Note
Click here to download the full example code
5.2.8.7. Grid-Stat: 6hr PQPF Probability Verification
model_applications/precipitation/GridStat_fcstHRRR _obsStgIV_GRIB.conf
Scientific Objective
This use case demonstrates the evaluation of a probabilistic field. The HRRR-Time Lag Ensemble (TLE) used in this example was used to demonstrate prototype ensemble post-processing techniques. A time-lagged ensemble can provide higher temporal resolution and be used to compute several different accumulation amounts based on what data is available for each run time. 6 hour and 1 hour observation data is available at 6Z, so the 6 hour accumulation data is used. However, at 7Z only a 1 hour accumulation field is available, so it uses the 1 hour field, then steps back in time trying to build a 6 hour accumulation with earlier data. METplus is configured to only allow 1 hour or 6 hour accumulations in the input files, so a set of six 1 hour accumulation fields are combined to create a 6 hour accumulation field. The result is compared to the 6 hour forecast data.
Datasets
Relevant information about the datasets that would be beneficial include:
Forecast dataset: HRRR-TLE probabilistic forecasts in GRIB2
Observation dataset: Stage IV GRIB 1 and 6 hour precipitation accumulation
METplus Components
This use case first runs PCPCombine on the observation 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. For each initialization time it will process forecast leads 6 and 7. There is only one initialization time in this example, so the following will be run:
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 with the -c option, i.e. -c parm/use_cases/model_applications/precipitation/GridStat_fcstHRRR-TLE_obsStgIV_GRIB.conf
# PHPT vs. StageIV Grib Configurations
[config]
# List of applications to run
PROCESS_LIST = PCPCombine, RegridDataPlane, GridStat
# time looping - options are INIT, VALID, RETRO, and REALTIME
LOOP_BY = INIT
# Format of INIT_BEG and INIT_END
INIT_TIME_FMT = %Y%m%d%H
# Start time for METplus run
INIT_BEG=2016090412
# End time for METplus run
INIT_END=2016090412
# Increment between METplus runs in seconds. Must be >= 60
INIT_INCREMENT=60
# list of forecast leads to process
LEAD_SEQ = 6, 7
# Options are times, processes
# times = run all items in the PROCESS_LIST for a single initialization
# time, then repeat until all times have been evaluated.
# processes = run each item in the PROCESS_LIST for all times
# specified, then repeat for the next item in the PROCESS_LIST.
LOOP_ORDER = times
# run pcp_combine on observation data
OBS_PCP_COMBINE_RUN = True
# method to run pcp_combine on observation data
# Options are ADD, SUM, SUBTRACT, and DERIVE
OBS_PCP_COMBINE_METHOD = ADD
# run regrid_data_plane on observation data
OBS_REGRID_DATA_PLANE_RUN = True
# method to run regrid_data_plane, not setting this will default to NEAREST
REGRID_DATA_PLANE_METHOD = BUDGET
# regridding width used in regrid_data_plane, not setting this will default to 1
REGRID_DATA_PLANE_WIDTH = 2
# list of variables to compare
BOTH_VAR1_NAME = APCP
BOTH_VAR1_LEVELS = A06
BOTH_VAR1_THRESH = gt12.7, gt25.4, gt50.8, gt76.2, gt152.4
# description of data to be processed
# used in output file path
MODEL = PHPT
OBTYPE = STAGE4_GRIB
# mask to use for regridding
REGRID_DATA_PLANE_VERIF_GRID = {INPUT_BASE}/model_applications/precipitation/mask/CONUS_HRRRTLE.nc
# location of grid_stat MET config file
GRID_STAT_CONFIG_FILE = {PARM_BASE}/met_config/GridStatConfig_wrapped
GRID_STAT_OUTPUT_PREFIX = PROB_{MODEL}_{CURRENT_FCST_NAME}_vs_{OBTYPE}_{CURRENT_OBS_NAME}_{CURRENT_FCST_LEVEL}
GRID_STAT_MASK_GRID =
GRID_STAT_OUTPUT_FLAG_PCT = BOTH
GRID_STAT_OUTPUT_FLAG_PSTD = BOTH
GRID_STAT_OUTPUT_FLAG_PJC = BOTH
GRID_STAT_OUTPUT_FLAG_PRC = BOTH
GRID_STAT_OUTPUT_FLAG_ECLV = 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
# PHPT Model Options:
# Set to true if forecast data is probabilistic
FCST_IS_PROB = true
# True if probabilistic information is in the GRIB Product Definition Section
FCST_PROB_IN_GRIB_PDS = True
# Set to true if forecast files are generated once per day
FCST_PCP_COMBINE_IS_DAILY_FILE = false
# Stage4 Grib Observation Data Parameters:
# Data type of observation data read by pcp_combine
# valid options are GRIB, NETCDF, and GEMPAK
OBS_PCP_COMBINE_INPUT_DATATYPE = GRIB
# Set to true if observation files are generated once per day
OBS_PCP_COMBINE_IS_DAILY_FILE = false
OBS_PCP_COMBINE_INPUT_ACCUMS = 6, 1
[dir]
# input and output data directories for each application in PROCESS_LIST
FCST_GRID_STAT_INPUT_DIR = {INPUT_BASE}/model_applications/precipitation/PHPT
OBS_PCP_COMBINE_INPUT_DIR = {INPUT_BASE}/model_applications/precipitation/StageIV
OBS_PCP_COMBINE_OUTPUT_DIR = {OUTPUT_BASE}/model_applications/precipitation/GridStat_fcstHRRR-TLE_obsStgIV_GRIB/StageIV_grib/bucket
OBS_REGRID_DATA_PLANE_INPUT_DIR = {OBS_PCP_COMBINE_OUTPUT_DIR}
OBS_REGRID_DATA_PLANE_OUTPUT_DIR = {OUTPUT_BASE}/model_applications/precipitation/GridStat_fcstHRRR-TLE_obsStgIV_GRIB/StageIV_grib/regrid
OBS_GRID_STAT_INPUT_DIR = {OBS_REGRID_DATA_PLANE_OUTPUT_DIR}
GRID_STAT_OUTPUT_DIR = {OUTPUT_BASE}/model_applications/precipitation/GridStat_fcstHRRR-TLE_obsStgIV_GRIB/GridStat
[filename_templates]
# format of filenames
# PHPT
FCST_GRID_STAT_INPUT_TEMPLATE= {init?fmt=%Y%m%d}/{init?fmt=%Y%m%d}_i{init?fmt=%H}_f{lead?fmt=%HHH}_HRRRTLE_PHPT.grb2
# StageIV Grib
OBS_PCP_COMBINE_INPUT_TEMPLATE = {valid?fmt=%Y%m%d}/ST4.{valid?fmt=%Y%m%d%H}.{level?fmt=%HH}h
OBS_PCP_COMBINE_OUTPUT_TEMPLATE = {valid?fmt=%Y%m%d}/ST4.{valid?fmt=%Y%m%d%H}_A{level?fmt=%HH}h
OBS_REGRID_DATA_PLANE_TEMPLATE = {OBS_PCP_COMBINE_OUTPUT_TEMPLATE}
OBS_GRID_STAT_INPUT_TEMPLATE = {OBS_REGRID_DATA_PLANE_TEMPLATE}
GRID_STAT_VERIFICATION_MASK_TEMPLATE = {INPUT_BASE}/model_applications/precipitation/mask/CONUS_HRRRTLE.nc, {INPUT_BASE}/model_applications/precipitation/mask/EAST_HRRRTLE.nc, {INPUT_BASE}/model_applications/precipitation/mask/WEST_HRRRTLE.nc
GRID_STAT_OUTPUT_TEMPLATE = {init?fmt=%Y%m%d%H%M}
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 = [];
censor_val = [];
cat_thresh = [];
cnt_thresh = [ NA ];
cnt_logic = UNION;
wind_thresh = [ NA ];
wind_logic = UNION;
eclv_points = 0.05;
nc_pairs_var_suffix = "";
//nc_pairs_var_name =
${METPLUS_NC_PAIRS_VAR_NAME}
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 = {
wave_1d_beg = [];
wave_1d_end = [];
}
////////////////////////////////////////////////////////////////////////////////
//
// 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 = {
baddeley_p = 2;
baddeley_max_dist = NA;
fom_alpha = 0.1;
zhu_weight = 0.5;
}
////////////////////////////////////////////////////////////////////////////////
//
// 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}
////////////////////////////////////////////////////////////////////////////////
//grid_weight_flag =
${METPLUS_GRID_WEIGHT_FLAG}
tmp_dir = "/tmp";
// output_prefix =
${METPLUS_OUTPUT_PREFIX}
////////////////////////////////////////////////////////////////////////////////
${METPLUS_MET_CONFIG_OVERRIDES}
Running METplus
This use case can be run two ways:
Passing in GridStat_fcstHRRR-TLE_obsStgIV_GRIB.conf then a user-specific system configuration file:
run_metplus.py -c /path/to/METplus/parm/use_cases/model_applications/precipitation/GridStat_fcstHRRR-TLE_obsStgIV_GRIB.conf -c /path/to/user_system.conf
Modifying the configurations in parm/metplus_config, then passing in GridStat_fcstHRRR-TLE_obsStgIV_GRIB.conf:
run_metplus.py -c /path/to/METplus/parm/use_cases/model_applications/precipitation/GridStat_fcstHRRR-TLE_obsStgIV_GRIB.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_fcstHRRR-TLE_obsStgIV_GRIB/grid_stat/201609041200 (relative to OUTPUT_BASE) and will contain the following files:
grid_stat_PROB_PHPT_APCP_vs_STAGE4_GRIB_APCP_A06_060000L_20160904_180000V_pct.txt
grid_stat_PROB_PHPT_APCP_vs_STAGE4_GRIB_APCP_A06_060000L_20160904_180000V_pjc.txt
grid_stat_PROB_PHPT_APCP_vs_STAGE4_GRIB_APCP_A06_060000L_20160904_180000V_prc.txt
grid_stat_PROB_PHPT_APCP_vs_STAGE4_GRIB_APCP_A06_060000L_20160904_180000V_pstd.txt
grid_stat_PROB_PHPT_APCP_vs_STAGE4_GRIB_APCP_A06_060000L_20160904_180000V.stat
grid_stat_PROB_PHPT_APCP_vs_STAGE4_GRIB_APCP_A06_060000L_20160904_190000V_pct.txt
grid_stat_PROB_PHPT_APCP_vs_STAGE4_GRIB_APCP_A06_060000L_20160904_190000V_pjc.txt
grid_stat_PROB_PHPT_APCP_vs_STAGE4_GRIB_APCP_A06_060000L_20160904_190000V_prc.txt
grid_stat_PROB_PHPT_APCP_vs_STAGE4_GRIB_APCP_A06_060000L_20160904_190000V_pstd.txt
grid_stat_PROB_PHPT_APCP_vs_STAGE4_GRIB_APCP_A06_070000L_20160904_190000V.stat
Keywords
Note
GridStatToolUseCase, PrecipitationAppUseCase, PCPCombineToolUseCase, RegridDataPlaneToolUseCase, GRIBFileUseCase, GRIB2FileUseCase, NetCDFFileUseCase, NOAAWPCOrgUseCase, NOAAHMTOrgUseCase, NOAAHWTOrgUseCase, ConvectionAllowingModelsAppUseCase, ProbabilityVerificationUseCase
Total running time of the script: ( 0 minutes 0.000 seconds)