Nightly build is failing

[github-actions]

The Nightly workflow is failing.
The documentation build failed.
Log:

python override_check.py
Override check successful.
Running Sphinx v4.5.0
making output directory... done
[autosummary] generating autosummary for: api/index.rst, api/references.rst, devel/CONTRIBUTING.md, devel/index.rst, devel/infrastructureguide.rst, devel/roadmap.rst, index.rst, userguide/SUPPORT.md, userguide/apichange.rst, userguide/citing.rst, userguide/gempak.rst, userguide/index.rst, userguide/installguide.rst, userguide/media.rst, userguide/startingguide.rst, userguide/upgradeguide.rst
[autosummary] generating autosummary for: /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.calc.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.constants.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.interpolate.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.io.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.plots.ctables.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.plots.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.units.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.xarray.rst
[autosummary] generating autosummary for: /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.calc.absolute_momentum.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.calc.absolute_vorticity.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.calc.add_height_to_pressure.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.calc.add_pressure_to_height.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.calc.advection.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.calc.ageostrophic_wind.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.calc.altimeter_to_sea_level_pressure.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.calc.altimeter_to_station_pressure.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.calc.angle_to_direction.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.calc.apparent_temperature.rst, ..., /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.plots.read_colortable.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.plots.wx_code_to_numeric.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.units.check_units.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.units.concatenate.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.units.is_quantity.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.units.masked_array.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.units.pandas_dataframe_to_unit_arrays.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.units.process_units.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.units.setup_registry.rst, /home/runner/work/MetPy/MetPy/docs/api/generated/metpy.xarray.grid_deltas_from_dataarray.rst
loading intersphinx inventory from https://scitools.org.uk/cartopy/docs/latest/objects.inv...
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generating gallery...
Using Sphinx-Gallery to convert rst text blocks to markdown for .ipynb files.
generating gallery for examples... [ 14%] XArray_Projections.py
generating gallery for examples... [ 28%] sigma_to_pressure_interpolation.py
generating gallery for examples... [ 42%] Advanced_Sounding.py
generating gallery for examples... [ 57%] cross_section.py
generating gallery for examples... [ 71%] Four_Panel_Map.py
generating gallery for examples... [ 85%] isentropic_example.py
generating gallery for examples... [100%] meteogram_metpy.py
generating gallery for examples/calculations... [  4%] Parse_Angles.py

generating gallery for examples/calculations... [  9%] Dewpoint_and_Mixing_Ratio.py

generating gallery for examples/calculations... [ 14%] Angle_to_Direction.py

generating gallery for examples/calculations... [ 19%] Wind_Speed.py

generating gallery for examples/calculations... [ 23%] Divergence.py

generating gallery for examples/calculations... [ 28%] Vorticity.py

generating gallery for examples/calculations... [ 33%] Absolute_Vorticity.py

generating gallery for examples/calculations... [ 38%] Total_Deformation.py

generating gallery for examples/calculations... [ 42%] Shearing_Deformation.py

generating gallery for examples/calculations... [ 47%] Stretching_Deformation.py

generating gallery for examples/calculations... [ 52%] Static_Stability.py

generating gallery for examples/calculations... [ 57%] Mean_Pressure_Weighted.py

generating gallery for examples/calculations... [ 61%] Mountain_Problem.py

generating gallery for examples/calculations... [ 66%] Bulk_Shear.py

generating gallery for examples/calculations... [ 71%] Thickness_Hydrostatic.py

generating gallery for examples/calculations... [ 76%] Equivalent_Potential_Temperature.py

generating gallery for examples/calculations... [ 80%] Advection.py

generating gallery for examples/calculations... [ 85%] Gradient.py

generating gallery for examples/calculations... [ 90%] QVector.py

generating gallery for examples/calculations... [ 95%] Smoothing.py

generating gallery for examples/calculations... [100%] Sounding_Calculations.py
generating gallery for examples/formats... [ 33%] GINI_Water_Vapor.py

generating gallery for examples/formats... [ 66%] NEXRAD_Level_3_File.py

generating gallery for examples/formats... [100%] NEXRAD_Level_2_File.py
generating gallery for examples/gridding... [ 20%] Find_Natural_Neighbors_Verification.py

generating gallery for examples/gridding... [ 40%] Wind_SLP_Interpolation.py

generating gallery for examples/gridding... [ 60%] Point_Interpolation.py

generating gallery for examples/gridding... [ 80%] Inverse_Distance_Verification.py

generating gallery for examples/gridding... [100%] Natural_Neighbor_Verification.py
generating gallery for examples/plots... [  6%] Simplified_Image_Plot.py

generating gallery for examples/plots... [ 13%] US_Counties.py

generating gallery for examples/plots... [ 20%] raster_declarative.py

generating gallery for examples/plots... [ 26%] spc_convective_outlook.py

generating gallery for examples/plots... [ 33%] Combined_plotting.py

generating gallery for examples/plots... [ 40%] surface_declarative.py

generating gallery for examples/plots... [ 46%] upperair_declarative.py

generating gallery for examples/plots... [ 53%] nhc_wind_probabilities.py

generating gallery for examples/plots... [ 60%] Skew-T_Layout.py

generating gallery for examples/plots... [ 66%] Hodograph_Inset.py

generating gallery for examples/plots... [ 73%] Sounding_LCL_Dataset.py

generating gallery for examples/plots... [ 80%] Simple_Sounding.py

generating gallery for examples/plots... [ 86%] Mesonet_Stationplot.py

generating gallery for examples/plots... [ 93%] Station_Plot.py

generating gallery for examples/plots... [100%] Station_Plot_with_Layout.py
generating gallery for tutorials... [ 25%] unit_tutorial.py

generating gallery for tutorials... [ 50%] upperair_soundings.py

generating gallery for tutorials... [ 75%] xarray_tutorial.py

generating gallery for tutorials... [100%] declarative_tutorial.py
computation time summary:

- ../tutorials/declarative_tutorial.py:                           16.46 sec   0.0 MB

- ../examples/plots/Station_Plot.py:                              15.60 sec   0.0 MB

- ../examples/isentropic_example.py:                              11.59 sec   0.0 MB

- ../examples/plots/Mesonet_Stationplot.py:                       10.25 sec   0.0 MB

- ../examples/Four_Panel_Map.py:                                   8.38 sec   0.0 MB

- ../examples/XArray_Projections.py:                               7.66 sec   0.0 MB

- ../examples/plots/nhc_wind_probabilities.py:                     7.53 sec   0.0 MB

- ../examples/gridding/Wind_SLP_Interpolation.py:                  7.22 sec   0.0 MB

- ../examples/formats/NEXRAD_Level_2_File.py:                      6.89 sec   0.0 MB

- ../examples/gridding/Point_Interpolation.py:                     6.28 sec   0.0 MB

- ../examples/plots/spc_convective_outlook.py:                     6.26 sec   0.0 MB

- ../examples/plots/Combined_plotting.py:                          4.58 sec   0.0 MB

- ../examples/cross_section.py:                                    4.14 sec   0.0 MB

- ../examples/sigma_to_pressure_interpolation.py:                  3.63 sec   0.0 MB

- ../tutorials/xarray_tutorial.py:                                 2.81 sec   0.0 MB

- ../examples/plots/Station_Plot_with_Layout.py:                   1.96 sec   0.0 MB

- ../examples/formats/NEXRAD_Level_3_File.py:                      1.93 sec   0.0 MB

- ../examples/plots/surface_declarative.py:                        1.89 sec   0.0 MB

- ../examples/plots/US_Counties.py:                                1.70 sec   0.0 MB

- ../tutorials/upperair_soundings.py:                              1.53 sec   0.0 MB

- ../examples/formats/GINI_Water_Vapor.py:                         0.94 sec   0.0 MB

- ../examples/plots/upperair_declarative.py:                       0.90 sec   0.0 MB

- ../examples/meteogram_metpy.py:                                  0.85 sec   0.0 MB

- ../examples/plots/raster_declarative.py:                         0.80 sec   0.0 MB

- ../examples/calculations/Smoothing.py:                           0.70 sec   0.0 MB

- ../examples/plots/Simplified_Image_Plot.py:                      0.61 sec   0.0 MB

- ../examples/gridding/Natural_Neighbor_Verification.py:           0.54 sec   0.0 MB

- ../examples/gridding/Inverse_Distance_Verification.py:           0.46 sec   0.0 MB

- ../examples/plots/Simple_Sounding.py:                            0.44 sec   0.0 MB

- ../examples/gridding/Find_Natural_Neighbors_Verification.py:     0.41 sec   0.0 MB

- ../examples/calculations/Sounding_Calculations.py:               0.32 sec   0.0 MB

- ../examples/plots/Hodograph_Inset.py:                            0.31 sec   0.0 MB

- ../examples/plots/Skew-T_Layout.py:                              0.29 sec   0.0 MB

- ../examples/plots/Sounding_LCL_Dataset.py:                       0.27 sec   0.0 MB

- ../examples/calculations/Absolute_Vorticity.py:                  0.26 sec   0.0 MB

- ../examples/calculations/Vorticity.py:                           0.26 sec   0.0 MB

- ../examples/calculations/Total_Deformation.py:                   0.26 sec   0.0 MB

- ../examples/calculations/Shearing_Deformation.py:                0.25 sec   0.0 MB

- ../examples/calculations/Stretching_Deformation.py:              0.25 sec   0.0 MB

- ../examples/Advanced_Sounding.py:                                0.25 sec   0.0 MB

- ../examples/calculations/QVector.py:                             0.20 sec   0.0 MB

- ../examples/calculations/Divergence.py:                          0.18 sec   0.0 MB

- ../examples/calculations/Advection.py:                           0.17 sec   0.0 MB

- ../examples/calculations/Wind_Speed.py:                          0.16 sec   0.0 MB

- ../examples/calculations/Equivalent_Potential_Temperature.py:    0.10 sec   0.0 MB

- ../examples/calculations/Gradient.py:                            0.02 sec   0.0 MB

- ../tutorials/unit_tutorial.py:                                   0.02 sec   0.0 MB

- ../examples/calculations/Thickness_Hydrostatic.py:               0.01 sec   0.0 MB

- ../examples/calculations/Bulk_Shear.py:                          0.01 sec   0.0 MB

- ../examples/calculations/Mean_Pressure_Weighted.py:              0.01 sec   0.0 MB

- ../examples/calculations/Static_Stability.py:                    0.01 sec   0.0 MB

- ../examples/calculations/Mountain_Problem.py:                    0.01 sec   0.0 MB

- ../examples/calculations/Dewpoint_and_Mixing_Ratio.py:           0.01 sec   0.0 MB

- ../examples/calculations/Angle_to_Direction.py:                  0.01 sec   0.0 MB

- ../examples/calculations/Parse_Angles.py:                        0.00 sec   0.0 MB

myst v0.18.1: MdParserConfig(commonmark_only=False, gfm_only=False, enable_extensions=[], disable_syntax=[], all_links_external=False, url_schemes=('http', 'https', 'mailto', 'ftp'), ref_domains=None, highlight_code_blocks=True, number_code_blocks=[], title_to_header=False, heading_anchors=2, heading_slug_func=None, footnote_transition=True, words_per_minute=200, sub_delimiters=('{', '}'), linkify_fuzzy_links=True, dmath_allow_labels=True, dmath_allow_space=True, dmath_allow_digits=True, dmath_double_inline=False, update_mathjax=True, mathjax_classes='tex2jax_process|mathjax_process|math|output_area')

building [mo]: targets for 0 po files that are out of date

building [html]: targets for 16 source files that are out of date

updating environment: [new config] 288 added, 0 changed, 0 removed

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Linkchecker output:

Checking all links
api/references.rst:136: https://apps.dtic.mil/sti/citations/AD0744042 -> broken HTTPSConnectionPool(host='apps.dtic.mil', port=443): Max retries exceeded with url: /sti/citations/AD0744042 (Caused by NewConnectionError(': Failed to establish a new connection: [Errno -3] Temporary failure in name resolution'))

[dcamron]

Link seems a bit slow but fine (at least to manually resolve) now. This particular link has come up in multiple nightly failures now, we should again consider saving the pdf or otherwise handling this link. Will leave this open for that discussion.

[dopplershift]

It's a 12M PDF, but once we add it to the _static portion of the docs, it should never change again.

[dopplershift]

I guess I should clarify that, given the instability it's causing in the nightly builds, I'm inclined to go ahead and check it in.