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 SUNDAY: MAY 15 , 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 5.4 2.4 225 20.8 24.2 86
Blind Bull Sum 8650 23.5 23.7 99 17.1 20.6 83
Cottonwood Creek 7670 14.3 10.8 132 29.4 30.0 98
East Rim Divide 7930 .1 .0 * 12.6 13.7 92
Grand Targhee 9260 37.7 45.2 83 33.0 37.3 88
Granite Creek 6770 .9 2.8 32 -M 21.8 *
Grassy Lake 7265 21.5 19.7 109 36.0 40.2 90
Gros Ventre Summit 8750 7.1 8.7 82 13.3 15.2 88
Gunsight Pass 9820 14.1 11.8 119 17.1 17.4 98
Lewis Lake Divide 7850 22.0 25.2 87 37.0 39.1 95
Loomis Park 8240 5.1 5.8 88 18.1 20.2 90
Phillips Bench 8200 20.8 22.0 95 28.0 30.6 92
Salt River Summit 7640 5.6 .6 933* 18.5 18.9 98
Snake River Station 6920 .3 .0 * 21.4 26.3 81
Somsen Ranch 6800 .0 .0 * -M 19.4 *
Spring Creek Divide 9000 22.5 22.8 99 26.6 27.4 97
Thumb Divide 7980 11.6 5.2 223 22.1 22.2 100
Togwotee Pass 9580 23.8 24.0 99 26.3 28.8 91
Triple Peak 8500 18.4 14.8 124 30.0 30.0 100
Two Ocean Plateau 9240 32.7 32.3 101 30.9 31.0 100
Willow Creek 8080 24.3 20.6 118 38.8 40.0 97
Younts Peak 8350 9.8 10.4 94 14.2 18.0 79
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Basin Index (%) 104 92
MADISON HEADWATERS IN WYOMING
Black Bear 8170 32.2 38.2 84 35.8 42.2 85
Canyon 7870 10.0 -M * 16.2 -M *
Madison Plateau 7750 18.4 18.9 97 25.7 30.6 84
West Yellowstone 6700 .0 .0 * 16.0 16.4 98
Whiskey Creek 6800 10.6 8.4 126 -M 24.2 *
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Basin Index (%) 93 87
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 21.7 24.0 90 21.0 24.8 85
Canyon 7870 10.0 -M * 16.2 -M *
Evening Star 9200 30.7 25.5 120 30.3 33.6 90
Fisher Creek 9100 34.6 36.4 95 37.9 40.6 93
Monument Peak 8850 21.5 20.0 108 26.8 27.0 99
Northeast Entrance 7350 .1 .0 * 14.8 15.6 95
Parker Peak 9400 25.5 22.0 116 25.7 23.6 109
Sylvan Lake 8420 16.0 15.6 103 26.9 27.7 97
Thumb Divide 7980 11.6 5.2 223 22.1 22.2 100
Two Ocean Plateau 9240 32.7 32.3 101 30.9 31.0 100
White Mill 8700 24.6 25.4 97 25.1 27.1 93
Wolverine 7650 1.5 .0 * 16.3 14.8 110
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Basin Index (%) 107 96
WIND RIVER
Burroughs Creek 8750 6.7 -M * 17.4 -M *
Castle Creek 8400 .1 .0 * -M 11.0 *
Cold Springs 9630 5.4 .6 900* 16.2 13.4 121
Deer Park 9700 13.7 13.2 104 21.3 23.4 91
Hobbs Park 10100 19.0 16.5 115 21.5 18.6 116
Kirwin 9550 14.1 11.0 128 17.8 16.0 111
Little Warm 9370 10.7 6.4 167 17.4 15.0 116
South Pass 9040 9.6 11.6 83 18.2 19.6 93
St. Lawrence Alt 8620 .0 -M * 12.4 -M *
Togwotee Pass 9580 23.8 24.0 99 26.3 28.8 91
Townsend Creek 8700 7.8 2.5 312 17.0 15.6 109
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Basin Index (%) 121 104
BIGHORN BASIN
Bald Mtn. 9380 19.3 20.4 95 18.7 20.3 92
Bear Trap Meadow 8200 .2 .0 * 13.3 12.5 106
Bone Springs Div 9350 18.4 16.4 112 16.9 19.2 88
Grave Springs 8550 7.2 5.2 138 14.0 13.1 107
Kirwin 9550 14.1 11.0 128 17.8 16.0 111
Marquette 8760 5.3 6.5 82 12.9 14.8 87
Middle Powder 7760 9.8 7.2 136 14.2 13.4 106
Owl Creek 8975 .2 .0 * 10.5 9.5 111
Powder River Pass 9480 7.6 8.4 90 12.8 17.0 75
Shell Creek 9580 -M 16.0 * -M 17.4 *
Timber Creek 7950 .1 .0 * 12.0 12.0 100
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Basin Index (%) 109 97
SHOSHONE RIVER
Blackwater 9780 27.5 22.8 121 28.7 27.4 105
Evening Star 9200 30.7 25.5 120 30.3 33.6 90
Marquette 8760 5.3 6.5 82 12.9 14.8 87
Sylvan Lake 8420 16.0 15.6 103 26.9 27.7 97
Sylvan Road 7120 .1 .0 * -M 19.2 *
Younts Peak 8350 9.8 10.4 94 14.2 18.0 79
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Basin Index (%) 111 93
POWDER RIVER
Bear Trap Meadow 8200 .2 .0 * 13.3 12.5 106
Cloud Peak Reservoir 9860 15.4 15.0 103 19.5 19.3 101
Grave Springs 8550 7.2 5.2 138 14.0 13.1 107
Hansen Sawmill 8360 .1 .0 * 12.9 12.8 101
Middle Powder 7760 9.8 7.2 136 14.2 13.4 106
Powder River Pass 9480 7.6 8.4 90 12.8 17.0 75
Soldier Park 8720 .2 .0 * 13.4 12.1 111
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Basin Index (%) 113 100
TONGUE RIVER
Big Goose 7990 7.1 6.7 106 15.7 15.8 99
Bone Springs Div 9350 18.4 16.4 112 16.9 19.2 88
Burgess Junction 7880 12.4 9.4 132 18.0 16.4 110
Dome Lake 8880 13.0 9.2 141 18.5 18.8 98
Little Goose 8870 9.6 8.8 109 19.0 17.0 112
Sucker Creek 8880 13.2 10.0 132 21.9 19.4 113
Tie Creek 6870 .1 .0 * 17.0 16.0 106
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Basin Index (%) 122 104
BELLE FOURCHE
Blind Park 6890 .0 .0 * 15.5 14.5 107
Cole Canyon 5910 .0 .0 * 15.4 13.8 112
North Rapid Creek 6130 1.3 .0 * 9.2 12.5 74
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Basin Index (%) * 98
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 15.5 14.5 107
North Rapid Creek 6130 1.3 .0 * 9.2 12.5 74
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Basin Index (%) * 91
UPPER N. PLATTE
Arapaho Ridge 10976 16.4 21.0 78 24.9 27.6 90
Blackhall Mtn 9839 25.1 29.7 85 34.8 38.9 89
Cinnabar Park 9707 9.6 15.2 63 24.1 27.9 86
Columbine 9167 5.5 7.6 72 29.4 30.8 95
Divide Peak 8730 4.6 10.0 46 23.9 25.6 93
Joe Wright 10158 21.0 21.0 100 35.8 32.6 110
Laprele Creek 8390 .0 .0 * 14.7 16.2 91
Med Bow 10512 35.6 -M * 36.0 -M *
Never Summer 10323 22.0 21.5 102 21.9 21.8 100
North French Creek 10153 25.8 30.9 83 31.5 35.2 89
Old Battle 9860 30.0 35.6 84 36.1 41.4 87
Rawah 9069 2.7 .8 338* 19.9 20.2 99
Sage Creek Basin 7850 -M .0 * 13.0 16.1 81
Sand Lake 10098 28.9 31.0 93 31.6 31.6 100
South Brush Creek 8495 .4 .2 200* 15.8 18.6 85
Tower 10620 42.4 47.0 90 47.8 48.3 99
Webber Springs 9260 13.7 14.2 96 29.6 32.0 92
Whiskey Park 9020 -M 24.4 * 33.9 35.2 96
Willow Creek Pass 9523 10.3 12.7 81 18.1 17.1 106
Zirkel 9338 9.0 14.3 63 36.3 35.6 102
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Basin Index (%) 86 95
SWEETWATER
Deer Park 9700 13.7 13.2 104 21.3 23.4 91
Larsen Creek 9000 -M .0 * 15.7 16.5 95
South Pass 9040 9.6 11.6 83 18.2 19.6 93
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Basin Index (%) 94 93
LOWER N. PLATTE
Casper Mtn. 7920 6.5 5.8 112 19.6 18.6 105
Laprele Creek 8390 .0 .0 * 14.7 16.2 91
Reno Hill 8430 10.6 8.1 131 22.4 21.2 106
Windy Peak 7915 .2 .0 * 13.3 14.3 93
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Basin Index (%) 124 100
LARAMIE RIVER
Brooklyn Lake 10250 14.4 19.5 74 27.0 27.2 99
Cinnabar Park 9707 9.6 15.2 63 24.1 27.9 86
Crow Creek 8335 .1 .0 * 11.9 14.0 85
Deadman Hill 10239 15.7 17.4 90 23.6 23.5 100
Rawah 9069 2.7 .8 338* 19.9 20.2 99
Roach 9740 9.4 12.7 74 24.3 23.4 104
Windy Peak 7915 .2 .0 * 13.3 14.3 93
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Basin Index (%) 79 96
S. PLATTE
Crow Creek 8335 .1 .0 * 11.9 14.0 85
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Basin Index (%) * 85
LITTLE SNAKE RIVER
Battle Mountain 7498 .1 .0 * 18.3 18.5 99
Divide Peak 8730 4.6 10.0 46 23.9 25.6 93
Elk River 8739 1.2 1.6 75* 25.4 23.5 108
Elkhead Divide 8800 6.8 -M * 24.9 -M *
Little Snake River 8928 13.2 16.8 79 35.8 39.2 91
Old Battle 9860 30.0 35.6 84 36.1 41.4 87
Sage Creek Basin 7850 -M .0 * 13.0 16.1 81
Sandstone RS 8152 .0 .0 * 18.2 21.2 86
Whiskey Park 9020 -M 24.4 * 33.9 35.2 96
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Basin Index (%) 77* 93
UPPER GREEN RIVER
Big Sandy Opening 9080 9.0 8.5 106 15.6 16.0 98
Blind Bull Sum 8650 23.5 23.7 99 17.1 20.6 83
East Rim Divide 7930 .1 .0 * 12.6 13.7 92
Elkhart Park G.S. 9400 6.4 9.0 71 12.1 15.7 77
Gros Ventre Summit 8750 7.1 8.7 82 13.3 15.2 88
Gunsight Pass 9820 14.1 11.8 119 17.1 17.4 98
Indian Creek 9425 21.1 21.4 99 22.8 23.6 97
Kendall R.S. 7740 .0 .0 * 15.8 15.8 100
Larsen Creek 9000 -M .0 * 15.7 16.5 95
Loomis Park 8240 5.1 5.8 88 18.1 20.2 90
New Fork Lake 8340 .5 .6 83* 11.4 13.4 85
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 .0 1.0 0* 17.9 16.1 111
Spring Creek Divide 9000 22.5 22.8 99 26.6 27.4 97
Triple Peak 8500 18.4 14.8 124 30.0 30.0 100
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Basin Index (%) 100 94
LOWER GREEN RIVER
Blacks Fork Jct 8869 .6 .0 * 15.2 15.1 101
Buck Pasture 9632 2.9 -M * 20.2 -M *
EF Blacks Fork GS 9360 -M .5 * 15.1 14.6 103
Hams Fork 7840 .0 .0 * 13.3 14.0 95
Henrys Fork 10182 -M -M * 14.3 -M *
Hewinta 9500 -M .0 * -M 17.1 *
Hickerson Park 9122 .0 .0 * 12.6 13.0 97
Hole-in-Rock 9168 .0 .0 * 12.7 13.2 96
Indian Creek 9425 21.1 21.4 99 22.8 23.6 97
Kelley R.S. 8180 6.7 5.1 131 19.1 19.6 97
Spirit Lk 10235 1.0 6.7 15 18.4 20.0 92
Steel Creek Park 10158 12.0 15.8 76 20.6 20.8 99
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Basin Index (%) 84* 97
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 16.4 14.4 114
Bug Lake 7987 5.6 10.6 53 21.4 20.2 106
Burts Miller Ranch 8000 .0 .0 * 9.9 8.8 112
Chalk Creek #1 9171 14.2 17.6 81 27.3 27.8 98
Giveout 6930 .2 .0 * 14.1 15.0 94
Hayden Fork 9130 .0 1.0 0* 25.1 24.4 103
Kelley R.S. 8180 6.7 5.1 131 19.1 19.6 97
Lily Lake 9133 .2 1.3 15 18.7 20.0 94
Monte Cristo 8932 14.7 19.0 77 29.2 29.6 99
Salt River Summit 7640 5.6 .6 933* 18.5 18.9 98
Spring Creek Divide 9000 22.5 22.8 99 26.6 27.4 97
Trial Lake 9992 9.7 19.4 50 25.6 26.6 96
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Basin Index (%) 82 100
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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.
