SNOTEL (SNOwpack TELemetry) Snowpack Report - Western United States

SNOTEL Western U.S. Maps


United States           Natural Resources             Water and Climate Center
Department of           Conservation                          Portland, Oregon
Agriculture             Service                                               
 
          S N O W  -  P R E C I P I T A T I O N    U P D A T E
 
              Based on Mountain Data from NRCS SNOTEL Sites
                    As of SATURDAY: NOVEMBER 28 , 2020
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STATE                                                      PERCENT OF Normal
  RIVER BASIN                                     Number   Snow Water  Accum
                                                 of Sites  Equivalent  Precip
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ALASKA
  ANCHORAGE/SHIP CREEK BASIN ...................  4 of  4     164       116 
  SUSITNA BASIN ................................  3 of  5     112        83 
  NORTHERN KENAI MOUNTAINS .....................  7 of  7     153       100 
  SOUTHERN KENAI ...............................  3 of  6     187*      103 
  COPPER BASIN .................................  2 of  3      80        69 
  PRINCE WILLIAM SOUND .........................  1 of  7        *       94 
  CHENA BASIN ..................................  5 of  7     141       121 
  UPPER TANANA .................................  2 of  4      71          *
  KOYUKUK BASIN ................................  2 of  6        *       85 
  CENTRAL YUKON BASIN ..........................  0 of  5        *         *
  NORTON SOUND .................................  0 of  4        *      116 
  KUPARUK-SAGAVANIRKTOK RIVER BASIN ............  0 of  3        *       89 
  NORTHWEST ARCTIC RIVER BASIN .................  0 of  1        *         *
  SOUTHEAST ALASKA BASIN .......................  1 of  3        *       74 
ARIZONA
  VERDE RIVER BASIN ............................  5 of 10      33*         *
  SAN FRANCISCO PEAKS ..........................  1 of  1      89        51 
  CENTRAL MOGOLLON RIM .........................  3 of  4       0*       45 
  LITTLE COLORADO RIVER BASIN ..................  6 of 11      55*       53 
  SALT RIVER BASIN .............................  8 of 10      59*       42 
  SAN FRANCISCO / UPPER GILA RIVER BASIN .......  7 of  8      33*       39 
  CHUSKA MOUNTAINS .............................  0 of  2        *         *
CALIFORNIA
  NORTHERN GREAT BASIN .........................  7 of  8     120*       86 
  TRUCKEE RIVER ................................ 11 of 12     133*       57 
  LAKE TAHOE ................................... 11 of 11     150*       62 
  CARSON RIVER ................................. 12 of 12     169*       65 
  WALKER RIVER .................................  7 of  7      91*       52 
COLORADO
  GUNNISON RIVER BASIN ......................... 13 of 16      76        58 
  UPPER COLORADO RIVER BASIN ................... 31 of 35      80        68 
  SOUTH PLATTE RIVER BASIN ..................... 17 of 22      92        83 
  LARAMIE AND NORTH PLATTE RIVER BASINS ........ 11 of 12      78        72 
  YAMPA AND WHITE RIVER BASINS ................. 20 of 22      69        55 
  ARKANSAS RIVER BASIN .........................  9 of 11     106        85 
  UPPER RIO GRANDE BASIN ....................... 13 of 19     128        86 
  SAN MIGUEL, DOLORES, ANIMAS
     AND SAN JUAN RIVER BASIN .................. 18 of 21      91        57 
IDAHO
  NORTHERN PANHANDLE REGION ....................  9 of 10      88        98 
  COEUR D'ALENE-ST. JOE RIVER BASIN ............  7 of  7      93       109 
  CLEARWATER BASIN ............................. 15 of 16      98       113 
  SALMON BASIN ................................. 20 of 20     102        87 
  WEISER BASIN .................................  4 of  4     134        90 
  PAYETTE BASIN ................................ 12 of 12     128        89 
  BOISE BASIN ..................................  9 of 10     144       109 
  BIG WOOD BASIN ...............................  7 of  8     137        90 
  LITTLE WOOD BASIN ............................  4 of  4      84        69 
  BIG LOST BASIN ...............................  5 of  5      87        63 
  LITTLE LOST, BIRCH BASINS ....................  4 of  4      79        61 
  MEDICINE LODGE, BEAVER, CAMAS BASINS .........  2 of  2      79        55 
  HENRYS FORK, TETON BASINS ....................  8 of  8     103        92 
  SNAKE BASIN ABOVE PALISADES .................. 20 of 21     107        98 
  WILLOW, BLACKFOOT, PORTNEUF BASINS ...........  6 of  6     107        76 
  SNAKE BASIN ABOVE AMERICAN FALLS ............. 28 of 29     106        91 
  RAFT BASIN ...................................  1 of  2     150       112 
  GOOSE CREEK BASIN ............................  2 of  2     114        85 
  SALMON FALLS BASIN ...........................  4 of  6      87        82 
  BRUNEAU BASIN ................................  5 of  8      71        78 
  OWYHEE BASIN .................................  7 of 12      82*       67 
  BEAR RIVER BASIN ............................. 17 of 22      89        77 
MONTANA
  KOOTENAI RIVER BASIN .........................  8 of  8     102       124 
  FLATHEAD RIVER BASIN ......................... 12 of 17     133       144 
  UPPER CLARK FORK RIVER BASIN ................. 12 of 14     116       133 
  BITTERROOT RIVER BASIN .......................  8 of  8     101       137 
  LOWER CLARK FORK RIVER BASIN .................  9 of  9     104       114 
  JEFFERSON RIVER BASIN ........................ 19 of 20      93        99 
  MADISON RIVER BASIN .......................... 12 of 12      84        93 
  GALLATIN RIVER BASIN .........................  7 of  7      84       105 
  MISSOURI HEADWATERS .......................... 31 of 31      90        99 
  MISSOURI  HEADWATERS MAINSTEM ................  4 of  4     124       139 
  SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS ..  8 of  9     128       108 
  SUN, TETON AND MARIAS RIVER BASINS ...........  5 of  6     196       174 
  MISSOURI MAINSTEM RIVER BASIN ................ 19 of 21     148       144 
  ST. MARYS RIVER BASIN ........................  2 of  2     139       141 
  MILK RIVER BASIN .............................  1 of  1     383       191 
  UPPER YELLOWSTONE RIVER BASIN ................ 21 of 22     125       135 
  WIND RIVER BASIN (WYOMING) ................... 11 of 13      85        95 
  SHOSHONE RIVER BASIN (WYOMING) ...............  5 of  6     123       138 
  BIGHORN RIVER BASIN (WYOMING) ................ 21 of 26      98        96 
  TONGUE RIVER BASIN (WYOMING) .................  6 of  7      87       105 
  POWDER RIVER BASIN (WYOMING) .................  4 of  7     108        76 
  LOWER YELLOWSTONE RIVER BASIN ................ 28 of 35      97        99 
NEVADA
  NORTHERN GREAT BASIN .........................  7 of  8     120*       86 
  SNAKE RIVER ..................................  7 of 11      85        80 
  OWYHEE RIVER .................................  5 of 10      58*       61 
  UPPER HUMBOLDT RIVER .........................  9 of 16      83        66 
  LOWER HUMBOLDT RIVER .........................  5 of 10     161*       95 
  CLOVER VALLEY & FRANKLIN RIVER ...............  5 of  6      88        63 
  EASTERN NEVADA BASINS ........................  2 of 14        *         *
NEW MEXICO
  RIO CHAMA RIVER BASIN ........................  4 of  5      79        79 
  UPPER RIO GRANDE BASIN - New Mexico ..........  6 of 11      44*       58 
  SANGRE DE CRISTO MOUNTAIN RANGE BASINS .......  9 of 11      91        71 
  JEMEZ RIVER BASIN ............................  3 of  4      34*       71 
  SAN FRANCISCO RIVER BASIN ....................  5 of  6      29*       44 
  GILA RIVER BASIN .............................  3 of  3      14*       46 
  MIMBRES RIVER BASIN ..........................  2 of  2     100*       40 
  PECOS RIVER BASIN ............................  3 of  3      28        37 
  SAN JUAN RIVER BASIN ......................... 11 of 13      99        60 
  ANIMAS RIVER BASIN ...........................  7 of  7      79        37 
  CANADIAN RIVER BASIN .........................  4 of  6      47        68 
  ZUNI/BLUEWATER RIVER BASIN ...................  1 of  1        *       78 
  RIO HONDO BASIN ..............................  1 of  1      67*       47 
  CHUSKA MOUNTAINS .............................  0 of  2        *         *
OREGON
  OWYHEE .......................................  7 of 12      82*       67 
  MALHEUR ......................................  3 of  3     265*       94 
  GRANDE RONDE, POWDER, BURNT, IMNAHA .......... 18 of 19     145       108 
  UMATILLA, WALLA WALLA, WILLOW ................  8 of  9     167       128 
  JOHN DAY ..................................... 13 of 13     235       112 
  UPPER DESCHUTES, CROOKED ..................... 14 of 14     177        99 
  HOOD, SANDY, LOWER DESCHUTES .................  9 of  9     182       105 
  COAST RANGE ..................................  1 of  2        *       97 
  WILLAMETTE ................................... 18 of 23     168        98 
  ROGUE, UMPQUA ................................ 12 of 13     132        90 
  KLAMATH ...................................... 16 of 20     147        90 
  LAKE COUNTY, GOOSE LAKE ......................  6 of  7     143*       76 
  HARNEY ....................................... 11 of 12     216*      100 
UTAH
  RAFT RIVER ...................................  1 of  2     150       112 
  BEAR RIVER ................................... 19 of 25      91        77 
  WEBER-OGDEN RIVERS ........................... 16 of 22      83        59 
  PROVO R.-UTAH LAKE-JORDAN R. ................. 18 of 24      72        58 
  TOOELE VALLEY-VERNON CREEK ...................  3 of  4      64        46 
  NORTHEASTERN UINTAHS .........................  7 of 12      64        69 
  DUCHESNE RIVER ............................... 12 of 15      77        57 
  PRICE-SAN RAFAEL .............................  7 of 14      55        53 
  DIRTY DEVIL ..................................  6 of 11      63        49 
  SOUTH EASTERN UTAH ...........................  4 of 10        *         *
  UPPER SEVIER RIVER ........................... 14 of 23      41*       44 
  SAN PITCH RIVER ..............................  6 of 12      45        49 
  LOWER SEVIER RIVER ...........................  2 of  5        *         *
  BEAVER RIVER .................................  3 of  3      39        44 
  ESCALANTE RIVER ..............................  4 of  5      58        27 
  SOUTHWESTERN UTAH ............................ 10 of 13      56*       49 
WASHINGTON
  SPOKANE ......................................  9 of  9     100       107 
  LOWER PEND OREILLE ...........................  5 of  5      85        92 
  UPPER COLUMBIA ...............................  6 of  9     143       125 
  CENTRAL COLUMBIA .............................  8 of 11     111       124 
  UPPER YAKIMA .................................  6 of  7     147       117 
  NACHES .......................................  6 of  8     121       112 
  LOWER YAKIMA .................................  2 of  4     143        99 
  KLICKITAT ....................................  2 of  4     169        88 
  LOWER SNAKE, WALLA WALLA ..................... 13 of 14     126       112 
  LOWER COLUMBIA ............................... 11 of 17     157       105 
  SOUTH PUGET SOUND ............................ 10 of 14     152*      121 
  CENTRAL PUGET SOUND ..........................  9 of  9     208*      122 
  NORTH PUGET SOUND ............................  9 of 13     149*      112 
  OLYMPIC ......................................  3 of  4     226*       79 
WYOMING
  SNAKE RIVER .................................. 21 of 22     107        96 
  MADISON HEADWATERS IN WYOMING ................  5 of  5      95        93 
  YELLOWSTONE HEADWATERS IN WYOMING ............ 12 of 12     137       144 
  WIND RIVER ...................................  9 of 12      82        86 
  BIGHORN BASIN ................................  8 of 11      95        79 
  SHOSHONE RIVER ...............................  5 of  6     123       138 
  POWDER RIVER .................................  4 of  7     108        76 
  TONGUE RIVER .................................  6 of  7      87       105 
  BELLE FOURCHE ................................  3 of  3      58        79 
  CHEYENNE RIVER BASIN .........................  2 of  2      71        78 
  UPPER N. PLATTE .............................. 18 of 20      74        67 
  SWEETWATER ...................................  3 of  3      79        80 
  LOWER N. PLATTE ..............................  3 of  4      12        37 
  LARAMIE RIVER ................................  7 of  7      76        79 
  S. PLATTE ....................................  1 of  1       0        71 
  LITTLE SNAKE RIVER ...........................  8 of  9      72        50 
  UPPER GREEN RIVER ............................ 13 of 15      93        89 
  LOWER GREEN RIVER ............................  7 of 12      82        84 
  UPPER BEAR RIVER ............................. 11 of 13      89        79 
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   The Snow Water Equivalent Percent of Median represents the snow
   water equivalent found at selected SNOTEL sites in or near the
   basin compared to the Median value for those sites on this day.

   The Accumulated Precipitation Percent of Average represents the
   total precipitation (beginning October 1st) found at selected
   SNOTEL sites in or near the basin compared to the Average value
   for those sites on this day.

    * = Data are not available or data may not provide a valid measure 
        of conditions for over half of the sites within the basin.  
        Refer to the individual state reports for a complete data 
        listing and basin analysis.

Units = inches for the Current and Normal Snow Water Equivalent and
        Total Precipitation values

          Medians and averages are calculated for the period 1981-2010.

                   Provisional data, subject to revision.
                   
   * Site -- Either: (a) the current value is missing; (b) the median or 
   	 average for the day is not available or is zero; or (c) for snow water 
   	 equivalent, the median for the day is less than 10% of the maximum 
   	 median value for  the year.
   	 
   * Basin - More than half of the sites within the basin are flagged with *, 
     preventing the calculation of a meaningful basin index.  
     
   The basin index is calculated as the sum of the valid current values 
   divided by the sum of the corresponding medians (for snow water equivalent) 
   or averages (for precipitation) and the resulting fraction multiplied by 100.        
                   

Colorado Snow Water Content

River Basin Snow Water Content

River Basin Snow Water Content (Numeric)

Data courtesy the Western Regional Climate Center