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 12 , 2024
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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 5.2 4.2 124 23.4 23.6 99
Blind Bull Sum 8650 27.2 24.2 112 19.6 20.4 96
Cottonwood Creek 7670 13.7 14.0 98 31.2 29.8 105
East Rim Divide 7930 -M .6 * 13.4 13.6 99
Grand Targhee 9260 44.7 46.8 96 35.8 37.2 96
Granite Creek 6770 4.8 4.5 107 19.2 21.4 90
Grassy Lake 7265 20.9 21.4 98 38.2 39.8 96
Gros Ventre Summit 8750 7.7 9.4 82 -M 15.1 *
Gunsight Pass 9820 11.9 12.3 97 17.7 17.3 102
Lewis Lake Divide 7850 24.6 29.1 85 38.8 38.8 100
Loomis Park 8240 5.1 6.8 75 17.9 19.9 90
Phillips Bench 8200 24.8 23.1 107 33.4 30.2 111
Salt River Summit 7640 4.6 3.3 139 16.8 18.8 89
Snake River Station 6920 3.1 1.6 194* 25.0 26.0 96
Somsen Ranch 6800 2.8 .0 * 23.6 19.2 123
Spring Creek Divide 9000 25.4 23.7 107 25.9 27.0 96
Thumb Divide 7980 9.8 6.8 144 20.5 22.2 92
Togwotee Pass 9580 21.8 25.8 84 24.5 28.8 85
Triple Peak 8500 18.5 16.4 113 29.9 29.8 100
Two Ocean Plateau 9240 30.9 33.0 94 30.3 30.6 99
Willow Creek 8080 27.9 22.4 125 40.2 39.4 102
Younts Peak 8350 7.9 12.5 63 17.9 18.0 99
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Basin Index (%) 101 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 32.9 40.5 81 41.6 42.0 99
Canyon 7870 7.3 -M * 15.7 -M *
Madison Plateau 7750 17.2 21.2 81 25.8 30.1 86
West Yellowstone 6700 -M .0 * 14.8 16.3 91
Whiskey Creek 6800 7.9 9.4 84 21.6 23.4 92
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Basin Index (%) 82 93
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.3 24.2 84 20.7 24.6 84
Canyon 7870 7.3 -M * 15.7 -M *
Evening Star 9200 20.1 26.5 76 30.7 33.2 92
Fisher Creek 9100 25.7 36.2 71 31.7 39.4 80
Monument Peak 8850 17.0 21.1 81 23.9 26.6 90
Northeast Entrance 7350 .0 .0 * 13.8 15.2 91
Parker Peak 9400 22.7 23.2 98 26.7 23.4 114
Sylvan Lake 8420 12.5 17.0 74 26.8 27.4 98
Thumb Divide 7980 9.8 6.8 144 20.5 22.2 92
Two Ocean Plateau 9240 30.9 33.0 94 30.3 30.6 99
White Mill 8700 19.7 26.6 74 22.1 26.5 83
Wolverine 7650 .0 .0 * 15.9 14.8 107
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Basin Index (%) 83 93
WIND RIVER
Burroughs Creek 8750 5.4 -M * 13.9 -M *
Castle Creek 8400 .1 .0 * 10.0 10.8 93
Cold Springs 9630 3.1 2.0 155 14.8 13.0 114
Deer Park 9700 20.3 14.3 142 26.7 23.2 115
Hobbs Park 10100 21.8 16.0 136 23.8 18.2 131
Kirwin 9550 14.7 11.6 127 19.8 16.0 124
Little Warm 9370 8.6 7.4 116 17.3 14.8 117
South Pass 9040 16.1 13.2 122 23.2 19.5 119
St. Lawrence Alt 8620 .0 -M * 14.6 -M *
Togwotee Pass 9580 21.8 25.8 84 24.5 28.8 85
Townsend Creek 8700 10.6 4.1 259 19.5 15.5 126
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Basin Index (%) 124 112
BIGHORN BASIN
Bald Mtn. 9380 19.4 21.2 92 17.8 19.8 90
Bear Trap Meadow 8200 -M .2 * 12.2 12.4 98
Bone Springs Div 9350 17.8 17.6 101 16.4 18.9 87
Grave Springs 8550 5.0 6.4 78 12.9 12.8 101
Kirwin 9550 14.7 11.6 127 19.8 16.0 124
Marquette 8760 17.0 8.3 205 22.1 14.0 158
Middle Powder 7760 13.0 8.8 148 13.9 13.4 104
Owl Creek 8975 -M .5 * 11.9 9.4 127
Powder River Pass 9480 5.7 9.0 63 15.9 16.8 95
Shell Creek 9580 17.5 16.7 105 18.5 17.3 107
Timber Creek 7950 3.9 1.0 390 16.6 11.7 142
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Basin Index (%) 113 110
SHOSHONE RIVER
Blackwater 9780 25.2 24.0 105 28.2 26.8 105
Evening Star 9200 20.1 26.5 76 30.7 33.2 92
Marquette 8760 17.0 8.3 205 22.1 14.0 158
Sylvan Lake 8420 12.5 17.0 74 26.8 27.4 98
Sylvan Road 7120 -M .0 * 17.2 19.1 90
Younts Peak 8350 7.9 12.5 63 17.9 18.0 99
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Basin Index (%) 94 103
POWDER RIVER
Bear Trap Meadow 8200 -M .2 * 12.2 12.4 98
Cloud Peak Reservoir 9860 16.3 16.0 102 20.7 18.8 110
Grave Springs 8550 5.0 6.4 78 12.9 12.8 101
Hansen Sawmill 8360 .3 1.4 21 13.6 12.3 111
Middle Powder 7760 13.0 8.8 148 13.9 13.4 104
Powder River Pass 9480 5.7 9.0 63 15.9 16.8 95
Soldier Park 8720 .4 .7 57* 13.7 12.0 114
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Basin Index (%) 96 104
TONGUE RIVER
Big Goose 7990 8.2 8.2 100 16.6 15.7 106
Bone Springs Div 9350 17.8 17.6 101 16.4 18.9 87
Burgess Junction 7880 10.4 10.4 100 16.9 16.0 106
Dome Lake 8880 -M 10.6 * 17.8 18.2 98
Little Goose 8870 11.6 9.4 123 19.6 16.9 116
Sucker Creek 8880 11.6 12.2 95 21.2 19.1 111
Tie Creek 6870 .4 .2 200* 16.5 15.8 104
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Basin Index (%) 103 104
BELLE FOURCHE
Blind Park 6890 .2 .0 * 11.8 14.4 82
Cole Canyon 5910 .1 .0 * 11.9 13.6 88
North Rapid Creek 6130 -M .0 * 11.8 12.2 97
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Basin Index (%) * 88
CHEYENNE RIVER BASIN
Blind Park 6890 .2 .0 * 11.8 14.4 82
North Rapid Creek 6130 -M .0 * 11.8 12.2 97
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Basin Index (%) * 89
UPPER N. PLATTE
Arapaho Ridge 10976 23.9 22.4 107 27.2 27.1 100
Blackhall Mtn 9839 37.2 33.3 112 41.8 38.3 109
Cinnabar Park 9707 18.7 16.6 113 27.6 27.8 99
Columbine 9167 14.3 10.8 132 30.9 30.4 102
Divide Peak 8730 16.5 12.6 131 29.5 25.6 115
Joe Wright 10158 23.7 22.4 106 31.6 32.4 98
Laprele Creek 8390 4.3 .9 478* 17.0 16.0 106
Med Bow 10512 44.7 -M * 40.1 -M *
Never Summer 10323 25.0 22.2 113 20.6 21.5 96
North French Creek 10153 31.4 32.3 97 33.8 35.1 96
Old Battle 9860 36.6 37.2 98 40.2 41.2 98
Rawah 9069 9.6 3.2 300 21.1 20.2 104
Sage Creek Basin 7850 -M .0 * 18.9 16.1 117
Sand Lake 10098 37.0 32.1 115 36.7 31.5 117
South Brush Creek 8495 4.4 .7 629* 16.1 18.6 87
Tower 10620 47.7 48.4 99 48.3 47.8 101
Webber Springs 9260 21.2 17.4 122 30.8 31.6 97
Whiskey Park 9020 28.6 26.0 110 35.2 35.2 100
Willow Creek Pass 9523 15.7 13.6 115 18.7 16.8 111
Zirkel 9338 17.2 18.8 91 34.6 35.6 97
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Basin Index (%) 111 102
SWEETWATER
Deer Park 9700 20.3 14.3 142 26.7 23.2 115
Larsen Creek 9000 -M .2 * 16.7 16.5 101
South Pass 9040 16.1 13.2 122 23.2 19.5 119
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Basin Index (%) 132 112
LOWER N. PLATTE
Casper Mtn. 7920 11.1 9.7 114 21.6 18.3 118
Laprele Creek 8390 4.3 .9 478* 17.0 16.0 106
Reno Hill 8430 11.6 9.4 123 21.6 21.2 102
Windy Peak 7915 5.1 .0 * 15.0 14.3 105
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Basin Index (%) 160 108
LARAMIE RIVER
Brooklyn Lake 10250 24.3 20.8 117 31.4 27.2 115
Cinnabar Park 9707 18.7 16.6 113 27.6 27.8 99
Crow Creek 8335 .0 .0 * 13.0 13.8 94
Deadman Hill 10239 23.3 18.5 126 23.7 23.2 102
Rawah 9069 9.6 3.2 300 21.1 20.2 104
Roach 9740 13.5 14.6 92 21.8 22.8 96
Windy Peak 7915 5.1 .0 * 15.0 14.3 105
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Basin Index (%) 128 103
S. PLATTE
Crow Creek 8335 .0 .0 * 13.0 13.8 94
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Basin Index (%) * 94
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 22.1 18.4 120
Divide Peak 8730 16.5 12.6 131 29.5 25.6 115
Elk River 8739 6.6 5.0 132 23.5 23.5 100
Elkhead Divide 8800 15.8 -M * 27.9 -M *
Little Snake River 8928 24.6 20.6 119 39.6 39.0 102
Old Battle 9860 36.6 37.2 98 40.2 41.2 98
Sage Creek Basin 7850 -M .0 * 18.9 16.1 117
Sandstone RS 8152 5.9 .6 983* 21.9 20.7 106
Whiskey Park 9020 28.6 26.0 110 35.2 35.2 100
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Basin Index (%) 116 105
UPPER GREEN RIVER
Big Sandy Opening 9080 10.2 9.2 111 17.4 15.8 110
Blind Bull Sum 8650 27.2 24.2 112 19.6 20.4 96
East Rim Divide 7930 -M .6 * 13.4 13.6 99
Elkhart Park G.S. 9400 7.7 9.4 82 14.4 15.1 95
Gros Ventre Summit 8750 7.7 9.4 82 -M 15.1 *
Gunsight Pass 9820 11.9 12.3 97 17.7 17.3 102
Indian Creek 9425 23.5 21.2 111 24.0 23.2 103
Kendall R.S. 7740 .0 .0 * 15.2 15.6 97
Larsen Creek 9000 -M .2 * 16.7 16.5 101
Loomis Park 8240 5.1 6.8 75 17.9 19.9 90
New Fork Lake 8340 -M 2.7 * -M 13.0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 1.1 3.5 31 16.0 16.0 100
Spring Creek Divide 9000 25.4 23.7 107 25.9 27.0 96
Triple Peak 8500 18.5 16.4 113 29.9 29.8 100
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Basin Index (%) 102 99
LOWER GREEN RIVER
Blacks Fork Jct 8869 1.9 .0 * 17.1 15.1 113
Buck Pasture 9632 12.4 -M * 21.0 -M *
EF Blacks Fork GS 9360 5.0 3.0 167 13.7 14.4 95
Hams Fork 7840 -M .0 * 13.8 13.8 100
Henrys Fork 10182 -M -M * 17.5 -M *
Hewinta 9500 5.2 1.0 520* 18.4 17.0 108
Hickerson Park 9122 .1 .2 50* 16.5 13.0 127
Hole-in-Rock 9168 .3 .0 * 14.1 13.1 108
Indian Creek 9425 23.5 21.2 111 24.0 23.2 103
Kelley R.S. 8180 10.0 8.0 125 20.8 19.3 108
Spirit Lk 10235 11.5 9.6 120 23.0 20.0 115
Steel Creek Park 10158 17.9 17.8 101 22.5 20.6 109
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Basin Index (%) 124 108
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 17.2 14.4 119
Bug Lake 7987 13.7 12.1 113 26.3 20.0 132
Burts Miller Ranch 8000 .2 .0 * 14.3 8.8 162
Chalk Creek #1 9171 20.2 19.4 104 29.5 27.7 106
Giveout 6930 -M .0 * 14.8 15.0 99
Hayden Fork 9130 5.7 3.8 150 27.7 24.3 114
Kelley R.S. 8180 10.0 8.0 125 20.8 19.3 108
Lily Lake 9133 9.1 5.0 182 19.2 19.8 97
Monte Cristo 8932 28.3 20.8 136 34.1 29.4 116
Salt River Summit 7640 4.6 3.3 139 16.8 18.8 89
Spring Creek Divide 9000 25.4 23.7 107 25.9 27.0 96
Trial Lake 9992 28.4 20.9 136 31.4 26.5 118
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Basin Index (%) 124 111
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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.