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 FRIDAY: MAY 10 , 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 6.9 5.6 123 23.5 23.6 100
Blind Bull Sum 8650 27.3 24.2 113 19.6 20.0 98
Cottonwood Creek 7670 14.9 15.1 99 30.5 29.4 104
East Rim Divide 7930 .0 1.4 0 13.3 13.2 101
Grand Targhee 9260 45.7 46.6 98 35.3 36.8 96
Granite Creek 6770 6.7 5.4 124 19.2 21.3 90
Grassy Lake 7265 22.5 22.6 100 38.2 39.4 97
Gros Ventre Summit 8750 8.9 9.8 91 -M 14.9 *
Gunsight Pass 9820 12.8 12.4 103 17.7 17.1 104
Lewis Lake Divide 7850 26.4 29.8 89 38.8 38.4 101
Loomis Park 8240 6.0 7.7 78 18.0 19.5 92
Phillips Bench 8200 25.4 23.6 108 33.4 29.4 114
Salt River Summit 7640 6.3 4.5 140 16.4 18.8 87
Snake River Station 6920 5.9 3.3 179 25.0 26.0 96
Somsen Ranch 6800 5.1 .0 * 23.6 19.1 124
Spring Creek Divide 9000 25.2 24.0 105 25.9 26.8 97
Thumb Divide 7980 12.0 8.0 150 20.5 22.2 92
Togwotee Pass 9580 22.6 25.8 88 24.5 28.6 86
Triple Peak 8500 19.3 16.8 115 29.8 29.6 101
Two Ocean Plateau 9240 31.7 33.1 96 30.3 30.5 99
Willow Creek 8080 28.1 23.6 119 40.2 39.1 103
Younts Peak 8350 9.8 12.6 78 17.9 17.8 101
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Basin Index (%) 104 99
MADISON HEADWATERS IN WYOMING
Black Bear 8170 34.2 41.0 83 41.6 41.6 100
Canyon 7870 8.6 -M * 15.7 -M *
Madison Plateau 7750 18.3 22.2 82 25.8 29.6 87
West Yellowstone 6700 .0 .0 * 14.9 16.2 92
Whiskey Creek 6800 8.8 10.4 85 21.7 23.0 94
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Basin Index (%) 83 94
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.8 24.8 84 20.7 24.4 85
Canyon 7870 8.6 -M * 15.7 -M *
Evening Star 9200 21.7 27.0 80 30.8 33.1 93
Fisher Creek 9100 26.5 36.2 73 31.7 38.7 82
Monument Peak 8850 17.7 21.6 82 23.9 26.4 91
Northeast Entrance 7350 .6 .0 * 13.8 15.1 91
Parker Peak 9400 23.1 23.8 97 26.8 23.4 115
Sylvan Lake 8420 13.2 18.0 73 26.8 27.4 98
Thumb Divide 7980 12.0 8.0 150 20.5 22.2 92
Two Ocean Plateau 9240 31.7 33.1 96 30.3 30.5 99
White Mill 8700 20.4 26.5 77 22.2 26.4 84
Wolverine 7650 .4 .0 * 16.0 14.4 111
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Basin Index (%) 86 93
WIND RIVER
Burroughs Creek 8750 6.7 -M * 14.0 -M *
Castle Creek 8400 .2 .0 * 10.1 10.8 94
Cold Springs 9630 4.0 1.6 250 14.8 12.6 117
Deer Park 9700 20.5 13.8 149 26.6 23.0 116
Hobbs Park 10100 21.8 15.8 138 23.7 17.6 135
Kirwin 9550 15.3 11.3 135 19.8 15.6 127
Little Warm 9370 9.6 7.5 128 17.3 14.4 120
South Pass 9040 16.5 12.7 130 23.2 19.2 121
St. Lawrence Alt 8620 1.2 -M * 14.6 -M *
Togwotee Pass 9580 22.6 25.8 88 24.5 28.6 86
Townsend Creek 8700 10.8 5.7 189 19.3 15.2 127
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Basin Index (%) 129 114
BIGHORN BASIN
Bald Mtn. 9380 19.7 21.0 94 17.9 19.7 91
Bear Trap Meadow 8200 1.5 .1 1500* 12.1 12.0 101
Bone Springs Div 9350 18.3 17.0 108 16.4 18.8 87
Grave Springs 8550 5.7 6.3 90 13.0 12.6 103
Kirwin 9550 15.3 11.3 135 19.8 15.6 127
Marquette 8760 17.7 8.4 211 22.1 13.2 167
Middle Powder 7760 13.6 9.4 145 13.8 13.3 104
Owl Creek 8975 .2 .8 25 11.8 9.0 131
Powder River Pass 9480 6.0 8.8 68 15.8 16.5 96
Shell Creek 9580 17.8 16.8 106 18.5 17.2 108
Timber Creek 7950 5.1 1.4 364 16.6 11.4 146
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Basin Index (%) 119 112
SHOSHONE RIVER
Blackwater 9780 25.5 25.2 101 28.0 26.7 105
Evening Star 9200 21.7 27.0 80 30.8 33.1 93
Marquette 8760 17.7 8.4 211 22.1 13.2 167
Sylvan Lake 8420 13.2 18.0 73 26.8 27.4 98
Sylvan Road 7120 .0 .0 * 17.2 19.0 91
Younts Peak 8350 9.8 12.6 78 17.9 17.8 101
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Basin Index (%) 96 104
POWDER RIVER
Bear Trap Meadow 8200 1.5 .1 1500* 12.1 12.0 101
Cloud Peak Reservoir 9860 16.4 16.0 102 20.8 18.4 113
Grave Springs 8550 5.7 6.3 90 13.0 12.6 103
Hansen Sawmill 8360 2.0 1.6 125 13.4 12.2 110
Middle Powder 7760 13.6 9.4 145 13.8 13.3 104
Powder River Pass 9480 6.0 8.8 68 15.8 16.5 96
Soldier Park 8720 1.6 .8 200 13.7 12.0 114
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Basin Index (%) 109 106
TONGUE RIVER
Big Goose 7990 8.7 8.4 104 16.6 14.5 114
Bone Springs Div 9350 18.3 17.0 108 16.4 18.8 87
Burgess Junction 7880 11.0 10.9 101 17.0 15.7 108
Dome Lake 8880 11.4 11.0 104 17.8 17.6 101
Little Goose 8870 12.2 9.4 130 19.6 16.4 120
Sucker Creek 8880 12.3 12.4 99 21.2 18.8 113
Tie Creek 6870 1.8 .6 300 16.4 15.0 109
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Basin Index (%) 109 107
BELLE FOURCHE
Blind Park 6890 1.9 .0 * 11.9 14.1 84
Cole Canyon 5910 1.6 .0 * 12.1 13.4 90
North Rapid Creek 6130 .0 .0 * 12.0 12.0 100
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Basin Index (%) * 91
CHEYENNE RIVER BASIN
Blind Park 6890 1.9 .0 * 11.9 14.1 84
North Rapid Creek 6130 .0 .0 * 12.0 12.0 100
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Basin Index (%) * 92
UPPER N. PLATTE
Arapaho Ridge 10976 23.8 22.0 108 27.2 26.7 102
Blackhall Mtn 9839 38.2 33.0 116 41.8 37.1 113
Cinnabar Park 9707 19.2 18.0 107 27.6 27.8 99
Columbine 9167 15.0 12.9 116 30.8 30.2 102
Divide Peak 8730 17.0 12.4 137 29.5 25.4 116
Joe Wright 10158 23.6 22.6 104 31.6 32.0 99
Laprele Creek 8390 4.9 1.6 306 16.9 15.6 108
Med Bow 10512 45.0 -M * 40.1 -M *
Never Summer 10323 25.2 22.0 115 20.5 20.8 99
North French Creek 10153 31.5 32.2 98 33.8 34.8 97
Old Battle 9860 36.7 36.4 101 40.1 40.6 99
Rawah 9069 10.3 3.6 286 21.2 20.2 105
Sage Creek Basin 7850 .8 .0 * 19.0 15.7 121
Sand Lake 10098 36.9 32.4 114 36.7 31.5 117
South Brush Creek 8495 5.8 1.6 362 16.0 17.7 90
Tower 10620 47.7 48.2 99 48.1 47.4 101
Webber Springs 9260 21.5 18.0 119 30.7 31.2 98
Whiskey Park 9020 28.9 26.7 108 35.2 34.8 101
Willow Creek Pass 9523 16.2 14.4 112 18.7 16.8 111
Zirkel 9338 17.6 19.6 90 34.6 35.4 98
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Basin Index (%) 111 103
SWEETWATER
Deer Park 9700 20.5 13.8 149 26.6 23.0 116
Larsen Creek 9000 -M .1 * 16.8 16.5 102
South Pass 9040 16.5 12.7 130 23.2 19.2 121
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Basin Index (%) 140 113
LOWER N. PLATTE
Casper Mtn. 7920 11.6 10.0 116 21.4 18.2 118
Laprele Creek 8390 4.9 1.6 306 16.9 15.6 108
Reno Hill 8430 12.1 11.4 106 21.6 21.2 102
Windy Peak 7915 5.9 .8 738 15.0 14.2 106
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Basin Index (%) 145 108
LARAMIE RIVER
Brooklyn Lake 10250 24.4 21.0 116 31.4 26.9 117
Cinnabar Park 9707 19.2 18.0 107 27.6 27.8 99
Crow Creek 8335 .0 .0 * 13.0 13.7 95
Deadman Hill 10239 23.4 19.2 122 23.7 22.6 105
Rawah 9069 10.3 3.6 286 21.2 20.2 105
Roach 9740 13.8 15.3 90 21.8 22.6 96
Windy Peak 7915 5.9 .8 738 15.0 14.2 106
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Basin Index (%) 125 104
S. PLATTE
Crow Creek 8335 .0 .0 * 13.0 13.7 95
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Basin Index (%) * 95
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 22.1 18.1 122
Divide Peak 8730 17.0 12.4 137 29.5 25.4 116
Elk River 8739 7.8 7.1 110 23.5 23.3 101
Elkhead Divide 8800 16.3 -M * 27.8 -M *
Little Snake River 8928 25.4 21.3 119 39.6 38.0 104
Old Battle 9860 36.7 36.4 101 40.1 40.6 99
Sage Creek Basin 7850 .8 .0 * 19.0 15.7 121
Sandstone RS 8152 6.5 1.6 406 21.9 20.4 107
Whiskey Park 9020 28.9 26.7 108 35.2 34.8 101
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Basin Index (%) 117 107
UPPER GREEN RIVER
Big Sandy Opening 9080 11.1 9.2 121 17.4 15.7 111
Blind Bull Sum 8650 27.3 24.2 113 19.6 20.0 98
East Rim Divide 7930 .0 1.4 0 13.3 13.2 101
Elkhart Park G.S. 9400 8.3 9.8 85 14.4 14.8 97
Gros Ventre Summit 8750 8.9 9.8 91 -M 14.9 *
Gunsight Pass 9820 12.8 12.4 103 17.7 17.1 104
Indian Creek 9425 23.7 20.8 114 23.8 22.8 104
Kendall R.S. 7740 .0 .0 * 15.3 15.2 101
Larsen Creek 9000 -M .1 * 16.8 16.5 102
Loomis Park 8240 6.0 7.7 78 18.0 19.5 92
New Fork Lake 8340 .4 2.8 14 -M 12.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 2.9 4.6 63 16.0 15.8 101
Spring Creek Divide 9000 25.2 24.0 105 25.9 26.8 97
Triple Peak 8500 19.3 16.8 115 29.8 29.6 101
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Basin Index (%) 102 100
LOWER GREEN RIVER
Blacks Fork Jct 8869 2.5 .0 * 17.1 14.9 115
Buck Pasture 9632 12.5 -M * 20.9 -M *
EF Blacks Fork GS 9360 5.4 4.4 123 13.6 14.4 94
Hams Fork 7840 -M .0 * 13.8 13.4 103
Henrys Fork 10182 -M -M * 17.4 -M *
Hewinta 9500 5.9 1.4 421 18.5 16.6 111
Hickerson Park 9122 1.1 .0 * 16.5 12.8 129
Hole-in-Rock 9168 1.0 .0 * 14.0 12.7 110
Indian Creek 9425 23.7 20.8 114 23.8 22.8 104
Kelley R.S. 8180 11.1 8.4 132 20.8 19.0 109
Spirit Lk 10235 11.3 10.6 107 22.9 20.0 114
Steel Creek Park 10158 17.8 17.6 101 22.4 19.9 113
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Basin Index (%) 126 110
UPPER BEAR RIVER
Bear River RS 8777 .7 .0 * 17.1 14.2 120
Bug Lake 7987 15.2 11.9 128 26.2 20.0 131
Burts Miller Ranch 8000 .0 .0 * 14.1 8.8 160
Chalk Creek #1 9171 20.5 19.6 105 29.4 27.2 108
Giveout 6930 .0 .0 * 14.9 14.8 101
Hayden Fork 9130 6.1 4.7 130 27.5 24.2 114
Kelley R.S. 8180 11.1 8.4 132 20.8 19.0 109
Lily Lake 9133 9.2 6.0 153 19.1 19.6 97
Monte Cristo 8932 28.4 21.0 135 34.0 28.8 118
Salt River Summit 7640 6.3 4.5 140 16.4 18.8 87
Spring Creek Divide 9000 25.2 24.0 105 25.9 26.8 97
Trial Lake 9992 28.4 21.0 135 31.3 26.3 119
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Basin Index (%) 125 111
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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.