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 MONDAY: DECEMBER 11 , 2023
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
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WYOMING
SNAKE RIVER
Base Camp 7060 3.6 4.8 75 7.3 7.8 94
Blind Bull Sum 8650 5.9 6.6 89 4.9 6.4 77
Cottonwood Creek 7670 6.2 5.9 105 9.6 8.0 120
East Rim Divide 7930 1.7 2.9 59 3.7 3.8 97
Grand Targhee 9260 13.2 14.7 90 12.2 12.6 97
Granite Creek 6770 2.4 4.0 60 4.6 6.4 72
Grassy Lake 7265 8.2 8.1 101 12.6 11.3 112
Gros Ventre Summit 8750 2.8 4.4 64 4.6 4.8 96
Gunsight Pass 9820 3.6 4.0 90 6.2 5.4 115
Lewis Lake Divide 7850 9.5 8.4 113 13.7 11.4 120
Loomis Park 8240 3.2 4.0 80 4.6 5.8 79
Phillips Bench 8200 5.7 7.0 81 8.6 8.8 98
Salt River Summit 7640 3.4 3.0 113 3.9 5.1 76
Snake River Station 6920 4.6 4.4 105 9.9 8.0 124
Somsen Ranch 6800 3.3 2.8 118 7.7 5.8 133
Spring Creek Divide 9000 -M 6.1 * -M 7.4 *
Thumb Divide 7980 5.1 4.1 124 6.9 6.2 111
Togwotee Pass 9580 5.9 8.2 72 6.9 8.7 79
Triple Peak 8500 5.8 6.2 94 7.6 8.0 95
Two Ocean Plateau 9240 8.8 10.2 86 10.1 9.7 104
Willow Creek 8080 6.7 7.2 93 11.5 11.0 105
Younts Peak 8350 4.4 4.8 92 34.4 5.5 625
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Basin Index (%) 91 119
MADISON HEADWATERS IN WYOMING
Black Bear 8170 9.6 10.4 92 13.4 12.9 104
Canyon 7870 2.8 -M * 5.1 -M *
Madison Plateau 7750 5.8 6.6 88 9.0 8.6 105
West Yellowstone 6700 1.2 2.9 41 5.6 5.1 110
Whiskey Creek 6800 3.1 4.0 78 8.0 6.8 118
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Basin Index (%) 82 108
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 5.6 7.4 76 5.8 7.0 83
Canyon 7870 2.8 -M * 5.1 -M *
Evening Star 9200 8.0 8.6 93 13.3 11.0 121
Fisher Creek 9100 7.2 10.4 69 9.7 11.4 85
Monument Peak 8850 5.0 6.4 78 7.9 8.0 99
Northeast Entrance 7350 .8 2.3 35 4.3 5.0 86
Parker Peak 9400 7.2 7.4 97 9.5 7.8 122
Sylvan Lake 8420 5.9 6.2 95 11.1 8.8 126
Thumb Divide 7980 5.1 4.1 124 6.9 6.2 111
Two Ocean Plateau 9240 8.8 10.2 86 10.1 9.7 104
White Mill 8700 5.8 7.6 76 7.1 8.3 86
Wolverine 7650 3.2 3.2 100 7.2 4.4 164
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Basin Index (%) 85 106
WIND RIVER
Burroughs Creek 8750 3.1 -M * 4.7 -M *
Castle Creek 8400 2.4 2.3 104 3.8 3.6 106
Cold Springs 9630 2.5 2.6 96 4.8 3.9 123
Deer Park 9700 4.9 4.6 107 6.8 6.1 111
Hobbs Park 10100 6.0 5.0 120 7.2 4.8 150
Kirwin 9550 5.5 3.9 141 7.5 4.9 153
Little Warm 9370 3.2 3.4 94 5.6 4.8 117
South Pass 9040 4.2 4.6 91 5.9 5.6 105
St. Lawrence Alt 8620 1.6 -M * 4.4 -M *
Togwotee Pass 9580 5.9 8.2 72 6.9 8.7 79
Townsend Creek 8700 3.1 3.0 103 6.5 4.6 141
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Basin Index (%) 100 117
BIGHORN BASIN
Bald Mtn. 9380 5.7 6.4 89 5.8 6.0 97
Bear Trap Meadow 8200 1.0 2.0 50 4.1 3.5 117
Bone Springs Div 9350 5.0 5.6 89 6.4 5.6 114
Grave Springs 8550 1.0 2.3 43 3.3 3.7 89
Kirwin 9550 5.5 3.9 141 7.5 4.9 153
Marquette 8760 5.5 3.0 183 8.6 4.2 205
Middle Powder 7760 1.8 2.8 64 4.2 4.2 100
Owl Creek 8975 1.2 2.0 60 3.5 2.7 130
Powder River Pass 9480 1.9 3.8 50 4.7 5.0 94
Shell Creek 9580 5.6 5.6 100 6.7 5.0 134
Timber Creek 7950 2.8 1.8 156 7.0 3.4 206
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Basin Index (%) 94 128
SHOSHONE RIVER
Blackwater 9780 9.1 8.8 103 9.8 8.2 120
Evening Star 9200 8.0 8.6 93 13.3 11.0 121
Marquette 8760 5.5 3.0 183 8.6 4.2 205
Sylvan Lake 8420 5.9 6.2 95 11.1 8.8 126
Sylvan Road 7120 2.9 3.6 81 8.6 6.8 126
Younts Peak 8350 4.4 4.8 92 34.4 5.5 625
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Basin Index (%) 102 193
POWDER RIVER
Bear Trap Meadow 8200 1.0 2.0 50 4.1 3.5 117
Cloud Peak Reservoir 9860 5.2 4.8 108 7.4 5.2 142
Grave Springs 8550 1.0 2.3 43 3.3 3.7 89
Hansen Sawmill 8360 .8 2.2 36 3.5 3.2 109
Middle Powder 7760 1.8 2.8 64 4.2 4.2 100
Powder River Pass 9480 1.9 3.8 50 4.7 5.0 94
Soldier Park 8720 1.0 1.6 62 5.3 3.7 143
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Basin Index (%) 65 114
TONGUE RIVER
Big Goose 7990 2.0 2.6 77 5.9 4.1 144
Bone Springs Div 9350 5.0 5.6 89 6.4 5.6 114
Burgess Junction 7880 2.7 3.2 84 6.4 4.5 142
Dome Lake 8880 2.0 3.6 56 5.7 4.9 116
Little Goose 8870 2.8 2.6 108 6.5 4.6 141
Sucker Creek 8880 3.9 3.8 103 7.3 5.2 140
Tie Creek 6870 .2 1.4 14 7.6 4.4 173
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Basin Index (%) 82 138
BELLE FOURCHE
Blind Park 6890 .7 2.0 35 2.8 4.0 70
Cole Canyon 5910 .4 1.4 29 2.3 3.4 68
North Rapid Creek 6130 1.4 2.2 64 3.2 3.1 103
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Basin Index (%) 45 79
CHEYENNE RIVER BASIN
Blind Park 6890 .7 2.0 35 2.8 4.0 70
North Rapid Creek 6130 1.4 2.2 64 3.2 3.1 103
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Basin Index (%) 50 85
UPPER N. PLATTE
Arapaho Ridge 10976 5.5 6.6 83 6.5 7.6 86
Blackhall Mtn 9839 8.1 8.8 92 10.3 9.9 104
Cinnabar Park 9707 3.8 6.6 58 5.1 7.7 66
Columbine 9167 6.0 5.4 111 7.8 7.8 100
Divide Peak 8730 4.2 5.4 78 7.8 7.4 105
Joe Wright 10158 4.3 6.5 66 7.1 9.1 78
Laprele Creek 8390 .9 2.4 38 3.7 4.4 84
Med Bow 10512 8.5 -M * 9.2 -M *
Never Summer 10323 5.7 5.9 97 5.0 6.2 81
North French Creek 10153 5.6 8.0 70 7.0 8.7 80
Old Battle 9860 6.9 8.8 78 8.4 11.2 75
Rawah 9069 2.2 3.3 67 5.3 6.0 88
Sage Creek Basin 7850 2.0 3.5 57 4.6 5.0 92
Sand Lake 10098 6.8 8.5 80 6.9 7.9 87
South Brush Creek 8495 .9 3.2 28 3.0 5.0 60
Tower 10620 11.1 12.0 92 11.2 12.6 89
Webber Springs 9260 5.1 6.5 78 6.1 9.1 67
Whiskey Park 9020 7.3 6.9 106 9.6 9.4 102
Willow Creek Pass 9523 4.2 4.3 98 5.1 5.0 102
Zirkel 9338 5.8 6.4 91 7.9 9.8 81
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Basin Index (%) 81 86
SWEETWATER
Deer Park 9700 4.9 4.6 107 6.8 6.1 111
Larsen Creek 9000 1.5 2.2 68 5.0 4.4 114
South Pass 9040 4.2 4.6 91 5.9 5.6 105
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Basin Index (%) 93 110
LOWER N. PLATTE
Casper Mtn. 7920 1.8 3.9 46 7.0 5.4 130
Laprele Creek 8390 .9 2.4 38 3.7 4.4 84
Reno Hill 8430 1.5 4.2 36 5.7 5.2 110
Windy Peak 7915 1.1 2.1 52 2.9 3.9 74
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Basin Index (%) 42 102
LARAMIE RIVER
Brooklyn Lake 10250 4.6 5.7 81 5.8 6.6 88
Cinnabar Park 9707 3.8 6.6 58 5.1 7.7 66
Crow Creek 8335 .5 2.3 22 2.8 4.1 68
Deadman Hill 10239 5.3 5.4 98 5.1 5.8 88
Rawah 9069 2.2 3.3 67 5.3 6.0 88
Roach 9740 3.3 4.8 69 5.0 6.6 76
Windy Peak 7915 1.1 2.1 52 2.9 3.9 74
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Basin Index (%) 69 79
S. PLATTE
Crow Creek 8335 .5 2.3 22 2.8 4.1 68
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Basin Index (%) 22 68
LITTLE SNAKE RIVER
Battle Mountain 7498 1.9 2.6 73 6.0 5.2 115
Divide Peak 8730 4.2 5.4 78 7.8 7.4 105
Elk River 8739 4.4 4.4 100 5.9 6.2 95
Elkhead Divide 8800 4.7 -M * 7.4 -M *
Little Snake River 8928 6.6 6.2 106 9.7 11.0 88
Old Battle 9860 6.9 8.8 78 8.4 11.2 75
Sage Creek Basin 7850 2.0 3.5 57 4.6 5.0 92
Sandstone RS 8152 3.9 3.0 130 5.0 6.0 83
Whiskey Park 9020 7.3 6.9 106 9.6 9.4 102
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Basin Index (%) 91 93
UPPER GREEN RIVER
Big Sandy Opening 9080 4.0 4.2 95 4.9 4.2 117
Blind Bull Sum 8650 5.9 6.6 89 4.9 6.4 77
East Rim Divide 7930 1.7 2.9 59 3.7 3.8 97
Elkhart Park G.S. 9400 2.3 3.8 61 4.0 4.8 83
Gros Ventre Summit 8750 2.8 4.4 64 4.6 4.8 96
Gunsight Pass 9820 3.6 4.0 90 6.2 5.4 115
Indian Creek 9425 5.8 6.3 92 6.3 6.3 100
Kendall R.S. 7740 1.4 3.4 41 4.4 5.0 88
Larsen Creek 9000 1.5 2.2 68 5.0 4.4 114
Loomis Park 8240 3.2 4.0 80 4.6 5.8 79
New Fork Lake 8340 2.0 3.4 59 2.0 3.9 51
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 2.3 3.3 70 4.1 4.7 87
Spring Creek Divide 9000 -M 6.1 * -M 7.4 *
Triple Peak 8500 5.8 6.2 94 7.6 8.0 95
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Basin Index (%) 77 92
LOWER GREEN RIVER
Blacks Fork Jct 8869 3.3 2.0 165 5.2 4.4 118
Buck Pasture 9632 4.3 -M * 5.8 -M *
EF Blacks Fork GS 9360 2.6 2.6 100 4.6 4.3 107
Hams Fork 7840 1.3 2.8 46 3.5 3.9 90
Henrys Fork 10182 -M -M * 4.6 -M *
Hewinta 9500 2.4 2.4 100 5.6 5.0 112
Hickerson Park 9122 2.5 1.9 132 5.2 4.1 127
Hole-in-Rock 9168 2.5 1.9 132 3.8 4.0 95
Indian Creek 9425 5.8 6.3 92 6.3 6.3 100
Kelley R.S. 8180 3.9 3.7 105 5.2 5.3 98
Spirit Lk 10235 2.6 3.8 68 6.1 6.3 97
Steel Creek Park 10158 4.3 4.4 98 6.4 6.1 105
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Basin Index (%) 98 104
UPPER BEAR RIVER
Bear River RS 8777 2.5 2.3 109 5.0 4.6 109
Bug Lake 7987 7.0 4.1 171 8.6 5.9 146
Burts Miller Ranch 8000 1.8 1.6 112 4.7 2.8 168
Chalk Creek #1 9171 5.4 6.2 87 7.8 7.9 99
Giveout 6930 2.2 2.0 110 4.0 4.2 95
Hayden Fork 9130 3.9 3.6 108 7.5 6.6 114
Kelley R.S. 8180 3.9 3.7 105 5.2 5.3 98
Lily Lake 9133 3.0 3.1 97 5.6 5.6 100
Monte Cristo 8932 7.6 6.2 123 9.5 7.4 128
Salt River Summit 7640 3.4 3.0 113 3.9 5.1 76
Spring Creek Divide 9000 -M 6.1 * -M 7.4 *
Trial Lake 9992 5.7 5.6 102 6.8 6.8 100
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Basin Index (%) 112 110
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-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.
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-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.
