diff --git a/tools/waccmToMusicBox.py b/tools/waccmToMusicBox.py
new file mode 100644
index 00000000..8fadcd23
--- /dev/null
+++ b/tools/waccmToMusicBox.py
@@ -0,0 +1,377 @@
+#!/usr/bin/env python3
+# waccmToMusicBox.py
+# MusicBox: Extract variables from WACCM model output,
+# and convert to initial conditions for MusicBox (case TS1).
+#
+# Author: Carl Drews
+# Copyright 2024 by Atomospheric Chemistry Observations & Modeling (UCAR/ACOM)
+
+#import os
+import argparse
+import datetime
+import xarray
+import json
+import sys
+import os
+import shutil
+
+import logging
+logger = logging.getLogger(__name__)
+
+
+
+# configure argparse for key-value pairs
+class KeyValueAction(argparse.Action):
+    def __call__(self, parser, namespace, values, option_string=None):
+        for value in values:
+            key, val = value.split('=')
+            setattr(namespace, key, val)
+
+# Retrieve named arguments from the command line and
+# return in a dictionary of keywords.
+# argPairs = list of arguments, probably from sys.argv[1:]
+#       named arguments are formatted like this=3.14159
+# return dictionary of keywords and values
+def getArgsDictionary(argPairs):
+    parser = argparse.ArgumentParser(
+        description='Process some key=value pairs.')
+    parser.add_argument(
+        'key_value_pairs',
+        nargs='+',  # This means one or more arguments are expected
+        action=KeyValueAction,
+        help="Arguments in key=value format. Example: configFile=my_config.json"
+    )
+
+    argDict = vars(parser.parse_args(argPairs))      # return dictionary
+
+    return (argDict)
+
+
+
+# Convert safely from string to integer (alphas convert to 0).
+def safeInt(intString):
+        intValue = 0
+        try:
+                intValue = int(intString)
+        except ValueError as error:
+                intValue = 0
+
+        return intValue
+
+
+
+# Convert string to number, or 0.0 if not numeric.
+# numString = string that probably can be converted
+def safeFloat(numString):
+	result = -1.0
+	try:
+		result = float(numString)
+	except ValueError:
+		result = 0.0
+
+	return result
+
+
+
+# Build and return dictionary of WACCM variable names
+# and their MusicBox equivalents.
+def getMusicaDictionary():
+   varMap = {
+      "T": "temperature",
+      "PS": "pressure",
+      "N2O": "N2O",
+      "H2O2": "H2O2",
+      "O3": "O3",
+      "NH3": "NH3",
+      "CH4": "CH4"
+   }
+
+   return(dict(sorted(varMap.items())))
+
+
+
+# Read array values at a single lat-lon-time point.
+# waccmMusicaDict = mapping from WACCM names to MusicBox
+# latitude, longitude = geo-coordinates of retrieval point
+# when = date and time to extract
+# modelDir = directory containing model output
+# return dictionary of MUSICA variable names, values, and units
+def readWACCM(waccmMusicaDict, latitude, longitude,
+  when, modelDir):
+
+  # create the filename
+  waccmFilename = ("f.e22.beta02.FWSD.f09_f09_mg17.cesm2_2_beta02.forecast.001.cam.h3.{:4d}-{:02d}-{:02}-00000.nc"
+    .format(when.year, when.month, when.day))
+  logger.info("WACCM file = {}".format(waccmFilename))
+
+  # open dataset for reading
+  waccmDataSet = xarray.open_dataset("{}/{}".format(modelDir, waccmFilename))
+  if (True):
+    # diagnostic to look at dataset structure
+    logger.info("WACCM dataset = {}".format(waccmDataSet))
+
+  # retrieve all vars at a single point
+  whenStr = when.strftime("%Y-%m-%d %H:%M:%S")
+  logger.info("whenStr = {}".format(whenStr))
+  singlePoint = waccmDataSet.sel(lon=longitude, lat=latitude, lev=1000.0,
+    time=whenStr, method="nearest")
+  if (True):
+    # diagnostic to look at single point structure
+    logger.info("WACCM singlePoint = {}".format(singlePoint))
+
+  # loop through vars and build another dictionary
+  musicaDict = {}
+  for waccmKey, musicaName in waccmMusicaDict.items():
+    logger.info("WACCM Chemical = {}".format(waccmKey))
+    if not waccmKey in singlePoint:
+      logger.warning("Requested variable {} not found in WACCM model output."
+        .format(waccmKey))
+      musicaTuple = (waccmKey, None, None)
+      musicaDict[musicaName] = musicaTuple
+      continue
+
+    chemSinglePoint = singlePoint[waccmKey]
+    if (True):
+      logger.info("{} = object {}".format(waccmKey, chemSinglePoint))
+      logger.info("{} = value {} {}".format(waccmKey, chemSinglePoint.values, chemSinglePoint.units))
+    musicaTuple = (waccmKey, float(chemSinglePoint.values.mean()), chemSinglePoint.units)   # from 0-dim array
+    musicaDict[musicaName] = musicaTuple
+
+  # close the NetCDF file
+  waccmDataSet.close()
+
+  return(musicaDict)
+
+
+
+# set up indexes for the tuple
+musicaIndex = 0
+valueIndex = 1
+unitIndex = 2
+
+# Perform any numeric conversion needed.
+# varDict = originally read from WACCM, tuples are (musicaName, value, units)
+# return varDict with values modified
+def convertWaccm(varDict):
+
+  moleToM3 = 1000 / 22.4
+
+  for key, vTuple in varDict.items():
+    # convert moles / mole to moles / cubic meter
+    units = vTuple[unitIndex]
+    if (units == "mol/mol"):
+      varDict[key] = (vTuple[0], vTuple[valueIndex] * moleToM3, "mol m-3")
+
+  return(varDict)
+
+
+
+# Write CSV file suitable for initial_conditions.csv in MusicBox.
+# initValues = dictionary of Musica varnames and (WACCM name, value, units)
+def writeInitCSV(initValues, filename):
+  fp = open(filename, "w")
+
+  # write the column titles
+  firstColumn = True
+  for key, value in initValues.items():
+    if (firstColumn):
+      firstColumn = False
+    else:
+      fp.write(",")
+
+    fp.write(key)
+  fp.write("\n")
+
+  # write the variable values
+  firstColumn = True
+  for key, value in initValues.items():
+    if (firstColumn):
+      firstColumn = False
+    else:
+      fp.write(",")
+
+    fp.write("{}".format(value[valueIndex]))
+  fp.write("\n")
+
+  fp.close()
+  return
+
+
+
+# Write JSON fragment suitable for my_config.json in MusicBox.
+# initValues = dictionary of Musica varnames and (WACCM name, value, units)
+def writeInitJSON(initValues, filename):
+
+  # set up dictionary of vars and initial values
+  dictName = "chemical species"
+  initConfig = {dictName: {} }
+
+  for key, value in initValues.items():
+    initConfig[dictName][key] = {
+      "initial value [{}]".format(value[unitIndex]): value[valueIndex]}
+
+  # write JSON content to the file
+  fpJson = open(filename, "w")
+
+  json.dump(initConfig, fpJson, indent=2)
+  fpJson.close()
+
+  fpJson.close()
+  return
+
+
+
+# Reproduce the MusicBox configuration with new initial values.
+# initValues = dictionary of Musica varnames and (WACCM name, value, units)
+# templateDir = directory containing configuration files and camp_data
+# destDir = the template will be created in this directory
+def insertIntoTemplate(initValues, templateDir, destDir):
+
+  # copy the template directory to working area
+  destZip = os.path.basename(os.path.normpath(templateDir))
+  destPath = os.path.join(destDir, destZip)
+  logger.info("Create new configuration in = {}".format(destPath))
+
+  # remove directory if it already exists
+  if os.path.exists(destPath):
+    shutil.rmtree(destPath)
+
+  # copy the template directory
+  shutil.copytree(templateDir, destPath)
+
+  # find the standard configuration file and parse it
+  myConfigFile = os.path.join(destPath, "my_config.json")
+  with open(myConfigFile) as jsonFile:
+    myConfig = json.load(jsonFile)
+
+  # locate the section for chemical concentrations
+  chemSpeciesTag = "chemical species"
+  chemSpecies = myConfig[chemSpeciesTag]
+  logger.info("Replace chemSpecies = {}".format(chemSpecies))
+  del myConfig[chemSpeciesTag]     # delete the existing section
+
+  # set up dictionary of chemicals and initial values
+  chemValueDict = {}
+  temperature = 0.0
+  pressure = 0.0
+  for key, value in initValues.items():
+    if (key == "temperature"):
+      temperature = safeFloat(value[valueIndex])
+      continue
+    if (key == "pressure"):
+      pressure = safeFloat(value[valueIndex])
+      continue
+
+    chemValueDict[key] = {
+      "initial value [{}]".format(value[unitIndex]): value[valueIndex]}
+
+  myConfig[chemSpeciesTag] = chemValueDict
+
+  # replace the values of temperature and pressure
+  envConditionsTag = "environmental conditions"
+  envConfig = myConfig[envConditionsTag]
+  envConfig["temperature"]["initial value [K]"] = temperature
+  envConfig["pressure"]["initial value [Pa]"] = pressure
+
+  # save over the former json file
+  with open(myConfigFile, "w") as myConfigFp:
+    json.dump(myConfig, myConfigFp, indent=2)
+
+  # compress the written directory as a zip file
+  shutil.make_archive(destPath, "zip",
+    root_dir=destDir, base_dir=destZip)
+
+  # move into the created directory
+  shutil.move(destPath + ".zip", destPath)
+
+  return
+
+
+
+# Main routine begins here.
+def main():
+    logging.basicConfig(stream=sys.stdout, level=logging.INFO)
+    logger.info("{}".format(__file__))
+    logger.info("Start time: {}".format(datetime.datetime.now()))
+
+    # retrieve and parse the command-line arguments
+    myArgs = getArgsDictionary(sys.argv[1:])
+    logger.info("Command line = {}".format(myArgs))
+
+    # set up the directories
+    waccmDir = None
+    if ("waccmDir" in myArgs):
+        waccmDir = myArgs.get("waccmDir")
+
+    musicaDir = None
+    if ("musicaDir" in myArgs):
+        musicaDir = myArgs.get("musicaDir")
+
+    # get the date-time to retrieve
+    dateStr = None
+    if ("date" in myArgs):
+      dateStr = myArgs.get("date")
+
+    timeStr = "00:00"
+    if ("time" in myArgs):
+      timeStr = myArgs.get("time")
+
+    # get the geographical location to retrieve
+    lat = None
+    if ("latitude" in myArgs):
+        lat = safeFloat(myArgs.get("latitude"))
+
+    lon = None
+    if ("longitude" in myArgs):
+        lon = safeFloat(myArgs.get("longitude"))
+
+    retrieveWhen = datetime.datetime.strptime(
+      "{} {}".format(dateStr, timeStr), "%Y%m%d %H:%M")
+
+    template = None
+    if ("template" in myArgs):
+        template = myArgs.get("template")
+
+    logger.info("Retrieve WACCM conditions at ({} North, {} East)   when {}."
+        .format(lat, lon, retrieveWhen))
+
+    # Read named variables from WACCM model output.
+    varValues = readWACCM(getMusicaDictionary(),
+      lat, lon, retrieveWhen, waccmDir)
+    logger.info("Original WACCM varValues = {}".format(varValues))
+
+    # Perform any conversions needed, or derive variables.
+    varValues = convertWaccm(varValues)
+    logger.info("Converted WACCM varValues = {}".format(varValues))
+
+    if (True):
+      # Write CSV file for MusicBox initial conditions.
+      csvName = "{}/{}".format(musicaDir, "initial_conditions.csv")
+      writeInitCSV(varValues, csvName)
+
+    if (True):
+      # Write JSON file for MusicBox initial conditions.
+      jsonName = "{}/{}".format(musicaDir, "initial_config.json")
+      writeInitJSON(varValues, jsonName)
+
+    if (True and template is not None):
+      logger.info("Insert values into template {}".format(template))
+      insertIntoTemplate(varValues, template, musicaDir)
+
+    logger.info("End time: {}".format(datetime.datetime.now()))
+    sys.exit(0)     # no error
+
+
+
+if (__name__ == "__main__"):
+    main()
+
+
+    logger.info("End time: {}".format(datetime.datetime.now()))
+    sys.exit(0)     # no error
+
+
+
+if (__name__ == "__main__"):
+    main()
+