Snotel Narrative


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: JUNE 22 , 2017
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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        *       68 
  SUSITNA BASIN ................................  3 of  5        *       68 
  NORTHERN KENAI MOUNTAINS .....................  7 of  7      33*       79 
  SOUTHERN KENAI ...............................  3 of  6        *       76 
  COPPER BASIN .................................  2 of  3        *       71 
  PRINCE WILLIAM SOUND .........................  1 of  7        *       77 
  CHENA BASIN ..................................  6 of  7        *       95 
  UPPER TANANA .................................  2 of  5        *         *
  KOYUKUK BASIN ................................  2 of  6        *       66 
  CENTRAL YUKON BASIN ..........................  0 of  5        *       80 
  NORTON SOUND .................................  0 of  4        *       75 
  KUPARUK-SAGAVANIRKTOK RIVER BASIN ............  0 of  3        *       76 
  NORTHWEST ARCTIC RIVER BASIN .................  0 of  1        *         *
  SOUTHEAST ALASKA BASIN .......................  1 of  3        *       92 
ARIZONA
  VERDE RIVER BASIN ............................  5 of 10        *      120 
  SAN FRANCISCO PEAKS ..........................  0 of  1        *      135 
  CENTRAL MOGOLLON RIM .........................  3 of  4        *      120 
  LITTLE COLORADO - SOUTHERN HEADWATERS ........  5 of  6        *      119 
  UPPER SALT RIVER BASIN / WHITE MOUNTAINS .....  7 of  9        *      107 
  SAN FRANCISCO / UPPER GILA RIVER BASIN .......  7 of  8        *      103 
  CHUSKA MOUNTAINS .............................  0 of  2        *         *
CALIFORNIA
  NORTHERN GREAT BASIN .........................  3 of  5        *      133 
  TRUCKEE RIVER ................................  7 of  9    2312*      199 
  LAKE TAHOE ...................................  8 of  8        *      210 
  CARSON RIVER .................................  6 of  9        *      192 
  WALKER RIVER .................................  7 of  7     540*      204 
  KLAMATH ...................................... 14 of 18        *      134 
COLORADO
  GUNNISON RIVER BASIN ......................... 10 of 16        *      105 
  UPPER COLORADO RIVER BASIN ................... 23 of 31     900*      106 
  SOUTH PLATTE RIVER BASIN ..................... 15 of 22        *      113 
  LARAMIE AND NORTH PLATTE RIVER BASINS ........ 11 of 12      82*      110 
  YAMPA AND WHITE RIVER BASINS ................. 16 of 20     127*      100 
  ARKANSAS RIVER BASIN .........................  7 of  9        *      112 
  UPPER RIO GRANDE BASIN .......................  8 of 16      50*      105 
  SAN MIGUEL, DOLORES, ANIMAS
     AND SAN JUAN RIVER BASIN .................. 15 of 19     133*      108 
IDAHO
  NORTHERN PANHANDLE REGION ....................  9 of 10        *      132 
  SPOKANE RIVER BASIN .......................... 10 of 10     203*      126 
  CLEARWATER BASIN ............................. 15 of 16     175*      118 
  SALMON BASIN ................................. 20 of 22     254*      134 
  WEISER BASIN .................................  4 of  4        *      131 
  PAYETTE BASIN ................................ 10 of 11        *      141 
  BOISE BASIN ..................................  9 of 10    1233*      152 
  BIG WOOD BASIN ...............................  8 of  9     804*      160 
  LITTLE WOOD BASIN ............................  5 of  5        *      161 
  BIG LOST BASIN ...............................  5 of  5        *      160 
  LITTLE LOST, BIRCH BASINS ....................  3 of  4        *      135 
  MEDICINE LODGE, BEAVER, CAMAS BASINS .........  3 of  4        *      126 
  HENRYS FORK, TETON BASINS ....................  5 of  8     452*      138 
  SNAKE BASIN ABOVE PALISADES .................. 14 of 18     167*      147 
  WILLOW, BLACKFOOT, PORTNEUF BASINS ...........  6 of  6        *      143 
  SNAKE BASIN ABOVE AMERICAN FALLS ............. 23 of 29     245*      144 
  RAFT BASIN ...................................  1 of  2        *      145 
  GOOSE CREEK BASIN ............................  2 of  2        *      129 
  SALMON FALLS BASIN ...........................  5 of  5        *      127 
  BRUNEAU BASIN ................................  5 of  5        *      130 
  OWYHEE BASIN .................................  7 of  8        *      131 
  BEAR RIVER BASIN ............................. 14 of 15        *      142 
MONTANA
  KOOTENAI RIVER BASIN .........................  8 of  8     200*      126 
  FLATHEAD RIVER BASIN ......................... 13 of 16     138*      124 
  UPPER CLARK FORK RIVER BASIN ................. 13 of 15      10*      113 
  BITTERROOT RIVER BASIN .......................  7 of  7        *      116 
  LOWER CLARK FORK RIVER BASIN .................  8 of  8     239*      124 
  JEFFERSON RIVER BASIN ........................ 19 of 19     102*      113 
  MADISON RIVER BASIN .......................... 11 of 11     210*      122 
  GALLATIN RIVER BASIN .........................  7 of  7      44*      115 
  MISSOURI HEADWATERS .......................... 31 of 31     113*      116 
  HEADWATERS MISSOURI MAINSTEM .................  5 of  5        *      104 
  SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS ..  9 of 10        *       99 
  SUN, TETON AND MARIAS RIVER BASINS ...........  5 of  6        *      116 
  MISSOURI MAINSTEM RIVER BASIN ................ 19 of 21        *      105 
  ST. MARY AND MILK RIVER BASINS ...............  3 of  3     130*      120 
  UPPER YELLOWSTONE RIVER BASIN ................ 22 of 24     187*      125 
  WIND RIVER BASIN (WYOMING) ................... 11 of 13     191*      160 
  SHOSHONE RIVER BASIN (WYOMING) ...............  5 of  6     272*      154 
  BIGHORN RIVER BASIN (WYOMING) ................ 15 of 16     266*      131 
  TONGUE RIVER BASIN (WYOMING) .................  6 of  7        *      112 
  POWDER RIVER BASIN (WYOMING) .................  6 of  7        *      115 
  LOWER YELLOWSTONE RIVER BASIN ................ 30 of 35     235*      136 
NEVADA
  NORTHERN GREAT BASIN .........................  6 of  9        *      138 
  SNAKE RIVER ..................................  7 of 10        *      130 
  OWYHEE RIVER .................................  5 of  5        *      133 
  UPPER HUMBOLDT RIVER .........................  9 of  9        *      138 
  LOWER HUMBOLDT RIVER .........................  5 of  9        *      135 
  CLOVER VALLEY & FRANKLIN RIVER ...............  4 of  6        *      137 
  EASTERN NEVADA BASINS ........................  4 of  4        *      105 
NEW MEXICO
  RIO CHAMA RIVER BASIN ........................  4 of  4        *      125 
  UPPER RIO GRANDE BASIN .......................  7 of  9      50*      104 
  SANGRE DE CRISTO MOUNTAIN RANGE BASINS .......  8 of 11        *      104 
  JEMEZ RIVER BASIN ............................  2 of  3        *       95 
  SAN FRANCISCO RIVER BASIN ....................  3 of  3        *       96 
  GILA RIVER BASIN .............................  3 of  3        *      109 
  MIMBRES RIVER BASIN ..........................  2 of  2        *      119 
  PECOS RIVER BASIN ............................  1 of  1        *       87 
  SAN JUAN RIVER HEADWATERS ....................  4 of  5       0*       99 
  ANIMAS RIVER BASIN ...........................  7 of  7        *      107 
  CIMARRON RIVER BASIN .........................  1 of  2        *      106 
  ZUNI/BLUEWATER RIVER BASIN ...................  0 of  1        *      131 
  RIO HONDO BASIN ..............................  0 of  1        *       98 
  CHUSKA MOUNTAINS .............................  0 of  1        *         *
OREGON
  OWYHEE .......................................  7 of  8        *      131 
  MALHEUR ......................................  3 of  3        *      124 
  GRANDE RONDE, POWDER, BURNT, IMNAHA .......... 15 of 17        *      127 
  UMATILLA, WALLA WALLA, WILLOW ................  6 of  8        *      121 
  JOHN DAY ..................................... 13 of 13        *      123 
  UPPER DESCHUTES, CROOKED ..................... 14 of 14     211*      126 
  HOOD, SANDY, LOWER DESCHUTES .................  7 of  8      82*      121 
  COAST RANGE ..................................  1 of  2        *      139 
  WILLAMETTE ................................... 17 of 23     211*      128 
  ROGUE, UMPQUA ................................ 10 of 12     242*      137 
  KLAMATH ...................................... 14 of 18        *      134 
  LAKE COUNTY, GOOSE LAKE ......................  7 of  9        *      136 
  HARNEY .......................................  8 of  9        *      117 
UTAH
  RAFT RIVER ...................................  1 of  2        *      145 
  BEAR RIVER ................................... 17 of 24        *      145 
  WEBER-OGDEN RIVERS ........................... 17 of 20        *      129 
  PROVO R.-UTAH LAKE-JORDAN R. ................. 15 of 17        *      121 
  TOOELE VALLEY-VERNON CREEK ...................  3 of  4        *      115 
  NORTHEASTERN UINTAHS .........................  6 of 10        *      107 
  DUCHESNE RIVER ............................... 12 of 13        *      128 
  PRICE-SAN RAFAEL .............................  6 of 11        *      120 
  DIRTY DEVIL ..................................  3 of  6        *      111 
  SOUTH EASTERN UTAH ...........................  3 of  6        *       91 
  UPPER SEVIER RIVER ........................... 12 of 17        *      102 
  SAN PITCH RIVER ..............................  5 of 11        *         *
  LOWER SEVIER RIVER ...........................  1 of  3        *         *
  BEAVER RIVER .................................  2 of  2       0*      108 
  ESCALANTE RIVER ..............................  3 of  4        *       94 
  SOUTHWESTERN UTAH ............................ 10 of 13        *      105 
WASHINGTON
  NORTHERN PANHANDLE ...........................  9 of 10        *      132 
  SPOKANE ...................................... 10 of 10     203*      126 
  UPPER COLUMBIA ...............................  5 of  6   13600*      132 
  CENTRAL COLUMBIA .............................  7 of  8     165*      117 
  UPPER YAKIMA .................................  4 of  5     238*      105 
  LOWER YAKIMA .................................  7 of  9     211*      129 
  LOWER SNAKE .................................. 21 of 22     206*      120 
  LOWER COLUMBIA ............................... 17 of 22     278*      131 
  SOUTH PUGET SOUND ............................  7 of 10     145*      114 
  CENTRAL PUGET SOUND ..........................  9 of  9     231*      109 
  NORTH PUGET SOUND ............................  7 of 12     180*         *
  OLYMPIC ......................................  3 of  4        *      138 
WYOMING
  SNAKE RIVER .................................. 15 of 20     239*      145 
  MADISON-GALLATIN .............................  5 of  5     448*      129 
  YELLOWSTONE .................................. 12 of 13     249*      132 
  WIND RIVER ................................... 10 of 12     191*      159 
  BIGHORN BASIN ................................ 10 of 11       0*      114 
  SHOSHONE RIVER ...............................  4 of  5     272*      158 
  POWDER RIVER .................................  6 of  7        *      115 
  TONGUE RIVER .................................  6 of  7        *      112 
  BELLE FOURCHE ................................  1 of  1        *       83 
  CHEYENNE RIVER BASIN .........................  2 of  2        *       86 
  UPPER N. PLATTE .............................. 14 of 18     125*      108 
  SWEETWATER ...................................  3 of  3        *      161 
  LOWER N. PLATTE ..............................  4 of  4        *      101 
  LARAMIE RIVER ................................  6 of  6        *      104 
  S. PLATTE ....................................  2 of  3        *      105 
  LITTLE SNAKE RIVER ...........................  7 of  8        *      102 
  UPPER GREEN RIVER ............................ 10 of 13        *      156 
  LOWER GREEN RIVER ............................  7 of 11        *      135 
  UPPER BEAR RIVER .............................  7 of  9        *      135 
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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.        
                   

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