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: MAY 17 , 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 4.1 .6 683* 22.9 24.2 95
Blind Bull Sum 8650 26.3 22.6 116 20.7 20.7 100
Cottonwood Creek 7670 14.8 9.1 163 32.9 30.0 110
East Rim Divide 7930 -M .0 * 13.5 13.8 98
Grand Targhee 9260 43.5 44.2 98 33.7 37.5 90
Granite Creek 6770 3.1 1.2 258* 16.7 22.2 75
Grassy Lake 7265 24.6 19.0 129 43.4 40.5 107
Gros Ventre Summit 8750 4.4 7.4 59 11.8 15.2 78
Gunsight Pass 9820 8.7 11.0 79 15.5 17.4 89
Lewis Lake Divide 7850 27.5 23.4 118 43.4 39.2 111
Loomis Park 8240 6.0 4.6 130 18.3 20.4 90
Phillips Bench 8200 20.8 21.0 99 32.6 30.8 106
Salt River Summit 7640 5.8 .0 * 23.1 18.9 122
Snake River Station 6920 .0 .0 * 25.0 26.6 94
Somsen Ranch 6800 .5 .0 * 23.9 19.6 122
Spring Creek Divide 9000 26.0 21.7 120 33.9 27.5 123
Thumb Divide 7980 6.9 3.6 192 21.4 22.3 96
Togwotee Pass 9580 19.1 23.4 82 24.5 29.0 84
Triple Peak 8500 14.3 12.6 113 28.9 30.2 96
Two Ocean Plateau 9240 28.9 30.8 94 31.0 31.2 99
Willow Creek 8080 22.8 18.2 125 41.7 40.0 104
Younts Peak 8350 .4 9.0 4 15.5 18.2 85
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Basin Index (%) 109 100
MADISON HEADWATERS IN WYOMING
Black Bear 8170 43.7 36.6 119 47.5 42.8 111
Canyon 7870 6.3 -M * 19.8 -M *
Madison Plateau 7750 23.4 16.8 139 32.9 30.6 108
West Yellowstone 6700 .0 .0 * 20.9 16.8 124
Whiskey Creek 6800 14.5 6.9 210 28.6 24.2 118
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Basin Index (%) 135 114
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 19.3 23.6 82 21.1 25.0 84
Canyon 7870 6.3 -M * 19.8 -M *
Evening Star 9200 21.6 24.6 88 32.4 33.8 96
Fisher Creek 9100 31.8 36.2 88 39.2 40.9 96
Monument Peak 8850 14.6 19.5 75 27.4 27.2 101
Northeast Entrance 7350 .0 .0 * 14.4 16.2 89
Parker Peak 9400 19.3 20.9 92 27.5 24.0 115
Sylvan Lake 8420 10.3 14.3 72 26.9 27.9 96
Thumb Divide 7980 6.9 3.6 192 21.4 22.3 96
Two Ocean Plateau 9240 28.9 30.8 94 31.0 31.2 99
White Mill 8700 21.7 24.2 90 26.4 27.6 96
Wolverine 7650 .0 .0 * 14.9 15.2 98
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Basin Index (%) 88 97
WIND RIVER
Burroughs Creek 8750 .0 -M * 12.2 -M *
Castle Creek 8400 .0 .0 * 8.5 11.6 73
Cold Springs 9630 .0 .0 * 13.0 13.5 96
Deer Park 9700 19.6 12.2 161 29.9 23.4 128
Hobbs Park 10100 16.2 16.0 101 22.0 18.8 117
Kirwin 9550 5.4 10.4 52 16.5 16.3 101
Little Warm 9370 1.5 5.2 29 15.3 15.2 101
South Pass 9040 13.6 9.8 139 24.8 19.6 127
St. Lawrence Alt 8620 .0 -M * 14.6 -M *
Togwotee Pass 9580 19.1 23.4 82 24.5 29.0 84
Townsend Creek 8700 6.1 1.4 436 19.1 15.7 122
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Basin Index (%) 104 106
BIGHORN BASIN
Bald Mtn. 9380 15.7 19.4 81 18.4 20.3 91
Bear Trap Meadow 8200 .0 .0 * 13.1 12.6 104
Bone Springs Div 9350 11.8 15.4 77 15.6 19.4 80
Grave Springs 8550 .1 4.4 2 15.2 13.2 115
Kirwin 9550 5.4 10.4 52 16.5 16.3 101
Marquette 8760 2.9 5.0 58 14.1 14.9 95
Middle Powder 7760 .4 5.5 7 14.2 13.6 104
Owl Creek 8975 .0 .0 * 11.4 9.5 120
Powder River Pass 9480 .0 7.5 0 16.7 17.0 98
Shell Creek 9580 11.6 15.4 75 17.1 17.6 97
Timber Creek 7950 .1 .0 * 10.9 12.0 91
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Basin Index (%) 58 98
SHOSHONE RIVER
Blackwater 9780 20.8 23.1 90 26.1 27.5 95
Evening Star 9200 21.6 24.6 88 32.4 33.8 96
Marquette 8760 2.9 5.0 58 14.1 14.9 95
Sylvan Lake 8420 10.3 14.3 72 26.9 27.9 96
Sylvan Road 7120 .0 .0 * 16.6 19.2 86
Younts Peak 8350 .4 9.0 4 15.5 18.2 85
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Basin Index (%) 74 93
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 13.1 12.6 104
Cloud Peak Reservoir 9860 13.4 14.5 92 20.0 19.5 103
Grave Springs 8550 .1 4.4 2 15.2 13.2 115
Hansen Sawmill 8360 .0 .0 * 12.8 13.2 97
Middle Powder 7760 .4 5.5 7 14.2 13.6 104
Powder River Pass 9480 .0 7.5 0 16.7 17.0 98
Soldier Park 8720 .1 .1 100* 12.4 12.8 97
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Basin Index (%) 44 102
TONGUE RIVER
Big Goose 7990 2.5 6.2 40 14.4 15.8 91
Bone Springs Div 9350 11.8 15.4 77 15.6 19.4 80
Burgess Junction 7880 6.9 8.6 80 17.3 16.4 105
Dome Lake 8880 4.2 8.2 51 15.1 19.0 79
Little Goose 8870 3.3 8.0 41 16.1 17.4 93
Sucker Creek 8880 6.1 9.1 67 20.2 19.9 102
Tie Creek 6870 .0 .0 * 16.3 16.1 101
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Basin Index (%) 63 93
BELLE FOURCHE
Blind Park 6890 .0 .0 * 14.2 14.6 97
Cole Canyon 5910 .0 .0 * 14.1 14.0 101
North Rapid Creek 6130 .1 .0 * 12.6 12.6 100
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Basin Index (%) * 99
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 14.2 14.6 97
North Rapid Creek 6130 .1 .0 * 12.6 12.6 100
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Basin Index (%) * 99
UPPER N. PLATTE
Arapaho Ridge 10976 22.4 19.8 113 29.4 28.2 104
Blackhall Mtn 9839 29.7 27.9 106 42.7 39.0 109
Cinnabar Park 9707 -M 14.2 * 26.8 27.9 96
Columbine 9167 7.5 4.8 156 31.2 30.8 101
Divide Peak 8730 13.0 7.5 173 32.9 25.7 128
Joe Wright 10158 22.0 20.4 108 32.7 32.8 100
Laprele Creek 8390 .1 .0 * 16.7 16.4 102
Med Bow 10512 39.6 -M * 40.4 -M *
Never Summer 10323 25.1 20.4 123 23.2 21.9 106
North French Creek 10153 23.9 31.3 76 34.4 35.4 97
Old Battle 9860 40.3 34.7 116 46.7 41.6 112
Rawah 9069 .6 .1 600* 20.8 20.2 103
Sage Creek Basin 7850 -M .0 * 22.6 16.4 138
Sand Lake 10098 28.3 29.8 95 34.2 31.6 108
South Brush Creek 8495 .2 .0 * 17.4 19.0 92
Tower 10620 54.5 46.2 118 56.8 48.6 117
Webber Springs 9260 21.1 13.0 162 35.9 32.0 112
Whiskey Park 9020 27.8 23.6 118 39.3 35.3 111
Willow Creek Pass 9523 13.8 11.3 122 21.1 17.3 122
Zirkel 9338 11.2 11.6 97 38.3 35.6 108
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Basin Index (%) 113 109
SWEETWATER
Deer Park 9700 19.6 12.2 161 29.9 23.4 128
Larsen Creek 9000 -M .0 * 17.5 16.5 106
South Pass 9040 13.6 9.8 139 24.8 19.6 127
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Basin Index (%) 151 121
LOWER N. PLATTE
Casper Mtn. 7920 .2 4.0 5 21.1 18.6 113
Laprele Creek 8390 .1 .0 * 16.7 16.4 102
Reno Hill 8430 7.1 8.0 89 22.4 21.6 104
Windy Peak 7915 .0 .0 * 15.4 14.4 107
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Basin Index (%) 62 106
LARAMIE RIVER
Brooklyn Lake 10250 14.3 18.4 78 30.4 27.4 111
Cinnabar Park 9707 -M 14.2 * 26.8 27.9 96
Crow Creek 8335 .0 .0 * 12.6 14.0 90
Deadman Hill 10239 17.5 16.8 104 24.7 23.7 104
Rawah 9069 .6 .1 600* 20.8 20.2 103
Roach 9740 10.9 11.2 97 25.6 24.0 107
Windy Peak 7915 .0 .0 * 15.4 14.4 107
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Basin Index (%) 93* 103
S. PLATTE
Crow Creek 8335 .0 .0 * 12.6 14.0 90
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Basin Index (%) * 90
LITTLE SNAKE RIVER
Battle Mountain 7498 -M .0 * 24.4 18.6 131
Divide Peak 8730 13.0 7.5 173 32.9 25.7 128
Elk River 8739 4.6 .6 767* 30.3 23.6 128
Elkhead Divide 8800 12.8 -M * 34.2 -M *
Little Snake River 8928 23.8 14.5 164 46.8 39.4 119
Old Battle 9860 40.3 34.7 116 46.7 41.6 112
Sage Creek Basin 7850 -M .0 * 22.6 16.4 138
Sandstone RS 8152 2.5 .0 * 27.4 21.5 127
Whiskey Park 9020 27.8 23.6 118 39.3 35.3 111
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Basin Index (%) 138 122
UPPER GREEN RIVER
Big Sandy Opening 9080 7.4 6.8 109 18.6 16.0 116
Blind Bull Sum 8650 26.3 22.6 116 20.7 20.7 100
East Rim Divide 7930 -M .0 * 13.5 13.8 98
Elkhart Park G.S. 9400 5.0 7.5 67 14.1 16.0 88
Gros Ventre Summit 8750 4.4 7.4 59 11.8 15.2 78
Gunsight Pass 9820 8.7 11.0 79 15.5 17.4 89
Indian Creek 9425 21.7 20.5 106 27.6 23.6 117
Kendall R.S. 7740 .0 .0 * 14.6 16.0 91
Larsen Creek 9000 -M .0 * 17.5 16.5 106
Loomis Park 8240 6.0 4.6 130 18.3 20.4 90
New Fork Lake 8340 -M .0 * -M 13.7 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 18.5 16.1 115
Spring Creek Divide 9000 26.0 21.7 120 33.9 27.5 123
Triple Peak 8500 14.3 12.6 113 28.9 30.2 96
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Basin Index (%) 104 102
LOWER GREEN RIVER
Blacks Fork Jct 8869 .6 .0 * 16.8 15.1 111
Buck Pasture 9632 10.1 -M * 24.5 -M *
EF Blacks Fork GS 9360 .1 .0 * 14.4 14.9 97
Hams Fork 7840 -M .0 * 17.5 14.0 125
Henrys Fork 10182 -M -M * 17.6 -M *
Hewinta 9500 .0 .0 * 18.9 17.1 111
Hickerson Park 9122 .0 .0 * 14.3 13.2 108
Hole-in-Rock 9168 .1 .0 * 13.8 13.4 103
Indian Creek 9425 21.7 20.5 106 27.6 23.6 117
Kelley R.S. 8180 9.8 3.2 306 24.9 19.8 126
Spirit Lk 10235 14.4 5.0 288 24.3 20.2 120
Steel Creek Park 10158 16.4 15.4 106 23.2 20.9 111
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Basin Index (%) 143* 114
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 17.9 14.4 124
Bug Lake 7987 17.3 8.4 206 28.4 20.2 141
Burts Miller Ranch 8000 .2 .0 * 15.9 9.3 171
Chalk Creek #1 9171 23.7 15.7 151 35.0 28.4 123
Giveout 6930 .0 .0 * 18.1 15.3 118
Hayden Fork 9130 7.2 .3 2400* 30.8 24.8 124
Kelley R.S. 8180 9.8 3.2 306 24.9 19.8 126
Lily Lake 9133 2.2 .0 * 19.6 20.2 97
Monte Cristo 8932 33.0 17.6 188 43.4 29.8 146
Salt River Summit 7640 5.8 .0 * 23.1 18.9 122
Spring Creek Divide 9000 26.0 21.7 120 33.9 27.5 123
Trial Lake 9992 27.5 18.2 151 38.0 27.0 141
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Basin Index (%) 179 129
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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.