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 2 , 2022
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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 10.2 10.0 102 19.5 22.8 86
Blind Bull Sum 8650 23.0 24.6 93 16.2 19.4 84
Cottonwood Creek 7670 18.2 17.4 105 28.0 28.2 99
East Rim Divide 7930 2.8 6.1 46 12.3 12.5 98
Grand Targhee 9260 35.2 45.8 77 30.4 36.0 84
Granite Creek 6770 8.3 9.8 85 15.6 21.0 74
Grassy Lake 7265 23.8 28.4 84 34.2 38.4 89
Gros Ventre Summit 8750 11.8 12.0 98 12.5 14.5 86
Gunsight Pass 9820 14.5 13.0 112 16.4 16.2 101
Lewis Lake Divide 7850 24.8 30.2 82 34.5 36.8 94
Loomis Park 8240 9.9 11.6 85 17.7 18.4 96
Phillips Bench 8200 23.0 27.4 84 26.8 28.7 93
Salt River Summit 7640 10.6 8.1 131 17.9 17.8 101
Snake River Station 6920 8.1 9.3 87 20.5 24.8 83
Somsen Ranch 6800 5.9 .8 738* -M 18.2 *
Spring Creek Divide 9000 23.3 25.2 92 25.7 25.4 101
Thumb Divide 7980 15.2 12.7 120 20.0 20.8 96
Togwotee Pass 9580 23.0 25.4 91 24.4 27.0 90
Triple Peak 8500 21.1 19.1 110 28.9 28.4 102
Two Ocean Plateau 9240 32.2 32.2 100 28.5 29.4 97
Willow Creek 8080 26.9 27.6 97 36.6 37.1 99
Younts Peak 8350 14.8 13.8 107 12.2 17.3 71
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Basin Index (%) 94 92
MADISON HEADWATERS IN WYOMING
Black Bear 8170 30.6 39.9 77 33.4 40.7 82
Canyon 7870 10.8 -M * 14.3 -M *
Madison Plateau 7750 19.5 23.2 84 23.6 27.8 85
West Yellowstone 6700 2.6 .3 867* 14.6 15.8 92
Whiskey Creek 6800 12.6 13.3 95 19.4 22.6 86
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Basin Index (%) 85 85
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 19.7 23.9 82 18.9 22.8 83
Canyon 7870 10.8 -M * 14.3 -M *
Evening Star 9200 28.2 27.0 104 27.0 31.2 87
Fisher Creek 9100 32.0 35.4 90 34.2 37.0 92
Monument Peak 8850 19.9 22.3 89 24.0 25.4 94
Northeast Entrance 7350 3.7 3.0 123 13.0 14.6 89
Parker Peak 9400 23.0 24.0 96 22.7 22.6 100
Sylvan Lake 8420 16.6 19.6 85 24.0 26.2 92
Thumb Divide 7980 15.2 12.7 120 20.0 20.8 96
Two Ocean Plateau 9240 32.2 32.2 100 28.5 29.4 97
White Mill 8700 22.8 26.4 86 22.6 25.6 88
Wolverine 7650 9.3 4.6 202 14.3 13.8 104
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Basin Index (%) 96 93
WIND RIVER
Burroughs Creek 8750 10.0 -M * 16.3 -M *
Castle Creek 8400 2.6 .4 650* 9.5 9.6 99
Cold Springs 9630 7.1 4.1 173 14.5 11.3 128
Deer Park 9700 13.9 15.2 91 19.2 21.8 88
Hobbs Park 10100 16.9 16.8 101 18.5 16.5 112
Kirwin 9550 15.0 11.3 133 16.1 14.4 112
Little Warm 9370 12.4 9.4 132 16.6 13.2 126
South Pass 9040 12.0 14.8 81 16.0 18.2 88
St. Lawrence Alt 8620 .2 -M * 10.6 -M *
Togwotee Pass 9580 23.0 25.4 91 24.4 27.0 90
Townsend Creek 8700 9.2 9.0 102 14.6 13.6 107
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Basin Index (%) 105 103
BIGHORN BASIN
Bald Mtn. 9380 19.6 20.6 95 17.4 18.4 95
Bear Trap Meadow 8200 4.7 1.8 261 11.8 11.0 107
Bone Springs Div 9350 19.8 17.8 111 16.0 18.4 87
Grave Springs 8550 9.7 8.7 111 12.7 12.2 104
Kirwin 9550 15.0 11.3 133 16.1 14.4 112
Marquette 8760 7.8 8.0 98 11.7 12.2 96
Middle Powder 7760 13.1 11.2 117 12.7 12.4 102
Owl Creek 8975 2.6 1.0 260 9.7 8.3 117
Powder River Pass 9480 10.1 10.0 101 11.8 15.2 78
Shell Creek 9580 16.9 16.2 104 16.6 16.0 104
Timber Creek 7950 3.7 3.2 116 10.6 10.2 104
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Basin Index (%) 112 99
SHOSHONE RIVER
Blackwater 9780 24.5 25.6 96 25.4 25.6 99
Evening Star 9200 28.2 27.0 104 27.0 31.2 87
Marquette 8760 7.8 8.0 98 11.7 12.2 96
Sylvan Lake 8420 16.6 19.6 85 24.0 26.2 92
Sylvan Road 7120 .0 4.6 0 15.7 18.1 87
Younts Peak 8350 14.8 13.8 107 12.2 17.3 71
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Basin Index (%) 93 89
POWDER RIVER
Bear Trap Meadow 8200 4.7 1.8 261 11.8 11.0 107
Cloud Peak Reservoir 9860 16.8 16.2 104 18.4 17.1 108
Grave Springs 8550 9.7 8.7 111 12.7 12.2 104
Hansen Sawmill 8360 5.8 3.8 153 12.0 11.0 109
Middle Powder 7760 13.1 11.2 117 12.7 12.4 102
Powder River Pass 9480 10.1 10.0 101 11.8 15.2 78
Soldier Park 8720 5.7 3.8 150 12.6 11.4 111
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Basin Index (%) 119 102
TONGUE RIVER
Big Goose 7990 10.2 8.6 119 15.0 13.2 114
Bone Springs Div 9350 19.8 17.8 111 16.0 18.4 87
Burgess Junction 7880 14.8 11.7 126 17.3 14.8 117
Dome Lake 8880 15.6 11.4 137 17.6 16.0 110
Little Goose 8870 11.9 10.2 117 17.9 16.0 112
Sucker Creek 8880 15.4 12.2 126 21.0 17.2 122
Tie Creek 6870 5.2 2.2 236 16.3 13.8 118
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Basin Index (%) 125 111
BELLE FOURCHE
Blind Park 6890 .3 .3 100* 13.2 13.6 97
Cole Canyon 5910 2.7 1.0 270 13.6 11.5 118
North Rapid Creek 6130 1.8 .6 300* 8.5 10.8 79
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Basin Index (%) 253* 98
CHEYENNE RIVER BASIN
Blind Park 6890 .3 .3 100* 13.2 13.6 97
North Rapid Creek 6130 1.8 .6 300* 8.5 10.8 79
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Basin Index (%) 233* 89
UPPER N. PLATTE
Arapaho Ridge 10976 20.5 23.0 89 23.1 25.2 92
Blackhall Mtn 9839 29.0 31.4 92 33.0 35.6 93
Cinnabar Park 9707 16.2 19.1 85 23.5 27.4 86
Columbine 9167 18.9 17.4 109 28.2 28.8 98
Divide Peak 8730 12.4 15.8 78 22.7 25.0 91
Joe Wright 10158 23.4 22.8 103 32.9 30.4 108
Laprele Creek 8390 5.7 6.4 89 14.1 14.8 95
Med Bow 10512 35.5 -M * 34.2 -M *
Never Summer 10323 23.6 22.2 106 19.4 19.8 98
North French Creek 10153 27.7 32.3 86 29.9 32.9 91
Old Battle 9860 31.3 35.4 88 34.6 38.7 89
Rawah 9069 9.2 6.6 139 17.8 19.0 94
Sage Creek Basin 7850 1.4 .8 175* 12.2 14.7 83
Sand Lake 10098 29.7 31.3 95 29.9 29.1 103
South Brush Creek 8495 4.3 6.6 65 14.4 16.2 89
Tower 10620 42.7 46.4 92 45.9 45.2 102
Webber Springs 9260 19.7 21.2 93 28.3 29.4 96
Whiskey Park 9020 26.9 27.1 99 32.8 32.8 100
Willow Creek Pass 9523 14.1 15.3 92 16.1 16.0 101
Zirkel 9338 19.2 22.5 85 35.2 34.8 101
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Basin Index (%) 93 96
SWEETWATER
Deer Park 9700 13.9 15.2 91 19.2 21.8 88
Larsen Creek 9000 -M 3.6 * 14.2 16.0 89
South Pass 9040 12.0 14.8 81 16.0 18.2 88
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Basin Index (%) 86 88
LOWER N. PLATTE
Casper Mtn. 7920 12.9 12.4 104 18.9 17.8 106
Laprele Creek 8390 5.7 6.4 89 14.1 14.8 95
Reno Hill 8430 15.1 13.8 109 21.6 18.7 116
Windy Peak 7915 4.5 4.0 112 12.4 12.8 97
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Basin Index (%) 104 105
LARAMIE RIVER
Brooklyn Lake 10250 20.3 23.0 88 26.1 25.0 104
Cinnabar Park 9707 16.2 19.1 85 23.5 27.4 86
Crow Creek 8335 .2 .8 25 11.2 12.6 89
Deadman Hill 10239 21.2 19.6 108 21.1 21.2 100
Rawah 9069 9.2 6.6 139 17.8 19.0 94
Roach 9740 15.8 16.4 96 22.8 21.6 106
Windy Peak 7915 4.5 4.0 112 12.4 12.8 97
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Basin Index (%) 98 97
S. PLATTE
Crow Creek 8335 .2 .8 25 11.2 12.6 89
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Basin Index (%) 25 89
LITTLE SNAKE RIVER
Battle Mountain 7498 .1 .0 * 17.6 17.6 100
Divide Peak 8730 12.4 15.8 78 22.7 25.0 91
Elk River 8739 12.2 12.8 95 24.4 23.0 106
Elkhead Divide 8800 14.0 -M * 23.8 -M *
Little Snake River 8928 19.9 24.5 81 34.6 36.8 94
Old Battle 9860 31.3 35.4 88 34.6 38.7 89
Sage Creek Basin 7850 1.4 .8 175* 12.2 14.7 83
Sandstone RS 8152 4.9 6.2 79 17.5 20.0 88
Whiskey Park 9020 26.9 27.1 99 32.8 32.8 100
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Basin Index (%) 89 94
UPPER GREEN RIVER
Big Sandy Opening 9080 11.3 11.5 98 14.2 15.0 95
Blind Bull Sum 8650 23.0 24.6 93 16.2 19.4 84
East Rim Divide 7930 2.8 6.1 46 12.3 12.5 98
Elkhart Park G.S. 9400 9.4 11.2 84 11.5 13.8 83
Gros Ventre Summit 8750 11.8 12.0 98 12.5 14.5 86
Gunsight Pass 9820 14.5 13.0 112 16.4 16.2 101
Indian Creek 9425 22.6 22.3 101 21.9 21.2 103
Kendall R.S. 7740 5.2 4.4 118 15.5 14.5 107
Larsen Creek 9000 -M 3.6 * 14.2 16.0 89
Loomis Park 8240 9.9 11.6 85 17.7 18.4 96
New Fork Lake 8340 5.7 5.9 97 11.2 12.0 93
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 5.6 7.1 79 17.1 15.2 112
Spring Creek Divide 9000 23.3 25.2 92 25.7 25.4 101
Triple Peak 8500 21.1 19.1 110 28.9 28.4 102
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Basin Index (%) 96 97
LOWER GREEN RIVER
Blacks Fork Jct 8869 3.0 3.9 77 14.5 14.2 102
Buck Pasture 9632 10.7 -M * 18.9 -M *
EF Blacks Fork GS 9360 3.4 8.0 42 14.1 13.6 104
Hams Fork 7840 1.3 2.6 50 12.9 12.0 108
Henrys Fork 10182 -M -M * 13.5 -M *
Hewinta 9500 3.0 5.9 51 16.8 15.9 106
Hickerson Park 9122 .3 3.6 8 11.4 12.2 93
Hole-in-Rock 9168 .0 2.4 0 11.7 11.7 100
Indian Creek 9425 22.6 22.3 101 21.9 21.2 103
Kelley R.S. 8180 10.4 11.2 93 18.2 18.0 101
Spirit Lk 10235 6.0 12.5 48 17.6 19.9 88
Steel Creek Park 10158 15.1 17.4 87 19.7 19.0 104
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Basin Index (%) 72 101
UPPER BEAR RIVER
Bear River RS 8777 .0 .4 0* 15.5 13.8 112
Bug Lake 7987 12.7 14.2 89 20.8 19.4 107
Burts Miller Ranch 8000 .0 .0 * 9.2 8.7 106
Chalk Creek #1 9171 19.6 21.9 89 25.9 25.8 100
Giveout 6930 .2 .0 * 13.8 13.8 100
Hayden Fork 9130 2.8 9.2 30 24.3 23.2 105
Kelley R.S. 8180 10.4 11.2 93 18.2 18.0 101
Lily Lake 9133 7.3 10.4 70 17.8 18.0 99
Monte Cristo 8932 19.8 24.2 82 27.9 28.1 99
Salt River Summit 7640 10.6 8.1 131 17.9 17.8 101
Spring Creek Divide 9000 23.3 25.2 92 25.7 25.4 101
Trial Lake 9992 20.8 22.6 92 24.7 24.8 100
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Basin Index (%) 86 102
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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.
