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 THURSDAY: MARCH 9 , 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 14.8 15.4 96 16.6 17.4 95
Blind Bull Sum 8650 20.0 20.6 97 13.7 15.8 87
Cottonwood Creek 7670 20.4 18.9 108 21.5 21.2 101
East Rim Divide 7930 9.7 9.6 101 9.2 9.8 94
Grand Targhee 9260 36.7 34.2 107 22.1 26.5 83
Granite Creek 6770 13.7 15.2 90 11.7 16.3 72
Grassy Lake 7265 28.8 27.4 105 32.1 29.8 108
Gros Ventre Summit 8750 9.2 10.6 87 8.5 10.2 83
Gunsight Pass 9820 10.5 11.0 95 10.1 11.7 86
Lewis Lake Divide 7850 29.4 25.6 115 30.6 28.0 109
Loomis Park 8240 12.6 13.4 94 12.7 14.4 88
Phillips Bench 8200 24.3 22.1 110 24.4 23.0 106
Salt River Summit 7640 16.0 11.4 140 15.3 13.1 117
Snake River Station 6920 16.8 15.2 111 19.1 19.0 101
Somsen Ranch 6800 16.0 11.3 142 17.1 14.1 121
Spring Creek Divide 9000 -M 20.6 * -M 20.0 *
Thumb Divide 7980 16.2 13.5 120 15.3 14.8 103
Togwotee Pass 9580 18.5 20.3 91 17.3 21.4 81
Triple Peak 8500 20.1 20.8 97 20.5 21.9 94
Two Ocean Plateau 9240 25.4 24.1 105 20.2 22.3 91
Willow Creek 8080 29.5 25.4 116 28.4 28.0 101
Younts Peak 8350 13.8 13.0 106 11.1 12.4 90
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Basin Index (%) 106 97
MADISON HEADWATERS IN WYOMING
Black Bear 8170 35.3 32.2 110 32.8 31.9 103
Canyon 7870 12.2 -M * 14.2 -M *
Madison Plateau 7750 23.4 19.2 122 23.8 21.2 112
West Yellowstone 6700 13.2 9.6 138 16.0 12.4 129
Whiskey Creek 6800 16.7 13.8 121 20.8 16.9 123
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Basin Index (%) 118 113
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 15.4 18.8 82 14.4 17.4 83
Canyon 7870 12.2 -M * 14.2 -M *
Evening Star 9200 22.1 22.6 98 23.9 24.6 97
Fisher Creek 9100 28.5 27.7 103 29.2 27.2 107
Monument Peak 8850 17.7 17.4 102 19.9 18.0 111
Northeast Entrance 7350 8.6 9.4 91 10.8 11.4 95
Parker Peak 9400 19.5 18.4 106 18.7 17.2 109
Sylvan Lake 8420 16.3 16.8 97 19.3 19.2 101
Thumb Divide 7980 16.2 13.5 120 15.3 14.8 103
Two Ocean Plateau 9240 25.4 24.1 105 20.2 22.3 91
White Mill 8700 20.8 20.6 101 19.7 19.6 101
Wolverine 7650 11.8 10.5 112 11.0 10.7 103
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Basin Index (%) 101 100
WIND RIVER
Burroughs Creek 8750 8.8 -M * 9.0 -M *
Castle Creek 8400 5.1 6.9 74 5.7 7.4 77
Cold Springs 9630 6.8 6.3 108 8.3 7.4 112
Deer Park 9700 19.0 11.0 173 19.3 14.1 137
Hobbs Park 10100 12.2 11.2 109 11.5 10.0 115
Kirwin 9550 8.1 9.2 88 10.1 9.8 103
Little Warm 9370 8.4 8.4 100 9.4 10.0 94
South Pass 9040 15.4 12.2 126 14.8 12.6 117
St. Lawrence Alt 8620 5.5 -M * 7.5 -M *
Togwotee Pass 9580 18.5 20.3 91 17.3 21.4 81
Townsend Creek 8700 9.3 7.5 124 10.2 8.5 120
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Basin Index (%) 111 105
BIGHORN BASIN
Bald Mtn. 9380 15.9 15.9 100 13.0 13.4 97
Bear Trap Meadow 8200 7.8 5.4 144 7.9 6.6 120
Bone Springs Div 9350 12.3 13.6 90 10.1 12.7 80
Grave Springs 8550 8.7 7.0 124 9.1 7.6 120
Kirwin 9550 8.1 9.2 88 10.1 9.8 103
Marquette 8760 6.1 5.6 109 6.7 7.2 93
Middle Powder 7760 9.6 8.5 113 8.4 8.3 101
Owl Creek 8975 5.8 4.6 126 6.3 4.9 129
Powder River Pass 9480 9.7 9.2 105 11.7 10.2 115
Shell Creek 9580 11.7 12.4 94 12.0 11.2 107
Timber Creek 7950 4.4 4.2 105 4.8 6.0 80
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Basin Index (%) 105 102
SHOSHONE RIVER
Blackwater 9780 16.9 19.2 88 17.1 18.3 93
Evening Star 9200 22.1 22.6 98 23.9 24.6 97
Marquette 8760 6.1 5.6 109 6.7 7.2 93
Sylvan Lake 8420 16.3 16.8 97 19.3 19.2 101
Sylvan Road 7120 9.6 10.4 92 12.9 14.4 90
Younts Peak 8350 13.8 13.0 106 11.1 12.4 90
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Basin Index (%) 97 95
POWDER RIVER
Bear Trap Meadow 8200 7.8 5.4 144 7.9 6.6 120
Cloud Peak Reservoir 9860 12.1 12.2 99 11.7 10.8 108
Grave Springs 8550 8.7 7.0 124 9.1 7.6 120
Hansen Sawmill 8360 7.2 5.8 124 7.4 6.6 112
Middle Powder 7760 9.6 8.5 113 8.4 8.3 101
Powder River Pass 9480 9.7 9.2 105 11.7 10.2 115
Soldier Park 8720 6.7 5.7 118 6.6 7.5 88
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Basin Index (%) 115 109
TONGUE RIVER
Big Goose 7990 8.5 6.6 129 9.1 8.2 111
Bone Springs Div 9350 12.3 13.6 90 10.1 12.7 80
Burgess Junction 7880 10.6 9.0 118 12.0 9.6 125
Dome Lake 8880 9.4 9.4 100 10.0 9.8 102
Little Goose 8870 9.2 7.9 116 10.0 9.6 104
Sucker Creek 8880 11.6 10.4 112 14.0 11.5 122
Tie Creek 6870 8.0 4.8 167 11.2 8.8 127
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Basin Index (%) 113 109
BELLE FOURCHE
Blind Park 6890 8.3 6.8 122 9.7 9.0 108
Cole Canyon 5910 7.8 4.8 162 9.1 7.4 123
North Rapid Creek 6130 7.2 6.1 118 7.8 7.4 105
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Basin Index (%) 132 112
CHEYENNE RIVER BASIN
Blind Park 6890 8.3 6.8 122 9.7 9.0 108
North Rapid Creek 6130 7.2 6.1 118 7.8 7.4 105
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Basin Index (%) 120 107
UPPER N. PLATTE
Arapaho Ridge 10976 20.1 17.9 112 19.4 18.0 108
Blackhall Mtn 9839 31.8 23.5 135 31.2 23.2 134
Cinnabar Park 9707 -M 17.8 * 20.5 20.5 100
Columbine 9167 23.6 20.4 116 21.8 20.2 108
Divide Peak 8730 24.0 16.5 145 23.2 18.0 129
Joe Wright 10158 19.7 18.0 109 21.8 21.7 100
Laprele Creek 8390 10.6 7.8 136 11.1 9.4 118
Med Bow 10512 34.2 -M * 29.8 -M *
Never Summer 10323 -M 16.7 * -M 14.3 *
North French Creek 10153 26.1 22.8 114 25.6 22.0 116
Old Battle 9860 33.7 25.4 133 30.4 28.4 107
Rawah 9069 12.1 9.6 126 13.5 12.9 105
Sage Creek Basin 7850 22.0 11.9 185 18.4 10.9 169
Sand Lake 10098 24.5 22.0 111 23.6 19.7 120
South Brush Creek 8495 13.4 10.3 130 12.6 11.2 112
Tower 10620 42.0 37.5 112 38.6 33.4 116
Webber Springs 9260 24.5 18.2 135 26.4 21.0 126
Whiskey Park 9020 33.7 23.0 147 30.4 23.4 130
Willow Creek Pass 9523 13.5 10.8 125 13.6 11.1 123
Zirkel 9338 27.2 25.2 108 29.0 26.4 110
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Basin Index (%) 125 117
SWEETWATER
Deer Park 9700 19.0 11.0 173 19.3 14.1 137
Larsen Creek 9000 9.3 10.0 93 12.0 11.1 108
South Pass 9040 15.4 12.2 126 14.8 12.6 117
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Basin Index (%) 132 122
LOWER N. PLATTE
Casper Mtn. 7920 11.9 10.7 111 11.8 10.8 109
Laprele Creek 8390 10.6 7.8 136 11.1 9.4 118
Reno Hill 8430 13.1 11.2 117 14.4 11.6 124
Windy Peak 7915 9.8 6.6 148 10.4 7.8 133
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Basin Index (%) 125 120
LARAMIE RIVER
Brooklyn Lake 10250 22.1 17.3 128 22.1 17.9 123
Cinnabar Park 9707 -M 17.8 * 20.5 20.5 100
Crow Creek 8335 4.8 6.4 75 7.5 8.2 91
Deadman Hill 10239 16.1 13.9 116 14.9 14.0 106
Rawah 9069 12.1 9.6 126 13.5 12.9 105
Roach 9740 15.7 12.8 123 17.6 15.4 114
Windy Peak 7915 9.8 6.6 148 10.4 7.8 133
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Basin Index (%) 121 110
S. PLATTE
Crow Creek 8335 4.8 6.4 75 7.5 8.2 91
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Basin Index (%) 75 91
LITTLE SNAKE RIVER
Battle Mountain 7498 15.5 10.6 146 19.5 12.7 154
Divide Peak 8730 24.0 16.5 145 23.2 18.0 129
Elk River 8739 23.9 16.6 144 22.9 16.0 143
Elkhead Divide 8800 26.4 -M * 25.8 -M *
Little Snake River 8928 31.5 22.9 138 34.5 27.4 126
Old Battle 9860 33.7 25.4 133 30.4 28.4 107
Sage Creek Basin 7850 22.0 11.9 185 18.4 10.9 169
Sandstone RS 8152 20.4 11.4 179 21.4 15.5 138
Whiskey Park 9020 33.7 23.0 147 30.4 23.4 130
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Basin Index (%) 148 132
UPPER GREEN RIVER
Big Sandy Opening 9080 12.3 11.0 112 12.4 10.6 117
Blind Bull Sum 8650 20.0 20.6 97 13.7 15.8 87
East Rim Divide 7930 9.7 9.6 101 9.2 9.8 94
Elkhart Park G.S. 9400 9.8 10.4 94 9.0 10.8 83
Gros Ventre Summit 8750 9.2 10.6 87 8.5 10.2 83
Gunsight Pass 9820 10.5 11.0 95 10.1 11.7 86
Indian Creek 9425 22.6 19.6 115 19.4 17.0 114
Kendall R.S. 7740 9.7 10.8 90 10.1 11.6 87
Larsen Creek 9000 9.3 10.0 93 12.0 11.1 108
Loomis Park 8240 12.6 13.4 94 12.7 14.4 88
New Fork Lake 8340 9.0 9.2 98 -M 9.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 11.9 11.4 104 12.8 12.0 107
Spring Creek Divide 9000 -M 20.6 * -M 20.0 *
Triple Peak 8500 20.1 20.8 97 20.5 21.9 94
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Basin Index (%) 99 96
LOWER GREEN RIVER
Blacks Fork Jct 8869 11.1 7.3 152 11.7 10.0 117
Buck Pasture 9632 16.3 -M * 17.7 -M *
EF Blacks Fork GS 9360 11.9 9.9 120 9.2 9.3 99
Hams Fork 7840 12.6 9.8 129 11.7 9.2 127
Henrys Fork 10182 -M -M * 12.3 -M *
Hewinta 9500 10.9 8.6 127 13.1 11.0 119
Hickerson Park 9122 8.7 6.6 132 9.5 8.6 110
Hole-in-Rock 9168 7.4 6.1 121 8.9 8.1 110
Indian Creek 9425 22.6 19.6 115 19.4 17.0 114
Kelley R.S. 8180 16.9 12.6 134 17.5 14.0 125
Spirit Lk 10235 16.2 9.9 164 15.6 13.6 115
Steel Creek Park 10158 16.3 12.4 131 16.0 13.0 123
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Basin Index (%) 131 117
UPPER BEAR RIVER
Bear River RS 8777 11.8 8.0 148 13.1 9.6 136
Bug Lake 7987 23.5 15.9 148 19.0 15.0 127
Burts Miller Ranch 8000 7.9 5.7 139 11.8 6.1 193
Chalk Creek #1 9171 25.3 19.0 133 23.8 18.8 127
Giveout 6930 12.1 8.5 142 12.6 10.2 124
Hayden Fork 9130 17.2 12.8 134 21.6 16.9 128
Kelley R.S. 8180 16.9 12.6 134 17.5 14.0 125
Lily Lake 9133 13.4 10.8 124 14.3 12.9 111
Monte Cristo 8932 31.0 22.7 137 28.8 21.2 136
Salt River Summit 7640 16.0 11.4 140 15.3 13.1 117
Spring Creek Divide 9000 -M 20.6 * -M 20.0 *
Trial Lake 9992 27.5 18.6 148 26.8 18.4 146
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Basin Index (%) 139 131
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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.
