metloom

Location Oriented Observed Meteorology

metloom is a python library created with the goal of consistent, simple sampling of meteorology and snow related point measurments from a variety of datasources is developed by M3 Works as a tool for validating computational hydrology model results. Contributions welcome!

Warning - This software is provided as is (see the license), so use at your own risk. This is an opensource package with the goal of making data wrangling easier. We make no guarantees about the quality or accuracy of the data and any interpretation of the meaning of the data is up to you.

• Free software: BSD license

Features

• Sampling of daily, hourly, and snow course data
• Searching for stations from a datasource within a shapefile

• Current data sources:

  • CDEC
  • SNOTEL
  • MESOWEST
  • USGS
  • NWS FORECAST
  • GEOSPHERE AUSTRIA
  • UCSB CUES
  • MET NORWAY
  • SNOWEX MET STATIONS
  • CENTER FOR SNOW AND AVALANCHE STUDIES (CSAS)

Requirements

python >= 3.7

Install

python3 -m pip install metloom

• Common install issues:

  • Macbook M1 and M2 chips: some python packages run into issues with the new M chips

    • error : from lxml import etree in utils.py ((mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64)

      The solution is the following

      pip uninstall lxml
      pip install --no-binary lxml lxml

Local install for dev

The recommendation is to use virtualenv, but other local python environment isolation tools will work (pipenv, conda)

python3 -m pip install --upgrade pip
python3 -m pip install -r requirements_dev
python3 -m pip install .

Testing

pytest

If contributing to the codebase, code coverage should not decrease from the contributions. Make sure to check code coverage before opening a pull request.

pytest --cov=metloom

Documentation

readthedocs coming soon

https://metloom.readthedocs.io.

Usage

See usage documentation https://metloom.readthedocs.io/en/latest/usage.html

NOTES: PointData methods that get point data return a GeoDataFrame indexed on both datetime and station code. To reset the index simply run df.reset_index(inplace=True)

Simple usage examples are provided in this readme and in the docs. See our examples for code walkthroughs and more complicated use cases.

Usage Examples

Use metloom to find data for a station

from datetime import datetime
from metloom.pointdata import SnotelPointData

snotel_point = SnotelPointData("713:CO:SNTL", "MyStation")
df = snotel_point.get_daily_data(
    datetime(2020, 1, 2), datetime(2020, 1, 20),
    [snotel_point.ALLOWED_VARIABLES.SWE]
)
print(df)

Use metloom to find snow courses within a geometry

from metloom.pointdata import CDECPointData
from metloom.variables import CdecStationVariables

import geopandas as gpd

fp = <path to shape file>
obj = gpd.read_file(fp)

vrs = [
    CdecStationVariables.SWE,
    CdecStationVariables.SNOWDEPTH
]
points = CDECPointData.points_from_geometry(obj, vrs, snow_courses=True)
df = points.to_dataframe()
print(df)

Tutorials

In the Examples folder, there are multiple Jupyter notbook based tutorials. You can edit and run these notebooks by running Jupyter Lab from the command line

pip install jupyterlab
jupyter lab

This will open a Jupyter Lab session in your default browser.

Credits

This package was created with Cookiecutter and the audreyr/cookiecutter-pypackage project template.