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 SATURDAY: MAY 18 , 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 -M .0 * 23.9 24.4 98
Blind Bull Sum 8650 28.7 22.5 128 19.8 20.8 95
Cottonwood Creek 7670 8.4 9.2 91 31.5 30.0 105
East Rim Divide 7930 -M .0 * 13.5 13.9 97
Grand Targhee 9260 40.3 44.0 92 36.8 37.8 97
Granite Creek 6770 -M .5 * 20.0 22.4 89
Grassy Lake 7265 15.0 18.3 82 38.4 41.2 93
Gros Ventre Summit 8750 4.4 6.8 65 -M 15.4 *
Gunsight Pass 9820 9.5 11.0 86 18.1 17.4 104
Lewis Lake Divide 7850 18.6 22.8 82 39.1 39.2 100
Loomis Park 8240 .4 3.9 10 18.1 20.5 88
Phillips Bench 8200 21.1 20.4 103 33.8 31.0 109
Salt River Summit 7640 -M .0 * 16.8 18.9 89
Snake River Station 6920 -M .0 * 25.2 26.8 94
Somsen Ranch 6800 -M .0 * 24.0 19.6 122
Spring Creek Divide 9000 21.8 21.1 103 26.1 27.6 95
Thumb Divide 7980 4.2 2.2 191 20.8 22.3 93
Togwotee Pass 9580 19.4 23.2 84 25.2 29.0 87
Triple Peak 8500 12.8 12.0 107 29.9 30.3 99
Two Ocean Plateau 9240 27.3 30.4 90 30.8 31.2 99
Willow Creek 8080 19.3 18.6 104 40.4 40.2 100
Younts Peak 8350 1.0 8.8 11 18.5 18.4 101
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Basin Index (%) 92 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 29.0 36.0 81 41.8 42.8 98
Canyon 7870 2.9 -M * 15.9 -M *
Madison Plateau 7750 12.4 15.8 78 26.2 30.6 86
West Yellowstone 6700 -M .0 * 15.1 16.8 90
Whiskey Creek 6800 3.9 6.0 65 21.6 24.4 89
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Basin Index (%) 78 91
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 19.0 23.7 80 20.9 25.2 83
Canyon 7870 2.9 -M * 15.9 -M *
Evening Star 9200 17.0 24.0 71 30.8 33.8 91
Fisher Creek 9100 23.3 36.0 65 31.9 40.9 78
Monument Peak 8850 13.9 19.6 71 24.2 27.2 89
Northeast Entrance 7350 .0 .0 * 14.3 16.2 88
Parker Peak 9400 20.0 19.8 101 27.0 24.0 112
Sylvan Lake 8420 8.1 13.7 59 27.4 28.0 98
Thumb Divide 7980 4.2 2.2 191 20.8 22.3 93
Two Ocean Plateau 9240 27.3 30.4 90 30.8 31.2 99
White Mill 8700 16.4 24.0 68 22.4 27.6 81
Wolverine 7650 -M .0 * 15.9 15.4 103
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Basin Index (%) 77 91
WIND RIVER
Burroughs Creek 8750 .3 -M * 13.9 -M *
Castle Creek 8400 .0 .0 * 10.2 11.8 86
Cold Springs 9630 .0 .0 * 14.8 13.5 110
Deer Park 9700 17.8 11.4 156 26.9 23.5 114
Hobbs Park 10100 20.6 15.4 134 24.2 18.8 129
Kirwin 9550 10.4 10.1 103 20.0 16.6 120
Little Warm 9370 5.0 4.2 119 17.5 15.5 113
South Pass 9040 13.1 9.2 142 23.5 20.2 116
St. Lawrence Alt 8620 -M -M * 14.8 -M *
Togwotee Pass 9580 19.4 23.2 84 25.2 29.0 87
Townsend Creek 8700 7.6 1.6 475 19.7 15.7 125
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Basin Index (%) 125 111
BIGHORN BASIN
Bald Mtn. 9380 18.6 19.2 97 18.6 20.3 92
Bear Trap Meadow 8200 -M .0 * 13.3 12.6 106
Bone Springs Div 9350 16.2 15.1 107 16.8 19.5 86
Grave Springs 8550 3.0 4.4 68 14.4 13.3 108
Kirwin 9550 10.4 10.1 103 20.0 16.6 120
Marquette 8760 13.8 4.9 282 22.8 15.1 151
Middle Powder 7760 9.1 4.8 190 15.3 14.0 109
Owl Creek 8975 -M .0 * 12.2 9.6 127
Powder River Pass 9480 4.2 7.2 58 16.5 17.4 95
Shell Creek 9580 15.8 15.0 105 18.8 17.6 107
Timber Creek 7950 2.4 .0 * 17.0 12.2 139
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Basin Index (%) 116 110
SHOSHONE RIVER
Blackwater 9780 23.7 23.0 103 28.3 27.8 102
Evening Star 9200 17.0 24.0 71 30.8 33.8 91
Marquette 8760 13.8 4.9 282 22.8 15.1 151
Sylvan Lake 8420 8.1 13.7 59 27.4 28.0 98
Sylvan Road 7120 -M .0 * 17.5 19.3 91
Younts Peak 8350 1.0 8.8 11 18.5 18.4 101
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Basin Index (%) 85 102
POWDER RIVER
Bear Trap Meadow 8200 -M .0 * 13.3 12.6 106
Cloud Peak Reservoir 9860 16.3 14.6 112 22.2 19.7 113
Grave Springs 8550 3.0 4.4 68 14.4 13.3 108
Hansen Sawmill 8360 -M .1 * 13.9 13.2 105
Middle Powder 7760 9.1 4.8 190 15.3 14.0 109
Powder River Pass 9480 4.2 7.2 58 16.5 17.4 95
Soldier Park 8720 .1 .0 * 14.3 12.8 112
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Basin Index (%) 105 107
TONGUE RIVER
Big Goose 7990 5.4 5.7 95 17.4 16.3 107
Bone Springs Div 9350 16.2 15.1 107 16.8 19.5 86
Burgess Junction 7880 7.4 8.2 90 17.5 16.5 106
Dome Lake 8880 -M 7.6 * 18.8 19.5 96
Little Goose 8870 9.5 7.4 128 20.5 17.6 116
Sucker Creek 8880 9.2 8.6 107 22.0 20.6 107
Tie Creek 6870 -M .0 * 17.2 16.4 105
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Basin Index (%) 106 103
BELLE FOURCHE
Blind Park 6890 .0 .0 * 12.5 14.8 84
Cole Canyon 5910 .0 .0 * 13.2 14.0 94
North Rapid Creek 6130 -M .0 * 12.6 12.7 99
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Basin Index (%) * 92
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 12.5 14.8 84
North Rapid Creek 6130 -M .0 * 12.6 12.7 99
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Basin Index (%) * 91
UPPER N. PLATTE
Arapaho Ridge 10976 -M 19.3 * -M 28.2 *
Blackhall Mtn 9839 33.9 27.5 123 41.8 39.2 107
Cinnabar Park 9707 14.5 14.0 104 27.7 27.9 99
Columbine 9167 7.2 3.8 189 31.1 31.0 100
Divide Peak 8730 9.3 6.4 145 29.6 25.8 115
Joe Wright 10158 21.0 20.2 104 31.9 33.1 96
Laprele Creek 8390 .6 .0 * 17.3 16.4 105
Med Bow 10512 42.6 -M * 40.4 -M *
Never Summer 10323 24.0 20.4 118 20.8 21.9 95
North French Creek 10153 27.9 30.8 91 34.1 35.7 96
Old Battle 9860 34.7 34.0 102 40.5 41.6 97
Rawah 9069 5.1 .2 2550* 21.2 20.2 105
Sage Creek Basin 7850 -M .0 * 19.1 16.4 116
Sand Lake 10098 35.9 29.0 124 37.0 31.6 117
South Brush Creek 8495 .2 .0 * 16.3 19.0 86
Tower 10620 45.1 45.4 99 48.5 49.0 99
Webber Springs 9260 18.3 11.9 154 31.0 32.0 97
Whiskey Park 9020 28.8 23.2 124 35.3 35.5 99
Willow Creek Pass 9523 12.7 11.0 115 18.8 17.6 107
Zirkel 9338 9.9 10.2 97 34.9 35.6 98
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Basin Index (%) 114 101
SWEETWATER
Deer Park 9700 17.8 11.4 156 26.9 23.5 114
Larsen Creek 9000 -M .0 * 16.7 16.6 101
South Pass 9040 13.1 9.2 142 23.5 20.2 116
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Basin Index (%) 150 111
LOWER N. PLATTE
Casper Mtn. 7920 7.2 3.8 189 22.4 18.8 119
Laprele Creek 8390 .6 .0 * 17.3 16.4 105
Reno Hill 8430 9.6 7.9 122 22.2 21.6 103
Windy Peak 7915 .3 .0 * 15.2 14.4 106
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Basin Index (%) 151 108
LARAMIE RIVER
Brooklyn Lake 10250 20.3 18.0 113 31.5 27.5 115
Cinnabar Park 9707 14.5 14.0 104 27.7 27.9 99
Crow Creek 8335 .0 .0 * 13.0 14.0 93
Deadman Hill 10239 20.3 17.3 117 23.9 23.8 100
Rawah 9069 5.1 .2 2550* 21.2 20.2 105
Roach 9740 9.6 10.4 92 22.0 24.2 91
Windy Peak 7915 .3 .0 * 15.2 14.4 106
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Basin Index (%) 117 102
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 .1 .0 * 22.2 18.6 119
Divide Peak 8730 9.3 6.4 145 29.6 25.8 115
Elk River 8739 .1 .2 50* 23.5 23.7 99
Elkhead Divide 8800 9.8 -M * 28.0 -M *
Little Snake River 8928 18.8 13.1 144 39.7 39.4 101
Old Battle 9860 34.7 34.0 102 40.5 41.6 97
Sage Creek Basin 7850 -M .0 * 19.1 16.4 116
Sandstone RS 8152 .1 .0 * 22.1 21.6 102
Whiskey Park 9020 28.8 23.2 124 35.3 35.5 99
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Basin Index (%) 120 104
UPPER GREEN RIVER
Big Sandy Opening 9080 5.1 5.6 91 17.4 16.0 109
Blind Bull Sum 8650 28.7 22.5 128 19.8 20.8 95
East Rim Divide 7930 -M .0 * 13.5 13.9 97
Elkhart Park G.S. 9400 2.9 6.8 43 14.3 16.0 89
Gros Ventre Summit 8750 4.4 6.8 65 -M 15.4 *
Gunsight Pass 9820 9.5 11.0 86 18.1 17.4 104
Indian Creek 9425 18.6 20.0 93 24.1 23.8 101
Kendall R.S. 7740 .0 .0 * 15.5 16.0 97
Larsen Creek 9000 -M .0 * 16.7 16.6 101
Loomis Park 8240 .4 3.9 10 18.1 20.5 88
New Fork Lake 8340 -M .0 * -M 13.7 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 16.3 16.1 101
Spring Creek Divide 9000 21.8 21.1 103 26.1 27.6 95
Triple Peak 8500 12.8 12.0 107 29.9 30.3 99
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Basin Index (%) 95 98
LOWER GREEN RIVER
Blacks Fork Jct 8869 .5 .0 * 17.3 15.1 115
Buck Pasture 9632 8.4 -M * 21.3 -M *
EF Blacks Fork GS 9360 1.8 .0 * 14.0 15.1 93
Hams Fork 7840 -M .0 * 14.0 14.0 100
Henrys Fork 10182 -M -M * 17.8 -M *
Hewinta 9500 -M .0 * 18.6 17.1 109
Hickerson Park 9122 -M .0 * 16.5 13.2 125
Hole-in-Rock 9168 -M .0 * 14.2 13.4 106
Indian Creek 9425 18.6 20.0 93 24.1 23.8 101
Kelley R.S. 8180 4.7 2.9 162 21.0 20.0 105
Spirit Lk 10235 8.8 4.3 205 23.0 20.2 114
Steel Creek Park 10158 16.1 15.1 107 22.7 21.0 108
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Basin Index (%) 119* 107
UPPER BEAR RIVER
Bear River RS 8777 -M .0 * 17.3 14.4 120
Bug Lake 7987 7.3 7.2 101 26.4 20.2 131
Burts Miller Ranch 8000 .2 .0 * 14.4 9.4 153
Chalk Creek #1 9171 -M 14.4 * -M 28.5 *
Giveout 6930 -M .0 * 15.2 15.3 99
Hayden Fork 9130 .2 .0 * 27.8 24.8 112
Kelley R.S. 8180 4.7 2.9 162 21.0 20.0 105
Lily Lake 9133 4.3 .0 * 19.2 20.2 95
Monte Cristo 8932 22.1 16.7 132 34.1 29.8 114
Salt River Summit 7640 -M .0 * 16.8 18.9 89
Spring Creek Divide 9000 21.8 21.1 103 26.1 27.6 95
Trial Lake 9992 23.0 17.3 133 31.4 27.0 116
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Basin Index (%) 128* 110
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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.