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: MARCH 27 , 2021
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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     110        94 
  SUSITNA BASIN ................................  3 of  5     118        92 
  NORTHERN KENAI MOUNTAINS .....................  7 of  7     118        98 
  SOUTHERN KENAI ...............................  3 of  6     144       102 
  COPPER BASIN .................................  2 of  3     114        96 
  PRINCE WILLIAM SOUND .........................  1 of  7        *       96 
  CHENA BASIN ..................................  5 of  7     120       102 
  UPPER TANANA .................................  2 of  4      88          *
  KOYUKUK BASIN ................................  2 of  6        *       64 
  CENTRAL YUKON BASIN ..........................  0 of  5        *         *
  NORTON SOUND .................................  0 of  4        *       86 
  KUPARUK-SAGAVANIRKTOK RIVER BASIN ............  0 of  3        *       60 
  NORTHWEST ARCTIC RIVER BASIN .................  0 of  1        *         *
  SOUTHEAST ALASKA BASIN .......................  1 of  3        *      113 
ARIZONA
  VERDE RIVER BASIN ............................  5 of 10     236*       58 
  SAN FRANCISCO PEAKS ..........................  1 of  1      92        79 
  CENTRAL MOGOLLON RIM .........................  3 of  4      79        50 
  LITTLE COLORADO RIVER BASIN ..................  7 of 11      63        57 
  SALT RIVER BASIN .............................  9 of 10      20        47 
  SAN FRANCISCO / UPPER GILA RIVER BASIN .......  7 of  8      26*       48 
  CHUSKA MOUNTAINS .............................  0 of  2        *         *
CALIFORNIA
  NORTHERN GREAT BASIN .........................  7 of  8     100        83 
  TRUCKEE RIVER ................................ 11 of 12      71        57 
  LAKE TAHOE ................................... 11 of 11      73        58 
  CARSON RIVER ................................. 12 of 12      80        63 
  WALKER RIVER .................................  7 of  7      68        64 
COLORADO
  GUNNISON RIVER BASIN ......................... 13 of 16      92        79 
  UPPER COLORADO RIVER BASIN ................... 31 of 35      91        83 
  SOUTH PLATTE RIVER BASIN ..................... 17 of 22     103        97 
  LARAMIE AND NORTH PLATTE RIVER BASINS ........ 11 of 12      99        93 
  YAMPA AND WHITE RIVER BASINS ................. 20 of 22      92        82 
  ARKANSAS RIVER BASIN .........................  9 of 11     111        97 
  UPPER RIO GRANDE BASIN ....................... 13 of 19     112        90 
  SAN MIGUEL, DOLORES, ANIMAS
     AND SAN JUAN RIVER BASIN .................. 19 of 21      90        74 
IDAHO
  NORTHERN PANHANDLE REGION ....................  8 of 10      90        86 
  COEUR D'ALENE-ST. JOE RIVER BASIN ............  7 of  7     103        90 
  CLEARWATER BASIN ............................. 14 of 16     108        99 
  SALMON BASIN ................................. 20 of 20      93        84 
  WEISER BASIN .................................  4 of  4      97        84 
  PAYETTE BASIN ................................ 12 of 12      97        83 
  BOISE BASIN ..................................  9 of 10      93        85 
  BIG WOOD BASIN ...............................  7 of  8      80        70 
  LITTLE WOOD BASIN ............................  4 of  4      66        64 
  BIG LOST BASIN ...............................  5 of  5      69        63 
  LITTLE LOST, BIRCH BASINS ....................  4 of  4      83        78 
  MEDICINE LODGE, BEAVER, CAMAS BASINS .........  2 of  2      73        68 
  HENRYS FORK, TETON BASINS ....................  8 of  8      93        88 
  SNAKE BASIN ABOVE PALISADES .................. 21 of 21      93        85 
  WILLOW, BLACKFOOT, PORTNEUF BASINS ...........  6 of  6      86        79 
  SNAKE BASIN ABOVE AMERICAN FALLS ............. 29 of 29      92        84 
  RAFT BASIN ...................................  1 of  2     105        88 
  GOOSE CREEK BASIN ............................  2 of  2      96        85 
  SALMON FALLS BASIN ...........................  4 of  6     100        91 
  BRUNEAU BASIN ................................  5 of  8      97        93 
  OWYHEE BASIN .................................  7 of 12      85        77 
  BEAR RIVER BASIN ............................. 17 of 22      81        78 
MONTANA
  KOOTENAI RIVER BASIN .........................  8 of  8      83        93 
  FLATHEAD RIVER BASIN ......................... 11 of 17      94       101 
  UPPER CLARK FORK RIVER BASIN ................. 12 of 14     101        98 
  BITTERROOT RIVER BASIN .......................  7 of  8     105       107 
  LOWER CLARK FORK RIVER BASIN .................  9 of  9      93        87 
  JEFFERSON RIVER BASIN ........................ 19 of 20      95        92 
  MADISON RIVER BASIN .......................... 12 of 12      91        91 
  GALLATIN RIVER BASIN .........................  7 of  7      99       104 
  MISSOURI HEADWATERS .......................... 31 of 31      95        94 
  HELENA VALLEY ................................  3 of  4     102       101 
  SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS ..  8 of  9      98        89 
  SUN, TETON AND MARIAS RIVER BASINS ...........  5 of  6      92       101 
  MISSOURI MAINSTEM RIVER BASIN ................ 18 of 21      98        98 
  ST. MARYS RIVER BASIN ........................  2 of  2     101       101 
  MILK RIVER BASIN .............................  1 of  1     110       135 
  UPPER YELLOWSTONE RIVER BASIN ................ 21 of 22     104       105 
  WIND RIVER BASIN (WYOMING) ................... 11 of 13      94        95 
  SHOSHONE RIVER BASIN (WYOMING) ...............  5 of  6      98       107 
  BIGHORN RIVER BASIN (WYOMING) ................ 23 of 26      98        97 
  TONGUE RIVER BASIN (WYOMING) .................  6 of  7     108       108 
  POWDER RIVER BASIN (WYOMING) .................  6 of  7     119       109 
  LOWER YELLOWSTONE RIVER BASIN ................ 30 of 35     101       101 
NEVADA
  NORTHERN GREAT BASIN .........................  7 of  8     100        83 
  SNAKE RIVER ..................................  7 of 11      97        90 
  OWYHEE RIVER .................................  5 of 10      90        79 
  UPPER HUMBOLDT RIVER .........................  9 of 16      96        83 
  LOWER HUMBOLDT RIVER .........................  5 of 10     115        92 
  CLOVER VALLEY & FRANKLIN RIVER ...............  5 of  6      94        84 
  EASTERN NEVADA BASINS ........................  4 of 14        *         *
NEW MEXICO
  RIO CHAMA RIVER BASIN ........................  4 of  5      91        83 
  UPPER RIO GRANDE BASIN - New Mexico ..........  6 of 11      75        78 
  SANGRE DE CRISTO MOUNTAIN RANGE BASINS .......  9 of 11      98        89 
  JEMEZ RIVER BASIN ............................  3 of  4      66        74 
  SAN FRANCISCO RIVER BASIN ....................  5 of  6      26        48 
  GILA RIVER BASIN .............................  3 of  3      53*       54 
  MIMBRES RIVER BASIN ..........................  2 of  2        *       51 
  PECOS RIVER BASIN ............................  3 of  3      61        62 
  SAN JUAN RIVER BASIN ......................... 12 of 13      92        75 
  ANIMAS RIVER BASIN ...........................  7 of  7      88        69 
  CANADIAN RIVER BASIN .........................  4 of  6      92        92 
  ZUNI/BLUEWATER RIVER BASIN ...................  1 of  1    1100*       70 
  RIO HONDO BASIN ..............................  1 of  1       6        56 
  CHUSKA MOUNTAINS .............................  0 of  2        *         *
OREGON
  OWYHEE .......................................  7 of 12      85        77 
  MALHEUR ......................................  3 of  3     110        86 
  GRANDE RONDE, POWDER, BURNT, IMNAHA .......... 17 of 19     131       103 
  UMATILLA, WALLA WALLA, WILLOW ................  9 of 10     148       108 
  JOHN DAY ..................................... 13 of 13     129        93 
  UPPER DESCHUTES, CROOKED ..................... 13 of 14     110        91 
  HOOD, SANDY, LOWER DESCHUTES .................  9 of  9     134       106 
  COAST RANGE ..................................  1 of  2        *      101 
  WILLAMETTE ................................... 18 of 23     121        96 
  ROGUE, UMPQUA ................................ 12 of 13      97        81 
  KLAMATH ...................................... 16 of 20      85        72 
  LAKE COUNTY, GOOSE LAKE ......................  6 of  7      79        66 
  HARNEY ....................................... 11 of 12     119        88 
UTAH
  RAFT RIVER ...................................  1 of  2     105        88 
  BEAR RIVER ................................... 19 of 25      81        76 
  WEBER-OGDEN RIVERS ........................... 17 of 22      76        69 
  PROVO R.-UTAH LAKE-JORDAN R. ................. 18 of 24      82        73 
  TOOELE VALLEY-VERNON CREEK ...................  3 of  4      92        75 
  NORTHEASTERN UINTAHS .........................  7 of 12     102        92 
  DUCHESNE RIVER ............................... 13 of 15      79        69 
  PRICE-SAN RAFAEL .............................  7 of 14      75        70 
  DIRTY DEVIL ..................................  6 of 11      93        80 
  SOUTH EASTERN UTAH ...........................  4 of 10        *         *
  UPPER SEVIER RIVER ........................... 14 of 23      84        73 
  SAN PITCH RIVER ..............................  6 of 12      81        73 
  LOWER SEVIER RIVER ...........................  2 of  5        *         *
  BEAVER RIVER .................................  3 of  3      88        79 
  ESCALANTE RIVER ..............................  4 of  5      91        64 
  SOUTHWESTERN UTAH ............................ 10 of 13      69        61 
WASHINGTON
  SPOKANE ......................................  9 of  9     105        92 
  LOWER PEND OREILLE ...........................  5 of  5      93        85 
  UPPER COLUMBIA ...............................  6 of  9     119          *
  CENTRAL COLUMBIA .............................  8 of 11     117       106 
  UPPER YAKIMA .................................  3 of  7        *      105 
  NACHES .......................................  5 of  8     122       106 
  LOWER YAKIMA .................................  2 of  4     110        92 
  KLICKITAT ....................................  2 of  4     133        88 
  LOWER SNAKE, WALLA WALLA ..................... 12 of 14     132       106 
  LOWER COLUMBIA ............................... 10 of 17     140       103 
  SOUTH PUGET SOUND ............................  8 of 14     141*      114 
  CENTRAL PUGET SOUND ..........................  8 of  9     153       117 
  NORTH PUGET SOUND ............................  8 of 13     121       105 
  OLYMPIC ......................................  2 of  4     162        91 
WYOMING
  SNAKE RIVER .................................. 22 of 22      94        86 
  MADISON HEADWATERS IN WYOMING ................  5 of  5      93        87 
  YELLOWSTONE HEADWATERS IN WYOMING ............ 12 of 12     104       103 
  WIND RIVER ...................................  9 of 11      92        94 
  BIGHORN BASIN ................................ 10 of 11     105        93 
  SHOSHONE RIVER ...............................  5 of  6      98       107 
  POWDER RIVER .................................  6 of  7     119       109 
  TONGUE RIVER .................................  6 of  7     108       108 
  BELLE FOURCHE ................................  3 of  3      74        80 
  CHEYENNE RIVER BASIN .........................  2 of  2      75        80 
  UPPER N. PLATTE .............................. 18 of 20      98        92 
  SWEETWATER ...................................  3 of  3      79        82 
  LOWER N. PLATTE ..............................  4 of  4     120       107 
  LARAMIE RIVER ................................  7 of  7     115       108 
  S. PLATTE ....................................  1 of  1      80       102 
  LITTLE SNAKE RIVER ...........................  8 of  9      99        88 
  UPPER GREEN RIVER ............................ 14 of 15      87        83 
  LOWER GREEN RIVER ............................  7 of 12     101        96 
  UPPER BEAR RIVER ............................. 11 of 13      83        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