Note
Click here to download the full example code
5.2.8.2. 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.
Datasets
Relevant information about the datasets that would be beneficial include:
Forecast dataset: GFS
Observation dataset: Climatologically Calibrated Precipitation Analysis (CCPA)
Sources of data (links, contacts, etc…)
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
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 with the -c option, i.e. -c parm/use_cases/model_applications/precipitation/GridStat_fcstGFS_obsCCPA_GRIB.conf
# Grid to Grid Precipitation Example
[config]
# time looping - options are INIT, VALID, RETRO, and REALTIME
LOOP_BY = VALID
# Format of VALID_BEG and VALID_END
VALID_TIME_FMT = %Y%m%d%H
# Start time for METplus run
VALID_BEG = 2017061300
# End time for METplus run
VALID_END = 2017061300
# Increment between METplus runs in seconds. Must be >= 60
VALID_INCREMENT = 86400
# 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
# List of applications to run
PROCESS_LIST = PCPCombine, GridStat
# run pcp_combine on forecast data
FCST_PCP_COMBINE_RUN = True
# mode of pcp_combine to use (SUM, ADD, SUBTRACT)
FCST_PCP_COMBINE_METHOD = SUM
# list of variables to compare
BOTH_VAR1_NAME = APCP
BOTH_VAR1_LEVELS = A24
BOTH_VAR1_THRESH = ge12.7, ge25.4, ge50.8, ge76.2, ge152.4
# list of forecast leads to process
LEAD_SEQ = 24
# description of data to be processed
# used in output file path
MODEL = GFS
OBTYPE = ANLYS
# location of grid_stat MET config file
GRID_STAT_CONFIG_FILE = {PARM_BASE}/met_config/GridStatConfig_wrapped
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_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_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
# Forecast data description variables
FCST_PCP_COMBINE_INPUT_DATATYPE = GRIB
FCST_IS_PROB = false
FCST_PCP_COMBINE_INPUT_ACCUMS = 6
# Observation data description variables
# none needed
[dir]
# input and output data directories
FCST_PCP_COMBINE_INPUT_DIR = {INPUT_BASE}/model_applications/precipitation/fcst
FCST_PCP_COMBINE_OUTPUT_DIR = {OUTPUT_BASE}/model_applications/precipitation/GridStat_fcstGFS_obsCCPA_GRIB/gfs/bucket
FCST_GRID_STAT_INPUT_DIR = {FCST_PCP_COMBINE_OUTPUT_DIR}
OBS_GRID_STAT_INPUT_DIR = {INPUT_BASE}/model_applications/precipitation/daily_1deg_ccpa
GRID_STAT_OUTPUT_DIR = {OUTPUT_BASE}/model_applications/precipitation/GridStat_fcstGFS_obsCCPA_GRIB/met_out/{MODEL}/precip
[filename_templates]
# format of filenames
# GFS
FCST_PCP_COMBINE_INPUT_TEMPLATE = pgbf{lead?fmt=%HHH}.gfs.{init?fmt=%Y%m%d%H}
FCST_PCP_COMBINE_OUTPUT_TEMPLATE = gfs.{init?fmt=%Y%m%d%H}_A{level?fmt=%HH}h
FCST_GRID_STAT_INPUT_TEMPLATE = gfs.{init?fmt=%Y%m%d%H}_A{level?fmt=%HH}h
# ANLYS
OBS_GRID_STAT_INPUT_TEMPLATE = ccpa_conus_1.0d_{valid?fmt=%Y%m%d}
GRID_STAT_OUTPUT_TEMPLATE = {valid?fmt=%Y%m%d%H%M}/grid_stat
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_fcstGFS_obsCCPA_GRIB.conf then a user-specific system configuration file:
run_metplus.py -c /path/to/METplus/parm/use_cases/model_applications/precipitation/GridStat_fcstGFS_obsCCPA_GRIB.conf -c /path/to/user_system.conf
Modifying the configurations in parm/metplus_config, then passing in GridStat_fcstGFS_obsCCPA_GRIB:
run_metplus.py -c /path/to/METplus/parm/use_cases/model_applications/precipitation/GridStat_fcstGFS_obsCCPA_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_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
sphinx_gallery_thumbnail_path = ‘_static/precipitation-GridStat_fcstGFS_obsCCPA_GRIB.png’
Note
GridStatToolUseCase, PrecipitationAppUseCase, PCPCombineToolUseCase, GRIBFileUseCase, NOAAEMCOrgUseCase, MediumRangeAppUseCase, MaskingFeatureUseCase, RegriddingInToolUseCase
Total running time of the script: ( 0 minutes 0.000 seconds)