIELD_NAME = P06M_NONE

###
# PCPCombine Settings
# https://metplus.readthedocs.io/en/latest/Users_Guide/wrappers.html#pcpcombine
###

FCST_PCP_COMBINE_METHOD = ADD

FCST_PCP_COMBINE_INPUT_DATATYPE = NETCDF

FCST_PCP_COMBINE_CONSTANT_INIT = true

FCST_PCP_COMBINE_INPUT_ACCUMS = 1
FCST_PCP_COMBINE_INPUT_NAMES = P01M_NONE
FCST_PCP_COMBINE_INPUT_LEVELS = "(0,*,*)"

FCST_PCP_COMBINE_OUTPUT_ACCUM = 6
FCST_PCP_COMBINE_OUTPUT_NAME = APCP_06

OBS_PCP_COMBINE_INPUT_DATATYPE = NETCDF


###
# RegridDataPlane Settings
# https://metplus.readthedocs.io/en/latest/Users_Guide/wrappers.html#regriddataplane
###

REGRID_DATA_PLANE_METHOD = BUDGET
REGRID_DATA_PLANE_WIDTH = 2

REGRID_DATA_PLANE_VERIF_GRID={INPUT_BASE}/model_applications/precipitation/mask/CONUS_HRRRTLE.nc


###
# GridStat Settings
# https://metplus.readthedocs.io/en/latest/Users_Guide/wrappers.html#gridstat
###

GRID_STAT_REGRID_TO_GRID = OBS

GRID_STAT_NEIGHBORHOOD_WIDTH = 3, 7, 15
GRID_STAT_NEIGHBORHOOD_SHAPE = SQUARE
GRID_STAT_NEIGHBORHOOD_COV_THRESH = >=0.5

GRID_STAT_OUTPUT_FLAG_CTC = STAT
GRID_STAT_OUTPUT_FLAG_CTS = STAT
GRID_STAT_OUTPUT_FLAG_DMAP = STAT

GRID_STAT_NC_PAIRS_FLAG_LATLON = FALSE
GRID_STAT_NC_PAIRS_FLAG_RAW = FALSE
GRID_STAT_NC_PAIRS_FLAG_DIFF = FALSE
GRID_STAT_NC_PAIRS_FLAG_CLIMO = FALSE
GRID_STAT_NC_PAIRS_FLAG_APPLY_MASK = FALSE
GRID_STAT_NC_PAIRS_FLAG_DISTANCE_MAP = TRUE

MET Configuration

METplus sets environment variables based on user settings in the METplus configuration file. See How METplus controls MET config file settings for more details.

YOU SHOULD NOT SET ANY OF THESE ENVIRONMENT VARIABLES YOURSELF! THEY WILL BE OVERWRITTEN BY METPLUS WHEN IT CALLS THE MET TOOLS!

If there is a setting in the MET configuration file that is currently not supported by METplus you’d like to control, please refer to: Overriding Unsupported MET config file settings

Note

See the GridStat MET Configuration section of the User’s Guide for more information on the environment variables used in the file below:

////////////////////////////////////////////////////////////////////////////////
//
// Grid-Stat configuration file.
//
// For additional information, see the MET_BASE/config/README file.
//
////////////////////////////////////////////////////////////////////////////////

//
// Output model name to be written
//
// model =
${METPLUS_MODEL}

//
// Output description to be written
// May be set separately in each "obs.field" entry
//
// desc =
${METPLUS_DESC}

//
// Output observation type to be written
//
// obtype =
${METPLUS_OBTYPE}

////////////////////////////////////////////////////////////////////////////////

//
// Verification grid
//
// regrid = {
${METPLUS_REGRID_DICT}

////////////////////////////////////////////////////////////////////////////////

//censor_thresh =
${METPLUS_CENSOR_THRESH}
//censor_val =
${METPLUS_CENSOR_VAL}
cat_thresh  	 = [];
cnt_thresh  	 = [ NA ];
cnt_logic   	 = UNION;
wind_thresh 	 = [ NA ];
wind_logic  	 = UNION;
eclv_points      = 0.05;
//nc_pairs_var_name =
${METPLUS_NC_PAIRS_VAR_NAME}
nc_pairs_var_suffix = "";
//hss_ec_value =
${METPLUS_HSS_EC_VALUE}

rank_corr_flag   = FALSE;

//
// Forecast and observation fields to be verified
//
fcst = {
  ${METPLUS_FCST_FILE_TYPE}
  ${METPLUS_FCST_FIELD}
}
obs = {
  ${METPLUS_OBS_FILE_TYPE}
  ${METPLUS_OBS_FIELD}
}

////////////////////////////////////////////////////////////////////////////////

//
// Climatology mean data
//
//climo_mean = {
${METPLUS_CLIMO_MEAN_DICT}


//climo_stdev = {
${METPLUS_CLIMO_STDEV_DICT}

//
// May be set separately in each "obs.field" entry
//
//climo_cdf = {
${METPLUS_CLIMO_CDF_DICT}

////////////////////////////////////////////////////////////////////////////////

//
// Verification masking regions
//
// mask = {
${METPLUS_MASK_DICT}

////////////////////////////////////////////////////////////////////////////////

//
// Confidence interval settings
//
ci_alpha  = [ 0.05 ];

boot = {
   interval = PCTILE;
   rep_prop = 1.0;
   n_rep    = 0;
   rng      = "mt19937";
   seed     = "";
}

////////////////////////////////////////////////////////////////////////////////

//
// Data smoothing methods
//
//interp = {
${METPLUS_INTERP_DICT}

////////////////////////////////////////////////////////////////////////////////

//
// Neighborhood methods
//
nbrhd = {
   field      = BOTH;
   // shape =
   ${METPLUS_NBRHD_SHAPE}
   // width =
   ${METPLUS_NBRHD_WIDTH}
   // cov_thresh =
   ${METPLUS_NBRHD_COV_THRESH}
   vld_thresh = 1.0;
}

////////////////////////////////////////////////////////////////////////////////

//
// Fourier decomposition
// May be set separately in each "obs.field" entry
//
//fourier = {
${METPLUS_FOURIER_DICT}

////////////////////////////////////////////////////////////////////////////////

//
// Gradient statistics
// May be set separately in each "obs.field" entry
//
gradient = {
   dx = [ 1 ];
   dy = [ 1 ];
}

////////////////////////////////////////////////////////////////////////////////

//
// Distance Map statistics
// May be set separately in each "obs.field" entry
//
//distance_map = {
${METPLUS_DISTANCE_MAP_DICT}

////////////////////////////////////////////////////////////////////////////////

//
// Statistical output types
//
//output_flag = {
${METPLUS_OUTPUT_FLAG_DICT}

//
// NetCDF matched pairs output file
// May be set separately in each "obs.field" entry
//
// nc_pairs_flag = {
${METPLUS_NC_PAIRS_FLAG_DICT}

////////////////////////////////////////////////////////////////////////////////
// Threshold for SEEPS p1 (Probability of being dry)

//seeps_p1_thresh =
${METPLUS_SEEPS_P1_THRESH}

////////////////////////////////////////////////////////////////////////////////

//grid_weight_flag =
${METPLUS_GRID_WEIGHT_FLAG}

tmp_dir = "${MET_TMP_DIR}";

// output_prefix =
${METPLUS_OUTPUT_PREFIX}

////////////////////////////////////////////////////////////////////////////////

${METPLUS_MET_CONFIG_OVERRIDES}

Running METplus

This use case can be run two ways:

  1. Passing in GridStat_fcstHREFmean_obsStgIV_NetCDF.conf then a user-specific system configuration file:

    run_metplus.py -c /path/to/METplus/parm/use_cases/model_applications/precipitation/GridStat_fcstHREFmean_obsStgIV_NetCDF.conf -c /path/to/user_system.conf

  2. Modifying the configurations in parm/metplus_config, then passing in GridStat_fcstHREFmean_obsStgIV_NetCDF.conf:

    run_metplus.py -c /path/to/METplus/parm/use_cases/model_applications/precipitation/GridStat_fcstHREFmean_obsStgIV_NetCDF.conf

The former method is recommended. Whether you add them to a user-specific configuration file or modify the metplus_config files, the following variables must be set correctly:

  • INPUT_BASE - Path to directory where sample data tarballs are unpacked (See Datasets section to obtain tarballs). This is not required to run METplus, but it is required to run the examples in parm/use_cases

  • OUTPUT_BASE - Path where METplus output will be written. This must be in a location where you have write permissions

  • MET_INSTALL_DIR - Path to location where MET is installed locally

Example User Configuration File:

[dir]
INPUT_BASE = /path/to/sample/input/data
OUTPUT_BASE = /path/to/output/dir
MET_INSTALL_DIR = /path/to/met-X.Y

NOTE: All of these items must be found under the [dir] section.

Expected Output

A successful run will output the following both to the screen and to the logfile:

INFO: METplus has successfully finished running.

Refer to the value set for OUTPUT_BASE to find where the output data was generated. Output for this use case will be found in model_applications/precipitation/GridStat_fcstHREFmean_obsStgIV_NetCDF/GridStat/201705091200 (relative to OUTPUT_BASE) and will contain the following files:

  • grid_stat_000000L_20170510_060000V_pairs.nc

  • grid_stat_000000L_20170510_060000V.stat

Keywords

Note

  • GridStatToolUseCase

  • PrecipitationAppUseCase

  • PCPCombineToolUseCase

  • RegridDataPlaneToolUseCase

  • NetCDFFileUseCase

  • NOAAWPCOrgUseCase

  • NOAAHMTOrgUseCase

  • NOAAHWTOrgUseCase

  • ConvectionAllowingModelsAppUseCase

Navigate to the METplus Quick Search for Use Cases page to discover other similar use cases.

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