Wyoming Snow Precipitation Update
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: DECEMBER 9 , 2023
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 3.5 4.4 80 7.2 7.4 97
Blind Bull Sum 8650 5.7 6.3 90 4.9 6.4 77
Cottonwood Creek 7670 5.9 5.5 107 9.4 7.8 121
East Rim Divide 7930 1.6 2.5 64 3.4 3.8 89
Grand Targhee 9260 12.8 14.6 88 11.9 12.4 96
Granite Creek 6770 2.2 3.6 61 4.4 6.4 69
Grassy Lake 7265 8.0 7.6 105 12.3 10.9 113
Gros Ventre Summit 8750 2.8 4.2 67 4.6 4.8 96
Gunsight Pass 9820 3.5 4.0 88 6.1 5.2 117
Lewis Lake Divide 7850 9.2 8.1 114 13.5 11.2 121
Loomis Park 8240 3.1 3.8 82 4.5 5.6 80
Phillips Bench 8200 5.5 7.0 79 8.4 8.6 98
Salt River Summit 7640 3.3 2.8 118 3.7 5.0 74
Snake River Station 6920 4.4 4.2 105 9.6 7.9 122
Somsen Ranch 6800 3.2 2.7 119 7.4 5.6 132
Spring Creek Divide 9000 -M 5.8 * -M 7.4 *
Thumb Divide 7980 4.9 4.0 122 6.6 6.0 110
Togwotee Pass 9580 5.8 8.0 72 6.7 8.6 78
Triple Peak 8500 5.7 5.7 100 7.4 8.0 92
Two Ocean Plateau 9240 8.6 10.1 85 9.9 9.6 103
Willow Creek 8080 6.3 7.0 90 11.1 11.0 101
Younts Peak 8350 4.1 4.8 85 34.2 5.4 633
----- -----
Basin Index (%) 91 119
MADISON HEADWATERS IN WYOMING
Black Bear 8170 9.2 10.0 92 12.8 12.6 102
Canyon 7870 2.6 -M * 4.8 -M *
Madison Plateau 7750 5.6 6.5 86 8.6 8.5 101
West Yellowstone 6700 1.0 2.9 34 5.4 4.8 112
Whiskey Creek 6800 2.8 4.0 70 7.6 6.5 117
----- -----
Basin Index (%) 79 106
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 5.4 7.4 73 5.5 6.6 83
Canyon 7870 2.6 -M * 4.8 -M *
Evening Star 9200 7.8 8.4 93 12.8 10.8 119
Fisher Creek 9100 6.9 10.1 68 9.3 11.3 82
Monument Peak 8850 4.8 6.4 75 7.6 7.8 97
Northeast Entrance 7350 .6 2.2 27 4.2 4.8 88
Parker Peak 9400 6.7 7.2 93 9.0 7.6 118
Sylvan Lake 8420 5.6 6.0 93 10.8 8.6 126
Thumb Divide 7980 4.9 4.0 122 6.6 6.0 110
Two Ocean Plateau 9240 8.6 10.1 85 9.9 9.6 103
White Mill 8700 5.6 7.3 77 6.8 8.1 84
Wolverine 7650 3.0 3.0 100 7.0 4.4 159
----- -----
Basin Index (%) 83 105
WIND RIVER
Burroughs Creek 8750 3.4 -M * 4.7 -M *
Castle Creek 8400 2.4 2.2 109 3.8 3.6 106
Cold Springs 9630 2.4 2.6 92 4.8 3.8 126
Deer Park 9700 4.8 4.4 109 6.7 6.1 110
Hobbs Park 10100 6.0 4.6 130 7.2 4.6 157
Kirwin 9550 5.5 4.0 138 7.4 4.8 154
Little Warm 9370 3.2 3.3 97 5.4 4.8 112
South Pass 9040 4.2 4.4 95 5.9 5.4 109
St. Lawrence Alt 8620 1.7 -M * 4.4 -M *
Togwotee Pass 9580 5.8 8.0 72 6.7 8.6 78
Townsend Creek 8700 3.0 3.0 100 6.4 4.4 145
----- -----
Basin Index (%) 102 118
BIGHORN BASIN
Bald Mtn. 9380 5.5 6.4 86 5.6 5.9 95
Bear Trap Meadow 8200 1.0 2.0 50 3.9 3.4 115
Bone Springs Div 9350 4.9 5.6 88 6.3 5.5 115
Grave Springs 8550 .9 2.2 41 3.3 3.6 92
Kirwin 9550 5.5 4.0 138 7.4 4.8 154
Marquette 8760 5.4 2.9 186 8.5 4.0 212
Middle Powder 7760 1.7 2.8 61 4.0 4.2 95
Owl Creek 8975 1.2 2.0 60 3.2 2.7 119
Powder River Pass 9480 1.8 3.8 47 4.5 4.9 92
Shell Creek 9580 5.5 5.6 98 6.5 5.0 130
Timber Creek 7950 2.8 1.8 156 6.8 3.4 200
----- -----
Basin Index (%) 93 127
SHOSHONE RIVER
Blackwater 9780 9.0 8.7 103 9.4 8.0 118
Evening Star 9200 7.8 8.4 93 12.8 10.8 119
Marquette 8760 5.4 2.9 186 8.5 4.0 212
Sylvan Lake 8420 5.6 6.0 93 10.8 8.6 126
Sylvan Road 7120 2.8 3.6 78 8.5 6.8 125
Younts Peak 8350 4.1 4.8 85 34.2 5.4 633
----- -----
Basin Index (%) 101 193
POWDER RIVER
Bear Trap Meadow 8200 1.0 2.0 50 3.9 3.4 115
Cloud Peak Reservoir 9860 5.2 4.6 113 7.3 5.2 140
Grave Springs 8550 .9 2.2 41 3.3 3.6 92
Hansen Sawmill 8360 .7 2.2 32 3.4 3.2 106
Middle Powder 7760 1.7 2.8 61 4.0 4.2 95
Powder River Pass 9480 1.8 3.8 47 4.5 4.9 92
Soldier Park 8720 .7 1.6 44 5.2 3.6 144
----- -----
Basin Index (%) 62 112
TONGUE RIVER
Big Goose 7990 1.8 2.5 72 5.9 4.0 148
Bone Springs Div 9350 4.9 5.6 88 6.3 5.5 115
Burgess Junction 7880 2.6 3.2 81 6.3 4.4 143
Dome Lake 8880 2.0 3.6 56 5.6 4.9 114
Little Goose 8870 2.7 2.6 104 6.3 4.4 143
Sucker Creek 8880 3.7 3.8 97 7.1 5.2 137
Tie Creek 6870 .2 1.4 14 7.5 4.2 179
----- -----
Basin Index (%) 79 138
BELLE FOURCHE
Blind Park 6890 .8 2.0 40 2.8 4.0 70
Cole Canyon 5910 .3 1.3 23 2.1 3.4 62
North Rapid Creek 6130 1.2 2.2 55 3.2 3.0 107
----- -----
Basin Index (%) 42 78
CHEYENNE RIVER BASIN
Blind Park 6890 .8 2.0 40 2.8 4.0 70
North Rapid Creek 6130 1.2 2.2 55 3.2 3.0 107
----- -----
Basin Index (%) 48 86
UPPER N. PLATTE
Arapaho Ridge 10976 5.2 6.6 79 6.3 7.4 85
Blackhall Mtn 9839 7.5 8.5 88 9.9 9.8 101
Cinnabar Park 9707 3.4 6.2 55 4.8 7.4 65
Columbine 9167 5.6 5.1 110 7.3 7.6 96
Divide Peak 8730 4.0 5.4 74 7.5 7.0 107
Joe Wright 10158 4.0 6.2 65 6.8 8.6 79
Laprele Creek 8390 .8 2.2 36 3.6 4.2 86
Med Bow 10512 8.0 -M * 8.8 -M *
Never Summer 10323 5.7 5.9 97 4.8 6.0 80
North French Creek 10153 5.0 7.7 65 6.6 8.6 77
Old Battle 9860 6.6 8.7 76 8.0 10.9 73
Rawah 9069 1.9 3.2 59 5.1 6.0 85
Sage Creek Basin 7850 1.9 3.3 58 4.5 5.0 90
Sand Lake 10098 6.3 8.0 79 6.4 7.8 82
South Brush Creek 8495 .7 3.1 23 2.8 5.0 56
Tower 10620 10.1 12.0 84 10.4 12.4 84
Webber Springs 9260 4.9 6.1 80 5.9 8.5 69
Whiskey Park 9020 6.9 6.4 108 9.2 9.2 100
Willow Creek Pass 9523 4.1 4.3 95 5.0 4.8 104
Zirkel 9338 5.3 6.2 85 7.5 9.6 78
----- -----
Basin Index (%) 78 84
SWEETWATER
Deer Park 9700 4.8 4.4 109 6.7 6.1 110
Larsen Creek 9000 1.3 2.0 65 4.9 4.4 111
South Pass 9040 4.2 4.4 95 5.9 5.4 109
----- -----
Basin Index (%) 95 110
LOWER N. PLATTE
Casper Mtn. 7920 1.8 3.7 49 6.8 5.2 131
Laprele Creek 8390 .8 2.2 36 3.6 4.2 86
Reno Hill 8430 1.4 3.9 36 5.6 5.0 112
Windy Peak 7915 1.1 1.9 58 2.9 3.8 76
----- -----
Basin Index (%) 44 104
LARAMIE RIVER
Brooklyn Lake 10250 4.2 5.5 76 5.4 6.6 82
Cinnabar Park 9707 3.4 6.2 55 4.8 7.4 65
Crow Creek 8335 .5 2.1 24 2.7 4.1 66
Deadman Hill 10239 5.1 5.1 100 4.8 5.6 86
Rawah 9069 1.9 3.2 59 5.1 6.0 85
Roach 9740 3.0 4.7 64 4.7 6.3 75
Windy Peak 7915 1.1 1.9 58 2.9 3.8 76
----- -----
Basin Index (%) 67 76
S. PLATTE
Crow Creek 8335 .5 2.1 24 2.7 4.1 66
----- -----
Basin Index (%) 24 66
LITTLE SNAKE RIVER
Battle Mountain 7498 1.6 2.4 67 5.8 5.0 116
Divide Peak 8730 4.0 5.4 74 7.5 7.0 107
Elk River 8739 4.0 3.9 103 5.6 6.0 93
Elkhead Divide 8800 4.4 -M * 7.0 -M *
Little Snake River 8928 6.2 5.9 105 9.4 10.8 87
Old Battle 9860 6.6 8.7 76 8.0 10.9 73
Sage Creek Basin 7850 1.9 3.3 58 4.5 5.0 90
Sandstone RS 8152 3.7 2.7 137 4.8 5.8 83
Whiskey Park 9020 6.9 6.4 108 9.2 9.2 100
----- -----
Basin Index (%) 90 92
UPPER GREEN RIVER
Big Sandy Opening 9080 3.8 4.0 95 4.8 4.1 117
Blind Bull Sum 8650 5.7 6.3 90 4.9 6.4 77
East Rim Divide 7930 1.6 2.5 64 3.4 3.8 89
Elkhart Park G.S. 9400 2.2 3.7 59 4.0 4.6 87
Gros Ventre Summit 8750 2.8 4.2 67 4.6 4.8 96
Gunsight Pass 9820 3.5 4.0 88 6.1 5.2 117
Indian Creek 9425 5.6 6.0 93 6.1 6.0 102
Kendall R.S. 7740 1.3 3.2 41 4.4 5.0 88
Larsen Creek 9000 1.3 2.0 65 4.9 4.4 111
Loomis Park 8240 3.1 3.8 82 4.5 5.6 80
New Fork Lake 8340 2.0 3.0 67 1.8 3.7 49
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 2.1 3.0 70 4.0 4.5 89
Spring Creek Divide 9000 -M 5.8 * -M 7.4 *
Triple Peak 8500 5.7 5.7 100 7.4 8.0 92
----- -----
Basin Index (%) 79 92
LOWER GREEN RIVER
Blacks Fork Jct 8869 3.1 2.0 155 5.2 4.2 124
Buck Pasture 9632 4.3 -M * 5.7 -M *
EF Blacks Fork GS 9360 2.4 2.2 109 4.4 4.1 107
Hams Fork 7840 1.2 2.4 50 3.4 3.8 89
Henrys Fork 10182 -M -M * 4.8 -M *
Hewinta 9500 2.3 2.2 105 5.5 4.8 115
Hickerson Park 9122 2.2 1.8 122 5.1 4.0 128
Hole-in-Rock 9168 2.4 1.8 133 3.6 3.9 92
Indian Creek 9425 5.6 6.0 93 6.1 6.0 102
Kelley R.S. 8180 3.8 3.6 106 5.0 5.1 98
Spirit Lk 10235 2.3 3.7 62 5.9 6.1 97
Steel Creek Park 10158 4.3 4.1 105 6.3 6.0 105
----- -----
Basin Index (%) 99 105
UPPER BEAR RIVER
Bear River RS 8777 2.3 2.2 105 5.0 4.4 114
Bug Lake 7987 6.9 4.0 172 8.6 5.9 146
Burts Miller Ranch 8000 1.5 1.6 94 4.6 2.8 164
Chalk Creek #1 9171 5.3 5.8 91 7.6 7.7 99
Giveout 6930 2.0 1.8 111 3.9 4.2 93
Hayden Fork 9130 3.9 3.4 115 7.4 6.4 116
Kelley R.S. 8180 3.8 3.6 106 5.0 5.1 98
Lily Lake 9133 2.9 3.0 97 5.6 5.6 100
Monte Cristo 8932 7.6 5.9 129 9.3 7.2 129
Salt River Summit 7640 3.3 2.8 118 3.7 5.0 74
Spring Creek Divide 9000 -M 5.8 * -M 7.4 *
Trial Lake 9992 5.6 5.4 104 6.8 6.3 108
----- -----
Basin Index (%) 114 111
-----------------------------------------------------------------------------
-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Median (or Average) Snow Water Equivalent and
Total Precipitation values
If the Basin Index (%) value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Median (or Average) represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median (or Average) value for those sites on this day.
The TOTAL PRECIPITATION Percent of Median (or Average) represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Median (or Average) value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1991-2020.
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 or average for the day is less than 10% of the maximum
median or average value for the year.
* Basin - More than half of the stations for a basin with medians (or averages) report missing or invalid data
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians or averages and the resulting fraction
multiplied by 100.
----------------------------------------------------------------------------
-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Normal Snow Water Equivalent and
Total Precipitation values
If the Basin Index (%) value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
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 TOTAL 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.
Contact your state water supply staff for assistance.
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.
