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 SUNDAY: MARCH 5 , 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 14.6 15.1 97 16.4 17.3 95
Blind Bull Sum 8650 19.6 19.7 99 13.1 15.4 85
Cottonwood Creek 7670 19.8 18.4 108 21.0 20.1 104
East Rim Divide 7930 9.4 9.4 100 9.0 9.6 94
Grand Targhee 9260 36.3 33.6 108 22.2 26.4 84
Granite Creek 6770 13.3 15.0 89 11.0 16.0 69
Grassy Lake 7265 28.2 26.8 105 31.6 29.0 109
Gros Ventre Summit 8750 9.3 10.0 93 8.5 10.0 85
Gunsight Pass 9820 10.3 10.6 97 10.0 11.2 89
Lewis Lake Divide 7850 29.0 25.0 116 30.6 27.0 113
Loomis Park 8240 12.4 13.2 94 12.5 14.0 89
Phillips Bench 8200 23.8 21.6 110 24.1 22.4 108
Salt River Summit 7640 15.5 10.9 142 14.7 12.8 115
Snake River Station 6920 16.6 14.9 111 19.0 18.0 106
Somsen Ranch 6800 15.6 11.0 142 16.7 13.8 121
Spring Creek Divide 9000 -M 19.8 * -M 19.6 *
Thumb Divide 7980 16.1 13.2 122 15.1 14.2 106
Togwotee Pass 9580 18.2 19.6 93 16.8 21.0 80
Triple Peak 8500 19.7 19.6 101 20.3 20.7 98
Two Ocean Plateau 9240 25.1 23.2 108 20.2 21.3 95
Willow Creek 8080 28.8 24.3 119 27.5 26.6 103
Younts Peak 8350 13.7 12.1 113 11.1 11.8 94
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Basin Index (%) 108 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 34.3 31.2 110 32.6 31.0 105
Canyon 7870 11.9 -M * 14.0 -M *
Madison Plateau 7750 22.7 18.2 125 23.2 20.2 115
West Yellowstone 6700 12.9 9.1 142 15.6 11.4 137
Whiskey Creek 6800 16.2 12.3 132 19.9 16.0 124
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Basin Index (%) 122 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 15.2 18.2 84 14.0 16.8 83
Canyon 7870 11.9 -M * 14.0 -M *
Evening Star 9200 22.0 22.3 99 23.8 24.2 98
Fisher Creek 9100 28.0 26.8 104 28.6 26.1 110
Monument Peak 8850 17.2 16.9 102 19.6 17.6 111
Northeast Entrance 7350 8.3 9.1 91 10.5 11.0 95
Parker Peak 9400 19.3 17.8 108 18.7 16.6 113
Sylvan Lake 8420 16.0 16.2 99 18.9 18.7 101
Thumb Divide 7980 16.1 13.2 122 15.1 14.2 106
Two Ocean Plateau 9240 25.1 23.2 108 20.2 21.3 95
White Mill 8700 20.3 20.0 102 19.2 18.8 102
Wolverine 7650 11.8 10.4 113 11.0 10.3 107
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Basin Index (%) 103 102
WIND RIVER
Burroughs Creek 8750 8.8 -M * 8.9 -M *
Castle Creek 8400 5.1 6.4 80 5.7 7.1 80
Cold Springs 9630 6.7 6.0 112 8.2 7.0 117
Deer Park 9700 18.4 10.5 175 18.9 13.2 143
Hobbs Park 10100 12.1 11.0 110 11.4 9.6 119
Kirwin 9550 7.9 8.7 91 9.9 9.4 105
Little Warm 9370 8.2 8.1 101 9.3 9.7 96
South Pass 9040 15.0 11.9 126 14.3 12.1 118
St. Lawrence Alt 8620 5.6 -M * 7.7 -M *
Togwotee Pass 9580 18.2 19.6 93 16.8 21.0 80
Townsend Creek 8700 9.2 7.2 128 10.1 8.2 123
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Basin Index (%) 113 108
BIGHORN BASIN
Bald Mtn. 9380 15.6 15.2 103 12.7 13.0 98
Bear Trap Meadow 8200 7.6 5.4 141 7.7 6.5 118
Bone Springs Div 9350 11.8 13.2 89 9.8 12.5 78
Grave Springs 8550 8.5 6.9 123 9.0 7.2 125
Kirwin 9550 7.9 8.7 91 9.9 9.4 105
Marquette 8760 6.1 5.4 113 6.7 7.0 96
Middle Powder 7760 9.6 8.0 120 8.3 7.6 109
Owl Creek 8975 5.8 4.5 129 6.3 4.8 131
Powder River Pass 9480 9.4 8.8 107 11.3 9.7 116
Shell Creek 9580 11.4 12.2 93 11.7 10.9 107
Timber Creek 7950 4.4 4.0 110 4.9 5.8 84
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Basin Index (%) 106 104
SHOSHONE RIVER
Blackwater 9780 16.7 17.9 93 17.0 17.8 96
Evening Star 9200 22.0 22.3 99 23.8 24.2 98
Marquette 8760 6.1 5.4 113 6.7 7.0 96
Sylvan Lake 8420 16.0 16.2 99 18.9 18.7 101
Sylvan Road 7120 9.4 10.2 92 12.7 14.3 89
Younts Peak 8350 13.7 12.1 113 11.1 11.8 94
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Basin Index (%) 100 96
POWDER RIVER
Bear Trap Meadow 8200 7.6 5.4 141 7.7 6.5 118
Cloud Peak Reservoir 9860 11.7 12.0 98 11.4 10.4 110
Grave Springs 8550 8.5 6.9 123 9.0 7.2 125
Hansen Sawmill 8360 6.9 5.4 128 7.1 6.2 115
Middle Powder 7760 9.6 8.0 120 8.3 7.6 109
Powder River Pass 9480 9.4 8.8 107 11.3 9.7 116
Soldier Park 8720 6.4 5.5 116 6.4 7.2 89
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Basin Index (%) 116 112
TONGUE RIVER
Big Goose 7990 8.3 6.2 134 9.0 8.0 112
Bone Springs Div 9350 11.8 13.2 89 9.8 12.5 78
Burgess Junction 7880 10.4 8.4 124 11.8 9.4 126
Dome Lake 8880 9.3 9.0 103 9.9 9.6 103
Little Goose 8870 9.1 7.6 120 9.9 9.4 105
Sucker Creek 8880 11.4 10.0 114 13.7 10.8 127
Tie Creek 6870 8.0 4.5 178 11.0 8.6 128
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Basin Index (%) 116 110
BELLE FOURCHE
Blind Park 6890 8.0 6.7 119 9.5 8.8 108
Cole Canyon 5910 7.6 4.8 158 8.8 7.4 119
North Rapid Creek 6130 6.8 6.0 113 7.4 7.4 100
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Basin Index (%) 128 109
CHEYENNE RIVER BASIN
Blind Park 6890 8.0 6.7 119 9.5 8.8 108
North Rapid Creek 6130 6.8 6.0 113 7.4 7.4 100
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Basin Index (%) 117 104
UPPER N. PLATTE
Arapaho Ridge 10976 20.0 17.6 114 19.3 17.7 109
Blackhall Mtn 9839 30.6 22.7 135 30.2 23.0 131
Cinnabar Park 9707 -M 17.3 * 19.9 19.8 101
Columbine 9167 23.4 19.7 119 21.6 19.5 111
Divide Peak 8730 23.2 15.9 146 22.9 17.4 132
Joe Wright 10158 19.3 16.9 114 21.4 21.0 102
Laprele Creek 8390 10.5 7.7 136 11.0 9.0 122
Med Bow 10512 32.8 -M * 28.9 -M *
Never Summer 10323 -M 16.3 * -M 14.0 *
North French Creek 10153 25.1 22.4 112 24.6 21.4 115
Old Battle 9860 32.7 25.0 131 29.4 27.4 107
Rawah 9069 12.0 9.4 128 13.2 12.8 103
Sage Creek Basin 7850 21.7 11.5 189 18.0 10.8 167
Sand Lake 10098 23.4 21.6 108 22.6 18.8 120
South Brush Creek 8495 12.9 10.1 128 12.2 11.0 111
Tower 10620 42.0 36.6 115 38.4 32.8 117
Webber Springs 9260 23.7 17.0 139 25.6 20.6 124
Whiskey Park 9020 32.7 22.3 147 29.7 22.6 131
Willow Creek Pass 9523 13.4 10.6 126 13.5 10.8 125
Zirkel 9338 26.3 24.2 109 28.3 26.0 109
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Basin Index (%) 126 117
SWEETWATER
Deer Park 9700 18.4 10.5 175 18.9 13.2 143
Larsen Creek 9000 8.9 9.6 93 11.6 11.0 105
South Pass 9040 15.0 11.9 126 14.3 12.1 118
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Basin Index (%) 132 123
LOWER N. PLATTE
Casper Mtn. 7920 11.9 10.2 117 11.7 10.3 114
Laprele Creek 8390 10.5 7.7 136 11.0 9.0 122
Reno Hill 8430 13.0 10.8 120 14.3 10.8 132
Windy Peak 7915 9.5 6.2 153 10.2 7.7 132
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Basin Index (%) 129 125
LARAMIE RIVER
Brooklyn Lake 10250 21.3 17.2 124 21.4 17.4 123
Cinnabar Park 9707 -M 17.3 * 19.9 19.8 101
Crow Creek 8335 4.6 6.0 77 7.3 8.1 90
Deadman Hill 10239 15.7 13.6 115 14.4 13.8 104
Rawah 9069 12.0 9.4 128 13.2 12.8 103
Roach 9740 15.4 12.5 123 17.2 14.8 116
Windy Peak 7915 9.5 6.2 153 10.2 7.7 132
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Basin Index (%) 121 110
S. PLATTE
Crow Creek 8335 4.6 6.0 77 7.3 8.1 90
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Basin Index (%) 77 90
LITTLE SNAKE RIVER
Battle Mountain 7498 14.9 10.6 141 18.8 12.4 152
Divide Peak 8730 23.2 15.9 146 22.9 17.4 132
Elk River 8739 23.3 15.9 147 22.3 15.6 143
Elkhead Divide 8800 25.9 -M * 25.2 -M *
Little Snake River 8928 30.8 22.4 138 33.3 27.2 122
Old Battle 9860 32.7 25.0 131 29.4 27.4 107
Sage Creek Basin 7850 21.7 11.5 189 18.0 10.8 167
Sandstone RS 8152 19.7 10.9 181 20.9 15.0 139
Whiskey Park 9020 32.7 22.3 147 29.7 22.6 131
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Basin Index (%) 148 132
UPPER GREEN RIVER
Big Sandy Opening 9080 12.0 10.8 111 12.1 10.4 116
Blind Bull Sum 8650 19.6 19.7 99 13.1 15.4 85
East Rim Divide 7930 9.4 9.4 100 9.0 9.6 94
Elkhart Park G.S. 9400 9.5 10.0 95 8.7 10.2 85
Gros Ventre Summit 8750 9.3 10.0 93 8.5 10.0 85
Gunsight Pass 9820 10.3 10.6 97 10.0 11.2 89
Indian Creek 9425 22.0 19.2 115 18.9 16.3 116
Kendall R.S. 7740 9.6 10.2 94 9.9 11.1 89
Larsen Creek 9000 8.9 9.6 93 11.6 11.0 105
Loomis Park 8240 12.4 13.2 94 12.5 14.0 89
New Fork Lake 8340 8.8 9.0 98 -M 8.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 11.4 11.0 104 12.5 11.4 110
Spring Creek Divide 9000 -M 19.8 * -M 19.6 *
Triple Peak 8500 19.7 19.6 101 20.3 20.7 98
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Basin Index (%) 100 97
LOWER GREEN RIVER
Blacks Fork Jct 8869 10.2 6.9 148 10.8 9.8 110
Buck Pasture 9632 15.0 -M * 16.6 -M *
EF Blacks Fork GS 9360 11.1 9.4 118 8.4 8.8 95
Hams Fork 7840 12.2 9.6 127 11.2 9.0 124
Henrys Fork 10182 -M -M * 11.4 -M *
Hewinta 9500 9.9 8.4 118 12.1 10.7 113
Hickerson Park 9122 7.8 6.4 122 8.6 8.3 104
Hole-in-Rock 9168 6.6 5.8 114 8.3 8.0 104
Indian Creek 9425 22.0 19.2 115 18.9 16.3 116
Kelley R.S. 8180 16.6 12.2 136 16.9 13.8 122
Spirit Lk 10235 15.2 9.3 163 14.8 12.8 116
Steel Creek Park 10158 15.0 12.2 123 14.7 13.0 113
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Basin Index (%) 127 113
UPPER BEAR RIVER
Bear River RS 8777 10.6 7.8 136 12.0 9.4 128
Bug Lake 7987 22.8 15.4 148 18.4 14.7 125
Burts Miller Ranch 8000 7.3 5.5 133 11.1 6.0 185
Chalk Creek #1 9171 23.8 18.4 129 22.5 18.3 123
Giveout 6930 11.8 8.4 140 12.2 10.0 122
Hayden Fork 9130 15.7 12.2 129 19.8 16.4 121
Kelley R.S. 8180 16.6 12.2 136 16.9 13.8 122
Lily Lake 9133 12.0 10.4 115 13.2 12.6 105
Monte Cristo 8932 29.6 21.7 136 27.0 20.6 131
Salt River Summit 7640 15.5 10.9 142 14.7 12.8 115
Spring Creek Divide 9000 -M 19.8 * -M 19.6 *
Trial Lake 9992 26.2 18.1 145 25.5 18.0 142
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Basin Index (%) 136 127
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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.
