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 TUESDAY: MARCH 7 , 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 14.7 15.3 96 16.6 17.4 95
Blind Bull Sum 8650 19.8 20.2 98 13.5 15.8 85
Cottonwood Creek 7670 20.2 18.6 109 21.1 20.8 101
East Rim Divide 7930 9.5 9.5 100 9.0 9.6 94
Grand Targhee 9260 36.7 33.7 109 22.2 26.4 84
Granite Creek 6770 13.5 15.1 89 11.6 16.2 72
Grassy Lake 7265 28.5 27.1 105 32.1 29.4 109
Gros Ventre Summit 8750 9.0 10.4 87 8.3 10.2 81
Gunsight Pass 9820 10.4 10.8 96 9.9 11.5 86
Lewis Lake Divide 7850 29.2 25.2 116 30.6 27.4 112
Loomis Park 8240 12.4 13.4 93 12.6 14.4 88
Phillips Bench 8200 24.1 21.8 111 24.3 22.8 107
Salt River Summit 7640 15.8 11.2 141 15.1 13.0 116
Snake River Station 6920 16.8 15.0 112 19.1 18.8 102
Somsen Ranch 6800 15.8 11.0 144 17.0 14.1 121
Spring Creek Divide 9000 21.4 20.4 105 -M 19.9 *
Thumb Divide 7980 16.1 13.3 121 15.2 14.4 106
Togwotee Pass 9580 18.4 20.0 92 17.2 21.4 80
Triple Peak 8500 19.9 20.2 99 20.3 21.3 95
Two Ocean Plateau 9240 25.3 23.8 106 20.1 21.8 92
Willow Creek 8080 29.4 24.8 119 28.1 27.6 102
Younts Peak 8350 13.7 12.9 106 11.1 12.3 90
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Basin Index (%) 107 97
MADISON HEADWATERS IN WYOMING
Black Bear 8170 34.9 31.9 109 32.7 31.5 104
Canyon 7870 12.0 -M * 14.0 -M *
Madison Plateau 7750 23.2 18.6 125 23.6 20.8 113
West Yellowstone 6700 13.1 9.3 141 15.8 11.9 133
Whiskey Creek 6800 16.6 13.1 127 20.6 16.6 124
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Basin Index (%) 120 115
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 15.4 18.5 83 14.3 17.2 83
Canyon 7870 12.0 -M * 14.0 -M *
Evening Star 9200 22.1 22.5 98 23.9 24.5 98
Fisher Creek 9100 28.4 27.2 104 28.9 26.6 109
Monument Peak 8850 17.4 16.9 103 19.8 17.8 111
Northeast Entrance 7350 8.6 9.3 92 10.8 11.2 96
Parker Peak 9400 19.4 18.3 106 18.7 16.9 111
Sylvan Lake 8420 16.2 16.6 98 19.3 19.0 102
Thumb Divide 7980 16.1 13.3 121 15.2 14.4 106
Two Ocean Plateau 9240 25.3 23.8 106 20.1 21.8 92
White Mill 8700 20.7 20.4 101 19.7 19.0 104
Wolverine 7650 11.8 10.6 111 11.0 10.5 105
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Basin Index (%) 102 101
WIND RIVER
Burroughs Creek 8750 8.7 -M * 9.0 -M *
Castle Creek 8400 5.1 6.8 75 5.6 7.4 76
Cold Springs 9630 6.8 6.3 108 8.2 7.2 114
Deer Park 9700 18.9 10.8 175 19.2 13.5 142
Hobbs Park 10100 12.2 11.2 109 11.4 9.8 116
Kirwin 9550 8.0 8.8 91 10.0 9.4 106
Little Warm 9370 8.3 8.4 99 9.2 9.9 93
South Pass 9040 15.3 12.2 125 14.6 12.6 116
St. Lawrence Alt 8620 5.5 -M * 7.5 -M *
Togwotee Pass 9580 18.4 20.0 92 17.2 21.4 80
Townsend Creek 8700 9.3 7.3 127 10.2 8.4 121
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Basin Index (%) 111 106
BIGHORN BASIN
Bald Mtn. 9380 15.8 15.7 101 12.8 13.1 98
Bear Trap Meadow 8200 7.6 5.4 141 7.7 6.6 117
Bone Springs Div 9350 12.0 13.5 89 9.9 12.6 79
Grave Springs 8550 8.6 7.0 123 9.0 7.4 122
Kirwin 9550 8.0 8.8 91 10.0 9.4 106
Marquette 8760 6.1 5.6 109 6.7 7.1 94
Middle Powder 7760 9.6 8.4 114 8.2 7.8 105
Owl Creek 8975 5.8 4.5 129 6.2 4.9 127
Powder River Pass 9480 9.6 9.0 107 11.5 10.0 115
Shell Creek 9580 11.5 12.4 93 11.8 11.0 107
Timber Creek 7950 4.4 4.1 107 4.8 5.8 83
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Basin Index (%) 105 103
SHOSHONE RIVER
Blackwater 9780 16.8 18.8 89 17.0 18.0 94
Evening Star 9200 22.1 22.5 98 23.9 24.5 98
Marquette 8760 6.1 5.6 109 6.7 7.1 94
Sylvan Lake 8420 16.2 16.6 98 19.3 19.0 102
Sylvan Road 7120 9.6 10.4 92 12.8 14.4 89
Younts Peak 8350 13.7 12.9 106 11.1 12.3 90
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Basin Index (%) 97 95
POWDER RIVER
Bear Trap Meadow 8200 7.6 5.4 141 7.7 6.6 117
Cloud Peak Reservoir 9860 12.0 12.2 98 11.6 10.6 109
Grave Springs 8550 8.6 7.0 123 9.0 7.4 122
Hansen Sawmill 8360 7.0 5.6 125 7.3 6.6 111
Middle Powder 7760 9.6 8.4 114 8.2 7.8 105
Powder River Pass 9480 9.6 9.0 107 11.5 10.0 115
Soldier Park 8720 6.5 5.7 114 6.4 7.5 85
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Basin Index (%) 114 109
TONGUE RIVER
Big Goose 7990 8.4 6.4 131 9.1 8.0 114
Bone Springs Div 9350 12.0 13.5 89 9.9 12.6 79
Burgess Junction 7880 10.6 8.9 119 11.8 9.5 124
Dome Lake 8880 9.3 9.2 101 9.9 9.7 102
Little Goose 8870 9.2 7.8 118 10.0 9.6 104
Sucker Creek 8880 11.5 10.2 113 13.8 11.2 123
Tie Creek 6870 8.0 4.6 174 11.1 8.8 126
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Basin Index (%) 114 109
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 6.0 120 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 6.0 120 7.8 7.4 105
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Basin Index (%) 121 107
UPPER N. PLATTE
Arapaho Ridge 10976 20.0 17.8 112 19.4 17.8 109
Blackhall Mtn 9839 31.5 23.1 136 31.0 23.1 134
Cinnabar Park 9707 -M 17.5 * 20.2 20.0 101
Columbine 9167 23.4 20.4 115 21.7 19.8 110
Divide Peak 8730 23.8 16.1 148 22.9 17.6 130
Joe Wright 10158 19.7 17.8 111 21.8 21.5 101
Laprele Creek 8390 10.6 7.8 136 11.0 9.2 120
Med Bow 10512 33.8 -M * 29.6 -M *
Never Summer 10323 -M 16.4 * -M 14.2 *
North French Creek 10153 25.8 22.7 114 25.4 22.0 115
Old Battle 9860 33.5 25.2 133 30.4 27.8 109
Rawah 9069 12.1 9.6 126 13.5 12.8 105
Sage Creek Basin 7850 21.9 11.9 184 18.2 10.8 169
Sand Lake 10098 24.2 21.8 111 23.3 19.6 119
South Brush Creek 8495 13.2 10.2 129 12.4 11.2 111
Tower 10620 42.0 37.4 112 38.5 32.9 117
Webber Springs 9260 24.2 17.9 135 26.1 20.9 125
Whiskey Park 9020 33.3 22.8 146 30.3 23.4 129
Willow Creek Pass 9523 13.5 10.6 127 13.6 11.0 124
Zirkel 9338 27.0 25.0 108 28.9 26.4 109
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Basin Index (%) 126 117
SWEETWATER
Deer Park 9700 18.9 10.8 175 19.2 13.5 142
Larsen Creek 9000 9.2 10.0 92 11.9 11.0 108
South Pass 9040 15.3 12.2 125 14.6 12.6 116
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Basin Index (%) 132 123
LOWER N. PLATTE
Casper Mtn. 7920 11.9 10.6 112 11.7 10.6 110
Laprele Creek 8390 10.6 7.8 136 11.0 9.2 120
Reno Hill 8430 13.0 11.2 116 14.3 11.3 127
Windy Peak 7915 9.7 6.4 152 10.4 7.7 135
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Basin Index (%) 126 122
LARAMIE RIVER
Brooklyn Lake 10250 21.9 17.4 126 21.8 17.6 124
Cinnabar Park 9707 -M 17.5 * 20.2 20.0 101
Crow Creek 8335 4.8 6.0 80 7.5 8.1 93
Deadman Hill 10239 16.0 13.6 118 14.8 13.9 106
Rawah 9069 12.1 9.6 126 13.5 12.8 105
Roach 9740 15.6 12.6 124 17.5 15.2 115
Windy Peak 7915 9.7 6.4 152 10.4 7.7 135
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Basin Index (%) 122 111
S. PLATTE
Crow Creek 8335 4.8 6.0 80 7.5 8.1 93
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Basin Index (%) 80 93
LITTLE SNAKE RIVER
Battle Mountain 7498 15.3 10.6 144 19.2 12.6 152
Divide Peak 8730 23.8 16.1 148 22.9 17.6 130
Elk River 8739 23.8 16.2 147 22.9 15.9 144
Elkhead Divide 8800 26.3 -M * 25.8 -M *
Little Snake River 8928 31.3 23.0 136 34.1 27.2 125
Old Battle 9860 33.5 25.2 133 30.4 27.8 109
Sage Creek Basin 7850 21.9 11.9 184 18.2 10.8 169
Sandstone RS 8152 20.2 11.2 180 21.3 15.5 137
Whiskey Park 9020 33.3 22.8 146 30.3 23.4 129
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Basin Index (%) 148 132
UPPER GREEN RIVER
Big Sandy Opening 9080 12.3 10.8 114 12.3 10.5 117
Blind Bull Sum 8650 19.8 20.2 98 13.5 15.8 85
East Rim Divide 7930 9.5 9.5 100 9.0 9.6 94
Elkhart Park G.S. 9400 9.7 10.2 95 8.9 10.6 84
Gros Ventre Summit 8750 9.0 10.4 87 8.3 10.2 81
Gunsight Pass 9820 10.4 10.8 96 9.9 11.5 86
Indian Creek 9425 22.3 19.2 116 19.1 16.4 116
Kendall R.S. 7740 9.6 10.5 91 10.1 11.4 89
Larsen Creek 9000 9.2 10.0 92 11.9 11.0 108
Loomis Park 8240 12.4 13.4 93 12.6 14.4 88
New Fork Lake 8340 8.9 9.2 97 -M 9.0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 11.5 11.4 101 12.5 11.8 106
Spring Creek Divide 9000 21.4 20.4 105 -M 19.9 *
Triple Peak 8500 19.9 20.2 99 20.3 21.3 95
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Basin Index (%) 100 96
LOWER GREEN RIVER
Blacks Fork Jct 8869 10.9 7.0 156 11.6 9.8 118
Buck Pasture 9632 15.9 -M * 17.5 -M *
EF Blacks Fork GS 9360 11.8 9.8 120 9.1 9.1 100
Hams Fork 7840 12.3 9.8 126 11.4 9.1 125
Henrys Fork 10182 -M -M * 12.0 -M *
Hewinta 9500 10.8 8.6 126 12.9 10.8 119
Hickerson Park 9122 8.4 6.5 129 9.1 8.5 107
Hole-in-Rock 9168 7.1 5.9 120 8.7 8.0 109
Indian Creek 9425 22.3 19.2 116 19.1 16.4 116
Kelley R.S. 8180 16.8 12.4 135 17.3 14.0 124
Spirit Lk 10235 15.8 9.9 160 15.3 13.1 117
Steel Creek Park 10158 16.0 12.4 129 15.7 13.0 121
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Basin Index (%) 130 116
UPPER BEAR RIVER
Bear River RS 8777 11.6 7.8 149 13.0 9.4 138
Bug Lake 7987 23.2 15.5 150 18.8 15.0 125
Burts Miller Ranch 8000 7.8 5.7 137 11.6 6.0 193
Chalk Creek #1 9171 25.1 18.8 134 23.8 18.7 127
Giveout 6930 12.0 8.4 143 12.5 10.0 125
Hayden Fork 9130 17.0 12.4 137 21.5 16.6 130
Kelley R.S. 8180 16.8 12.4 135 17.3 14.0 124
Lily Lake 9133 13.1 10.5 125 14.2 12.8 111
Monte Cristo 8932 30.5 22.6 135 28.3 21.0 135
Salt River Summit 7640 15.8 11.2 141 15.1 13.0 116
Spring Creek Divide 9000 21.4 20.4 105 -M 19.9 *
Trial Lake 9992 27.1 18.4 147 26.6 18.4 145
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Basin Index (%) 135 131
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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.
