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 THURSDAY: APRIL 18 , 2019
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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      50       112 
  SUSITNA BASIN ................................  3 of  5      88       121 
  NORTHERN KENAI MOUNTAINS .....................  7 of  7      52       128 
  SOUTHERN KENAI ...............................  2 of  6        *      133 
  COPPER BASIN .................................  1 of  3        *      115 
  PRINCE WILLIAM SOUND .........................  1 of  7        *         *
  CHENA BASIN ..................................  6 of  7      84        89 
  UPPER TANANA .................................  1 of  4        *         *
  KOYUKUK BASIN ................................  2 of  6        *      144 
  CENTRAL YUKON BASIN ..........................  0 of  5        *      109 
  NORTON SOUND .................................  0 of  4        *      123 
  KUPARUK-SAGAVANIRKTOK RIVER BASIN ............  0 of  3        *       93 
  NORTHWEST ARCTIC RIVER BASIN .................  0 of  1        *         *
  SOUTHEAST ALASKA BASIN .......................  1 of  3        *       85 
ARIZONA
  VERDE RIVER BASIN ............................  5 of 10        *      133 
  SAN FRANCISCO PEAKS ..........................  1 of  1     161       144 
  CENTRAL MOGOLLON RIM .........................  3 of  4       7*      128 
  LITTLE COLORADO - SOUTHERN HEADWATERS ........  5 of  6      10*      127 
  UPPER SALT RIVER BASIN / WHITE MOUNTAINS .....  7 of  9      62*      120 
  SAN FRANCISCO / UPPER GILA RIVER BASIN .......  7 of  8      31*      102 
  CHUSKA MOUNTAINS .............................  0 of  2        *         *
CALIFORNIA
  NORTHERN GREAT BASIN .........................  3 of  5     161*      117 
  TRUCKEE RIVER ................................  7 of  9     191       127 
  LAKE TAHOE ...................................  8 of  8     250       135 
  CARSON RIVER .................................  9 of  9     201       125 
  WALKER RIVER .................................  7 of  7     182       135 
  KLAMATH ...................................... 16 of 18     129*      108 
COLORADO
  GUNNISON RIVER BASIN ......................... 13 of 16     148       126 
  UPPER COLORADO RIVER BASIN ................... 27 of 31     130       116 
  SOUTH PLATTE RIVER BASIN ..................... 17 of 22     115       114 
  LARAMIE AND NORTH PLATTE RIVER BASINS ........ 12 of 12     119       116 
  YAMPA AND WHITE RIVER BASINS ................. 19 of 20     117       110 
  ARKANSAS RIVER BASIN .........................  7 of  9     135       114 
  UPPER RIO GRANDE BASIN ....................... 11 of 16     137       118 
  SAN MIGUEL, DOLORES, ANIMAS
     AND SAN JUAN RIVER BASIN .................. 17 of 19     160       126 
IDAHO
  NORTHERN PANHANDLE REGION .................... 10 of 10      90        83 
  SPOKANE RIVER BASIN .......................... 10 of 10      96        85 
  CLEARWATER BASIN ............................. 14 of 16     111        98 
  SALMON BASIN ................................. 21 of 22     121       108 
  WEISER BASIN .................................  4 of  4     170       125 
  PAYETTE BASIN ................................ 11 of 11     136       116 
  BOISE BASIN ..................................  9 of 10     129       118 
  BIG WOOD BASIN ...............................  8 of  9     136       115 
  LITTLE WOOD BASIN ............................  5 of  5     146       124 
  BIG LOST BASIN ...............................  5 of  5     136       119 
  LITTLE LOST, BIRCH BASINS ....................  4 of  4     121       109 
  MEDICINE LODGE, BEAVER, CAMAS BASINS .........  4 of  4     109       109 
  HENRYS FORK, TETON BASINS ....................  8 of  8     128       118 
  SNAKE BASIN ABOVE PALISADES .................. 18 of 18     122       110 
  WILLOW, BLACKFOOT, PORTNEUF BASINS ...........  5 of  6     160       121 
  SNAKE BASIN ABOVE AMERICAN FALLS ............. 28 of 29     129       114 
  RAFT BASIN ...................................  0 of  2        *         *
  GOOSE CREEK BASIN ............................  2 of  2     151       123 
  SALMON FALLS BASIN ...........................  5 of  6     145       125 
  BRUNEAU BASIN ................................  5 of  6     161       126 
  OWYHEE BASIN .................................  7 of  8     138       113 
  BEAR RIVER BASIN ............................. 14 of 15     138       115 
MONTANA
  KOOTENAI RIVER BASIN .........................  8 of  8      90        80 
  FLATHEAD RIVER BASIN ......................... 13 of 16      93        90 
  UPPER CLARK FORK RIVER BASIN ................. 13 of 15     109       101 
  BITTERROOT RIVER BASIN .......................  7 of  7     119       104 
  LOWER CLARK FORK RIVER BASIN .................  8 of  8     109        89 
  JEFFERSON RIVER BASIN ........................ 19 of 19     111       107 
  MADISON RIVER BASIN .......................... 11 of 11     123       115 
  GALLATIN RIVER BASIN .........................  7 of  7     120       122 
  MISSOURI HEADWATERS .......................... 31 of 31     117       113 
  HEADWATERS MISSOURI MAINSTEM .................  5 of  5     119       112 
  SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS ..  9 of 10     118       107 
  SUN, TETON AND MARIAS RIVER BASINS ...........  5 of  6     100        85 
  MISSOURI MAINSTEM RIVER BASIN ................ 19 of 21     112        99 
  ST. MARY AND MILK RIVER BASINS ...............  3 of  3      86        83 
  UPPER YELLOWSTONE RIVER BASIN ................ 22 of 24     120       113 
  WIND RIVER BASIN (WYOMING) ...................  9 of 13     113        93 
  SHOSHONE RIVER BASIN (WYOMING) ...............  4 of  6     111       117 
  BIGHORN RIVER BASIN (WYOMING) ................ 14 of 16      98        98 
  TONGUE RIVER BASIN (WYOMING) .................  6 of  7      80        74 
  POWDER RIVER BASIN (WYOMING) .................  6 of  7      87        82 
  LOWER YELLOWSTONE RIVER BASIN ................ 28 of 35      99        91 
NEVADA
  NORTHERN GREAT BASIN .........................  6 of  9     172*      116 
  SNAKE RIVER ..................................  7 of 11     158       125 
  OWYHEE RIVER .................................  5 of  5     149       116 
  UPPER HUMBOLDT RIVER .........................  9 of  9     187       130 
  LOWER HUMBOLDT RIVER .........................  5 of  9     185*      120 
  CLOVER VALLEY & FRANKLIN RIVER ...............  4 of  6     213       139 
  EASTERN NEVADA BASINS ........................  4 of  4     198       143 
NEW MEXICO
  RIO CHAMA RIVER BASIN ........................  4 of  4     120       120 
  UPPER RIO GRANDE BASIN .......................  9 of  9     132       119 
  SANGRE DE CRISTO MOUNTAIN RANGE BASINS .......  9 of 11     143       120 
  JEMEZ RIVER BASIN ............................  3 of  3     150       116 
  SAN FRANCISCO RIVER BASIN ....................  3 of  3      33*      100 
  GILA RIVER BASIN .............................  3 of  3      27*       84 
  MIMBRES RIVER BASIN ..........................  2 of  2        *       85 
  PECOS RIVER BASIN ............................  1 of  1     124       121 
  SAN JUAN RIVER HEADWATERS ....................  5 of  5     139       121 
  ANIMAS RIVER BASIN ...........................  7 of  7     165       131 
  CIMARRON RIVER BASIN .........................  2 of  2     395       120 
  ZUNI/BLUEWATER RIVER BASIN ...................  0 of  1        *      109 
  RIO HONDO BASIN ..............................  1 of  1      82       135 
  CHUSKA MOUNTAINS .............................  0 of  1        *         *
OREGON
  OWYHEE .......................................  7 of  8     138       113 
  MALHEUR ......................................  2 of  3     194*      119 
  GRANDE RONDE, POWDER, BURNT, IMNAHA .......... 16 of 17     160       117 
  UMATILLA, WALLA WALLA, WILLOW ................  6 of  8     211*      121 
  JOHN DAY ..................................... 11 of 13     236*      120 
  UPPER DESCHUTES, CROOKED ..................... 13 of 14     111       100 
  HOOD, SANDY, LOWER DESCHUTES .................  8 of  8      88        87 
  COAST RANGE ..................................  1 of  2        *       78 
  WILLAMETTE ................................... 19 of 23     110        95 
  ROGUE, UMPQUA ................................ 11 of 12     121       104 
  KLAMATH ...................................... 16 of 18     129*      108 
  LAKE COUNTY, GOOSE LAKE ......................  8 of  9     164*      114 
  HARNEY .......................................  6 of  9     150*      117 
UTAH
  RAFT RIVER ...................................  0 of  2        *         *
  BEAR RIVER ................................... 17 of 24     139       115 
  WEBER-OGDEN RIVERS ........................... 17 of 20     155       130 
  PROVO R.-UTAH LAKE-JORDAN R. ................. 14 of 17     169       132 
  TOOELE VALLEY-VERNON CREEK ...................  3 of  4     197       137 
  NORTHEASTERN UINTAHS .........................  6 of 10     135       119 
  DUCHESNE RIVER ............................... 11 of 13     162       134 
  PRICE-SAN RAFAEL .............................  6 of 11     172       138 
  DIRTY DEVIL ..................................  3 of  6     149       132 
  SOUTH EASTERN UTAH ...........................  3 of  6     267       154 
  UPPER SEVIER RIVER ........................... 12 of 17     173       135 
  SAN PITCH RIVER ..............................  5 of 11        *         *
  LOWER SEVIER RIVER ...........................  1 of  3        *         *
  BEAVER RIVER .................................  2 of  2     175       149 
  ESCALANTE RIVER ..............................  3 of  4     149       123 
  SOUTHWESTERN UTAH ............................  9 of 13     208*      138 
WASHINGTON
  NORTHERN PANHANDLE ........................... 10 of 10      90        83 
  SPOKANE ...................................... 10 of 10      96        85 
  UPPER COLUMBIA ...............................  5 of  6      85        79 
  CENTRAL COLUMBIA .............................  7 of  8      76        86 
  UPPER YAKIMA .................................  4 of  5      68        82 
  LOWER YAKIMA .................................  7 of  9      99        85 
  LOWER SNAKE .................................. 20 of 22     119       102 
  LOWER COLUMBIA ............................... 17 of 22      92        84 
  SOUTH PUGET SOUND ............................  7 of 10      87        86 
  CENTRAL PUGET SOUND ..........................  9 of  9      66        88 
  NORTH PUGET SOUND ............................  8 of 12      72        81 
  OLYMPIC ......................................  3 of  4      81        85 
WYOMING
  SNAKE RIVER .................................. 19 of 20     122       111 
  MADISON-GALLATIN .............................  5 of  5     132       116 
  YELLOWSTONE .................................. 13 of 14     122       112 
  WIND RIVER ...................................  9 of 12     113        93 
  BIGHORN BASIN ................................ 10 of 11      89        82 
  SHOSHONE RIVER ...............................  4 of  6     111       117 
  POWDER RIVER .................................  6 of  7      87        82 
  TONGUE RIVER .................................  6 of  7      80        74 
  BELLE FOURCHE ................................  2 of  2      96        93 
  CHEYENNE RIVER BASIN .........................  2 of  2      62        68 
  UPPER N. PLATTE .............................. 17 of 19     118       113 
  SWEETWATER ...................................  3 of  3     106        86 
  LOWER N. PLATTE ..............................  4 of  4     125       103 
  LARAMIE RIVER ................................  7 of  7     120       110 
  S. PLATTE ....................................  2 of  3     145       107 
  LITTLE SNAKE RIVER ...........................  8 of  8     125       110 
  UPPER GREEN RIVER ............................ 13 of 14     109       101 
  LOWER GREEN RIVER ............................  7 of 11     119       105 
  UPPER BEAR RIVER .............................  8 of 10     127       113 
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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