Note
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Grid-Stat: 24-hour QPF Use Case
model_applications/precipitation/GridStat_fcstGFS_obsCCPA_Grib.conf
Scientific Objective
To evaluate 24 hour precipitation over the United States using the NCEP Climatology Calibrated Precipitation Analysis (CCPA) generated by a global weather model.
Version Added
METplus version 6.0
Datasets
Forecast: NOAA Global Forecast System (GFS)
Observation: Climatologically Calibrated Precipitation Analysis (CCPA)
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 first runs PCPCombine on the observation data to build a 24 hour precipitation accumulation file. Then the observation data are compared to the forecast data using GridStat.
METplus Workflow
Beginning time (VALID_BEG): 2017061300
End time (VALID_END): 2017061300
Increment between beginning and end times (VALID_INCREMENT): 86400
Sequence of forecast leads to process (LEAD_SEQ): 24
The following tools are used for each run time:
PCPCombine (observation) > GridStat
This example loops by valid time. 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, i.e. parm/use_cases/model_applications/precipitation/GridStat_fcstGFS_obsCCPA_GRIB.conf
[config]
# Documentation for this use case can be found at
# https://metplus.readthedocs.io/en/latest/generated/model_applications/precipitation/GridStat_fcstGFS_obsCCPA_GRIB.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, 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 = 2017061300
VALID_INCREMENT = 86400
LEAD_SEQ = 24
###
# 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/fcst
FCST_PCP_COMBINE_INPUT_TEMPLATE = pgbf{lead?fmt=%HHH}.gfs.{init?fmt=%Y%m%d%H}
FCST_PCP_COMBINE_OUTPUT_DIR = {OUTPUT_BASE}/model_applications/precipitation/GridStat_fcstGFS_obsCCPA_GRIB/gfs/bucket
FCST_PCP_COMBINE_OUTPUT_TEMPLATE = gfs.{init?fmt=%Y%m%d%H}_A{level?fmt=%HH}h
FCST_GRID_STAT_INPUT_DIR = {FCST_PCP_COMBINE_OUTPUT_DIR}
FCST_GRID_STAT_INPUT_TEMPLATE = gfs.{init?fmt=%Y%m%d%H}_A{level?fmt=%HH}h
OBS_GRID_STAT_INPUT_DIR = {INPUT_BASE}/model_applications/precipitation/daily_1deg_ccpa
OBS_GRID_STAT_INPUT_TEMPLATE = ccpa_conus_1.0d_{valid?fmt=%Y%m%d}
GRID_STAT_MASK_POLY = {INPUT_BASE}/model_applications/precipitation/poly/CONUS.nc, {INPUT_BASE}/model_applications/precipitation/poly/EAST.nc, {INPUT_BASE}/model_applications/precipitation/poly/WEST.nc
GRID_STAT_OUTPUT_DIR = {OUTPUT_BASE}/model_applications/precipitation/GridStat_fcstGFS_obsCCPA_GRIB/met_out/{MODEL}/precip
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
###
MODEL = GFS
OBTYPE = ANLYS
BOTH_VAR1_NAME = APCP
BOTH_VAR1_LEVELS = A24
BOTH_VAR1_THRESH = ge12.7, ge25.4, ge50.8, ge76.2, ge152.4
###
# PCPCombine Settings
# https://metplus.readthedocs.io/en/latest/Users_Guide/wrappers.html#pcpcombine
###
FCST_PCP_COMBINE_METHOD = SUM
FCST_PCP_COMBINE_INPUT_DATATYPE = GRIB
FCST_PCP_COMBINE_INPUT_ACCUMS = 6
###
# GridStat Settings
# https://metplus.readthedocs.io/en/latest/Users_Guide/wrappers.html#gridstat
###
GRID_STAT_REGRID_TO_GRID = G211
GRID_STAT_REGRID_METHOD = BILIN
GRID_STAT_REGRID_WIDTH = 2
GRID_STAT_OUTPUT_PREFIX = {MODEL}_{CURRENT_FCST_NAME}_vs_{OBTYPE}_{CURRENT_OBS_NAME}_{CURRENT_FCST_LEVEL}
GRID_STAT_CLIMO_CDF_WRITE_BINS = False
GRID_STAT_OUTPUT_FLAG_CTC = 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_CLIMO_MEAN_REGRID_METHOD = BILIN
GRID_STAT_CLIMO_MEAN_REGRID_WIDTH = 2
GRID_STAT_CLIMO_MEAN_TIME_INTERP_METHOD = NEAREST
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/precipitation/GridStat_fcstGFS_obsCCPA_GRIB.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 model_applications/precipitation/GridStat_fcstGFS_obsCCPA_GRIB/uswrp/met_out/{MODEL}/precip (relative to OUTPUT_BASE) and will contain the following files:
grid_stat_GFS_APCP_vs_ANLYS_APCP_A24_240000L_20170613_000000V.stat
Keywords
Note
GridStatToolUseCase
PrecipitationAppUseCase
PCPCombineToolUseCase
GRIBFileUseCase
NOAAEMCOrgUseCase
MediumRangeAppUseCase
MaskingFeatureUseCase
RegriddingInToolUseCase
ClimatologyUseCase
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