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Ageostrophic_Wind_Example.ipynb reports error
Even when I find a valid timestamp (invalid timestamp yields 404) I get an error in the second cell. For example: Server Error (500: java.lang.IllegalStateException: No records found in dataset gfsanl_4_20200508_0000_000.grb2)
(python-training) jovyan@jupyter-julienchastang:~$ conda list
# packages in environment at /opt/conda/envs/python-training:
#
# Name Version Build Channel
_libgcc_mutex 0.1 conda_forge conda-forge
_openmp_mutex 4.5 1_gnu conda-forge
appdirs 1.4.3 py_1 conda-forge
argon2-cffi 20.1.0 py37h8f50634_1 conda-forge
async_generator 1.10 py_0 conda-forge
attrs 20.2.0 pyh9f0ad1d_0 conda-forge
backcall 0.2.0 pyh9f0ad1d_0 conda-forge
backports 1.0 py_2 conda-forge
backports.functools_lru_cache 1.6.1 py_0 conda-forge
beautifulsoup4 4.9.2 py_0 conda-forge
bleach 3.2.1 pyh9f0ad1d_0 conda-forge
boost-cpp 1.74.0 h9359b55_0 conda-forge
boto3 1.15.6 pyh9f0ad1d_0 conda-forge
botocore 1.18.6 pyh9f0ad1d_0 conda-forge
brotlipy 0.7.0 py37h8f50634_1000 conda-forge
bzip2 1.0.8 h516909a_3 conda-forge
c-ares 1.16.1 h516909a_3 conda-forge
ca-certificates 2020.6.20 hecda079_0 conda-forge
cairo 1.16.0 h3fc0475_1005 conda-forge
cartopy 0.18.0 py37h0f91b66_2 conda-forge
certifi 2020.6.20 py37hc8dfbb8_0 conda-forge
cffi 1.14.3 py37h2b28604_0 conda-forge
cfitsio 3.470 hce51eda_6 conda-forge
cftime 1.2.1 py37h03ebfcd_0 conda-forge
chardet 3.0.4 py37hc8dfbb8_1007 conda-forge
cryptography 3.1.1 py37hb09aad4_0 conda-forge
curl 7.71.1 he644dc0_6 conda-forge
cycler 0.10.0 py_2 conda-forge
dbus 1.13.6 he372182_0 conda-forge
decorator 4.4.2 py_0 conda-forge
defusedxml 0.6.0 py_0 conda-forge
entrypoints 0.3 py37hc8dfbb8_1001 conda-forge
expat 2.2.9 he1b5a44_2 conda-forge
ffmpeg 4.3.1 h167e202_0 conda-forge
fontconfig 2.13.1 h1056068_1002 conda-forge
freetype 2.10.2 he06d7ca_0 conda-forge
freexl 1.0.5 h516909a_1002 conda-forge
gdal 3.1.2 py37h518339e_1 conda-forge
geos 3.8.1 he1b5a44_0 conda-forge
geotiff 1.6.0 ha04d9d0_1 conda-forge
gettext 0.19.8.1 hc5be6a0_1002 conda-forge
giflib 5.2.1 h516909a_2 conda-forge
glib 2.66.0 h0dae87d_0 conda-forge
gmp 6.2.0 he1b5a44_2 conda-forge
gnutls 3.6.13 h79a8f9a_0 conda-forge
gst-plugins-base 1.14.5 h0935bb2_2 conda-forge
gstreamer 1.14.5 h36ae1b5_2 conda-forge
hdf4 4.2.13 hf30be14_1003 conda-forge
hdf5 1.10.6 nompi_h3c11f04_101 conda-forge
icu 67.1 he1b5a44_0 conda-forge
idna 2.10 pyh9f0ad1d_0 conda-forge
importlib-metadata 2.0.0 py37hc8dfbb8_0 conda-forge
importlib_metadata 2.0.0 0 conda-forge
importlib_resources 3.0.0 py37hc8dfbb8_0 conda-forge
ipykernel 5.3.4 py37h43977f1_0 conda-forge
ipython 7.18.1 py37hc6149b9_0 conda-forge
ipython_genutils 0.2.0 py_1 conda-forge
ipywidgets 7.5.1 pyh9f0ad1d_1 conda-forge
jedi 0.17.2 py37hc8dfbb8_0 conda-forge
jinja2 2.11.2 pyh9f0ad1d_0 conda-forge
jmespath 0.10.0 pyh9f0ad1d_0 conda-forge
jpeg 9d h516909a_0 conda-forge
json-c 0.13.1 hbfbb72e_1002 conda-forge
json5 0.9.5 pyh9f0ad1d_0 conda-forge
jsonschema 3.2.0 py37hc8dfbb8_1 conda-forge
jupyter 1.0.0 py_2 conda-forge
jupyter_client 6.1.7 py_0 conda-forge
jupyter_console 6.2.0 py_0 conda-forge
jupyter_core 4.6.3 py37hc8dfbb8_1 conda-forge
jupyterlab 2.2.8 py_0 conda-forge
jupyterlab_pygments 0.1.1 pyh9f0ad1d_0 conda-forge
jupyterlab_server 1.2.0 py_0 conda-forge
kealib 1.4.13 h33137a7_1 conda-forge
kiwisolver 1.2.0 py37h99015e2_0 conda-forge
krb5 1.17.1 hfafb76e_3 conda-forge
lame 3.100 h14c3975_1001 conda-forge
lcms2 2.11 hbd6801e_0 conda-forge
ld_impl_linux-64 2.35 h769bd43_9 conda-forge
libblas 3.8.0 17_openblas conda-forge
libcblas 3.8.0 17_openblas conda-forge
libclang 10.0.1 default_hde54327_1 conda-forge
libcurl 7.71.1 hcdd3856_6 conda-forge
libdap4 3.20.6 h1d1bd15_1 conda-forge
libedit 3.1.20191231 he28a2e2_2 conda-forge
libev 4.33 h516909a_1 conda-forge
libevent 2.1.10 hcdb4288_2 conda-forge
libffi 3.2.1 he1b5a44_1007 conda-forge
libgcc-ng 9.3.0 h24d8f2e_16 conda-forge
libgdal 3.1.2 hb2a6f5f_1 conda-forge
libgfortran-ng 7.5.0 hdf63c60_16 conda-forge
libgomp 9.3.0 h24d8f2e_16 conda-forge
libiconv 1.16 h516909a_0 conda-forge
libkml 1.3.0 h74f7ee3_1012 conda-forge
liblapack 3.8.0 17_openblas conda-forge
libllvm10 10.0.1 he513fc3_3 conda-forge
libnetcdf 4.7.4 nompi_h84807e1_105 conda-forge
libnghttp2 1.41.0 h8cfc5f6_2 conda-forge
libopenblas 0.3.10 pthreads_hb3c22a3_4 conda-forge
libpng 1.6.37 hed695b0_2 conda-forge
libpq 12.3 h5513abc_0 conda-forge
libprotobuf 3.13.0 h8b12597_0 conda-forge
libsodium 1.0.18 h516909a_1 conda-forge
libspatialite 4.3.0a h57f1b35_1039 conda-forge
libssh2 1.9.0 hab1572f_5 conda-forge
libstdcxx-ng 9.3.0 hdf63c60_16 conda-forge
libtiff 4.1.0 hc7e4089_6 conda-forge
libuuid 2.32.1 h14c3975_1000 conda-forge
libwebp-base 1.1.0 h516909a_3 conda-forge
libxcb 1.13 h14c3975_1002 conda-forge
libxkbcommon 0.10.0 he1b5a44_0 conda-forge
libxml2 2.9.10 h68273f3_2 conda-forge
lz4-c 1.9.2 he1b5a44_3 conda-forge
markupsafe 1.1.1 py37h8f50634_1 conda-forge
matplotlib 3.3.2 0 conda-forge
matplotlib-base 3.3.2 py37hd478181_0 conda-forge
metpy 0.12.2 py_0 conda-forge
mistune 0.8.4 py37h8f50634_1001 conda-forge
mysql-common 8.0.21 2 conda-forge
mysql-libs 8.0.21 hf3661c5_2 conda-forge
nbclient 0.5.0 py_0 conda-forge
nbconvert 6.0.6 py37hc8dfbb8_0 conda-forge
nbformat 5.0.7 py_0 conda-forge
ncurses 6.2 he1b5a44_1 conda-forge
nest-asyncio 1.4.0 py_1 conda-forge
netcdf4 1.5.4 nompi_py37hcbfd489_102 conda-forge
nettle 3.4.1 h1bed415_1002 conda-forge
notebook 6.1.4 py37hc8dfbb8_0 conda-forge
nspr 4.29 he1b5a44_0 conda-forge
nss 3.57 he751ad9_0 conda-forge
numpy 1.19.1 py37h7ea13bd_2 conda-forge
olefile 0.46 py_0 conda-forge
openh264 2.1.1 h8b12597_0 conda-forge
openjpeg 2.3.1 h981e76c_3 conda-forge
openssl 1.1.1h h516909a_0 conda-forge
owslib 0.20.0 py_0 conda-forge
packaging 20.4 pyh9f0ad1d_0 conda-forge
pandas 1.0.5 py37h0da4684_0 conda-forge
pandoc 2.10.1 h516909a_0 conda-forge
pandocfilters 1.4.2 py_1 conda-forge
parso 0.7.1 pyh9f0ad1d_0 conda-forge
pcre 8.44 he1b5a44_0 conda-forge
pexpect 4.8.0 py37hc8dfbb8_1 conda-forge
pickleshare 0.7.5 py37hc8dfbb8_1001 conda-forge
pillow 7.2.0 py37h718be6c_1 conda-forge
pint 0.16.1 py_0 conda-forge
pip 20.2.3 py_0 conda-forge
pixman 0.38.0 h516909a_1003 conda-forge
pooch 1.2.0 py_0 conda-forge
poppler 0.89.0 h4190859_1 conda-forge
poppler-data 0.4.9 1 conda-forge
postgresql 12.3 h8573dbc_0 conda-forge
proj 7.1.0 h966b41f_1 conda-forge
prometheus_client 0.8.0 pyh9f0ad1d_0 conda-forge
prompt-toolkit 3.0.7 py_0 conda-forge
prompt_toolkit 3.0.7 0 conda-forge
protobuf 3.13.0 py37h3340039_0 conda-forge
pthread-stubs 0.4 h14c3975_1001 conda-forge
ptyprocess 0.6.0 py_1001 conda-forge
pycparser 2.20 pyh9f0ad1d_2 conda-forge
pyepsg 0.4.0 py_0 conda-forge
pygments 2.7.1 py_0 conda-forge
pyopenssl 19.1.0 py_1 conda-forge
pyparsing 2.4.7 pyh9f0ad1d_0 conda-forge
pyproj 2.6.1.post1 py37hb5dadc3_1 conda-forge
pyqt 5.12.3 py37h8685d9f_3 conda-forge
pyqt5-sip 4.19.18 pypi_0 pypi
pyqtchart 5.12 pypi_0 pypi
pyqtwebengine 5.12.1 pypi_0 pypi
pyrsistent 0.17.3 py37h8f50634_0 conda-forge
pyshp 2.1.2 pyh9f0ad1d_0 conda-forge
pysocks 1.7.1 py37hc8dfbb8_1 conda-forge
python 3.7.8 h6f2ec95_1_cpython conda-forge
python-awips 18.1.7 pyh9f0ad1d_1 conda-forge
python-dateutil 2.8.1 py_0 conda-forge
python_abi 3.7 1_cp37m conda-forge
pytz 2020.1 pyh9f0ad1d_0 conda-forge
pyyaml 5.3.1 py37h8f50634_0 conda-forge
pyzmq 19.0.2 py37hac76be4_0 conda-forge
qt 5.12.9 h1f2b2cb_0 conda-forge
qtconsole 4.7.7 pyh9f0ad1d_0 conda-forge
qtpy 1.9.0 py_0 conda-forge
readline 8.0 he28a2e2_2 conda-forge
requests 2.24.0 pyh9f0ad1d_0 conda-forge
s3transfer 0.3.3 py37hc8dfbb8_1 conda-forge
scipy 1.5.2 py37hb14ef9d_0 conda-forge
send2trash 1.5.0 py_0 conda-forge
setuptools 49.6.0 py37hc8dfbb8_1 conda-forge
shapely 1.7.1 py37hedb1597_0 conda-forge
siphon 0.8.0 py37hc8dfbb8_1003 conda-forge
six 1.15.0 pyh9f0ad1d_0 conda-forge
soupsieve 2.0.1 py_1 conda-forge
sqlite 3.33.0 h4cf870e_0 conda-forge
tbb 2020.2 hc9558a2_0 conda-forge
terminado 0.9.1 py37hc8dfbb8_0 conda-forge
testpath 0.4.4 py_0 conda-forge
tiledb 2.0.8 h3effe38_1 conda-forge
tk 8.6.10 hed695b0_0 conda-forge
tornado 6.0.4 py37h8f50634_1 conda-forge
traitlets 5.0.4 py_1 conda-forge
tzcode 2020a h516909a_0 conda-forge
urllib3 1.25.10 py_0 conda-forge
wcwidth 0.2.5 pyh9f0ad1d_2 conda-forge
webencodings 0.5.1 py_1 conda-forge
wheel 0.35.1 pyh9f0ad1d_0 conda-forge
widgetsnbextension 3.5.1 py37hc8dfbb8_1 conda-forge
x264 1!152.20180806 h14c3975_0 conda-forge
xarray 0.16.1 py_0 conda-forge
xerces-c 3.2.3 hfe33f54_1 conda-forge
xorg-kbproto 1.0.7 h14c3975_1002 conda-forge
xorg-libice 1.0.10 h516909a_0 conda-forge
xorg-libsm 1.2.3 h84519dc_1000 conda-forge
xorg-libx11 1.6.12 h516909a_0 conda-forge
xorg-libxau 1.0.9 h14c3975_0 conda-forge
xorg-libxdmcp 1.1.3 h516909a_0 conda-forge
xorg-libxext 1.3.4 h516909a_0 conda-forge
xorg-libxrender 0.9.10 h516909a_1002 conda-forge
xorg-renderproto 0.11.1 h14c3975_1002 conda-forge
xorg-xextproto 7.3.0 h14c3975_1002 conda-forge
xorg-xproto 7.0.31 h14c3975_1007 conda-forge
xz 5.2.5 h516909a_1 conda-forge
yaml 0.2.5 h516909a_0 conda-forge
zeromq 4.3.2 he1b5a44_3 conda-forge
zipp 3.2.0 py_0 conda-forge
zlib 1.2.11 h516909a_1009 conda-forge
zstd 1.4.5 h6597ccf_2 conda-forge
I've had a chance to look into this a little bit, I think this is a scenario of NCEI not performing well. I was able to get it to work briefly, but then it failed again. I don't think there is anything we can do, except change the data source.