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 28 , 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 18.0 16.2 111 19.3 19.4 99
Blind Bull Sum 8650 24.0 23.4 103 16.8 17.4 97
Cottonwood Creek 7670 24.1 20.9 115 -M 24.1 *
East Rim Divide 7930 11.8 10.5 112 11.1 10.6 105
Grand Targhee 9260 43.4 39.3 110 22.6 29.0 78
Granite Creek 6770 -M 15.3 * -M 17.2 *
Grassy Lake 7265 33.8 31.2 108 37.1 33.0 112
Gros Ventre Summit 8750 11.5 12.2 94 10.5 11.7 90
Gunsight Pass 9820 13.3 12.4 107 12.4 13.2 94
Lewis Lake Divide 7850 35.0 29.4 119 30.7 31.4 98
Loomis Park 8240 15.7 15.0 105 15.9 16.4 97
Phillips Bench 8200 28.7 25.4 113 -M 26.0 *
Salt River Summit 7640 18.6 12.8 145 17.7 14.8 120
Snake River Station 6920 19.4 16.6 117 21.7 20.9 104
Somsen Ranch 6800 19.5 11.9 164 20.4 15.4 132
Spring Creek Divide 9000 25.4 23.8 107 18.7 22.6 83
Thumb Divide 7980 19.7 15.6 126 18.1 16.6 109
Togwotee Pass 9580 21.8 22.7 96 20.1 23.6 85
Triple Peak 8500 23.3 22.3 104 23.5 24.4 96
Two Ocean Plateau 9240 29.9 27.6 108 20.9 24.8 84
Willow Creek 8080 35.1 28.6 123 33.7 31.0 109
Younts Peak 8350 15.8 13.9 114 12.8 13.8 93
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Basin Index (%) 113 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 43.8 36.4 120 40.3 34.4 117
Canyon 7870 14.2 -M * 16.4 -M *
Madison Plateau 7750 29.1 21.4 136 27.8 22.8 122
West Yellowstone 6700 16.3 10.4 157 18.8 13.2 142
Whiskey Creek 6800 20.6 14.4 143 25.0 18.4 136
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Basin Index (%) 133 126
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 18.2 20.8 88 17.0 19.0 89
Canyon 7870 14.2 -M * 16.4 -M *
Evening Star 9200 25.4 24.2 105 27.1 26.6 102
Fisher Creek 9100 33.0 30.8 107 33.4 31.0 108
Monument Peak 8850 21.2 19.3 110 23.6 20.1 117
Northeast Entrance 7350 10.0 9.6 104 12.1 12.4 98
Parker Peak 9400 23.1 20.0 116 22.3 19.1 117
Sylvan Lake 8420 19.9 18.8 106 22.4 21.4 105
Thumb Divide 7980 19.7 15.6 126 18.1 16.6 109
Two Ocean Plateau 9240 29.9 27.6 108 20.9 24.8 84
White Mill 8700 23.7 23.0 103 22.4 21.8 103
Wolverine 7650 13.2 10.9 121 12.4 11.7 106
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Basin Index (%) 108 103
WIND RIVER
Burroughs Creek 8750 10.6 -M * 10.4 -M *
Castle Creek 8400 6.3 6.8 93 6.8 8.0 85
Cold Springs 9630 7.6 7.0 109 9.0 8.2 110
Deer Park 9700 22.7 13.6 167 22.9 16.4 140
Hobbs Park 10100 14.7 13.0 113 13.7 11.6 118
Kirwin 9550 9.8 10.0 98 11.9 10.8 110
Little Warm 9370 10.2 9.9 103 11.5 11.3 102
South Pass 9040 18.2 14.2 128 17.6 14.4 122
St. Lawrence Alt 8620 7.1 -M * 9.2 -M *
Togwotee Pass 9580 21.8 22.7 96 20.1 23.6 85
Townsend Creek 8700 10.8 8.4 129 11.8 9.7 122
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Basin Index (%) 116 110
BIGHORN BASIN
Bald Mtn. 9380 17.6 17.2 102 14.4 15.2 95
Bear Trap Meadow 8200 8.9 6.1 146 8.9 7.4 120
Bone Springs Div 9350 14.3 15.4 93 11.5 14.1 82
Grave Springs 8550 9.5 7.9 120 9.9 8.8 112
Kirwin 9550 9.8 10.0 98 11.9 10.8 110
Marquette 8760 8.2 6.6 124 8.9 8.1 110
Middle Powder 7760 11.0 9.9 111 9.3 9.2 101
Owl Creek 8975 7.3 5.1 143 7.8 5.4 144
Powder River Pass 9480 10.9 10.4 105 12.9 11.7 110
Shell Creek 9580 13.2 14.2 93 13.5 12.9 105
Timber Creek 7950 6.0 3.9 154 6.6 7.0 94
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Basin Index (%) 109 105
SHOSHONE RIVER
Blackwater 9780 20.0 21.1 95 20.0 20.6 97
Evening Star 9200 25.4 24.2 105 27.1 26.6 102
Marquette 8760 8.2 6.6 124 8.9 8.1 110
Sylvan Lake 8420 19.9 18.8 106 22.4 21.4 105
Sylvan Road 7120 11.2 11.0 102 14.3 15.3 93
Younts Peak 8350 15.8 13.9 114 12.8 13.8 93
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Basin Index (%) 105 100
POWDER RIVER
Bear Trap Meadow 8200 8.9 6.1 146 8.9 7.4 120
Cloud Peak Reservoir 9860 14.1 13.6 104 13.6 12.0 113
Grave Springs 8550 9.5 7.9 120 9.9 8.8 112
Hansen Sawmill 8360 8.3 6.0 138 8.5 7.8 109
Middle Powder 7760 11.0 9.9 111 9.3 9.2 101
Powder River Pass 9480 10.9 10.4 105 12.9 11.7 110
Soldier Park 8720 8.6 6.6 130 8.0 8.4 95
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Basin Index (%) 118 109
TONGUE RIVER
Big Goose 7990 9.6 7.7 125 10.2 9.0 113
Bone Springs Div 9350 14.3 15.4 93 11.5 14.1 82
Burgess Junction 7880 11.9 9.8 121 13.2 10.6 125
Dome Lake 8880 10.8 10.7 101 11.0 11.6 95
Little Goose 8870 10.8 9.2 117 11.4 11.0 104
Sucker Creek 8880 13.2 11.1 119 15.7 12.4 127
Tie Creek 6870 9.0 4.6 196 12.2 9.6 127
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Basin Index (%) 116 109
BELLE FOURCHE
Blind Park 6890 8.9 7.0 127 10.6 10.4 102
Cole Canyon 5910 8.3 5.4 154 9.4 8.1 116
North Rapid Creek 6130 7.5 6.6 114 8.4 8.3 101
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Basin Index (%) 130 106
CHEYENNE RIVER BASIN
Blind Park 6890 8.9 7.0 127 10.6 10.4 102
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 24.7 20.4 121 23.6 20.4 116
Blackhall Mtn 9839 37.0 28.8 128 35.8 27.6 130
Cinnabar Park 9707 -M 19.4 * 22.3 22.3 100
Columbine 9167 28.0 21.5 130 24.8 22.6 110
Divide Peak 8730 27.7 18.4 151 27.7 20.6 134
Joe Wright 10158 24.2 19.4 125 26.1 24.4 107
Laprele Creek 8390 11.5 9.2 125 11.8 10.8 109
Med Bow 10512 38.3 -M * 31.1 -M *
Never Summer 10323 25.0 18.9 132 17.6 16.0 110
North French Creek 10153 29.2 26.4 111 28.2 24.3 116
Old Battle 9860 40.1 28.2 142 30.8 31.1 99
Rawah 9069 15.0 10.4 144 16.4 14.4 114
Sage Creek Basin 7850 25.1 12.5 201 20.2 12.2 166
Sand Lake 10098 27.2 25.2 108 25.8 23.0 112
South Brush Creek 8495 15.3 11.4 134 14.0 12.7 110
Tower 10620 49.5 40.6 122 -M 37.6 *
Webber Springs 9260 29.3 21.1 139 30.6 24.0 128
Whiskey Park 9020 38.2 25.3 151 34.2 26.0 132
Willow Creek Pass 9523 17.3 12.2 142 16.7 12.8 130
Zirkel 9338 31.9 27.2 117 33.0 29.4 112
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Basin Index (%) 132 117
SWEETWATER
Deer Park 9700 22.7 13.6 167 22.9 16.4 140
Larsen Creek 9000 11.3 10.6 107 13.9 12.4 112
South Pass 9040 18.2 14.2 128 17.6 14.4 122
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Basin Index (%) 136 126
LOWER N. PLATTE
Casper Mtn. 7920 12.9 12.4 104 12.6 12.6 100
Laprele Creek 8390 11.5 9.2 125 11.8 10.8 109
Reno Hill 8430 14.0 12.8 109 15.2 13.0 117
Windy Peak 7915 10.4 7.8 133 11.1 9.2 121
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Basin Index (%) 116 111
LARAMIE RIVER
Brooklyn Lake 10250 24.2 20.2 120 24.0 20.4 118
Cinnabar Park 9707 -M 19.4 * 22.3 22.3 100
Crow Creek 8335 5.3 5.7 93 8.4 9.9 85
Deadman Hill 10239 18.5 15.5 119 17.2 16.5 104
Rawah 9069 15.0 10.4 144 16.4 14.4 114
Roach 9740 17.9 14.8 121 20.0 17.3 116
Windy Peak 7915 10.4 7.8 133 11.1 9.2 121
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Basin Index (%) 123 109
S. PLATTE
Crow Creek 8335 5.3 5.7 93 8.4 9.9 85
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Basin Index (%) 93 85
LITTLE SNAKE RIVER
Battle Mountain 7498 17.7 11.0 161 21.5 14.1 152
Divide Peak 8730 27.7 18.4 151 27.7 20.6 134
Elk River 8739 28.5 17.5 163 25.4 17.6 144
Elkhead Divide 8800 31.9 -M * -M -M *
Little Snake River 8928 38.2 25.0 153 37.1 30.2 123
Old Battle 9860 40.1 28.2 142 30.8 31.1 99
Sage Creek Basin 7850 25.1 12.5 201 20.2 12.2 166
Sandstone RS 8152 -M 12.4 * 24.5 16.9 145
Whiskey Park 9020 38.2 25.3 151 34.2 26.0 132
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Basin Index (%) 156 131
UPPER GREEN RIVER
Big Sandy Opening 9080 14.4 12.7 113 14.5 12.0 121
Blind Bull Sum 8650 24.0 23.4 103 16.8 17.4 97
East Rim Divide 7930 11.8 10.5 112 11.1 10.6 105
Elkhart Park G.S. 9400 11.7 12.0 98 11.0 12.1 91
Gros Ventre Summit 8750 11.5 12.2 94 10.5 11.7 90
Gunsight Pass 9820 13.3 12.4 107 12.4 13.2 94
Indian Creek 9425 26.4 22.2 119 22.3 18.4 121
Kendall R.S. 7740 12.2 11.2 109 12.4 12.7 98
Larsen Creek 9000 11.3 10.6 107 13.9 12.4 112
Loomis Park 8240 15.7 15.0 105 15.9 16.4 97
New Fork Lake 8340 10.9 10.2 107 -M 10.0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.0 12.2 115 14.7 13.4 110
Spring Creek Divide 9000 25.4 23.8 107 18.7 22.6 83
Triple Peak 8500 23.3 22.3 104 23.5 24.4 96
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Basin Index (%) 107 100
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.8 8.4 152 13.5 11.4 118
Buck Pasture 9632 19.5 -M * 20.1 -M *
EF Blacks Fork GS 9360 13.5 11.1 122 10.7 10.1 106
Hams Fork 7840 15.0 10.6 142 13.4 10.4 129
Henrys Fork 10182 -M -M * 14.0 -M *
Hewinta 9500 12.7 9.8 130 15.0 12.2 123
Hickerson Park 9122 10.0 7.3 137 10.6 9.3 114
Hole-in-Rock 9168 8.9 7.0 127 10.0 9.0 111
Indian Creek 9425 26.4 22.2 119 22.3 18.4 121
Kelley R.S. 8180 19.3 14.2 136 19.7 15.2 130
Spirit Lk 10235 -M 11.8 * 18.5 15.6 119
Steel Creek Park 10158 18.6 13.6 137 18.3 15.0 122
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Basin Index (%) 132 120
UPPER BEAR RIVER
Bear River RS 8777 13.9 8.9 156 15.0 11.1 135
Bug Lake 7987 27.6 17.8 155 22.7 16.8 135
Burts Miller Ranch 8000 9.9 5.6 177 13.1 7.1 185
Chalk Creek #1 9171 31.3 22.0 142 29.2 21.6 135
Giveout 6930 14.7 8.0 184 14.7 11.2 131
Hayden Fork 9130 22.4 14.3 157 25.7 19.3 133
Kelley R.S. 8180 19.3 14.2 136 19.7 15.2 130
Lily Lake 9133 15.5 12.0 129 16.5 14.2 116
Monte Cristo 8932 38.4 25.3 152 35.0 24.3 144
Salt River Summit 7640 18.6 12.8 145 17.7 14.8 120
Spring Creek Divide 9000 25.4 23.8 107 18.7 22.6 83
Trial Lake 9992 34.7 20.9 166 33.1 21.0 158
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Basin Index (%) 146 131
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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.
