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 29 , 2023
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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 * 23.4 25.2 93
Blind Bull Sum 8650 15.0 17.8 84 21.5 22.8 94
Cottonwood Creek 7670 2.5 1.0 250* 34.5 31.8 108
East Rim Divide 7930 .0 .0 * 14.8 14.8 100
Grand Targhee 9260 34.2 40.6 84 34.8 40.2 87
Granite Creek 6770 -M .0 * 18.9 23.8 79
Grassy Lake 7265 12.5 8.4 149 44.8 42.9 104
Gros Ventre Summit 8750 -M .0 * 13.8 16.1 86
Gunsight Pass 9820 1.7 7.6 22 16.6 18.1 92
Lewis Lake Divide 7850 13.9 14.6 95 44.4 40.8 109
Loomis Park 8240 .3 .0 * 19.4 21.5 90
Phillips Bench 8200 11.2 11.0 102 33.9 31.6 107
Salt River Summit 7640 .0 .0 * 23.6 20.4 116
Snake River Station 6920 .1 .0 * 26.2 28.4 92
Somsen Ranch 6800 -M .0 * 24.7 21.0 118
Spring Creek Divide 9000 18.2 16.6 110 35.1 29.3 120
Thumb Divide 7980 .2 .0 * 22.1 23.2 95
Togwotee Pass 9580 9.8 20.8 47 24.8 30.8 81
Triple Peak 8500 4.1 3.4 121 29.5 32.0 92
Two Ocean Plateau 9240 21.5 27.6 78 31.8 33.1 96
Willow Creek 8080 8.7 8.0 109 42.7 41.4 103
Younts Peak 8350 .0 1.1 0* 16.4 19.8 83
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Basin Index (%) 86 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 30.9 29.0 107 47.9 45.4 106
Canyon 7870 .3 -M * 20.4 -M *
Madison Plateau 7750 13.0 10.2 127 33.4 31.7 105
West Yellowstone 6700 .0 .0 * 21.2 18.2 116
Whiskey Creek 6800 5.3 .0 * 28.6 26.0 110
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Basin Index (%) 126 108
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 14.3 20.0 72 21.8 26.9 81
Canyon 7870 .3 -M * 20.4 -M *
Evening Star 9200 10.2 21.8 47 33.2 35.6 93
Fisher Creek 9100 26.9 31.3 86 39.8 42.0 95
Monument Peak 8850 4.6 15.7 29 27.9 28.1 99
Northeast Entrance 7350 .0 .0 * 15.1 17.2 88
Parker Peak 9400 9.8 15.8 62 28.2 25.2 112
Sylvan Lake 8420 .2 8.2 2 27.6 29.8 93
Thumb Divide 7980 .2 .0 * 22.1 23.2 95
Two Ocean Plateau 9240 21.5 27.6 78 31.8 33.1 96
White Mill 8700 13.0 19.4 67 27.0 28.7 94
Wolverine 7650 .0 .0 * 15.4 16.0 96
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Basin Index (%) 63 95
WIND RIVER
Burroughs Creek 8750 .0 -M * 13.2 -M *
Castle Creek 8400 .0 .0 * 9.7 12.9 75
Cold Springs 9630 .0 .0 * 13.6 15.3 89
Deer Park 9700 11.5 6.0 192 30.9 24.8 125
Hobbs Park 10100 8.6 8.2 105 22.8 20.3 112
Kirwin 9550 .0 3.6 0 17.6 18.2 97
Little Warm 9370 .0 .0 * 15.7 16.2 97
South Pass 9040 3.2 2.0 160 25.8 21.1 122
St. Lawrence Alt 8620 .0 -M * 15.2 -M *
Togwotee Pass 9580 9.8 20.8 47 24.8 30.8 81
Townsend Creek 8700 .0 .0 * 19.7 18.0 109
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Basin Index (%) 82 102
BIGHORN BASIN
Bald Mtn. 9380 7.5 15.0 50 19.2 21.8 88
Bear Trap Meadow 8200 .0 .0 * 13.4 13.4 100
Bone Springs Div 9350 .6 10.4 6 16.2 20.8 78
Grave Springs 8550 .0 .0 * 15.4 14.4 107
Kirwin 9550 .0 3.6 0 17.6 18.2 97
Marquette 8760 .0 .1 0* 15.7 16.5 95
Middle Powder 7760 .0 .0 * 15.1 15.4 98
Owl Creek 8975 .0 .0 * 12.5 11.2 112
Powder River Pass 9480 .0 .0 * 17.2 18.4 93
Shell Creek 9580 1.8 10.2 18 17.7 19.2 92
Timber Creek 7950 .1 .0 * 12.1 13.8 88
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Basin Index (%) 25* 94
SHOSHONE RIVER
Blackwater 9780 12.6 22.1 57 27.0 29.6 91
Evening Star 9200 10.2 21.8 47 33.2 35.6 93
Marquette 8760 .0 .1 0* 15.7 16.5 95
Sylvan Lake 8420 .2 8.2 2 27.6 29.8 93
Sylvan Road 7120 .0 .0 * 17.0 21.0 81
Younts Peak 8350 .0 1.1 0* 16.4 19.8 83
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Basin Index (%) 43 90
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 13.4 13.4 100
Cloud Peak Reservoir 9860 3.7 8.6 43 21.2 21.8 97
Grave Springs 8550 .0 .0 * 15.4 14.4 107
Hansen Sawmill 8360 .0 .0 * 13.7 14.8 93
Middle Powder 7760 .0 .0 * 15.1 15.4 98
Powder River Pass 9480 .0 .0 * 17.2 18.4 93
Soldier Park 8720 .0 .2 0* 13.1 15.8 83
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Basin Index (%) 42* 96
TONGUE RIVER
Big Goose 7990 .1 .0 * 14.9 19.2 78
Bone Springs Div 9350 .6 10.4 6 16.2 20.8 78
Burgess Junction 7880 .0 .6 0* 18.0 17.9 101
Dome Lake 8880 .0 .1 0* 16.7 20.7 81
Little Goose 8870 .0 3.7 0 16.6 20.7 80
Sucker Creek 8880 .0 2.0 0 21.4 21.6 99
Tie Creek 6870 .0 .0 * 18.4 18.9 97
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Basin Index (%) 4* 87
BELLE FOURCHE
Blind Park 6890 .1 .0 * 16.2 16.0 101
Cole Canyon 5910 .0 .0 * 15.8 15.1 105
North Rapid Creek 6130 .0 .0 * 14.1 14.2 99
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Basin Index (%) * 102
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 16.2 16.0 101
North Rapid Creek 6130 .0 .0 * 14.1 14.2 99
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Basin Index (%) * 100
UPPER N. PLATTE
Arapaho Ridge 10976 14.2 12.4 115 29.8 28.6 104
Blackhall Mtn 9839 15.7 27.8 56 42.9 41.2 104
Cinnabar Park 9707 -M 5.9 * 27.1 29.4 92
Columbine 9167 -M .0 * 31.2 31.8 98
Divide Peak 8730 .0 .0 * 33.2 26.8 124
Joe Wright 10158 15.0 14.4 104 33.4 34.5 97
Laprele Creek 8390 .0 .0 * 17.5 17.6 99
Med Bow 10512 27.9 -M * 40.9 -M *
Never Summer 10323 20.3 17.1 119 23.8 23.6 101
North French Creek 10153 13.6 22.9 59 34.9 36.9 95
Old Battle 9860 33.5 27.9 120 47.1 42.4 111
Rawah 9069 .0 .0 * 21.5 21.0 102
Sage Creek Basin 7850 -M .0 * 23.0 16.9 136
Sand Lake 10098 -M 24.2 * -M 33.1 *
South Brush Creek 8495 .2 .0 * 17.6 19.7 89
Tower 10620 34.4 37.4 92 56.9 50.2 113
Webber Springs 9260 10.6 3.2 331 35.6 32.3 110
Whiskey Park 9020 7.8 10.6 74 39.4 36.0 109
Willow Creek Pass 9523 3.3 3.2 103 21.3 18.3 116
Zirkel 9338 -M .0 * 38.4 36.4 105
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Basin Index (%) 95 106
SWEETWATER
Deer Park 9700 11.5 6.0 192 30.9 24.8 125
Larsen Creek 9000 -M .0 * 18.7 17.2 109
South Pass 9040 3.2 2.0 160 25.8 21.1 122
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Basin Index (%) 184 119
LOWER N. PLATTE
Casper Mtn. 7920 -M .0 * 21.7 20.8 104
Laprele Creek 8390 .0 .0 * 17.5 17.6 99
Reno Hill 8430 .0 .0 * 23.3 22.6 103
Windy Peak 7915 -M .0 * 16.3 16.5 99
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Basin Index (%) * 102
LARAMIE RIVER
Brooklyn Lake 10250 2.9 8.8 33 31.0 28.6 108
Cinnabar Park 9707 -M 5.9 * 27.1 29.4 92
Crow Creek 8335 .0 .0 * 13.0 16.0 81
Deadman Hill 10239 8.3 10.2 81 24.9 24.2 103
Rawah 9069 .0 .0 * 21.5 21.0 102
Roach 9740 1.0 2.6 38 26.1 24.6 106
Windy Peak 7915 -M .0 * 16.3 16.5 99
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Basin Index (%) 56* 100
S. PLATTE
Crow Creek 8335 .0 .0 * 13.0 16.0 81
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Basin Index (%) * 81
LITTLE SNAKE RIVER
Battle Mountain 7498 -M .0 * 24.4 19.8 123
Divide Peak 8730 .0 .0 * 33.2 26.8 124
Elk River 8739 -M .0 * 30.6 24.4 125
Elkhead Divide 8800 .3 -M * 34.4 -M *
Little Snake River 8928 9.1 4.8 190 47.2 40.4 117
Old Battle 9860 33.5 27.9 120 47.1 42.4 111
Sage Creek Basin 7850 -M .0 * 23.0 16.9 136
Sandstone RS 8152 .0 .0 * 27.6 22.0 125
Whiskey Park 9020 7.8 10.6 74 39.4 36.0 109
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Basin Index (%) 116* 119
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * 18.9 17.4 109
Blind Bull Sum 8650 15.0 17.8 84 21.5 22.8 94
East Rim Divide 7930 .0 .0 * 14.8 14.8 100
Elkhart Park G.S. 9400 .0 .2 0* 15.0 17.4 86
Gros Ventre Summit 8750 -M .0 * 13.8 16.1 86
Gunsight Pass 9820 1.7 7.6 22 16.6 18.1 92
Indian Creek 9425 13.6 13.0 105 28.5 25.8 110
Kendall R.S. 7740 .1 .0 * 15.8 17.0 93
Larsen Creek 9000 -M .0 * 18.7 17.2 109
Loomis Park 8240 .3 .0 * 19.4 21.5 90
New Fork Lake 8340 -M .0 * -M 14.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 19.2 17.9 107
Spring Creek Divide 9000 18.2 16.6 110 35.1 29.3 120
Triple Peak 8500 4.1 3.4 121 29.5 32.0 92
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Basin Index (%) 90* 100
LOWER GREEN RIVER
Blacks Fork Jct 8869 .4 .0 * 17.2 15.7 110
Buck Pasture 9632 .3 -M * 25.3 -M *
EF Blacks Fork GS 9360 .0 .0 * 17.3 16.8 103
Hams Fork 7840 -M .0 * 18.4 14.8 124
Henrys Fork 10182 -M -M * 18.2 -M *
Hewinta 9500 .0 .0 * 19.8 17.8 111
Hickerson Park 9122 .0 .0 * 14.6 14.4 101
Hole-in-Rock 9168 -M .0 * -M 13.9 *
Indian Creek 9425 13.6 13.0 105 28.5 25.8 110
Kelley R.S. 8180 .0 .0 * 26.2 22.1 119
Spirit Lk 10235 3.1 .0 * 25.2 20.6 122
Steel Creek Park 10158 10.4 10.0 104 23.9 21.1 113
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Basin Index (%) 120* 113
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 18.6 15.2 122
Bug Lake 7987 2.6 .0 * 29.9 21.8 137
Burts Miller Ranch 8000 .2 .0 * 16.4 9.8 167
Chalk Creek #1 9171 10.4 4.4 236 35.7 29.8 120
Giveout 6930 -M .0 * 19.0 16.8 113
Hayden Fork 9130 .0 .0 * 31.3 25.5 123
Kelley R.S. 8180 .0 .0 * 26.2 22.1 119
Lily Lake 9133 .4 .0 * 20.4 21.2 96
Monte Cristo 8932 19.4 7.0 277 44.5 30.6 145
Salt River Summit 7640 .0 .0 * 23.6 20.4 116
Spring Creek Divide 9000 18.2 16.6 110 35.1 29.3 120
Trial Lake 9992 18.2 7.3 249 38.5 27.6 139
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Basin Index (%) 197* 126
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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.
