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 15 , 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 2.6 2.4 108 24.0 24.2 99
Blind Bull Sum 8650 27.3 23.7 115 19.8 20.6 96
Cottonwood Creek 7670 11.5 10.8 106 31.4 30.0 105
East Rim Divide 7930 .0 .0 * 13.5 13.7 99
Grand Targhee 9260 40.9 45.2 90 36.7 37.3 98
Granite Creek 6770 2.3 2.8 82 19.6 21.8 90
Grassy Lake 7265 18.0 19.7 91 38.4 40.2 96
Gros Ventre Summit 8750 6.4 8.7 74 -M 15.2 *
Gunsight Pass 9820 11.0 11.8 93 18.1 17.4 104
Lewis Lake Divide 7850 21.9 25.2 87 39.2 39.1 100
Loomis Park 8240 3.1 5.8 53 18.1 20.2 90
Phillips Bench 8200 23.2 22.0 105 33.8 30.6 110
Salt River Summit 7640 1.9 .6 317* 16.7 18.9 88
Snake River Station 6920 .0 .0 * 25.3 26.3 96
Somsen Ranch 6800 -M .0 * 23.9 19.4 123
Spring Creek Divide 9000 23.5 22.8 103 26.1 27.4 95
Thumb Divide 7980 7.5 5.2 144 20.8 22.2 94
Togwotee Pass 9580 21.3 24.0 89 25.0 28.8 87
Triple Peak 8500 15.9 14.8 107 30.0 30.0 100
Two Ocean Plateau 9240 29.7 32.3 92 30.8 31.0 99
Willow Creek 8080 23.6 20.6 115 40.4 40.0 101
Younts Peak 8350 4.5 10.4 43 18.2 18.0 101
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Basin Index (%) 96 99
MADISON HEADWATERS IN WYOMING
Black Bear 8170 30.8 38.2 81 41.9 42.2 99
Canyon 7870 5.3 -M * 15.8 -M *
Madison Plateau 7750 15.1 18.9 80 25.9 30.6 85
West Yellowstone 6700 -M .0 * 15.1 16.4 92
Whiskey Creek 6800 5.9 8.4 70 21.8 24.2 90
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Basin Index (%) 79 92
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 19.9 24.0 83 20.9 24.8 84
Canyon 7870 5.3 -M * 15.8 -M *
Evening Star 9200 19.0 25.5 75 30.9 33.6 92
Fisher Creek 9100 24.6 36.4 68 32.0 40.6 79
Monument Peak 8850 15.7 20.0 78 24.2 27.0 90
Northeast Entrance 7350 .0 .0 * 14.2 15.6 91
Parker Peak 9400 21.7 22.0 99 27.2 23.6 115
Sylvan Lake 8420 11.0 15.6 71 27.4 27.7 99
Thumb Divide 7980 7.5 5.2 144 20.8 22.2 94
Two Ocean Plateau 9240 29.7 32.3 92 30.8 31.0 99
White Mill 8700 18.3 25.4 72 22.3 27.1 82
Wolverine 7650 .0 .0 * 15.9 14.8 107
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Basin Index (%) 81 93
WIND RIVER
Burroughs Creek 8750 2.9 -M * 13.9 -M *
Castle Creek 8400 .1 .0 * 10.2 11.0 93
Cold Springs 9630 .7 .6 117* 14.9 13.4 111
Deer Park 9700 19.3 13.2 146 26.9 23.4 115
Hobbs Park 10100 21.7 16.5 132 24.1 18.6 130
Kirwin 9550 13.0 11.0 118 20.0 16.0 125
Little Warm 9370 7.1 6.4 111 17.6 15.0 117
South Pass 9040 14.9 11.6 128 23.5 19.6 120
St. Lawrence Alt 8620 .0 -M * 14.8 -M *
Togwotee Pass 9580 21.3 24.0 89 25.0 28.8 87
Townsend Creek 8700 9.4 2.5 376 19.7 15.6 126
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Basin Index (%) 125 113
BIGHORN BASIN
Bald Mtn. 9380 19.7 20.4 97 18.8 20.3 93
Bear Trap Meadow 8200 -M .0 * 13.3 12.5 106
Bone Springs Div 9350 17.7 16.4 108 16.9 19.2 88
Grave Springs 8550 5.2 5.2 100 -M 13.1 *
Kirwin 9550 13.0 11.0 118 20.0 16.0 125
Marquette 8760 16.2 6.5 249 22.8 14.8 154
Middle Powder 7760 12.0 7.2 167 15.2 13.4 113
Owl Creek 8975 -M .0 * 12.2 9.5 128
Powder River Pass 9480 5.2 8.4 62 16.5 17.0 97
Shell Creek 9580 17.0 16.0 106 18.9 17.4 109
Timber Creek 7950 1.5 .0 * 17.1 12.0 142
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Basin Index (%) 118 113
SHOSHONE RIVER
Blackwater 9780 24.1 22.8 106 28.3 27.4 103
Evening Star 9200 19.0 25.5 75 30.9 33.6 92
Marquette 8760 16.2 6.5 249 22.8 14.8 154
Sylvan Lake 8420 11.0 15.6 71 27.4 27.7 99
Sylvan Road 7120 .0 .0 * 17.6 19.2 92
Younts Peak 8350 4.5 10.4 43 18.2 18.0 101
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Basin Index (%) 93 103
POWDER RIVER
Bear Trap Meadow 8200 -M .0 * 13.3 12.5 106
Cloud Peak Reservoir 9860 17.3 15.0 115 22.3 19.3 116
Grave Springs 8550 5.2 5.2 100 -M 13.1 *
Hansen Sawmill 8360 -M .0 * 13.9 12.8 109
Middle Powder 7760 12.0 7.2 167 15.2 13.4 113
Powder River Pass 9480 5.2 8.4 62 16.5 17.0 97
Soldier Park 8720 .4 .0 * 14.4 12.1 119
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Basin Index (%) 112 110
TONGUE RIVER
Big Goose 7990 7.6 6.7 113 17.4 15.8 110
Bone Springs Div 9350 17.7 16.4 108 16.9 19.2 88
Burgess Junction 7880 9.5 9.4 101 17.7 16.4 108
Dome Lake 8880 -M 9.2 * 18.8 18.8 100
Little Goose 8870 11.4 8.8 130 20.5 17.0 121
Sucker Creek 8880 11.3 10.0 113 22.1 19.4 114
Tie Creek 6870 .0 .0 * 17.2 16.0 108
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Basin Index (%) 112 107
BELLE FOURCHE
Blind Park 6890 .2 .0 * 12.4 14.5 86
Cole Canyon 5910 .1 .0 * 13.2 13.8 96
North Rapid Creek 6130 -M .0 * 12.4 12.5 99
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Basin Index (%) * 93
CHEYENNE RIVER BASIN
Blind Park 6890 .2 .0 * 12.4 14.5 86
North Rapid Creek 6130 -M .0 * 12.4 12.5 99
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Basin Index (%) * 92
UPPER N. PLATTE
Arapaho Ridge 10976 23.4 21.0 111 27.4 27.6 99
Blackhall Mtn 9839 36.1 29.7 122 41.8 38.9 107
Cinnabar Park 9707 16.9 15.2 111 27.7 27.9 99
Columbine 9167 11.2 7.6 147 31.1 30.8 101
Divide Peak 8730 13.4 10.0 134 29.6 25.6 116
Joe Wright 10158 23.3 21.0 111 31.9 32.6 98
Laprele Creek 8390 2.6 .0 * 17.0 16.2 105
Med Bow 10512 43.9 -M * 40.3 -M *
Never Summer 10323 24.7 21.5 115 20.8 21.8 95
North French Creek 10153 29.7 30.9 96 34.0 35.2 97
Old Battle 9860 36.0 35.6 101 40.4 41.4 98
Rawah 9069 7.5 .8 938* 21.2 20.2 105
Sage Creek Basin 7850 -M .0 * 19.1 16.1 119
Sand Lake 10098 36.7 31.0 118 37.0 31.6 117
South Brush Creek 8495 .5 .2 250* 16.2 18.6 87
Tower 10620 46.7 47.0 99 48.5 48.3 100
Webber Springs 9260 20.2 14.2 142 31.0 32.0 97
Whiskey Park 9020 28.5 24.4 117 35.3 35.2 100
Willow Creek Pass 9523 14.2 12.7 112 18.8 17.1 110
Zirkel 9338 13.4 14.3 94 34.9 35.6 98
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Basin Index (%) 114 102
SWEETWATER
Deer Park 9700 19.3 13.2 146 26.9 23.4 115
Larsen Creek 9000 -M .0 * 16.8 16.5 102
South Pass 9040 14.9 11.6 128 23.5 19.6 120
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Basin Index (%) 138 113
LOWER N. PLATTE
Casper Mtn. 7920 9.4 5.8 162 21.7 18.6 117
Laprele Creek 8390 2.6 .0 * 17.0 16.2 105
Reno Hill 8430 10.5 8.1 130 21.7 21.2 102
Windy Peak 7915 2.2 .0 * 15.0 14.3 105
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Basin Index (%) 178 107
LARAMIE RIVER
Brooklyn Lake 10250 23.0 19.5 118 31.4 27.2 115
Cinnabar Park 9707 16.9 15.2 111 27.7 27.9 99
Crow Creek 8335 .0 .0 * 13.0 14.0 93
Deadman Hill 10239 22.4 17.4 129 23.9 23.5 102
Rawah 9069 7.5 .8 938* 21.2 20.2 105
Roach 9740 11.9 12.7 94 22.0 23.4 94
Windy Peak 7915 2.2 .0 * 15.0 14.3 105
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Basin Index (%) 128 102
S. PLATTE
Crow Creek 8335 .0 .0 * 13.0 14.0 93
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Basin Index (%) * 93
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 22.2 18.5 120
Divide Peak 8730 13.4 10.0 134 29.6 25.6 116
Elk River 8739 3.2 1.6 200* 23.6 23.5 100
Elkhead Divide 8800 12.8 -M * 28.0 -M *
Little Snake River 8928 21.4 16.8 127 39.7 39.2 101
Old Battle 9860 36.0 35.6 101 40.4 41.4 98
Sage Creek Basin 7850 -M .0 * 19.1 16.1 119
Sandstone RS 8152 1.4 .0 * 22.1 21.2 104
Whiskey Park 9020 28.5 24.4 117 35.3 35.2 100
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Basin Index (%) 118 105
UPPER GREEN RIVER
Big Sandy Opening 9080 7.9 8.5 93 17.5 16.0 109
Blind Bull Sum 8650 27.3 23.7 115 19.8 20.6 96
East Rim Divide 7930 .0 .0 * 13.5 13.7 99
Elkhart Park G.S. 9400 5.5 9.0 61 14.3 15.7 91
Gros Ventre Summit 8750 6.4 8.7 74 -M 15.2 *
Gunsight Pass 9820 11.0 11.8 93 18.1 17.4 104
Indian Creek 9425 21.4 21.4 100 24.1 23.6 102
Kendall R.S. 7740 .0 .0 * 15.5 15.8 98
Larsen Creek 9000 -M .0 * 16.8 16.5 102
Loomis Park 8240 3.1 5.8 53 18.1 20.2 90
New Fork Lake 8340 -M .6 * -M 13.4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M 1.0 * 16.3 16.1 101
Spring Creek Divide 9000 23.5 22.8 103 26.1 27.4 95
Triple Peak 8500 15.9 14.8 107 30.0 30.0 100
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Basin Index (%) 96 99
LOWER GREEN RIVER
Blacks Fork Jct 8869 .8 .0 * 17.3 15.1 115
Buck Pasture 9632 11.1 -M * 21.2 -M *
EF Blacks Fork GS 9360 3.4 .5 680* 13.9 14.6 95
Hams Fork 7840 -M .0 * 14.0 14.0 100
Henrys Fork 10182 -M -M * 17.9 -M *
Hewinta 9500 3.5 .0 * 18.6 17.1 109
Hickerson Park 9122 -M .0 * 16.5 13.0 127
Hole-in-Rock 9168 -M .0 * 14.2 13.2 108
Indian Creek 9425 21.4 21.4 100 24.1 23.6 102
Kelley R.S. 8180 7.9 5.1 155 21.0 19.6 107
Spirit Lk 10235 10.4 6.7 155 23.1 20.0 116
Steel Creek Park 10158 17.4 15.8 110 22.7 20.8 109
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Basin Index (%) 131* 108
UPPER BEAR RIVER
Bear River RS 8777 -M .0 * 17.3 14.4 120
Bug Lake 7987 10.8 10.6 102 26.3 20.2 130
Burts Miller Ranch 8000 .1 .0 * 14.4 8.8 164
Chalk Creek #1 9171 18.6 17.6 106 29.7 27.8 107
Giveout 6930 .0 .0 * 15.1 15.0 101
Hayden Fork 9130 3.3 1.0 330* 27.8 24.4 114
Kelley R.S. 8180 7.9 5.1 155 21.0 19.6 107
Lily Lake 9133 7.3 1.3 562 19.3 20.0 96
Monte Cristo 8932 26.0 19.0 137 34.2 29.6 116
Salt River Summit 7640 1.9 .6 317* 16.7 18.9 88
Spring Creek Divide 9000 23.5 22.8 103 26.1 27.4 95
Trial Lake 9992 26.3 19.4 136 31.4 26.6 118
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Basin Index (%) 129 111
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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.