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 SATURDAY: MARCH 25 , 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 17.4 16.0 109 18.7 19.0 98
Blind Bull Sum 8650 23.8 22.7 105 16.6 17.1 97
Cottonwood Creek 7670 23.5 20.8 113 23.0 23.8 97
East Rim Divide 7930 11.8 10.3 115 11.2 10.5 107
Grand Targhee 9260 41.4 38.4 108 22.6 28.6 79
Granite Creek 6770 -M 15.4 * -M 17.0 *
Grassy Lake 7265 33.0 30.8 107 35.8 32.6 110
Gros Ventre Summit 8750 11.6 11.6 100 10.3 11.4 90
Gunsight Pass 9820 12.8 12.2 105 12.0 12.8 94
Lewis Lake Divide 7850 34.5 29.2 118 -M 30.4 *
Loomis Park 8240 15.6 14.5 108 15.7 15.8 99
Phillips Bench 8200 28.5 23.8 120 25.8 25.2 102
Salt River Summit 7640 18.5 13.0 142 17.6 14.6 121
Snake River Station 6920 19.2 16.6 116 21.5 20.2 106
Somsen Ranch 6800 19.3 11.8 164 20.1 15.2 132
Spring Creek Divide 9000 25.2 23.6 107 18.3 22.2 82
Thumb Divide 7980 19.4 15.2 128 17.9 16.1 111
Togwotee Pass 9580 21.0 22.2 95 19.1 23.2 82
Triple Peak 8500 23.2 22.0 105 23.6 24.0 98
Two Ocean Plateau 9240 29.3 27.1 108 21.1 24.2 87
Willow Creek 8080 34.6 27.8 124 33.1 30.5 109
Younts Peak 8350 15.8 13.8 114 12.8 13.5 95
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Basin Index (%) 113 99
MADISON HEADWATERS IN WYOMING
Black Bear 8170 42.2 35.9 118 38.8 34.0 114
Canyon 7870 13.6 -M * 15.9 -M *
Madison Plateau 7750 28.5 21.0 136 27.1 22.4 121
West Yellowstone 6700 16.1 10.1 159 18.5 13.2 140
Whiskey Creek 6800 20.3 14.4 141 24.5 18.2 135
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Basin Index (%) 132 124
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 17.6 20.6 85 16.2 18.8 86
Canyon 7870 13.6 -M * 15.9 -M *
Evening Star 9200 24.8 24.0 103 26.5 26.6 100
Fisher Creek 9100 32.7 30.6 107 33.1 30.4 109
Monument Peak 8850 20.5 19.2 107 22.8 19.6 116
Northeast Entrance 7350 9.8 9.6 102 11.8 12.1 98
Parker Peak 9400 21.8 19.6 111 21.3 18.6 115
Sylvan Lake 8420 18.9 18.6 102 21.8 21.2 103
Thumb Divide 7980 19.4 15.2 128 17.9 16.1 111
Two Ocean Plateau 9240 29.3 27.1 108 21.1 24.2 87
White Mill 8700 23.4 22.1 106 22.1 21.2 104
Wolverine 7650 12.7 10.8 118 11.9 11.5 103
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Basin Index (%) 106 103
WIND RIVER
Burroughs Creek 8750 10.5 -M * 10.2 -M *
Castle Creek 8400 6.0 6.9 87 6.6 7.9 84
Cold Springs 9630 7.6 6.8 112 8.9 8.2 109
Deer Park 9700 22.2 13.2 168 22.4 16.3 137
Hobbs Park 10100 14.1 12.8 110 13.1 11.2 117
Kirwin 9550 9.6 10.0 96 11.7 10.5 111
Little Warm 9370 9.8 9.4 104 11.1 11.2 99
South Pass 9040 17.8 13.4 133 17.4 14.0 124
St. Lawrence Alt 8620 6.8 -M * 9.0 -M *
Togwotee Pass 9580 21.0 22.2 95 19.1 23.2 82
Townsend Creek 8700 10.5 8.2 128 11.5 9.4 122
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Basin Index (%) 115 109
BIGHORN BASIN
Bald Mtn. 9380 17.3 16.8 103 14.1 14.9 95
Bear Trap Meadow 8200 8.5 5.8 147 8.6 7.4 116
Bone Springs Div 9350 14.1 15.1 93 11.3 13.7 82
Grave Springs 8550 9.4 7.8 121 9.7 8.6 113
Kirwin 9550 9.6 10.0 96 11.7 10.5 111
Marquette 8760 7.2 6.6 109 7.9 8.0 99
Middle Powder 7760 10.7 9.8 109 9.1 9.0 101
Owl Creek 8975 6.7 5.0 134 7.3 5.3 138
Powder River Pass 9480 10.4 10.2 102 12.5 11.6 108
Shell Creek 9580 13.0 14.0 93 13.1 12.4 106
Timber Creek 7950 5.5 4.0 138 6.1 6.6 92
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Basin Index (%) 107 103
SHOSHONE RIVER
Blackwater 9780 19.5 20.9 93 19.7 20.2 98
Evening Star 9200 24.8 24.0 103 26.5 26.6 100
Marquette 8760 7.2 6.6 109 7.9 8.0 99
Sylvan Lake 8420 18.9 18.6 102 21.8 21.2 103
Sylvan Road 7120 10.5 11.4 92 14.2 15.2 93
Younts Peak 8350 15.8 13.8 114 12.8 13.5 95
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Basin Index (%) 101 98
POWDER RIVER
Bear Trap Meadow 8200 8.5 5.8 147 8.6 7.4 116
Cloud Peak Reservoir 9860 13.4 13.6 99 13.0 11.8 110
Grave Springs 8550 9.4 7.8 121 9.7 8.6 113
Hansen Sawmill 8360 7.8 6.0 130 8.0 7.8 103
Middle Powder 7760 10.7 9.8 109 9.1 9.0 101
Powder River Pass 9480 10.4 10.2 102 12.5 11.6 108
Soldier Park 8720 8.0 6.1 131 7.5 8.0 94
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Basin Index (%) 115 107
TONGUE RIVER
Big Goose 7990 9.1 7.4 123 9.7 9.0 108
Bone Springs Div 9350 14.1 15.1 93 11.3 13.7 82
Burgess Junction 7880 11.6 9.8 118 12.9 10.4 124
Dome Lake 8880 10.5 10.6 99 10.5 11.3 93
Little Goose 8870 9.9 8.4 118 10.7 10.5 102
Sucker Creek 8880 12.7 11.1 114 15.2 12.4 123
Tie Creek 6870 8.8 4.6 191 12.0 9.4 128
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Basin Index (%) 114 107
BELLE FOURCHE
Blind Park 6890 8.9 7.0 127 10.5 9.9 106
Cole Canyon 5910 8.4 5.2 162 9.6 7.9 122
North Rapid Creek 6130 7.6 6.6 115 8.3 8.1 102
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Basin Index (%) 132 110
CHEYENNE RIVER BASIN
Blind Park 6890 8.9 7.0 127 10.5 9.9 106
North Rapid Creek 6130 7.6 6.6 115 8.3 8.1 102
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Basin Index (%) 121 104
UPPER N. PLATTE
Arapaho Ridge 10976 24.6 19.9 124 23.4 19.7 119
Blackhall Mtn 9839 36.9 28.4 130 35.8 26.9 133
Cinnabar Park 9707 -M 19.2 * 22.3 21.7 103
Columbine 9167 27.8 21.7 128 24.7 22.2 111
Divide Peak 8730 27.3 18.2 150 27.3 20.2 135
Joe Wright 10158 24.1 19.0 127 25.8 24.0 108
Laprele Creek 8390 11.4 9.0 127 11.9 10.6 112
Med Bow 10512 38.2 -M * 31.1 -M *
Never Summer 10323 24.6 18.6 132 17.6 15.8 111
North French Creek 10153 29.4 26.2 112 28.3 24.2 117
Old Battle 9860 39.9 27.9 143 31.0 30.9 100
Rawah 9069 15.0 10.1 149 16.3 14.2 115
Sage Creek Basin 7850 24.6 12.1 203 19.9 11.8 169
Sand Lake 10098 27.1 24.6 110 25.8 22.8 113
South Brush Creek 8495 15.5 11.4 136 14.1 12.6 112
Tower 10620 49.2 39.4 125 -M 36.6 *
Webber Springs 9260 29.2 20.7 141 30.6 23.6 130
Whiskey Park 9020 38.1 24.8 154 34.0 25.4 134
Willow Creek Pass 9523 17.1 12.0 142 16.7 12.7 131
Zirkel 9338 31.8 26.5 120 32.9 28.4 116
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Basin Index (%) 133 119
SWEETWATER
Deer Park 9700 22.2 13.2 168 22.4 16.3 137
Larsen Creek 9000 11.1 10.6 105 13.7 12.0 114
South Pass 9040 17.8 13.4 133 17.4 14.0 124
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Basin Index (%) 137 126
LOWER N. PLATTE
Casper Mtn. 7920 12.8 12.0 107 12.5 12.5 100
Laprele Creek 8390 11.4 9.0 127 11.9 10.6 112
Reno Hill 8430 14.1 12.6 112 15.3 12.7 120
Windy Peak 7915 10.4 7.6 137 11.1 9.0 123
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Basin Index (%) 118 113
LARAMIE RIVER
Brooklyn Lake 10250 24.1 19.8 122 24.0 19.6 122
Cinnabar Park 9707 -M 19.2 * 22.3 21.7 103
Crow Creek 8335 5.4 6.2 87 8.4 9.8 86
Deadman Hill 10239 18.6 15.2 122 17.1 16.1 106
Rawah 9069 15.0 10.1 149 16.3 14.2 115
Roach 9740 17.9 14.3 125 20.0 17.0 118
Windy Peak 7915 10.4 7.6 137 11.1 9.0 123
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Basin Index (%) 125 111
S. PLATTE
Crow Creek 8335 5.4 6.2 87 8.4 9.8 86
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Basin Index (%) 87 86
LITTLE SNAKE RIVER
Battle Mountain 7498 18.0 11.0 164 21.6 13.8 157
Divide Peak 8730 27.3 18.2 150 27.3 20.2 135
Elk River 8739 28.4 17.0 167 25.3 17.4 145
Elkhead Divide 8800 31.8 -M * -M -M *
Little Snake River 8928 37.9 24.8 153 37.2 29.6 126
Old Battle 9860 39.9 27.9 143 31.0 30.9 100
Sage Creek Basin 7850 24.6 12.1 203 19.9 11.8 169
Sandstone RS 8152 -M 11.8 * 24.4 16.6 147
Whiskey Park 9020 38.1 24.8 154 34.0 25.4 134
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Basin Index (%) 158 133
UPPER GREEN RIVER
Big Sandy Opening 9080 14.4 12.4 116 14.4 11.9 121
Blind Bull Sum 8650 23.8 22.7 105 16.6 17.1 97
East Rim Divide 7930 11.8 10.3 115 11.2 10.5 107
Elkhart Park G.S. 9400 11.6 11.8 98 10.9 11.8 92
Gros Ventre Summit 8750 11.6 11.6 100 10.3 11.4 90
Gunsight Pass 9820 12.8 12.2 105 12.0 12.8 94
Indian Creek 9425 26.2 21.3 123 22.1 18.1 122
Kendall R.S. 7740 12.2 11.3 108 12.3 12.4 99
Larsen Creek 9000 11.1 10.6 105 13.7 12.0 114
Loomis Park 8240 15.6 14.5 108 15.7 15.8 99
New Fork Lake 8340 10.7 10.0 107 -M 9.9 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 13.9 12.4 112 14.5 13.0 112
Spring Creek Divide 9000 25.2 23.6 107 18.3 22.2 82
Triple Peak 8500 23.2 22.0 105 23.6 24.0 98
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Basin Index (%) 108 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.7 7.8 163 13.2 11.2 118
Buck Pasture 9632 19.1 -M * 19.8 -M *
EF Blacks Fork GS 9360 13.3 11.0 121 10.1 10.0 101
Hams Fork 7840 14.9 10.6 141 13.4 10.0 134
Henrys Fork 10182 -M -M * 13.8 -M *
Hewinta 9500 12.2 9.2 133 14.6 12.1 121
Hickerson Park 9122 9.8 7.1 138 10.4 9.2 113
Hole-in-Rock 9168 8.8 6.9 128 9.8 9.0 109
Indian Creek 9425 26.2 21.3 123 22.1 18.1 122
Kelley R.S. 8180 19.4 14.0 139 19.7 14.9 132
Spirit Lk 10235 19.3 11.6 166 18.0 15.6 115
Steel Creek Park 10158 18.2 13.4 136 17.6 14.2 124
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Basin Index (%) 137 120
UPPER BEAR RIVER
Bear River RS 8777 13.6 8.4 162 14.4 10.8 133
Bug Lake 7987 27.2 17.4 156 22.3 16.4 136
Burts Miller Ranch 8000 9.4 5.4 174 12.9 6.8 190
Chalk Creek #1 9171 30.5 21.0 145 26.9 21.0 128
Giveout 6930 14.7 8.0 184 14.6 10.7 136
Hayden Fork 9130 21.7 13.8 157 24.2 18.5 131
Kelley R.S. 8180 19.4 14.0 139 19.7 14.9 132
Lily Lake 9133 14.6 11.6 126 15.6 14.0 111
Monte Cristo 8932 37.5 24.6 152 -M 23.2 *
Salt River Summit 7640 18.5 13.0 142 17.6 14.6 121
Spring Creek Divide 9000 25.2 23.6 107 18.3 22.2 82
Trial Lake 9992 34.1 20.6 166 -M 20.4 *
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Basin Index (%) 147 124
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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.
