Note
Go to the end to download the full example code.
Grid-Stat: Standard Verification of Surface Fields
model_applications/medium_range/GridStat_fcstGFS_obsGFS_Sfc_MultiField.conf
Scientific Objective
To provide useful statistical information on the relationship between observation data in gridded format to a gridded forecast. These values can be used to assess the skill of the prediction. Statistics stored only as partial sums to save space. Stat-Analysis must be used to compute Continuous Statistics.
Version Added
METplus version 3.0
Datasets
Forecast: NOAA Global Forecast System (GFS)
Observation: NOAA Global Forecast System (GFS)
Climatology: None
Location: All of the input data required for this use case can be found in a sample data tarball. Each use case category will have one or more sample data tarballs. It is only necessary to download the tarball with the use case’s dataset and not the entire collection of sample data. Click here to access the METplus releases page and download sample data for the appropriate release: https://github.com/dtcenter/METplus/releases This tarball should be unpacked into the directory that you will set the value of INPUT_BASE. See Running METplus section for more information.
METplus Components
This use case utilizes the METplus GridStat wrapper to search for files that are valid at a given run time and generate a command to run the MET tool grid_stat if all required files are found.
METplus Workflow
Beginning time (VALID_BEG): 2017061300
End time (VALID_END): 2017061306
Increment between beginning and end times (VALID_INCREMENT): 21600
Sequence of forecast leads to process (LEAD_SEQ): 24
GridStat is the only tool called in this example. It processes the following run times:
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, i.e. parm/use_cases/model_applications/medium_range/GridStat_fcstGFS_obsGFS_Sfc_MultiField.conf
[config]
# Documentation for this use case can be found at
# https://metplus.readthedocs.io/en/latest/generated/model_applications/medium_range/GridStat_fcstGFS_obsGFS_Sfc_MultiField.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 = 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 = VALID
VALID_TIME_FMT = %Y%m%d%H
VALID_BEG = 2017061300
VALID_END = 2017061306
VALID_INCREMENT = 21600
LEAD_SEQ = 24
###
# File I/O
# https://metplus.readthedocs.io/en/latest/Users_Guide/systemconfiguration.html#directory-and-filename-template-info
###
FCST_GRID_STAT_INPUT_DIR = {INPUT_BASE}/model_applications/medium_range/grid_to_grid/gfs/fcst
FCST_GRID_STAT_INPUT_TEMPLATE = pgbf{lead?fmt=%HHH}.gfs.{init?fmt=%Y%m%d%H}
OBS_GRID_STAT_INPUT_DIR = {INPUT_BASE}/model_applications/medium_range/grid_to_grid/gfs/fcst
OBS_GRID_STAT_INPUT_TEMPLATE = pgbf000.gfs.{valid?fmt=%Y%m%d%H}
GRID_STAT_OUTPUT_DIR = {OUTPUT_BASE}/met_out/{MODEL}/sfc
GRID_STAT_OUTPUT_TEMPLATE = {valid?fmt=%Y%m%d%H%M}/grid_stat
###
# Field Info
# https://metplus.readthedocs.io/en/latest/Users_Guide/systemconfiguration.html#field-info
###
BOTH_VAR1_NAME = TMP
FCST_VAR1_OPTIONS = GRIB_lvl_typ = 105;
BOTH_VAR1_LEVELS = Z2
BOTH_VAR2_NAME = RH
FCST_VAR2_OPTIONS = GRIB_lvl_typ = 105;
BOTH_VAR2_LEVELS = Z2
BOTH_VAR3_NAME = SPFH
FCST_VAR3_OPTIONS = GRIB_lvl_typ = 105;
BOTH_VAR3_LEVELS = Z2
BOTH_VAR4_NAME = HPBL
FCST_VAR4_OPTIONS = GRIB_lvl_typ = 01;
BOTH_VAR4_LEVELS = L0
BOTH_VAR5_NAME = PRES
FCST_VAR5_OPTIONS = GRIB_lvl_typ = 01;
BOTH_VAR5_LEVELS = Z0
BOTH_VAR6_NAME = PRMSL
FCST_VAR6_OPTIONS = GRIB_lvl_typ = 102;
BOTH_VAR6_LEVELS = L0
BOTH_VAR7_NAME = TMP
FCST_VAR7_OPTIONS = GRIB_lvl_typ = 01;
BOTH_VAR7_LEVELS = Z0
BOTH_VAR8_NAME = UGRD
FCST_VAR8_OPTIONS = GRIB_lvl_typ = 105;
BOTH_VAR8_LEVELS = Z10
BOTH_VAR9_NAME = VGRD
FCST_VAR9_OPTIONS = GRIB_lvl_typ = 105;
BOTH_VAR9_LEVELS = Z10
BOTH_VAR10_NAME = TSOIL
FCST_VAR10_OPTIONS = GRIB_lvl_typ = 112;
BOTH_VAR10_LEVELS = Z0-10
BOTH_VAR11_NAME = SOILW
FCST_VAR11_OPTIONS = GRIB_lvl_typ = 112;
BOTH_VAR11_LEVELS = Z0-10
BOTH_VAR12_NAME = WEASD
FCST_VAR12_OPTIONS = GRIB_lvl_typ = 01;
BOTH_VAR12_LEVELS = Z0
BOTH_VAR13_NAME = CAPE
FCST_VAR13_OPTIONS = GRIB_lvl_typ = 01;
BOTH_VAR13_LEVELS = Z0
BOTH_VAR14_NAME = CWAT
FCST_VAR14_OPTIONS = GRIB_lvl_typ = 200;
BOTH_VAR14_LEVELS = L0
BOTH_VAR15_NAME = PWAT
FCST_VAR15_OPTIONS = GRIB_lvl_typ = 200;
BOTH_VAR15_LEVELS = L0
BOTH_VAR16_NAME = TMP
FCST_VAR16_OPTIONS = GRIB_lvl_typ = 07;
BOTH_VAR16_LEVELS = L0
BOTH_VAR17_NAME = HGT
FCST_VAR17_OPTIONS = GRIB_lvl_typ = 07;
BOTH_VAR17_LEVELS = L0
BOTH_VAR18_NAME = TOZNE
FCST_VAR18_OPTIONS = GRIB_lvl_typ = 200;
BOTH_VAR18_LEVELS = L0
###
# GridStat Settings
# https://metplus.readthedocs.io/en/latest/Users_Guide/wrappers.html#gridstat
###
MODEL = GFS
OBTYPE = ANLYS
GRID_STAT_OUTPUT_PREFIX = {MODEL}_{CURRENT_FCST_NAME}_vs_{OBTYPE}_{CURRENT_OBS_NAME}_{CURRENT_FCST_LEVEL}
GRID_STAT_REGRID_TO_GRID = G002
GRID_STAT_REGRID_METHOD = BILIN
GRID_STAT_REGRID_WIDTH = 2
GRID_STAT_MASK_POLY = {INPUT_BASE}/model_applications/medium_range/poly/NHX.nc,
{INPUT_BASE}/model_applications/medium_range/poly/SHX.nc,
{INPUT_BASE}/model_applications/medium_range/poly/N60.nc,
{INPUT_BASE}/model_applications/medium_range/poly/S60.nc,
{INPUT_BASE}/model_applications/medium_range/poly/TRO.nc,
{INPUT_BASE}/model_applications/medium_range/poly/NPO.nc,
{INPUT_BASE}/model_applications/medium_range/poly/SPO.nc,
{INPUT_BASE}/model_applications/medium_range/poly/NAO.nc,
{INPUT_BASE}/model_applications/medium_range/poly/SAO.nc,
{INPUT_BASE}/model_applications/medium_range/poly/CONUS.nc,
{INPUT_BASE}/model_applications/medium_range/poly/CAM.nc,
{INPUT_BASE}/model_applications/medium_range/poly/NSA.nc
GRID_STAT_CLIMO_CDF_WRITE_BINS = False
GRID_STAT_OUTPUT_FLAG_SL1L2 = 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_GRID_WEIGHT_FLAG = COS_LAT
GRID_STAT_CLIMO_MEAN_TIME_INTERP_METHOD = NEAREST
GRID_STAT_CLIMO_MEAN_REGRID_METHOD = BILIN
GRID_STAT_CLIMO_MEAN_REGRID_WIDTH = 2
GRID_STAT_CLIMO_MEAN_DAY_INTERVAL = 1
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
GridStatConfig_wrapped
////////////////////////////////////////////////////////////////////////////////
//
// 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 =
${METPLUS_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}
${METPLUS_FCST_CLIMO_MEAN_DICT}
${METPLUS_FCST_CLIMO_STDEV_DICT}
}
obs = {
${METPLUS_OBS_FILE_TYPE}
${METPLUS_OBS_FIELD}
${METPLUS_OBS_CLIMO_MEAN_DICT}
${METPLUS_OBS_CLIMO_STDEV_DICT}
}
////////////////////////////////////////////////////////////////////////////////
//
// 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 = {
${METPLUS_GRADIENT_DICT}
////////////////////////////////////////////////////////////////////////////////
//
// Distance Map statistics
// May be set separately in each "obs.field" entry
//
//distance_map = {
${METPLUS_DISTANCE_MAP_DICT}
////////////////////////////////////////////////////////////////////////////////
// Threshold for SEEPS p1 (Probability of being dry)
//seeps_p1_thresh =
${METPLUS_SEEPS_P1_THRESH}
////////////////////////////////////////////////////////////////////////////////
//
// 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}
////////////////////////////////////////////////////////////////////////////////
//ugrid_dataset =
${METPLUS_UGRID_DATASET}
//ugrid_max_distance_km =
${METPLUS_UGRID_MAX_DISTANCE_KM}
//ugrid_coordinates_file =
${METPLUS_UGRID_COORDINATES_FILE}
////////////////////////////////////////////////////////////////////////////////
//grid_weight_flag =
${METPLUS_GRID_WEIGHT_FLAG}
tmp_dir = "${MET_TMP_DIR}";
// output_prefix =
${METPLUS_OUTPUT_PREFIX}
////////////////////////////////////////////////////////////////////////////////
${METPLUS_TIME_OFFSET_WARNING}
${METPLUS_MET_CONFIG_OVERRIDES}
Python Embedding
This use case does not use Python embedding.
User Scripting
User Scripting is not used in this use case.
Running METplus
Pass the use case configuration file to the run_metplus.py script along with any user-specific system configuration files if desired:
run_metplus.py /path/to/METplus/parm/use_cases/model_applications/medium_range/GridStat_fcstGFS_obsGFS_Sfc_MultiField.conf /path/to/user_system.conf
See Running METplus for more information.
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 met_out/{MODEL}/sfc (relative to OUTPUT_BASE) and will contain the following files:
00Z/GFS/GFS_20170613.stat
06Z/GFS/GFS_20170613.stat
Keywords
Note
GridStatToolUseCase
MediumRangeAppUseCase
GRIBFileUseCase
NOAAEMCOrgUseCase
ClimatologyUseCase
Navigate to the METplus Quick Search for Use Cases page to discover other similar use cases.
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