grib_filter_test.ipynb

{
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   "execution_count": 1,
   "id": "a8898c2e-4ec6-41ca-846a-c7241bfb6cc9",
   "metadata": {},
   "outputs": [],
   "source": [
    "import xarray as xr\n",
    "import fsspec"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "d2dbea82-491e-4c07-b711-ab13619b8b4c",
   "metadata": {},
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   "source": [
    "fs = fsspec.filesystem('s3', anon=True)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "d68a4293-5e78-45ad-96ca-84bcb6008785",
   "metadata": {},
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   "source": [
    "url = 's3://noaa-hrrr-bdp-pds/hrrr.20210902/conus/hrrr.t12z.wrfsfcf01.grib2'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "f14691c4-4d86-4dee-b4ff-5c30270fb8c5",
   "metadata": {},
   "outputs": [],
   "source": [
    "_ = fs.download(url, 'test.grib2')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "f9332063-90c5-4852-bef0-0c8a3618ac51",
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "Ignoring index file 'test.grib2.9810b.idx' older than GRIB file\n"
     ]
    }
   ],
   "source": [
    "ds = xr.open_dataset('test.grib2', engine='cfgrib', \n",
    "               backend_kwargs={'filter_by_keys': {'typeOfLevel': 'heightAboveGround', 'level': 2}})   "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "57d64a94-2c91-4460-90fb-37fb7f6e8390",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Data variables:\n",
       "    unknown  (y, x) float32 ...\n",
       "    t2m      (y, x) float32 ...\n",
       "    pt       (y, x) float32 ...\n",
       "    sh2      (y, x) float32 ...\n",
       "    d2m      (y, x) float32 ...\n",
       "    r2       (y, x) float32 ..."
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "ds.data_vars"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "1a26c620-cc15-4c37-8bff-dcf420821519",
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "Ignoring index file 'test.grib2.9810b.idx' older than GRIB file\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "Data variables:\n",
       "    u10      (y, x) float32 ...\n",
       "    v10      (y, x) float32 ...\n",
       "    si10     (y, x) float32 ...\n",
       "    unknown  (y, x) float32 ..."
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "ds1 = xr.open_dataset('test.grib2', engine='cfgrib', \n",
    "               backend_kwargs={'filter_by_keys': {'typeOfLevel': 'heightAboveGround', 'level': 10}})   \n",
    "ds1.data_vars"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "cce0dc27-926b-44e2-a34b-99b11b470990",
   "metadata": {},
   "outputs": [],
   "source": []
  }
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