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: MARCH 18 , 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 18.2 98
Blind Bull Sum 8650 22.2 21.8 102 15.4 16.2 95
Cottonwood Creek 7670 21.9 19.8 111 23.0 22.4 103
East Rim Divide 7930 10.6 10.0 106 10.2 10.1 101
Grand Targhee 9260 38.4 36.6 105 -M 27.0 *
Granite Creek 6770 -M 15.6 * -M 16.8 *
Grassy Lake 7265 30.9 29.2 106 34.1 31.8 107
Gros Ventre Summit 8750 10.8 11.3 96 9.9 11.0 90
Gunsight Pass 9820 11.8 11.9 99 11.1 12.4 90
Lewis Lake Divide 7850 32.6 27.9 117 -M 29.4 *
Loomis Park 8240 14.2 13.8 103 14.4 15.4 94
Phillips Bench 8200 26.8 23.4 115 25.5 24.0 106
Salt River Summit 7640 17.3 12.2 142 16.6 13.7 121
Snake River Station 6920 18.2 16.1 113 20.3 19.6 104
Somsen Ranch 6800 17.4 11.6 150 18.5 14.6 127
Spring Creek Divide 9000 23.8 22.3 107 -M 21.6 *
Thumb Divide 7980 18.9 14.4 131 17.5 15.4 114
Togwotee Pass 9580 19.8 21.1 94 18.5 22.4 83
Triple Peak 8500 21.8 21.7 100 22.1 23.2 95
Two Ocean Plateau 9240 28.2 26.0 108 20.9 23.4 89
Willow Creek 8080 31.8 26.6 120 30.8 29.1 106
Younts Peak 8350 14.7 13.2 111 11.7 13.0 90
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Basin Index (%) 110 101
MADISON HEADWATERS IN WYOMING
Black Bear 8170 40.2 35.2 114 37.2 33.0 113
Canyon 7870 13.1 -M * 15.3 -M *
Madison Plateau 7750 27.0 20.3 133 26.3 22.0 120
West Yellowstone 6700 15.5 10.2 152 17.9 13.0 138
Whiskey Creek 6800 19.3 14.6 132 24.3 17.6 138
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Basin Index (%) 127 123
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 16.6 19.6 85 15.5 18.2 85
Canyon 7870 13.1 -M * 15.3 -M *
Evening Star 9200 24.2 23.4 103 25.9 25.6 101
Fisher Creek 9100 31.8 28.4 112 31.9 28.7 111
Monument Peak 8850 19.8 18.2 109 22.1 19.0 116
Northeast Entrance 7350 9.4 9.7 97 11.6 11.8 98
Parker Peak 9400 21.0 18.9 111 20.6 18.2 113
Sylvan Lake 8420 18.1 18.1 100 21.7 20.4 106
Thumb Divide 7980 18.9 14.4 131 17.5 15.4 114
Two Ocean Plateau 9240 28.2 26.0 108 20.9 23.4 89
White Mill 8700 22.8 21.6 106 21.4 20.8 103
Wolverine 7650 12.1 10.9 111 11.3 11.0 103
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Basin Index (%) 107 104
WIND RIVER
Burroughs Creek 8750 9.4 -M * 9.6 -M *
Castle Creek 8400 5.4 6.9 78 5.8 7.8 74
Cold Springs 9630 7.3 6.5 112 8.7 7.6 114
Deer Park 9700 21.6 12.0 180 21.8 15.0 145
Hobbs Park 10100 13.8 11.8 117 12.8 10.6 121
Kirwin 9550 8.8 9.4 94 11.0 10.1 109
Little Warm 9370 9.1 8.9 102 10.2 10.8 94
South Pass 9040 17.5 12.8 137 16.6 12.8 130
St. Lawrence Alt 8620 6.4 -M * 8.4 -M *
Togwotee Pass 9580 19.8 21.1 94 18.5 22.4 83
Townsend Creek 8700 10.3 8.0 129 11.3 8.9 127
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Basin Index (%) 117 110
BIGHORN BASIN
Bald Mtn. 9380 16.2 16.5 98 13.1 14.0 94
Bear Trap Meadow 8200 8.0 5.6 143 8.0 7.0 114
Bone Springs Div 9350 13.1 14.2 92 10.5 13.1 80
Grave Springs 8550 8.9 7.6 117 9.3 8.2 113
Kirwin 9550 8.8 9.4 94 11.0 10.1 109
Marquette 8760 6.4 6.1 105 6.9 7.6 91
Middle Powder 7760 10.1 9.0 112 8.5 8.7 98
Owl Creek 8975 6.2 4.8 129 6.5 5.1 127
Powder River Pass 9480 10.0 9.7 103 11.9 10.8 110
Shell Creek 9580 11.9 13.0 92 12.2 11.8 103
Timber Creek 7950 4.6 4.1 112 5.1 6.4 80
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Basin Index (%) 104 100
SHOSHONE RIVER
Blackwater 9780 18.5 20.3 91 18.7 19.3 97
Evening Star 9200 24.2 23.4 103 25.9 25.6 101
Marquette 8760 6.4 6.1 105 6.9 7.6 91
Sylvan Lake 8420 18.1 18.1 100 21.7 20.4 106
Sylvan Road 7120 10.3 10.8 95 13.9 14.9 93
Younts Peak 8350 14.7 13.2 111 11.7 13.0 90
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Basin Index (%) 100 98
POWDER RIVER
Bear Trap Meadow 8200 8.0 5.6 143 8.0 7.0 114
Cloud Peak Reservoir 9860 12.6 12.9 98 12.2 11.0 111
Grave Springs 8550 8.9 7.6 117 9.3 8.2 113
Hansen Sawmill 8360 7.3 5.8 126 7.5 7.4 101
Middle Powder 7760 10.1 9.0 112 8.5 8.7 98
Powder River Pass 9480 10.0 9.7 103 11.9 10.8 110
Soldier Park 8720 7.2 5.9 122 6.8 8.0 85
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Basin Index (%) 113 105
TONGUE RIVER
Big Goose 7990 8.7 7.2 121 9.4 8.6 109
Bone Springs Div 9350 13.1 14.2 92 10.5 13.1 80
Burgess Junction 7880 11.0 9.4 117 12.3 10.2 121
Dome Lake 8880 9.9 10.0 99 10.1 10.6 95
Little Goose 8870 9.6 8.3 116 10.4 9.9 105
Sucker Creek 8880 12.2 10.6 115 14.5 11.9 122
Tie Creek 6870 8.2 4.6 178 11.4 9.1 125
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Basin Index (%) 113 107
BELLE FOURCHE
Blind Park 6890 8.5 7.0 121 10.0 9.6 104
Cole Canyon 5910 7.8 5.0 156 9.0 7.6 118
North Rapid Creek 6130 7.2 6.2 116 7.7 7.8 99
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Basin Index (%) 129 107
CHEYENNE RIVER BASIN
Blind Park 6890 8.5 7.0 121 10.0 9.6 104
North Rapid Creek 6130 7.2 6.2 116 7.7 7.8 99
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Basin Index (%) 119 102
UPPER N. PLATTE
Arapaho Ridge 10976 21.7 19.2 113 20.8 19.1 109
Blackhall Mtn 9839 34.3 26.4 130 33.6 25.8 130
Cinnabar Park 9707 -M 18.1 * 21.1 21.0 100
Columbine 9167 25.4 20.8 122 22.9 21.2 108
Divide Peak 8730 25.7 17.0 151 25.9 18.4 141
Joe Wright 10158 20.8 18.2 114 22.9 22.8 100
Laprele Creek 8390 10.8 8.4 129 11.2 9.9 113
Med Bow 10512 35.8 -M * 30.7 -M *
Never Summer 10323 22.3 17.6 127 15.4 14.5 106
North French Creek 10153 27.3 24.0 114 26.6 22.8 117
Old Battle 9860 36.8 26.0 142 -M 29.1 *
Rawah 9069 12.9 9.6 134 14.7 13.2 111
Sage Creek Basin 7850 23.5 12.0 196 19.1 11.4 168
Sand Lake 10098 25.7 22.6 114 24.6 21.0 117
South Brush Creek 8495 14.2 10.8 131 13.1 11.7 112
Tower 10620 44.9 38.4 117 38.7 35.5 109
Webber Springs 9260 27.0 19.4 139 28.6 21.8 131
Whiskey Park 9020 35.4 24.3 146 31.9 24.3 131
Willow Creek Pass 9523 15.0 11.2 134 14.7 11.9 124
Zirkel 9338 29.1 26.0 112 30.8 27.6 112
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Basin Index (%) 129 118
SWEETWATER
Deer Park 9700 21.6 12.0 180 21.8 15.0 145
Larsen Creek 9000 10.3 10.5 98 13.1 11.4 115
South Pass 9040 17.5 12.8 137 16.6 12.8 130
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Basin Index (%) 140 131
LOWER N. PLATTE
Casper Mtn. 7920 12.2 11.5 106 12.0 11.2 107
Laprele Creek 8390 10.8 8.4 129 11.2 9.9 113
Reno Hill 8430 13.3 11.6 115 14.6 12.0 122
Windy Peak 7915 9.9 6.8 146 10.5 8.3 127
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Basin Index (%) 121 117
LARAMIE RIVER
Brooklyn Lake 10250 22.9 17.8 129 22.9 18.4 124
Cinnabar Park 9707 -M 18.1 * 21.1 21.0 100
Crow Creek 8335 4.8 6.6 73 7.5 9.3 81
Deadman Hill 10239 16.7 14.6 114 15.5 15.2 102
Rawah 9069 12.9 9.6 134 14.7 13.2 111
Roach 9740 16.4 13.6 121 18.3 15.8 116
Windy Peak 7915 9.9 6.8 146 10.5 8.3 127
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Basin Index (%) 121 109
S. PLATTE
Crow Creek 8335 4.8 6.6 73 7.5 9.3 81
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Basin Index (%) 73 81
LITTLE SNAKE RIVER
Battle Mountain 7498 16.1 11.1 145 20.1 13.1 153
Divide Peak 8730 25.7 17.0 151 25.9 18.4 141
Elk River 8739 26.1 16.6 157 24.6 16.8 146
Elkhead Divide 8800 28.5 -M * -M -M *
Little Snake River 8928 34.8 23.9 146 36.8 28.2 130
Old Battle 9860 36.8 26.0 142 -M 29.1 *
Sage Creek Basin 7850 23.5 12.0 196 19.1 11.4 168
Sandstone RS 8152 22.0 11.4 193 22.5 15.9 142
Whiskey Park 9020 35.4 24.3 146 31.9 24.3 131
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Basin Index (%) 155 141
UPPER GREEN RIVER
Big Sandy Opening 9080 13.5 11.7 115 13.6 11.2 121
Blind Bull Sum 8650 22.2 21.8 102 15.4 16.2 95
East Rim Divide 7930 10.6 10.0 106 10.2 10.1 101
Elkhart Park G.S. 9400 10.6 11.1 95 10.0 11.2 89
Gros Ventre Summit 8750 10.8 11.3 96 9.9 11.0 90
Gunsight Pass 9820 11.8 11.9 99 11.1 12.4 90
Indian Creek 9425 24.5 20.6 119 21.0 17.4 121
Kendall R.S. 7740 11.1 11.0 101 11.5 12.1 95
Larsen Creek 9000 10.3 10.5 98 13.1 11.4 115
Loomis Park 8240 14.2 13.8 103 14.4 15.4 94
New Fork Lake 8340 9.8 9.6 102 -M 9.5 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 13.1 12.0 109 13.9 12.6 110
Spring Creek Divide 9000 23.8 22.3 107 -M 21.6 *
Triple Peak 8500 21.8 21.7 100 22.1 23.2 95
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Basin Index (%) 104 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.1 7.8 155 12.7 10.5 121
Buck Pasture 9632 17.9 -M * 19.2 -M *
EF Blacks Fork GS 9360 12.7 10.4 122 10.0 9.8 102
Hams Fork 7840 14.0 10.2 137 12.5 9.4 133
Henrys Fork 10182 -M -M * 14.2 -M *
Hewinta 9500 11.3 8.6 131 14.0 11.4 123
Hickerson Park 9122 9.3 6.8 137 9.9 8.8 112
Hole-in-Rock 9168 8.4 6.4 131 9.2 8.5 108
Indian Creek 9425 24.5 20.6 119 21.0 17.4 121
Kelley R.S. 8180 18.1 13.1 138 18.6 14.4 129
Spirit Lk 10235 17.7 10.4 170 16.7 14.4 116
Steel Creek Park 10158 17.5 12.8 137 17.2 13.2 130
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Basin Index (%) 136 120
UPPER BEAR RIVER
Bear River RS 8777 13.2 8.4 157 14.2 10.1 141
Bug Lake 7987 25.6 16.5 155 21.0 15.5 135
Burts Miller Ranch 8000 9.2 4.9 188 12.4 6.6 188
Chalk Creek #1 9171 28.0 20.0 140 26.9 20.5 131
Giveout 6930 13.4 8.0 168 13.6 10.4 131
Hayden Fork 9130 19.6 13.6 144 23.9 17.5 137
Kelley R.S. 8180 18.1 13.1 138 18.6 14.4 129
Lily Lake 9133 13.9 11.2 124 15.5 13.6 114
Monte Cristo 8932 34.4 23.8 145 -M 21.9 *
Salt River Summit 7640 17.3 12.2 142 16.6 13.7 121
Spring Creek Divide 9000 23.8 22.3 107 -M 21.6 *
Trial Lake 9992 31.7 19.6 162 29.7 19.6 152
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Basin Index (%) 143 136
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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.
