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: MARCH 20 , 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 16.2 16.0 101 17.9 18.6 96
Blind Bull Sum 8650 22.7 22.1 103 15.5 16.6 93
Cottonwood Creek 7670 21.8 19.9 110 23.1 22.6 102
East Rim Divide 7930 10.7 10.0 107 10.3 10.2 101
Grand Targhee 9260 38.6 37.1 104 22.4 27.9 80
Granite Creek 6770 -M 15.8 * -M 16.9 *
Grassy Lake 7265 31.1 29.6 105 34.4 32.0 108
Gros Ventre Summit 8750 11.0 11.3 97 10.2 11.1 92
Gunsight Pass 9820 11.8 12.1 98 11.2 12.6 89
Lewis Lake Divide 7850 32.9 28.6 115 -M 29.5 *
Loomis Park 8240 14.3 14.2 101 14.5 15.6 93
Phillips Bench 8200 26.9 23.6 114 25.7 24.0 107
Salt River Summit 7640 17.7 12.4 143 16.8 13.8 122
Snake River Station 6920 18.3 16.5 111 20.5 19.8 104
Somsen Ranch 6800 17.5 11.5 152 18.6 14.7 127
Spring Creek Divide 9000 23.9 22.6 106 -M 21.8 *
Thumb Divide 7980 18.9 14.6 129 17.6 15.4 114
Togwotee Pass 9580 19.8 21.4 93 18.5 22.6 82
Triple Peak 8500 22.0 21.8 101 22.6 23.2 97
Two Ocean Plateau 9240 28.3 26.4 107 21.0 23.5 89
Willow Creek 8080 32.6 26.8 122 30.9 29.8 104
Younts Peak 8350 15.0 13.6 110 12.0 13.1 92
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Basin Index (%) 110 99
MADISON HEADWATERS IN WYOMING
Black Bear 8170 40.3 36.0 112 37.4 33.2 113
Canyon 7870 13.2 -M * 15.4 -M *
Madison Plateau 7750 27.2 20.5 133 26.4 22.0 120
West Yellowstone 6700 15.6 10.3 151 17.9 13.0 138
Whiskey Creek 6800 19.4 14.4 135 24.0 17.6 136
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Basin Index (%) 126 123
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 16.7 19.8 84 15.6 18.2 86
Canyon 7870 13.2 -M * 15.4 -M *
Evening Star 9200 24.3 23.7 103 26.0 25.7 101
Fisher Creek 9100 31.8 29.2 109 32.1 28.9 111
Monument Peak 8850 20.0 18.7 107 22.3 19.1 117
Northeast Entrance 7350 9.4 10.0 94 11.6 11.9 97
Parker Peak 9400 21.1 19.0 111 20.7 18.2 114
Sylvan Lake 8420 18.1 18.5 98 21.3 20.6 103
Thumb Divide 7980 18.9 14.6 129 17.6 15.4 114
Two Ocean Plateau 9240 28.3 26.4 107 21.0 23.5 89
White Mill 8700 22.8 22.0 104 21.5 21.0 102
Wolverine 7650 12.2 10.6 115 11.4 11.2 102
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Basin Index (%) 105 103
WIND RIVER
Burroughs Creek 8750 9.6 -M * 9.6 -M *
Castle Creek 8400 5.4 7.0 77 5.9 7.8 76
Cold Springs 9630 7.3 6.4 114 8.7 7.8 112
Deer Park 9700 21.6 12.6 171 21.9 15.7 139
Hobbs Park 10100 14.0 12.2 115 13.0 11.0 118
Kirwin 9550 8.9 9.4 95 11.1 10.3 108
Little Warm 9370 9.2 9.0 102 10.5 11.0 95
South Pass 9040 17.5 13.3 132 17.0 13.3 128
St. Lawrence Alt 8620 6.5 -M * 8.7 -M *
Togwotee Pass 9580 19.8 21.4 93 18.5 22.6 82
Townsend Creek 8700 10.4 8.0 130 11.4 9.0 127
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Basin Index (%) 115 109
BIGHORN BASIN
Bald Mtn. 9380 16.4 16.4 100 13.3 14.2 94
Bear Trap Meadow 8200 8.0 5.8 138 8.1 7.2 112
Bone Springs Div 9350 13.3 14.5 92 10.6 13.3 80
Grave Springs 8550 9.0 7.8 115 9.4 8.4 112
Kirwin 9550 8.9 9.4 95 11.1 10.3 108
Marquette 8760 6.4 6.2 103 7.0 7.7 91
Middle Powder 7760 10.2 9.1 112 8.6 8.8 98
Owl Creek 8975 6.3 4.8 131 6.7 5.2 129
Powder River Pass 9480 10.0 9.8 102 12.1 11.0 110
Shell Creek 9580 12.1 13.0 93 12.3 12.0 102
Timber Creek 7950 4.7 4.1 115 5.3 6.6 80
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Basin Index (%) 104 100
SHOSHONE RIVER
Blackwater 9780 18.7 20.4 92 19.0 19.5 97
Evening Star 9200 24.3 23.7 103 26.0 25.7 101
Marquette 8760 6.4 6.2 103 7.0 7.7 91
Sylvan Lake 8420 18.1 18.5 98 21.3 20.6 103
Sylvan Road 7120 10.7 11.2 96 13.9 15.1 92
Younts Peak 8350 15.0 13.6 110 12.0 13.1 92
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Basin Index (%) 100 98
POWDER RIVER
Bear Trap Meadow 8200 8.0 5.8 138 8.1 7.2 112
Cloud Peak Reservoir 9860 12.7 13.2 96 12.2 11.4 107
Grave Springs 8550 9.0 7.8 115 9.4 8.4 112
Hansen Sawmill 8360 7.4 5.8 128 7.6 7.5 101
Middle Powder 7760 10.2 9.1 112 8.6 8.8 98
Powder River Pass 9480 10.0 9.8 102 12.1 11.0 110
Soldier Park 8720 7.2 5.9 122 6.8 8.0 85
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Basin Index (%) 112 104
TONGUE RIVER
Big Goose 7990 8.8 7.3 121 9.4 8.6 109
Bone Springs Div 9350 13.3 14.5 92 10.6 13.3 80
Burgess Junction 7880 11.1 9.4 118 12.4 10.2 122
Dome Lake 8880 10.0 10.1 99 10.2 10.8 94
Little Goose 8870 9.6 8.3 116 10.4 10.0 104
Sucker Creek 8880 12.3 10.8 114 14.6 12.0 122
Tie Creek 6870 8.4 4.8 175 11.5 9.2 125
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Basin Index (%) 113 107
BELLE FOURCHE
Blind Park 6890 8.6 7.1 121 10.0 9.8 102
Cole Canyon 5910 8.1 5.0 162 9.3 7.6 122
North Rapid Creek 6130 7.3 6.4 114 8.0 8.0 100
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Basin Index (%) 130 107
CHEYENNE RIVER BASIN
Blind Park 6890 8.6 7.1 121 10.0 9.8 102
North Rapid Creek 6130 7.3 6.4 114 8.0 8.0 100
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Basin Index (%) 118 101
UPPER N. PLATTE
Arapaho Ridge 10976 21.8 19.3 113 20.9 19.1 109
Blackhall Mtn 9839 34.6 26.7 130 33.6 26.0 129
Cinnabar Park 9707 -M 18.1 * 21.2 21.0 101
Columbine 9167 25.9 21.6 120 23.2 21.7 107
Divide Peak 8730 26.0 17.4 149 26.1 19.0 137
Joe Wright 10158 21.2 18.4 115 23.0 23.0 100
Laprele Creek 8390 10.8 8.8 123 11.3 10.1 112
Med Bow 10512 36.0 -M * 30.8 -M *
Never Summer 10323 22.2 17.6 126 15.6 14.5 108
North French Creek 10153 27.7 24.5 113 26.7 23.2 115
Old Battle 9860 36.9 26.4 140 -M 29.7 *
Rawah 9069 13.2 10.2 129 14.7 13.8 107
Sage Creek Basin 7850 23.8 12.1 197 19.1 11.6 165
Sand Lake 10098 26.0 23.3 112 24.8 21.7 114
South Brush Creek 8495 14.5 10.6 137 13.1 12.0 109
Tower 10620 45.0 38.8 116 38.8 36.1 107
Webber Springs 9260 27.0 19.8 136 28.8 22.4 129
Whiskey Park 9020 36.1 24.4 148 32.1 24.8 129
Willow Creek Pass 9523 15.1 11.6 130 14.8 12.0 123
Zirkel 9338 29.4 26.0 113 30.9 27.6 112
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Basin Index (%) 128 116
SWEETWATER
Deer Park 9700 21.6 12.6 171 21.9 15.7 139
Larsen Creek 9000 10.6 10.4 102 13.2 11.6 114
South Pass 9040 17.5 13.3 132 17.0 13.3 128
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Basin Index (%) 137 128
LOWER N. PLATTE
Casper Mtn. 7920 12.3 11.8 104 12.0 11.4 105
Laprele Creek 8390 10.8 8.8 123 11.3 10.1 112
Reno Hill 8430 13.5 11.8 114 14.7 12.0 122
Windy Peak 7915 10.1 6.8 149 10.7 8.4 127
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Basin Index (%) 119 116
LARAMIE RIVER
Brooklyn Lake 10250 23.1 18.6 124 23.1 18.9 122
Cinnabar Park 9707 -M 18.1 * 21.2 21.0 101
Crow Creek 8335 4.8 6.5 74 7.7 9.3 83
Deadman Hill 10239 17.0 14.8 115 15.6 15.4 101
Rawah 9069 13.2 10.2 129 14.7 13.8 107
Roach 9740 16.6 14.0 119 18.5 16.2 114
Windy Peak 7915 10.1 6.8 149 10.7 8.4 127
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Basin Index (%) 120 108
S. PLATTE
Crow Creek 8335 4.8 6.5 74 7.7 9.3 83
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Basin Index (%) 74 83
LITTLE SNAKE RIVER
Battle Mountain 7498 16.6 11.0 151 20.4 13.2 155
Divide Peak 8730 26.0 17.4 149 26.1 19.0 137
Elk River 8739 26.5 16.5 161 24.7 17.0 145
Elkhead Divide 8800 29.0 -M * -M -M *
Little Snake River 8928 35.0 24.0 146 37.0 28.4 130
Old Battle 9860 36.9 26.4 140 -M 29.7 *
Sage Creek Basin 7850 23.8 12.1 197 19.1 11.6 165
Sandstone RS 8152 22.2 11.6 191 22.6 16.2 140
Whiskey Park 9020 36.1 24.4 148 32.1 24.8 129
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Basin Index (%) 156 140
UPPER GREEN RIVER
Big Sandy Opening 9080 13.8 12.0 115 13.8 11.5 120
Blind Bull Sum 8650 22.7 22.1 103 15.5 16.6 93
East Rim Divide 7930 10.7 10.0 107 10.3 10.2 101
Elkhart Park G.S. 9400 10.8 11.2 96 10.1 11.4 89
Gros Ventre Summit 8750 11.0 11.3 97 10.2 11.1 92
Gunsight Pass 9820 11.8 12.1 98 11.2 12.6 89
Indian Creek 9425 24.9 20.7 120 21.1 17.8 119
Kendall R.S. 7740 11.4 11.2 102 11.5 12.3 93
Larsen Creek 9000 10.6 10.4 102 13.2 11.6 114
Loomis Park 8240 14.3 14.2 101 14.5 15.6 93
New Fork Lake 8340 10.0 9.6 104 -M 9.6 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 13.1 12.1 108 14.0 12.7 110
Spring Creek Divide 9000 23.9 22.6 106 -M 21.8 *
Triple Peak 8500 22.0 21.8 101 22.6 23.2 97
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Basin Index (%) 105 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.2 7.8 156 12.8 10.6 121
Buck Pasture 9632 18.1 -M * 19.2 -M *
EF Blacks Fork GS 9360 13.2 10.6 125 10.1 9.8 103
Hams Fork 7840 14.0 10.3 136 12.6 9.5 133
Henrys Fork 10182 -M -M * 13.2 -M *
Hewinta 9500 11.7 9.1 129 14.2 11.9 119
Hickerson Park 9122 9.4 7.2 131 10.0 8.8 114
Hole-in-Rock 9168 8.5 6.6 129 9.6 8.6 112
Indian Creek 9425 24.9 20.7 120 21.1 17.8 119
Kelley R.S. 8180 18.4 13.2 139 18.7 14.5 129
Spirit Lk 10235 18.2 11.2 162 17.1 14.4 119
Steel Creek Park 10158 17.5 13.0 135 17.2 13.8 125
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Basin Index (%) 135 120
UPPER BEAR RIVER
Bear River RS 8777 13.0 8.4 155 14.2 10.2 139
Bug Lake 7987 25.6 16.8 152 21.0 15.8 133
Burts Miller Ranch 8000 9.1 4.9 186 12.6 6.6 191
Chalk Creek #1 9171 28.1 20.7 136 26.9 20.6 131
Giveout 6930 13.4 7.8 172 13.7 10.6 129
Hayden Fork 9130 19.9 13.2 151 23.8 18.1 131
Kelley R.S. 8180 18.4 13.2 139 18.7 14.5 129
Lily Lake 9133 14.0 11.2 125 15.4 13.7 112
Monte Cristo 8932 34.6 24.2 143 29.1 22.2 131
Salt River Summit 7640 17.7 12.4 143 16.8 13.8 122
Spring Creek Divide 9000 23.9 22.6 106 -M 21.8 *
Trial Lake 9992 32.0 19.6 163 30.0 19.8 152
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Basin Index (%) 143 134
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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.
