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 MONDAY: MAY 20 , 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 * 24.0 24.6 98
Blind Bull Sum 8650 26.0 21.2 123 19.8 21.0 94
Cottonwood Creek 7670 6.3 7.9 80 31.5 30.0 105
East Rim Divide 7930 -M .0 * 13.5 14.0 96
Grand Targhee 9260 38.0 43.4 88 36.8 38.4 96
Granite Creek 6770 -M .0 * 20.4 22.6 90
Grassy Lake 7265 13.0 15.5 84 38.4 41.4 93
Gros Ventre Summit 8750 2.6 5.4 48 -M 15.6 *
Gunsight Pass 9820 8.1 10.0 81 18.1 17.4 104
Lewis Lake Divide 7850 16.5 21.9 75 39.2 39.3 100
Loomis Park 8240 .1 1.6 6 18.1 20.6 88
Phillips Bench 8200 19.5 19.4 101 33.8 31.2 108
Salt River Summit 7640 -M .0 * 16.9 19.0 89
Snake River Station 6920 -M .0 * 25.2 26.8 94
Somsen Ranch 6800 -M .0 * 23.9 19.8 121
Spring Creek Divide 9000 20.5 20.8 99 26.1 28.0 93
Thumb Divide 7980 2.3 .4 575* 20.8 22.4 93
Togwotee Pass 9580 18.0 22.8 79 25.2 29.2 86
Triple Peak 8500 10.7 10.4 103 29.8 30.6 97
Two Ocean Plateau 9240 26.1 29.4 89 30.8 31.2 99
Willow Creek 8080 16.8 17.5 96 40.4 40.2 100
Younts Peak 8350 .2 8.2 2 18.5 18.8 98
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Basin Index (%) 88 97
MADISON HEADWATERS IN WYOMING
Black Bear 8170 28.0 34.9 80 41.9 43.0 97
Canyon 7870 2.0 -M * 15.9 -M *
Madison Plateau 7750 11.5 14.4 80 26.2 30.6 86
West Yellowstone 6700 -M .0 * 15.1 17.0 89
Whiskey Creek 6800 2.8 5.1 55 21.7 24.6 88
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Basin Index (%) 78 91
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 18.6 22.9 81 21.0 25.4 83
Canyon 7870 2.0 -M * 15.9 -M *
Evening Star 9200 16.1 22.8 71 30.9 34.0 91
Fisher Creek 9100 23.6 35.6 66 32.4 40.9 79
Monument Peak 8850 13.4 18.0 74 24.4 27.4 89
Northeast Entrance 7350 .0 .0 * 14.6 16.2 90
Parker Peak 9400 19.0 18.8 101 27.1 24.4 111
Sylvan Lake 8420 6.3 12.9 49 27.4 28.0 98
Thumb Divide 7980 2.3 .4 575* 20.8 22.4 93
Two Ocean Plateau 9240 26.1 29.4 89 30.8 31.2 99
White Mill 8700 16.2 23.0 70 22.7 27.6 82
Wolverine 7650 .0 .0 * 16.0 15.5 103
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Basin Index (%) 77 92
WIND RIVER
Burroughs Creek 8750 .1 -M * 13.9 -M *
Castle Creek 8400 .0 .0 * 10.2 11.8 86
Cold Springs 9630 .0 .0 * 14.8 13.6 109
Deer Park 9700 16.2 10.2 159 27.0 23.9 113
Hobbs Park 10100 19.1 14.3 134 24.2 19.0 127
Kirwin 9550 8.5 8.8 97 20.0 17.2 116
Little Warm 9370 3.1 2.3 135 17.5 15.7 111
South Pass 9040 10.9 8.0 136 23.5 20.6 114
St. Lawrence Alt 8620 -M -M * 14.8 -M *
Togwotee Pass 9580 18.0 22.8 79 25.2 29.2 86
Townsend Creek 8700 5.4 .8 675* 19.7 16.1 122
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Basin Index (%) 121 109
BIGHORN BASIN
Bald Mtn. 9380 17.7 18.8 94 18.7 20.4 92
Bear Trap Meadow 8200 -M .0 * 13.3 12.8 104
Bone Springs Div 9350 15.5 14.2 109 16.8 19.6 86
Grave Springs 8550 1.1 2.3 48 14.4 13.4 107
Kirwin 9550 8.5 8.8 97 20.0 17.2 116
Marquette 8760 12.3 3.6 342 22.8 15.4 148
Middle Powder 7760 7.5 4.0 188 15.2 14.2 107
Owl Creek 8975 -M .0 * 12.2 9.8 124
Powder River Pass 9480 2.5 5.6 45 16.5 17.4 95
Shell Creek 9580 15.0 14.4 104 18.8 17.8 106
Timber Creek 7950 2.2 .0 * 17.0 12.5 136
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Basin Index (%) 115 109
SHOSHONE RIVER
Blackwater 9780 23.2 22.9 101 28.3 28.2 100
Evening Star 9200 16.1 22.8 71 30.9 34.0 91
Marquette 8760 12.3 3.6 342 22.8 15.4 148
Sylvan Lake 8420 6.3 12.9 49 27.4 28.0 98
Sylvan Road 7120 -M .0 * 17.5 19.4 90
Younts Peak 8350 .2 8.2 2 18.5 18.8 98
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Basin Index (%) 83 101
POWDER RIVER
Bear Trap Meadow 8200 -M .0 * 13.3 12.8 104
Cloud Peak Reservoir 9860 15.2 12.8 119 22.3 20.0 112
Grave Springs 8550 1.1 2.3 48 14.4 13.4 107
Hansen Sawmill 8360 -M .0 * 13.8 13.2 105
Middle Powder 7760 7.5 4.0 188 15.2 14.2 107
Powder River Pass 9480 2.5 5.6 45 16.5 17.4 95
Soldier Park 8720 .0 .1 0* 14.3 13.1 109
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Basin Index (%) 106 105
TONGUE RIVER
Big Goose 7990 4.2 4.1 102 17.4 16.4 106
Bone Springs Div 9350 15.5 14.2 109 16.8 19.6 86
Burgess Junction 7880 6.6 6.6 100 17.6 16.7 105
Dome Lake 8880 -M 6.2 * 19.0 19.7 96
Little Goose 8870 8.6 6.3 137 20.5 17.7 116
Sucker Creek 8880 8.0 7.6 105 22.1 20.8 106
Tie Creek 6870 -M .0 * 17.2 17.0 101
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Basin Index (%) 111 102
BELLE FOURCHE
Blind Park 6890 .0 .0 * 12.5 15.1 83
Cole Canyon 5910 .0 .0 * 13.2 14.0 94
North Rapid Creek 6130 -M .0 * 12.7 13.2 96
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Basin Index (%) * 91
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 12.5 15.1 83
North Rapid Creek 6130 -M .0 * 12.7 13.2 96
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Basin Index (%) * 89
UPPER N. PLATTE
Arapaho Ridge 10976 21.5 19.6 110 27.5 28.4 97
Blackhall Mtn 9839 32.4 28.7 113 42.1 39.4 107
Cinnabar Park 9707 12.8 12.6 102 28.0 28.8 97
Columbine 9167 4.6 1.2 383* 31.2 31.1 100
Divide Peak 8730 6.5 5.2 125 29.8 25.8 116
Joe Wright 10158 19.6 19.2 102 32.1 33.6 96
Laprele Creek 8390 .0 .0 * 17.3 16.8 103
Med Bow 10512 -M -M * -M -M *
Never Summer 10323 23.0 20.0 115 20.9 22.2 94
North French Creek 10153 26.4 29.2 90 34.3 35.8 96
Old Battle 9860 33.4 32.6 102 40.8 42.0 97
Rawah 9069 3.4 .4 850* 21.2 20.2 105
Sage Creek Basin 7850 -M .0 * 19.2 16.7 115
Sand Lake 10098 34.6 27.6 125 37.1 32.4 115
South Brush Creek 8495 .2 .0 * 16.4 19.0 86
Tower 10620 43.8 43.2 101 48.7 49.4 99
Webber Springs 9260 15.6 11.2 139 31.4 32.2 98
Whiskey Park 9020 26.0 22.6 115 35.6 36.0 99
Willow Creek Pass 9523 11.4 10.8 106 18.9 17.7 107
Zirkel 9338 7.1 9.3 76 35.3 35.9 98
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Basin Index (%) 110 101
SWEETWATER
Deer Park 9700 16.2 10.2 159 27.0 23.9 113
Larsen Creek 9000 -M .0 * 16.8 16.8 100
South Pass 9040 10.9 8.0 136 23.5 20.6 114
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Basin Index (%) 149 110
LOWER N. PLATTE
Casper Mtn. 7920 4.7 3.0 157 22.3 18.8 119
Laprele Creek 8390 .0 .0 * 17.3 16.8 103
Reno Hill 8430 7.6 4.8 158 22.2 21.8 102
Windy Peak 7915 .1 .0 * 15.2 14.5 105
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Basin Index (%) 159 107
LARAMIE RIVER
Brooklyn Lake 10250 18.5 16.6 111 31.6 28.0 113
Cinnabar Park 9707 12.8 12.6 102 28.0 28.8 97
Crow Creek 8335 .0 .0 * 13.1 14.4 91
Deadman Hill 10239 18.2 16.2 112 23.9 24.0 100
Rawah 9069 3.4 .4 850* 21.2 20.2 105
Roach 9740 7.8 9.3 84 22.2 24.2 92
Windy Peak 7915 .1 .0 * 15.2 14.5 105
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Basin Index (%) 110 101
S. PLATTE
Crow Creek 8335 .0 .0 * 13.1 14.4 91
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Basin Index (%) * 91
LITTLE SNAKE RIVER
Battle Mountain 7498 .1 .0 * 22.3 19.2 116
Divide Peak 8730 6.5 5.2 125 29.8 25.8 116
Elk River 8739 .2 .0 * 23.9 23.7 101
Elkhead Divide 8800 7.5 -M * 28.1 -M *
Little Snake River 8928 16.4 12.8 128 40.1 39.6 101
Old Battle 9860 33.4 32.6 102 40.8 42.0 97
Sage Creek Basin 7850 -M .0 * 19.2 16.7 115
Sandstone RS 8152 .1 .0 * 22.3 21.7 103
Whiskey Park 9020 26.0 22.6 115 35.6 36.0 99
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Basin Index (%) 113 104
UPPER GREEN RIVER
Big Sandy Opening 9080 3.2 3.0 107 17.6 16.4 107
Blind Bull Sum 8650 26.0 21.2 123 19.8 21.0 94
East Rim Divide 7930 -M .0 * 13.5 14.0 96
Elkhart Park G.S. 9400 .7 5.4 13 14.2 16.2 88
Gros Ventre Summit 8750 2.6 5.4 48 -M 15.6 *
Gunsight Pass 9820 8.1 10.0 81 18.1 17.4 104
Indian Creek 9425 16.5 19.0 87 24.1 24.0 100
Kendall R.S. 7740 .0 .0 * 15.5 16.2 96
Larsen Creek 9000 -M .0 * 16.8 16.8 100
Loomis Park 8240 .1 1.6 6 18.1 20.6 88
New Fork Lake 8340 -M .0 * -M 13.7 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 16.3 16.2 101
Spring Creek Divide 9000 20.5 20.8 99 26.1 28.0 93
Triple Peak 8500 10.7 10.4 103 29.8 30.6 97
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Basin Index (%) 91 97
LOWER GREEN RIVER
Blacks Fork Jct 8869 .4 .0 * 17.2 15.2 113
Buck Pasture 9632 6.0 -M * 21.4 -M *
EF Blacks Fork GS 9360 1.5 .0 * 14.1 15.8 89
Hams Fork 7840 -M .0 * 14.0 14.1 99
Henrys Fork 10182 -M -M * 17.9 -M *
Hewinta 9500 -M .0 * 18.6 17.2 108
Hickerson Park 9122 -M .0 * 16.4 13.2 124
Hole-in-Rock 9168 -M .0 * 14.2 13.4 106
Indian Creek 9425 16.5 19.0 87 24.1 24.0 100
Kelley R.S. 8180 2.4 2.1 114 21.0 20.4 103
Spirit Lk 10235 5.9 3.1 190 23.1 20.5 113
Steel Creek Park 10158 14.5 14.4 101 22.6 21.0 108
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Basin Index (%) 107* 106
UPPER BEAR RIVER
Bear River RS 8777 -M .0 * 17.3 14.6 118
Bug Lake 7987 4.4 5.2 85 26.3 20.3 130
Burts Miller Ranch 8000 .2 .0 * 14.4 9.4 153
Chalk Creek #1 9171 11.9 12.8 93 29.8 28.8 103
Giveout 6930 -M .0 * 15.1 15.7 96
Hayden Fork 9130 -M .0 * 27.8 24.8 112
Kelley R.S. 8180 2.4 2.1 114 21.0 20.4 103
Lily Lake 9133 1.6 .0 * 19.2 20.4 94
Monte Cristo 8932 18.9 15.0 126 34.2 29.8 115
Salt River Summit 7640 -M .0 * 16.9 19.0 89
Spring Creek Divide 9000 20.5 20.8 99 26.1 28.0 93
Trial Lake 9992 20.6 14.8 139 31.5 27.0 117
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Basin Index (%) 114 108
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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.