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: APRIL 18 , 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 18.5 15.2 122 21.9 21.3 103
Blind Bull Sum 8650 27.0 25.1 108 19.5 18.3 107
Cottonwood Creek 7670 25.1 20.1 125 28.9 26.4 109
East Rim Divide 7930 11.4 9.8 116 12.4 11.6 107
Grand Targhee 9260 48.0 46.8 103 -M 34.3 *
Granite Creek 6770 18.4 12.6 146 16.1 19.4 83
Grassy Lake 7265 36.7 33.0 111 40.9 37.2 110
Gros Ventre Summit 8750 12.5 13.2 95 11.7 13.2 89
Gunsight Pass 9820 13.7 13.4 102 13.9 14.8 94
Lewis Lake Divide 7850 38.2 33.0 116 41.4 34.8 119
Loomis Park 8240 16.7 13.8 121 17.4 17.2 101
Phillips Bench 8200 29.6 26.6 111 31.4 27.4 115
Salt River Summit 7640 20.7 11.0 188 21.0 16.8 125
Snake River Station 6920 18.2 15.2 120 23.8 23.3 102
Somsen Ranch 6800 -M 8.0 * -M 17.4 *
Spring Creek Divide 9000 29.8 25.3 118 -M 24.4 *
Thumb Divide 7980 20.7 16.3 127 20.3 19.2 106
Togwotee Pass 9580 22.9 24.8 92 21.9 25.9 85
Triple Peak 8500 25.8 22.0 117 27.1 26.4 103
Two Ocean Plateau 9240 33.6 32.1 105 28.7 28.2 102
Willow Creek 8080 39.7 28.5 139 37.5 34.9 107
Younts Peak 8350 16.1 15.0 107 14.2 16.0 89
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Basin Index (%) 116 104
MADISON HEADWATERS IN WYOMING
Black Bear 8170 42.7 39.7 108 45.1 38.6 117
Canyon 7870 15.0 -M * 18.1 -M *
Madison Plateau 7750 31.2 23.4 133 30.9 25.4 122
West Yellowstone 6700 15.5 7.0 221 19.9 14.9 134
Whiskey Creek 6800 21.8 15.8 138 27.2 21.0 130
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Basin Index (%) 129 123
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.6 23.5 88 19.5 21.8 89
Canyon 7870 15.0 -M * 18.1 -M *
Evening Star 9200 27.4 26.8 102 30.0 30.0 100
Fisher Creek 9100 35.4 35.4 100 36.8 35.2 105
Monument Peak 8850 23.2 22.3 104 25.7 23.4 110
Northeast Entrance 7350 8.9 7.5 119 13.2 13.6 97
Parker Peak 9400 27.4 22.8 120 25.6 21.2 121
Sylvan Lake 8420 20.8 20.9 100 25.2 24.6 102
Thumb Divide 7980 20.7 16.3 127 20.3 19.2 106
Two Ocean Plateau 9240 33.6 32.1 105 28.7 28.2 102
White Mill 8700 25.8 25.6 101 24.5 23.9 103
Wolverine 7650 12.5 8.2 152 13.4 13.0 103
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Basin Index (%) 106 103
WIND RIVER
Burroughs Creek 8750 10.1 -M * 11.3 -M *
Castle Creek 8400 4.4 5.3 83 7.5 9.0 83
Cold Springs 9630 7.3 6.6 111 10.8 9.8 110
Deer Park 9700 24.0 16.0 150 25.6 20.0 128
Hobbs Park 10100 16.6 15.8 105 16.5 14.5 114
Kirwin 9550 10.6 11.9 89 13.8 13.0 106
Little Warm 9370 10.9 10.4 105 13.8 12.5 110
South Pass 9040 19.4 15.6 124 20.8 17.0 122
St. Lawrence Alt 8620 6.9 -M * 11.2 -M *
Togwotee Pass 9580 22.9 24.8 92 21.9 25.9 85
Townsend Creek 8700 12.2 9.8 124 14.6 12.8 114
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Basin Index (%) 110 108
BIGHORN BASIN
Bald Mtn. 9380 19.0 20.0 95 16.0 16.9 95
Bear Trap Meadow 8200 8.0 4.0 200 10.4 9.8 106
Bone Springs Div 9350 16.0 17.9 89 13.0 16.8 77
Grave Springs 8550 9.4 8.4 112 12.0 10.7 112
Kirwin 9550 10.6 11.9 89 13.8 13.0 106
Marquette 8760 9.0 7.8 115 11.0 10.6 104
Middle Powder 7760 12.1 11.4 106 10.9 10.5 104
Owl Creek 8975 6.6 4.6 143 9.7 6.8 143
Powder River Pass 9480 9.6 10.2 94 14.1 14.1 100
Shell Creek 9580 14.0 16.4 85 14.6 14.9 98
Timber Creek 7950 5.6 5.2 108 8.4 8.8 95
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Basin Index (%) 102 101
SHOSHONE RIVER
Blackwater 9780 23.0 25.0 92 23.6 23.6 100
Evening Star 9200 27.4 26.8 102 30.0 30.0 100
Marquette 8760 9.0 7.8 115 11.0 10.6 104
Sylvan Lake 8420 20.8 20.9 100 25.2 24.6 102
Sylvan Road 7120 8.1 10.2 79 15.5 17.4 89
Younts Peak 8350 16.1 15.0 107 14.2 16.0 89
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Basin Index (%) 99 98
POWDER RIVER
Bear Trap Meadow 8200 8.0 4.0 200 10.4 9.8 106
Cloud Peak Reservoir 9860 15.0 15.1 99 15.6 14.9 105
Grave Springs 8550 9.4 8.4 112 12.0 10.7 112
Hansen Sawmill 8360 7.6 5.7 133 9.9 9.5 104
Middle Powder 7760 12.1 11.4 106 10.9 10.5 104
Powder River Pass 9480 9.6 10.2 94 14.1 14.1 100
Soldier Park 8720 7.7 6.8 113 9.5 10.7 89
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Basin Index (%) 113 103
TONGUE RIVER
Big Goose 7990 10.2 8.8 116 11.5 11.0 105
Bone Springs Div 9350 16.0 17.9 89 13.0 16.8 77
Burgess Junction 7880 12.1 11.8 103 14.5 13.4 108
Dome Lake 8880 10.8 12.1 89 12.8 14.4 89
Little Goose 8870 10.2 10.8 94 12.8 13.8 93
Sucker Creek 8880 12.8 12.9 99 17.3 15.0 115
Tie Creek 6870 8.2 4.3 191 13.8 12.4 111
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Basin Index (%) 102 99
BELLE FOURCHE
Blind Park 6890 5.5 4.0 138 11.8 12.0 98
Cole Canyon 5910 6.1 3.0 203 11.1 9.8 113
North Rapid Creek 6130 5.6 4.4 127 9.8 9.6 102
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Basin Index (%) 151 104
CHEYENNE RIVER BASIN
Blind Park 6890 5.5 4.0 138 11.8 12.0 98
North Rapid Creek 6130 5.6 4.4 127 9.8 9.6 102
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Basin Index (%) 132 100
UPPER N. PLATTE
Arapaho Ridge 10976 26.1 23.2 112 25.5 23.1 110
Blackhall Mtn 9839 37.6 32.9 114 38.8 31.8 122
Cinnabar Park 9707 -M 20.4 * 24.0 24.6 98
Columbine 9167 28.2 21.8 129 27.8 26.6 105
Divide Peak 8730 28.5 19.4 147 30.0 23.0 130
Joe Wright 10158 26.4 22.0 120 29.2 27.8 105
Laprele Creek 8390 11.6 8.2 141 14.0 12.8 109
Med Bow 10512 39.2 -M * 35.6 -M *
Never Summer 10323 27.1 21.7 125 19.8 18.4 108
North French Creek 10153 30.1 31.6 95 30.7 28.5 108
Old Battle 9860 43.0 33.4 129 -M 35.6 *
Rawah 9069 13.4 10.8 124 17.9 17.0 105
Sage Creek Basin 7850 24.9 8.5 293 21.0 13.6 154
Sand Lake 10098 29.1 30.2 96 28.7 26.8 107
South Brush Creek 8495 12.3 9.4 131 15.0 14.4 104
Tower 10620 52.8 45.2 117 50.0 41.6 120
Webber Springs 9260 29.6 22.2 133 33.4 27.4 122
Whiskey Park 9020 38.6 26.3 147 36.6 29.4 124
Willow Creek Pass 9523 19.1 14.4 133 18.5 14.6 127
Zirkel 9338 31.5 25.5 124 36.0 33.1 109
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Basin Index (%) 125 114
SWEETWATER
Deer Park 9700 24.0 16.0 150 25.6 20.0 128
Larsen Creek 9000 10.5 8.8 119 14.9 14.4 103
South Pass 9040 19.4 15.6 124 20.8 17.0 122
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Basin Index (%) 133 119
LOWER N. PLATTE
Casper Mtn. 7920 14.3 13.5 106 15.2 15.2 100
Laprele Creek 8390 11.6 8.2 141 14.0 12.8 109
Reno Hill 8430 16.2 13.8 117 17.7 16.6 107
Windy Peak 7915 10.9 6.9 158 13.2 11.2 118
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Basin Index (%) 125 108
LARAMIE RIVER
Brooklyn Lake 10250 24.9 22.0 113 26.6 23.4 114
Cinnabar Park 9707 -M 20.4 * 24.0 24.6 98
Crow Creek 8335 3.4 4.0 85 9.5 11.8 81
Deadman Hill 10239 19.8 17.5 113 19.4 19.4 100
Rawah 9069 13.4 10.8 124 17.9 17.0 105
Roach 9740 17.6 16.2 109 21.8 20.2 108
Windy Peak 7915 10.9 6.9 158 13.2 11.2 118
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Basin Index (%) 116 104
S. PLATTE
Crow Creek 8335 3.4 4.0 85 9.5 11.8 81
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Basin Index (%) 85 81
LITTLE SNAKE RIVER
Battle Mountain 7498 14.5 6.6 220 23.2 16.2 143
Divide Peak 8730 28.5 19.4 147 30.0 23.0 130
Elk River 8739 26.3 15.6 169 28.7 20.5 140
Elkhead Divide 8800 31.0 -M * 32.2 -M *
Little Snake River 8928 37.2 24.9 149 43.8 34.3 128
Old Battle 9860 43.0 33.4 129 -M 35.6 *
Sage Creek Basin 7850 24.9 8.5 293 21.0 13.6 154
Sandstone RS 8152 23.0 10.2 225 25.9 18.5 140
Whiskey Park 9020 38.6 26.3 147 36.6 29.4 124
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Basin Index (%) 163 135
UPPER GREEN RIVER
Big Sandy Opening 9080 14.9 13.6 110 15.8 13.8 114
Blind Bull Sum 8650 27.0 25.1 108 19.5 18.3 107
East Rim Divide 7930 11.4 9.8 116 12.4 11.6 107
Elkhart Park G.S. 9400 12.4 12.6 98 12.4 13.0 95
Gros Ventre Summit 8750 12.5 13.2 95 11.7 13.2 89
Gunsight Pass 9820 13.7 13.4 102 13.9 14.8 94
Indian Creek 9425 29.9 24.8 121 25.3 20.2 125
Kendall R.S. 7740 12.2 9.8 124 13.7 13.6 101
Larsen Creek 9000 10.5 8.8 119 14.9 14.4 103
Loomis Park 8240 16.7 13.8 121 17.4 17.2 101
New Fork Lake 8340 10.8 9.6 112 -M 11.0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.3 10.9 131 16.6 14.2 117
Spring Creek Divide 9000 29.8 25.3 118 -M 24.4 *
Triple Peak 8500 25.8 22.0 117 27.1 26.4 103
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Basin Index (%) 114 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.8 7.6 168 15.1 13.0 116
Buck Pasture 9632 20.4 -M * 22.4 -M *
EF Blacks Fork GS 9360 13.0 11.4 114 12.2 12.1 101
Hams Fork 7840 15.1 7.8 194 15.5 11.4 136
Henrys Fork 10182 -M -M * 16.0 -M *
Hewinta 9500 11.7 9.2 127 16.8 14.4 117
Hickerson Park 9122 10.4 6.0 173 13.1 11.2 117
Hole-in-Rock 9168 9.5 5.7 167 12.8 10.8 119
Indian Creek 9425 29.9 24.8 121 25.3 20.2 125
Kelley R.S. 8180 21.9 14.4 152 22.6 17.0 133
Spirit Lk 10235 22.3 12.8 174 22.1 19.0 116
Steel Creek Park 10158 21.3 15.8 135 20.7 17.2 120
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Basin Index (%) 145 120
UPPER BEAR RIVER
Bear River RS 8777 11.6 4.4 264 16.6 12.8 130
Bug Lake 7987 30.9 18.3 169 25.6 18.8 136
Burts Miller Ranch 8000 7.6 .6 1267* 14.8 8.6 172
Chalk Creek #1 9171 34.3 23.5 146 32.9 24.0 137
Giveout 6930 14.7 3.3 445 16.2 13.1 124
Hayden Fork 9130 22.4 13.2 170 28.5 21.8 131
Kelley R.S. 8180 21.9 14.4 152 22.6 17.0 133
Lily Lake 9133 14.8 12.0 123 18.0 16.0 112
Monte Cristo 8932 45.6 27.3 167 -M 27.0 *
Salt River Summit 7640 20.7 11.0 188 21.0 16.8 125
Spring Creek Divide 9000 29.8 25.3 118 -M 24.4 *
Trial Lake 9992 39.2 22.2 177 35.3 23.2 152
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Basin Index (%) 167 135
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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.
