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 WEDNESDAY: MARCH 29 , 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 18.1 16.3 111 19.4 19.5 99
Blind Bull Sum 8650 24.3 23.6 103 16.8 17.4 97
Cottonwood Creek 7670 24.1 21.1 114 23.2 24.2 96
East Rim Divide 7930 11.9 10.2 117 11.3 10.7 106
Grand Targhee 9260 43.5 39.6 110 22.8 29.4 78
Granite Creek 6770 18.4 15.4 119 15.2 17.2 88
Grassy Lake 7265 33.8 31.3 108 37.2 33.2 112
Gros Ventre Summit 8750 11.7 12.3 95 10.7 11.8 91
Gunsight Pass 9820 13.4 12.5 107 12.6 13.2 95
Lewis Lake Divide 7850 35.2 29.6 119 30.7 31.6 97
Loomis Park 8240 15.8 15.0 105 15.9 16.4 97
Phillips Bench 8200 28.9 25.6 113 -M 26.0 *
Salt River Summit 7640 18.9 13.0 145 17.8 14.9 119
Snake River Station 6920 19.6 16.5 119 21.8 21.2 103
Somsen Ranch 6800 19.4 11.8 164 20.6 16.0 129
Spring Creek Divide 9000 25.7 23.9 108 18.8 22.6 83
Thumb Divide 7980 19.8 15.6 127 18.2 16.7 109
Togwotee Pass 9580 21.8 22.8 96 20.2 23.8 85
Triple Peak 8500 23.4 22.2 105 23.7 24.4 97
Two Ocean Plateau 9240 30.1 27.8 108 21.0 25.2 83
Willow Creek 8080 35.4 28.8 123 33.8 31.2 108
Younts Peak 8350 15.9 14.1 113 12.8 14.1 91
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Basin Index (%) 113 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 43.9 36.8 119 40.3 34.7 116
Canyon 7870 14.3 -M * 16.5 -M *
Madison Plateau 7750 29.2 21.5 136 27.9 23.0 121
West Yellowstone 6700 16.4 10.2 161 18.8 13.4 140
Whiskey Creek 6800 20.7 15.0 138 25.2 18.7 135
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Basin Index (%) 132 125
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 18.4 21.0 88 17.1 19.2 89
Canyon 7870 14.3 -M * 16.5 -M *
Evening Star 9200 25.6 24.2 106 27.3 26.7 102
Fisher Creek 9100 33.2 31.0 107 33.7 31.2 108
Monument Peak 8850 21.5 19.4 111 23.9 20.2 118
Northeast Entrance 7350 10.1 9.6 105 12.2 12.4 98
Parker Peak 9400 23.3 20.0 116 22.5 19.1 118
Sylvan Lake 8420 20.0 19.0 105 23.0 21.6 106
Thumb Divide 7980 19.8 15.6 127 18.2 16.7 109
Two Ocean Plateau 9240 30.1 27.8 108 21.0 25.2 83
White Mill 8700 23.9 23.2 103 22.6 21.8 104
Wolverine 7650 13.4 10.9 123 12.6 11.8 107
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Basin Index (%) 108 104
WIND RIVER
Burroughs Creek 8750 10.7 -M * 10.4 -M *
Castle Creek 8400 6.4 6.7 96 7.0 8.2 85
Cold Springs 9630 7.5 7.2 104 9.1 8.2 111
Deer Park 9700 22.7 14.0 162 23.0 16.5 139
Hobbs Park 10100 14.8 13.2 112 13.8 12.0 115
Kirwin 9550 9.8 10.0 98 11.9 11.0 108
Little Warm 9370 10.2 10.0 102 11.6 11.4 102
South Pass 9040 18.2 14.3 127 17.8 14.7 121
St. Lawrence Alt 8620 7.1 -M * 9.3 -M *
Togwotee Pass 9580 21.8 22.8 96 20.2 23.8 85
Townsend Creek 8700 10.9 8.6 127 11.9 10.0 119
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Basin Index (%) 115 109
BIGHORN BASIN
Bald Mtn. 9380 17.8 17.8 100 14.6 15.3 95
Bear Trap Meadow 8200 9.0 6.0 150 9.0 7.5 120
Bone Springs Div 9350 14.6 16.0 91 11.7 14.6 80
Grave Springs 8550 9.6 8.0 120 10.0 8.8 114
Kirwin 9550 9.8 10.0 98 11.9 11.0 108
Marquette 8760 8.3 6.8 122 9.0 8.2 110
Middle Powder 7760 11.1 10.1 110 9.3 9.2 101
Owl Creek 8975 7.4 5.2 142 7.8 5.8 134
Powder River Pass 9480 10.9 10.4 105 13.1 11.8 111
Shell Creek 9580 13.5 14.4 94 13.6 13.0 105
Timber Creek 7950 6.0 4.2 143 6.6 7.5 88
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Basin Index (%) 108 103
SHOSHONE RIVER
Blackwater 9780 20.1 21.4 94 20.3 20.6 99
Evening Star 9200 25.6 24.2 106 27.3 26.7 102
Marquette 8760 8.3 6.8 122 9.0 8.2 110
Sylvan Lake 8420 20.0 19.0 105 23.0 21.6 106
Sylvan Road 7120 11.0 10.9 101 14.3 15.4 93
Younts Peak 8350 15.9 14.1 113 12.8 14.1 91
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Basin Index (%) 105 100
POWDER RIVER
Bear Trap Meadow 8200 9.0 6.0 150 9.0 7.5 120
Cloud Peak Reservoir 9860 14.2 14.0 101 13.7 12.4 110
Grave Springs 8550 9.6 8.0 120 10.0 8.8 114
Hansen Sawmill 8360 8.4 6.0 140 8.5 7.8 109
Middle Powder 7760 11.1 10.1 110 9.3 9.2 101
Powder River Pass 9480 10.9 10.4 105 13.1 11.8 111
Soldier Park 8720 8.6 6.8 126 8.0 8.6 93
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Basin Index (%) 117 108
TONGUE RIVER
Big Goose 7990 9.7 7.8 124 10.2 9.3 110
Bone Springs Div 9350 14.6 16.0 91 11.7 14.6 80
Burgess Junction 7880 12.0 9.8 122 13.4 10.8 124
Dome Lake 8880 11.0 10.8 102 11.1 11.8 94
Little Goose 8870 10.8 9.2 117 11.5 11.2 103
Sucker Creek 8880 13.4 11.4 118 15.8 12.7 124
Tie Creek 6870 9.1 4.7 194 12.3 9.9 124
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Basin Index (%) 116 107
BELLE FOURCHE
Blind Park 6890 8.9 7.0 127 10.7 10.4 103
Cole Canyon 5910 8.4 5.4 156 9.6 8.1 119
North Rapid Creek 6130 7.5 6.6 114 8.4 8.3 101
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Basin Index (%) 131 107
CHEYENNE RIVER BASIN
Blind Park 6890 8.9 7.0 127 10.7 10.4 103
North Rapid Creek 6130 7.5 6.6 114 8.4 8.3 101
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Basin Index (%) 121 102
UPPER N. PLATTE
Arapaho Ridge 10976 24.8 20.5 121 23.7 20.6 115
Blackhall Mtn 9839 37.2 28.9 129 36.0 27.8 129
Cinnabar Park 9707 -M 19.4 * 22.4 22.3 100
Columbine 9167 28.4 21.8 130 25.3 22.9 110
Divide Peak 8730 27.9 18.4 152 27.8 20.6 135
Joe Wright 10158 24.5 19.5 126 26.2 24.6 107
Laprele Creek 8390 11.6 9.2 126 12.0 11.0 109
Med Bow 10512 38.6 -M * 31.2 -M *
Never Summer 10323 24.8 19.1 130 17.8 16.2 110
North French Creek 10153 29.6 26.5 112 28.3 24.8 114
Old Battle 9860 40.2 28.3 142 30.9 31.1 99
Rawah 9069 15.2 10.4 146 16.4 14.6 112
Sage Creek Basin 7850 25.3 12.5 202 20.3 12.3 165
Sand Lake 10098 -M 25.3 * -M 23.0 *
South Brush Creek 8495 15.6 11.4 137 14.1 12.7 111
Tower 10620 49.6 41.2 120 -M 37.6 *
Webber Springs 9260 29.3 21.2 138 30.8 24.2 127
Whiskey Park 9020 38.7 25.4 152 34.2 26.2 131
Willow Creek Pass 9523 17.4 12.4 140 16.9 13.0 130
Zirkel 9338 32.2 27.2 118 33.4 29.4 114
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Basin Index (%) 133 118
SWEETWATER
Deer Park 9700 22.7 14.0 162 23.0 16.5 139
Larsen Creek 9000 11.5 10.6 108 14.0 12.7 110
South Pass 9040 18.2 14.3 127 17.8 14.7 121
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Basin Index (%) 135 125
LOWER N. PLATTE
Casper Mtn. 7920 12.9 12.4 104 12.6 12.6 100
Laprele Creek 8390 11.6 9.2 126 12.0 11.0 109
Reno Hill 8430 14.2 12.9 110 15.4 14.0 110
Windy Peak 7915 10.7 7.8 137 11.3 9.3 122
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Basin Index (%) 117 109
LARAMIE RIVER
Brooklyn Lake 10250 24.3 20.2 120 24.2 20.4 119
Cinnabar Park 9707 -M 19.4 * 22.4 22.3 100
Crow Creek 8335 5.5 5.7 96 8.6 9.9 87
Deadman Hill 10239 18.8 15.6 121 17.4 16.5 105
Rawah 9069 15.2 10.4 146 16.4 14.6 112
Roach 9740 18.1 14.8 122 20.1 17.9 112
Windy Peak 7915 10.7 7.8 137 11.3 9.3 122
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Basin Index (%) 124 109
S. PLATTE
Crow Creek 8335 5.5 5.7 96 8.6 9.9 87
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Basin Index (%) 96 87
LITTLE SNAKE RIVER
Battle Mountain 7498 18.1 11.0 165 21.8 14.3 152
Divide Peak 8730 27.9 18.4 152 27.8 20.6 135
Elk River 8739 28.8 17.6 164 25.5 17.8 143
Elkhead Divide 8800 32.3 -M * -M -M *
Little Snake River 8928 38.3 25.3 151 37.2 30.4 122
Old Battle 9860 40.2 28.3 142 30.9 31.1 99
Sage Creek Basin 7850 25.3 12.5 202 20.3 12.3 165
Sandstone RS 8152 -M 12.4 * 24.6 17.0 145
Whiskey Park 9020 38.7 25.4 152 34.2 26.2 131
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Basin Index (%) 157 131
UPPER GREEN RIVER
Big Sandy Opening 9080 14.6 12.7 115 14.7 12.1 121
Blind Bull Sum 8650 24.3 23.6 103 16.8 17.4 97
East Rim Divide 7930 11.9 10.2 117 11.3 10.7 106
Elkhart Park G.S. 9400 11.9 12.0 99 11.1 12.2 91
Gros Ventre Summit 8750 11.7 12.3 95 10.7 11.8 91
Gunsight Pass 9820 13.4 12.5 107 12.6 13.2 95
Indian Creek 9425 26.7 22.3 120 22.5 18.6 121
Kendall R.S. 7740 12.4 11.2 111 12.5 12.8 98
Larsen Creek 9000 11.5 10.6 108 14.0 12.7 110
Loomis Park 8240 15.8 15.0 105 15.9 16.4 97
New Fork Lake 8340 10.9 10.2 107 -M 10.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.1 12.4 114 14.8 13.4 110
Spring Creek Divide 9000 25.7 23.9 108 18.8 22.6 83
Triple Peak 8500 23.4 22.2 105 23.7 24.4 97
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Basin Index (%) 108 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.9 8.5 152 13.6 11.5 118
Buck Pasture 9632 19.6 -M * 20.1 -M *
EF Blacks Fork GS 9360 13.7 11.1 123 10.5 10.1 104
Hams Fork 7840 15.2 10.6 143 13.5 10.6 127
Henrys Fork 10182 -M -M * 13.8 -M *
Hewinta 9500 12.9 10.0 129 15.0 12.3 122
Hickerson Park 9122 10.1 7.4 136 10.6 9.5 112
Hole-in-Rock 9168 9.0 6.8 132 10.3 9.2 112
Indian Creek 9425 26.7 22.3 120 22.5 18.6 121
Kelley R.S. 8180 19.6 14.3 137 19.9 15.4 129
Spirit Lk 10235 19.9 11.8 169 18.6 15.6 119
Steel Creek Park 10158 18.6 13.8 135 18.3 15.2 120
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Basin Index (%) 136 119
UPPER BEAR RIVER
Bear River RS 8777 13.9 9.1 153 15.0 11.2 134
Bug Lake 7987 27.6 17.9 154 22.7 17.0 134
Burts Miller Ranch 8000 10.1 5.4 187 13.4 7.1 189
Chalk Creek #1 9171 31.4 22.0 143 -M 21.8 *
Giveout 6930 14.9 8.2 182 14.7 11.2 131
Hayden Fork 9130 22.6 14.4 157 25.0 19.4 129
Kelley R.S. 8180 19.6 14.3 137 19.9 15.4 129
Lily Lake 9133 15.0 12.0 125 16.4 14.3 115
Monte Cristo 8932 38.5 25.4 152 35.1 24.4 144
Salt River Summit 7640 18.9 13.0 145 17.8 14.9 119
Spring Creek Divide 9000 25.7 23.9 108 18.8 22.6 83
Trial Lake 9992 34.9 21.3 164 33.2 21.2 157
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Basin Index (%) 146 130
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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.
