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: MAY 7 , 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 11.7 7.4 158 22.6 23.4 97
Blind Bull Sum 8650 25.6 24.0 107 -M 19.6 *
Cottonwood Creek 7670 20.7 15.4 134 31.9 28.6 112
East Rim Divide 7930 2.3 4.0 58 13.1 13.0 101
Grand Targhee 9260 45.4 47.1 96 33.1 36.4 91
Granite Creek 6770 10.5 7.8 135 16.4 21.1 78
Grassy Lake 7265 30.0 25.0 120 42.7 38.8 110
Gros Ventre Summit 8750 9.8 10.8 91 11.8 14.8 80
Gunsight Pass 9820 12.0 12.0 100 15.1 16.5 92
Lewis Lake Divide 7850 34.3 29.2 117 43.2 37.4 116
Loomis Park 8240 11.7 9.4 124 18.1 19.1 95
Phillips Bench 8200 26.5 24.8 107 32.3 29.0 111
Salt River Summit 7640 14.4 6.4 225 22.5 18.2 124
Snake River Station 6920 9.8 4.7 209 24.9 25.0 100
Somsen Ranch 6800 11.2 .0 * 23.5 18.6 126
Spring Creek Divide 9000 -M 24.4 * -M 26.2 *
Thumb Divide 7980 14.7 9.5 155 21.1 21.6 98
Togwotee Pass 9580 22.2 25.4 87 23.5 28.2 83
Triple Peak 8500 20.2 17.3 117 28.5 29.0 98
Two Ocean Plateau 9240 33.5 32.6 103 30.4 30.4 100
Willow Creek 8080 31.5 25.2 125 40.7 38.6 105
Younts Peak 8350 9.4 13.6 69 14.9 17.6 85
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Basin Index (%) 116 101
MADISON HEADWATERS IN WYOMING
Black Bear 8170 45.3 40.9 111 46.7 41.2 113
Canyon 7870 11.8 -M * 19.4 -M *
Madison Plateau 7750 27.7 22.7 122 32.4 28.2 115
West Yellowstone 6700 4.4 .0 * 20.7 16.1 129
Whiskey Creek 6800 19.2 11.6 166 28.3 22.8 124
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Basin Index (%) 128 118
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.5 24.7 83 20.6 23.8 87
Canyon 7870 11.8 -M * 19.4 -M *
Evening Star 9200 24.3 27.1 90 31.6 32.2 98
Fisher Creek 9100 35.3 36.0 98 38.7 38.2 101
Monument Peak 8850 20.0 21.8 92 26.9 26.2 103
Northeast Entrance 7350 .7 .2 350* 14.2 14.8 96
Parker Peak 9400 25.4 24.2 105 27.1 23.2 117
Sylvan Lake 8420 16.4 18.2 90 26.6 27.1 98
Thumb Divide 7980 14.7 9.5 155 21.1 21.6 98
Two Ocean Plateau 9240 33.5 32.6 103 30.4 30.4 100
White Mill 8700 25.1 26.8 94 25.9 25.8 100
Wolverine 7650 4.9 1.4 350 14.6 14.0 104
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Basin Index (%) 99 100
WIND RIVER
Burroughs Creek 8750 2.1 -M * 11.8 -M *
Castle Creek 8400 .0 .0 * 8.0 10.2 78
Cold Springs 9630 .4 2.3 17 12.0 11.7 103
Deer Park 9700 23.6 14.0 169 28.8 22.2 130
Hobbs Park 10100 17.1 16.0 107 19.8 17.4 114
Kirwin 9550 7.9 11.9 66 14.8 15.2 97
Little Warm 9370 6.9 8.0 86 14.8 14.2 104
South Pass 9040 18.7 12.8 146 23.5 18.6 126
St. Lawrence Alt 8620 1.3 -M * 13.0 -M *
Togwotee Pass 9580 22.2 25.4 87 23.5 28.2 83
Townsend Creek 8700 10.7 7.2 149 16.9 14.4 117
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Basin Index (%) 110 107
BIGHORN BASIN
Bald Mtn. 9380 17.9 20.6 87 17.4 19.1 91
Bear Trap Meadow 8200 .1 .2 50* 11.1 11.6 96
Bone Springs Div 9350 14.6 17.8 82 14.5 18.6 78
Grave Springs 8550 4.2 7.4 57 12.7 12.6 101
Kirwin 9550 7.9 11.9 66 14.8 15.2 97
Marquette 8760 6.8 7.2 94 12.9 12.8 101
Middle Powder 7760 8.2 10.0 82 11.7 12.8 91
Owl Creek 8975 .0 .4 0* 10.4 8.8 118
Powder River Pass 9480 5.0 9.2 54 15.5 15.8 98
Shell Creek 9580 13.7 16.4 84 16.4 17.0 96
Timber Creek 7950 .3 1.7 18 9.5 10.8 88
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Basin Index (%) 77 95
SHOSHONE RIVER
Blackwater 9780 21.2 26.5 80 24.9 26.3 95
Evening Star 9200 24.3 27.1 90 31.6 32.2 98
Marquette 8760 6.8 7.2 94 12.9 12.8 101
Sylvan Lake 8420 16.4 18.2 90 26.6 27.1 98
Sylvan Road 7120 .1 .8 12* 16.5 18.4 90
Younts Peak 8350 9.4 13.6 69 14.9 17.6 85
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Basin Index (%) 84 95
POWDER RIVER
Bear Trap Meadow 8200 .1 .2 50* 11.1 11.6 96
Cloud Peak Reservoir 9860 13.5 16.1 84 17.0 17.8 96
Grave Springs 8550 4.2 7.4 57 12.7 12.6 101
Hansen Sawmill 8360 2.2 2.6 85 10.7 11.2 96
Middle Powder 7760 8.2 10.0 82 11.7 12.8 91
Powder River Pass 9480 5.0 9.2 54 15.5 15.8 98
Soldier Park 8720 3.8 2.0 190 10.4 11.6 90
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Basin Index (%) 78 95
TONGUE RIVER
Big Goose 7990 7.0 8.1 86 12.4 14.0 89
Bone Springs Div 9350 14.6 17.8 82 14.5 18.6 78
Burgess Junction 7880 11.3 10.9 104 16.0 14.9 107
Dome Lake 8880 8.0 11.1 72 13.8 16.3 85
Little Goose 8870 6.7 10.0 67 14.0 16.2 86
Sucker Creek 8880 9.8 10.9 90 19.0 18.0 106
Tie Creek 6870 1.4 1.4 100 14.8 14.4 103
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Basin Index (%) 84 93
BELLE FOURCHE
Blind Park 6890 .0 .0 * 12.8 13.8 93
Cole Canyon 5910 .0 .0 * 12.4 12.6 98
North Rapid Creek 6130 .5 .0 * 10.6 11.4 93
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Basin Index (%) * 95
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 12.8 13.8 93
North Rapid Creek 6130 .5 .0 * 10.6 11.4 93
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Basin Index (%) * 93
UPPER N. PLATTE
Arapaho Ridge 10976 25.1 22.3 113 28.0 25.7 109
Blackhall Mtn 9839 34.3 32.8 105 41.5 36.9 112
Cinnabar Park 9707 -M 18.0 * 25.8 27.5 94
Columbine 9167 17.1 15.0 114 29.9 29.6 101
Divide Peak 8730 22.6 13.6 166 31.8 25.2 126
Joe Wright 10158 24.2 22.2 109 31.2 31.0 101
Laprele Creek 8390 6.0 3.2 188 15.5 15.5 100
Med Bow 10512 40.8 -M * 38.7 -M *
Never Summer 10323 26.8 22.2 121 21.4 20.8 103
North French Creek 10153 28.8 31.7 91 33.4 33.6 99
Old Battle 9860 40.8 35.2 116 45.8 39.2 117
Rawah 9069 7.9 4.8 165 19.7 20.1 98
Sage Creek Basin 7850 13.2 .0 * 22.0 15.0 147
Sand Lake 10098 30.6 32.2 95 31.7 30.2 105
South Brush Creek 8495 4.8 3.7 130 16.8 17.1 98
Tower 10620 54.4 47.6 114 55.2 45.6 121
Webber Springs 9260 26.0 19.8 131 35.3 30.2 117
Whiskey Park 9020 35.5 27.4 130 38.9 33.8 115
Willow Creek Pass 9523 17.5 15.0 117 19.8 16.7 119
Zirkel 9338 22.8 20.6 111 37.8 35.3 107
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Basin Index (%) 119 110
SWEETWATER
Deer Park 9700 23.6 14.0 169 28.8 22.2 130
Larsen Creek 9000 6.9 .4 1725* 17.4 16.2 107
South Pass 9040 18.7 12.8 146 23.5 18.6 126
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Basin Index (%) 181 122
LOWER N. PLATTE
Casper Mtn. 7920 7.3 10.8 68 16.0 18.0 89
Laprele Creek 8390 6.0 3.2 188 15.5 15.5 100
Reno Hill 8430 13.1 13.4 98 19.4 20.0 97
Windy Peak 7915 6.4 2.0 320 14.2 13.6 104
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Basin Index (%) 112 97
LARAMIE RIVER
Brooklyn Lake 10250 20.6 22.2 93 28.9 25.8 112
Cinnabar Park 9707 -M 18.0 * 25.8 27.5 94
Crow Creek 8335 .1 .0 * 11.3 13.5 84
Deadman Hill 10239 19.3 19.0 102 21.7 22.1 98
Rawah 9069 7.9 4.8 165 19.7 20.1 98
Roach 9740 14.5 15.9 91 23.7 22.2 107
Windy Peak 7915 6.4 2.0 320 14.2 13.6 104
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Basin Index (%) 108 100
S. PLATTE
Crow Creek 8335 .1 .0 * 11.3 13.5 84
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Basin Index (%) * 84
LITTLE SNAKE RIVER
Battle Mountain 7498 3.8 .0 * 24.3 17.8 137
Divide Peak 8730 22.6 13.6 166 31.8 25.2 126
Elk River 8739 15.3 9.4 163 30.1 23.0 131
Elkhead Divide 8800 21.0 -M * 33.8 -M *
Little Snake River 8928 31.6 20.8 152 45.9 37.6 122
Old Battle 9860 40.8 35.2 116 45.8 39.2 117
Sage Creek Basin 7850 13.2 .0 * 22.0 15.0 147
Sandstone RS 8152 12.1 3.4 356 27.0 20.3 133
Whiskey Park 9020 35.5 27.4 130 38.9 33.8 115
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Basin Index (%) 159 125
UPPER GREEN RIVER
Big Sandy Opening 9080 13.9 9.4 148 18.3 15.2 120
Blind Bull Sum 8650 25.6 24.0 107 -M 19.6 *
East Rim Divide 7930 2.3 4.0 58 13.1 13.0 101
Elkhart Park G.S. 9400 10.1 10.0 101 13.6 14.5 94
Gros Ventre Summit 8750 9.8 10.8 91 11.8 14.8 80
Gunsight Pass 9820 12.0 12.0 100 15.1 16.5 92
Indian Creek 9425 27.0 21.2 127 27.0 22.0 123
Kendall R.S. 7740 5.1 1.1 464* 14.5 15.0 97
Larsen Creek 9000 6.9 .4 1725* 17.4 16.2 107
Loomis Park 8240 11.7 9.4 124 18.1 19.1 95
New Fork Lake 8340 5.2 3.7 141 -M 12.4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 8.7 5.8 150 17.7 15.6 113
Spring Creek Divide 9000 -M 24.4 * -M 26.2 *
Triple Peak 8500 20.2 17.3 117 28.5 29.0 98
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Basin Index (%) 123 102
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.8 .4 2200* 16.5 14.5 114
Buck Pasture 9632 16.3 -M * 24.2 -M *
EF Blacks Fork GS 9360 7.7 5.3 145 13.9 14.0 99
Hams Fork 7840 7.3 .0 * 17.2 12.8 134
Henrys Fork 10182 -M -M * 17.5 -M *
Hewinta 9500 7.4 3.2 231 18.4 16.3 113
Hickerson Park 9122 3.6 1.4 257 14.2 12.5 114
Hole-in-Rock 9168 3.6 .6 600* 13.5 12.6 107
Indian Creek 9425 27.0 21.2 127 27.0 22.0 123
Kelley R.S. 8180 16.8 8.8 191 24.6 18.3 134
Spirit Lk 10235 19.1 12.2 157 23.8 19.9 120
Steel Creek Park 10158 19.5 17.0 115 22.7 19.6 116
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Basin Index (%) 172 118
UPPER BEAR RIVER
Bear River RS 8777 4.0 .0 * 17.8 13.8 129
Bug Lake 7987 26.2 12.9 203 27.2 19.5 139
Burts Miller Ranch 8000 .2 .0 * 15.7 8.8 178
Chalk Creek #1 9171 31.2 21.1 148 34.5 26.3 131
Giveout 6930 8.2 .0 * 17.4 14.4 121
Hayden Fork 9130 14.7 6.9 213 30.5 23.5 130
Kelley R.S. 8180 16.8 8.8 191 24.6 18.3 134
Lily Lake 9133 9.4 7.6 124 19.4 18.6 104
Monte Cristo 8932 42.6 20.9 204 42.2 28.2 150
Salt River Summit 7640 14.4 6.4 225 22.5 18.2 124
Spring Creek Divide 9000 -M 24.4 * -M 26.2 *
Trial Lake 9992 33.3 21.4 156 37.4 25.2 148
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Basin Index (%) 190 135
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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.
