Western US SNOTEL Snow/Precipitation Update Report
Based on Mountain Data from NRCS SNOTEL Sites
**Provisional data, subject to revision**
Data based on the first reading of the day (typically 00:00) for Wednesday, December 29, 2021
State
  River Basin
Snow Water
Equivalent
Water Year-to-Date
Precipitation
# of
Sites
Percent of
Median
# of
Sites
Percent of
Median
ALASKA
  ANCHORAGE/SHIP CREEK BASIN 4/4 125    4/4 121   
  SUSITNA BASIN 1/5 60    3/5 89   
  NORTHERN KENAI MOUNTAINS 6/7 106    6/7 118   
  SOUTHERN KENAI 2/6 75    4/6 83   
  COPPER BASIN 2/3 73    2/3 54   
  PRINCE WILLIAM SOUND 1/7 119    3/7 87   
  CHENA BASIN 4/7 262    5/7 225   
  UPPER TANANA 2/4 191    2/4 180   
  KOYUKUK BASIN 2/6 203    4/6 142   
  CENTRAL YUKON BASIN 0/5 *   3/5 202   
  NORTON SOUND 0/4 *   2/4 121   
  KUPARUK-SAGAVANIRKTOK RIVER BASIN 0/3 *   3/3 134   
  NORTHWEST ARCTIC RIVER BASIN 1/1 162    1/1 129   
  SOUTHEAST ALASKA BASIN 1/3 127    1/3 68   
ARIZONA
  VERDE RIVER BASIN 9/10 146    8/10 103   
  SAN FRANCISCO PEAKS 1/1 149    1/1 117   
  CENTRAL MOGOLLON RIM 4/4 117    4/4 88   
  LITTLE COLORADO RIVER BASIN 11/11 124    11/11 93   
  SALT RIVER BASIN 9/10 85    8/10 74   
  SAN FRANCISCO / UPPER GILA RIVER BASIN 8/8 43    5/8 49   
  CHUSKA MOUNTAINS 2/2 175    2/2 115   
CALIFORNIA
  NORTHERN GREAT BASIN 7/8 158    7/8 159   
  TRUCKEE RIVER 11/12 240    11/12 223   
  LAKE TAHOE 11/11 230    11/11 222   
  CARSON RIVER 12/12 215    12/12 217   
  WALKER RIVER 7/7 221    7/7 234   
COLORADO
  GUNNISON RIVER BASIN 15/16 132    15/16 127   
  UPPER COLORADO RIVER BASIN 32/35 116    32/35 119   
  SOUTH PLATTE RIVER BASIN 21/22 94    21/22 101   
  LARAMIE AND NORTH PLATTE RIVER BASINS 12/12 110    12/12 115   
  YAMPA AND WHITE RIVER BASINS 20/22 108    21/22 121   
  ARKANSAS RIVER BASIN 11/11 71    11/11 79   
  UPPER RIO GRANDE BASIN 17/20 83    18/20 85   
  SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASINS 20/21 124    20/21 113   
IDAHO
  NORTHERN PANHANDLE REGION 10/10 102    9/10 128   
  COEUR D'ALENE-ST. JOE RIVER BASIN 7/7 115    7/7 113   
  CLEARWATER BASIN 16/16 108    16/16 111   
  SALMON BASIN 20/20 116    20/20 116   
  WEISER BASIN 4/4 122    4/4 117   
  PAYETTE BASIN 12/12 113    12/12 116   
  BOISE BASIN 10/11 118    10/11 126   
  BIG WOOD BASIN 8/9 140    8/9 134   
  LITTLE WOOD BASIN 4/5 159    4/5 188   
  BIG LOST BASIN 5/5 157    5/5 168   
  LITTLE LOST 3/3 137    3/3 154   
  BIRCH, MEDICINE LODGE, BEAVER, CAMAS BASINS 4/4 124    4/4 173   
  HENRYS FORK, TETON BASINS 8/8 100    8/8 114   
  SNAKE BASIN ABOVE PALISADES 21/21 98    21/21 111   
  WILLOW, BLACKFOOT, PORTNEUF BASINS 6/7 99    6/7 141   
  SNAKE BASIN ABOVE AMERICAN FALLS 29/29 99    29/29 117   
  RAFT BASIN 2/2 116    2/2 121   
  GOOSE CREEK BASIN 2/2 77    2/2 124   
  SALMON FALLS BASIN 4/6 81    4/6 122   
  BRUNEAU BASIN 5/8 88    5/8 126   
  OWYHEE BASIN 8/12 105    9/12 138   
  BEAR RIVER BASIN 21/21 102    21/21 131   
MONTANA
  KOOTENAI RIVER BASIN 8/8 118    8/8 147   
  FLATHEAD RIVER BASIN 14/17 111    14/17 131   
  UPPER CLARK FORK RIVER BASIN 14/14 93    14/14 98   
  BITTERROOT RIVER BASIN 8/8 94    8/8 106   
  LOWER CLARK FORK RIVER BASIN 9/9 114    9/9 117   
  JEFFERSON RIVER BASIN 19/21 92    19/21 116   
  MADISON RIVER BASIN 11/12 104    11/12 124   
  GALLATIN RIVER BASIN 7/7 94    7/7 110   
  MISSOURI HEADWATERS 31/31 96    31/31 115   
  HELENA VALLEY 4/4 75    4/4 91   
  SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS 7/9 81    7/9 74   
  SUN, TETON AND MARIAS RIVER BASINS 5/6 106    5/6 118   
  MISSOURI MAINSTEM RIVER BASIN 18/21 89    18/21 91   
  ST. MARYS RIVER BASIN 2/2 117    2/2 154   
  MILK RIVER BASIN 1/1 90    1/1 73   
  UPPER YELLOWSTONE RIVER BASIN 21/22 88    21/22 95   
  WIND RIVER BASIN (WYOMING) 11/13 100    11/13 109   
  SHOSHONE RIVER BASIN (WYOMING) 6/6 85    6/6 92   
  BIGHORN RIVER BASIN (WYOMING) 24/26 91    24/26 101   
  TONGUE RIVER BASIN (WYOMING) 7/7 84    7/7 116   
  POWDER RIVER BASIN (WYOMING) 7/7 83    7/7 108   
  LOWER YELLOWSTONE RIVER BASIN 33/35 89    33/35 106   
NEVADA
  NORTHERN GREAT BASIN 7/8 158    7/8 159   
  SNAKE RIVER 7/11 84    7/11 126   
  OWYHEE RIVER 6/10 102    7/10 138   
  UPPER HUMBOLDT RIVER 9/16 109    10/16 139   
  LOWER HUMBOLDT RIVER 6/10 136    7/10 168   
  CLOVER VALLEY & FRANKLIN RIVER 5/6 113    5/6 139   
  EASTERN NEVADA BASINS 5/14 166    5/14 161   
  SOUTHERN NEVADA - Spring Mountains 3/3 229    3/3 186   
NEW MEXICO
  RIO CHAMA RIVER BASIN 4/5 118    4/5 100   
  UPPER RIO GRANDE BASIN - New Mexico 10/12 56    10/12 59   
  SANGRE DE CRISTO MOUNTAIN RANGE BASINS 10/11 46    10/11 57   
  JEMEZ RIVER BASIN 3/4 89    3/4 65   
  SAN FRANCISCO RIVER BASIN 6/6 48    5/6 49   
  GILA RIVER BASIN 3/3 25    1/3 49   
  MIMBRES RIVER BASIN 2/2 21    1/2 18   
  PECOS RIVER BASIN 3/3 54    3/3 51   
  SAN JUAN RIVER BASIN 13/13 116    13/13 111   
  ANIMAS RIVER BASIN 7/7 117    7/7 116   
  CANADIAN RIVER BASIN 6/7 39    6/7 53   
  ZUNI/BLUEWATER RIVER BASIN 1/1 133    0/1 *  
  RIO HONDO BASIN 1/1 11    1/1 19   
  CHUSKA MOUNTAINS 2/2 175    2/2 115   
OREGON
  OWYHEE 8/12 105    9/12 138   
  MALHEUR 3/3 87    3/3 85   
  GRANDE RONDE, POWDER, BURNT, IMNAHA 19/19 101    19/19 98   
  UMATILLA, WALLA WALLA, WILLOW 10/10 105    10/10 99   
  JOHN DAY 13/13 85    13/13 91   
  UPPER DESCHUTES, CROOKED 14/14 107    14/14 97   
  HOOD, SANDY, LOWER DESCHUTES 9/9 147    9/9 112   
  COAST RANGE 2/2 1817    2/2 132   
  WILLAMETTE 21/23 143    21/23 107   
  ROGUE, UMPQUA 12/13 132    12/13 96   
  KLAMATH 18/20 122    18/20 102   
  LAKE COUNTY, GOOSE LAKE 6/7 134    6/7 126   
  HARNEY 11/12 134    11/12 134   
UTAH
  RAFT RIVER 2/2 116    2/2 121   
  BEAR RIVER 25/26 102    25/26 131   
  WEBER-OGDEN RIVERS 20/23 92    20/23 121   
  PROVO R.-UTAH LAKE-JORDAN R. 19/24 100    19/24 132   
  TOOELE VALLEY-VERNON CREEK 3/4 91    3/4 116   
  NORTHEASTERN UINTAHS 11/13 128    11/13 134   
  DUCHESNE RIVER 14/15 144    14/15 150   
  PRICE-SAN RAFAEL 8/14 123    8/14 152   
  DIRTY DEVIL 5/9 107    5/9 141   
  SOUTH EASTERN UTAH 5/11 133    5/11 141   
  UPPER SEVIER RIVER 17/23 131    18/23 132   
  SAN PITCH RIVER 6/12 109    6/12 133   
  LOWER SEVIER RIVER 3/5 110    3/5 126   
  BEAVER RIVER 3/3 146    3/3 142   
  ESCALANTE RIVER 4/5 123    4/5 123   
  SOUTHWESTERN UTAH 10/13 172    10/13 159   
WASHINGTON
  SPOKANE 9/9 108    9/9 111   
  LOWER PEND OREILLE 5/5 96    5/5 119   
  UPPER COLUMBIA 7/9 107    7/9 133   
  CENTRAL COLUMBIA 11/11 100    11/11 120   
  UPPER YAKIMA 7/7 91    7/7 112   
  NACHES 8/8 96    7/8 116   
  LOWER YAKIMA 3/4 97    3/4 110   
  KLICKITAT 4/5 103    4/5 113   
  LOWER SNAKE, WALLA WALLA 14/14 100    14/14 98   
  LOWER COLUMBIA 15/17 120    14/17 128   
  SOUTH PUGET SOUND 13/14 104    12/14 118   
  CENTRAL PUGET SOUND 9/9 117    9/9 123   
  NORTH PUGET SOUND 12/13 109    10/13 137   
  OLYMPIC 4/4 100    4/4 123   
WYOMING
  SNAKE RIVER 22/22 97    22/22 110   
  MADISON HEADWATERS IN WYOMING 4/5 111    4/5 118   
  YELLOWSTONE HEADWATERS IN WYOMING 11/12 95    11/12 99   
  WIND RIVER 9/11 102    9/11 113   
  BIGHORN BASIN 11/11 85    11/11 97   
  SHOSHONE RIVER 6/6 85    6/6 92   
  POWDER RIVER 7/7 83    7/7 108   
  TONGUE RIVER 7/7 84    7/7 116   
  BELLE FOURCHE 3/3 52    3/3 102   
  CHEYENNE RIVER BASIN 2/2 57    2/2 90   
  UPPER N. PLATTE 19/20 108    19/20 116   
  SWEETWATER 2/3 87    3/3 104   
  LOWER N. PLATTE 4/4 55    4/4 110   
  LARAMIE RIVER 7/7 99    7/7 109   
  S. PLATTE 1/1 29    1/1 81   
  LITTLE SNAKE RIVER 8/9 113    8/9 125   
  UPPER GREEN RIVER 13/15 92    14/15 112   
  LOWER GREEN RIVER 10/12 107    10/12 128   
  UPPER BEAR RIVER 12/12 107    12/12 132