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 FRIDAY: MAY 5 , 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 12.7 8.6 148 22.6 22.8 99
Blind Bull Sum 8650 25.6 24.4 105 -M 19.6 *
Cottonwood Creek 7670 21.1 16.0 132 31.7 28.4 112
East Rim Divide 7930 3.8 5.4 70 13.1 12.6 104
Grand Targhee 9260 46.9 46.3 101 -M 36.2 *
Granite Creek 6770 -M 8.8 * -M 21.0 *
Grassy Lake 7265 30.4 26.6 114 42.4 38.6 110
Gros Ventre Summit 8750 10.3 11.2 92 11.8 14.8 80
Gunsight Pass 9820 12.1 12.4 98 15.0 16.4 91
Lewis Lake Divide 7850 34.1 29.3 116 42.8 37.0 116
Loomis Park 8240 -M 10.9 * -M 18.7 *
Phillips Bench 8200 -M 26.3 * -M 28.8 *
Salt River Summit 7640 15.7 7.2 218 22.3 18.0 124
Snake River Station 6920 10.5 7.0 150 24.6 24.8 99
Somsen Ranch 6800 12.3 .0 * 23.4 18.2 129
Spring Creek Divide 9000 -M 25.0 * -M 25.5 *
Thumb Divide 7980 15.4 11.0 140 20.9 21.4 98
Togwotee Pass 9580 -M 25.4 * -M 27.3 *
Triple Peak 8500 20.6 18.6 111 28.4 28.7 99
Two Ocean Plateau 9240 34.1 32.4 105 30.3 30.0 101
Willow Creek 8080 33.1 25.8 128 40.5 38.1 106
Younts Peak 8350 10.4 13.8 75 14.9 17.5 85
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Basin Index (%) 118 105
MADISON HEADWATERS IN WYOMING
Black Bear 8170 45.4 40.0 114 45.9 41.2 111
Canyon 7870 12.0 -M * 19.2 -M *
Madison Plateau 7750 29.1 22.8 128 32.0 28.0 114
West Yellowstone 6700 5.9 .0 * 20.5 16.0 128
Whiskey Creek 6800 19.7 12.3 160 27.8 22.8 122
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Basin Index (%) 133 117
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.4 23.9 85 20.4 23.3 88
Canyon 7870 12.0 -M * 19.2 -M *
Evening Star 9200 24.2 26.7 91 31.4 32.0 98
Fisher Creek 9100 35.4 35.8 99 38.3 37.4 102
Monument Peak 8850 20.2 22.0 92 26.8 26.0 103
Northeast Entrance 7350 1.5 1.1 136 13.9 14.7 95
Parker Peak 9400 25.7 24.4 105 26.9 22.9 117
Sylvan Lake 8420 -M 18.7 * -M 26.6 *
Thumb Divide 7980 15.4 11.0 140 20.9 21.4 98
Two Ocean Plateau 9240 34.1 32.4 105 30.3 30.0 101
White Mill 8700 25.0 26.6 94 25.6 25.8 99
Wolverine 7650 5.7 2.7 211 14.4 14.0 103
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Basin Index (%) 100 101
WIND RIVER
Burroughs Creek 8750 3.5 -M * 11.8 -M *
Castle Creek 8400 .1 .0 * 8.1 9.9 82
Cold Springs 9630 2.0 3.2 62 12.0 11.4 105
Deer Park 9700 24.2 15.0 161 28.7 22.1 130
Hobbs Park 10100 17.4 16.6 105 19.7 16.8 117
Kirwin 9550 8.4 11.4 74 14.8 14.6 101
Little Warm 9370 7.6 8.5 89 14.8 13.6 109
South Pass 9040 19.4 13.6 143 23.5 18.4 128
St. Lawrence Alt 8620 2.6 -M * 13.0 -M *
Togwotee Pass 9580 -M 25.4 * -M 27.3 *
Townsend Creek 8700 11.6 8.2 141 16.9 13.7 123
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Basin Index (%) 119 115
BIGHORN BASIN
Bald Mtn. 9380 18.2 20.6 88 17.3 19.0 91
Bear Trap Meadow 8200 .2 .4 50* 11.0 11.4 96
Bone Springs Div 9350 -M 17.6 * -M 18.5 *
Grave Springs 8550 5.2 8.3 63 12.7 12.2 104
Kirwin 9550 8.4 11.4 74 14.8 14.6 101
Marquette 8760 7.2 7.4 97 12.8 12.6 102
Middle Powder 7760 8.9 10.4 86 11.6 12.6 92
Owl Creek 8975 -M .5 * -M 8.7 *
Powder River Pass 9480 5.5 9.2 60 15.5 15.4 101
Shell Creek 9580 13.7 16.0 86 16.1 16.2 99
Timber Creek 7950 -M 2.4 * -M 10.8 *
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Basin Index (%) 80 98
SHOSHONE RIVER
Blackwater 9780 21.5 25.8 83 25.0 26.2 95
Evening Star 9200 24.2 26.7 91 31.4 32.0 98
Marquette 8760 7.2 7.4 97 12.8 12.6 102
Sylvan Lake 8420 -M 18.7 * -M 26.6 *
Sylvan Road 7120 .1 2.4 4 16.4 18.4 89
Younts Peak 8350 10.4 13.8 75 14.9 17.5 85
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Basin Index (%) 83 94
POWDER RIVER
Bear Trap Meadow 8200 .2 .4 50* 11.0 11.4 96
Cloud Peak Reservoir 9860 13.8 16.2 85 16.8 17.2 98
Grave Springs 8550 5.2 8.3 63 12.7 12.2 104
Hansen Sawmill 8360 3.2 3.0 107 10.6 11.2 95
Middle Powder 7760 8.9 10.4 86 11.6 12.6 92
Powder River Pass 9480 5.5 9.2 60 15.5 15.4 101
Soldier Park 8720 4.8 3.0 160 10.2 11.4 89
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Basin Index (%) 82 97
TONGUE RIVER
Big Goose 7990 -M 8.4 * -M 13.7 *
Bone Springs Div 9350 -M 17.6 * -M 18.5 *
Burgess Junction 7880 11.8 10.9 108 15.7 14.8 106
Dome Lake 8880 8.8 11.0 80 13.6 16.1 84
Little Goose 8870 7.4 10.5 70 13.7 16.2 85
Sucker Creek 8880 10.6 11.1 95 18.7 17.6 106
Tie Creek 6870 3.1 1.4 221 14.6 14.0 104
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Basin Index (%) 93 97
BELLE FOURCHE
Blind Park 6890 -M .0 * -M 13.6 *
Cole Canyon 5910 .0 .0 * 12.1 12.1 100
North Rapid Creek 6130 -M .0 * -M 11.0 *
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Basin Index (%) * 100*
CHEYENNE RIVER BASIN
Blind Park 6890 -M .0 * -M 13.6 *
North Rapid Creek 6130 -M .0 * -M 11.0 *
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Basin Index (%) * *
UPPER N. PLATTE
Arapaho Ridge 10976 25.5 22.6 113 27.8 25.7 108
Blackhall Mtn 9839 34.6 31.8 109 41.2 35.9 115
Cinnabar Park 9707 -M 18.3 * 25.6 27.5 93
Columbine 9167 18.8 16.8 112 29.8 29.4 101
Divide Peak 8730 24.0 14.3 168 31.7 25.2 126
Joe Wright 10158 25.2 22.5 112 31.1 30.9 101
Laprele Creek 8390 -M 5.1 * -M 15.2 *
Med Bow 10512 41.2 -M * 38.5 -M *
Never Summer 10323 27.2 22.6 120 21.3 20.6 103
North French Creek 10153 29.8 32.4 92 33.2 33.0 101
Old Battle 9860 40.3 35.2 114 45.6 39.0 117
Rawah 9069 8.8 6.0 147 19.5 19.6 99
Sage Creek Basin 7850 15.1 .0 * 22.0 14.9 148
Sand Lake 10098 30.3 32.0 95 31.6 29.5 107
South Brush Creek 8495 6.2 5.6 111 16.8 17.0 99
Tower 10620 54.7 48.0 114 55.0 45.2 122
Webber Springs 9260 27.2 20.6 132 35.2 30.2 117
Whiskey Park 9020 35.0 26.8 131 38.8 33.6 115
Willow Creek Pass 9523 18.0 15.4 117 19.7 16.7 118
Zirkel 9338 24.0 21.5 112 37.7 35.2 107
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Basin Index (%) 119 111
SWEETWATER
Deer Park 9700 24.2 15.0 161 28.7 22.1 130
Larsen Creek 9000 7.2 2.1 343 17.1 16.1 106
South Pass 9040 19.4 13.6 143 23.5 18.4 128
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Basin Index (%) 165 122
LOWER N. PLATTE
Casper Mtn. 7920 8.4 11.6 72 16.0 17.8 90
Laprele Creek 8390 -M 5.1 * -M 15.2 *
Reno Hill 8430 14.2 13.6 104 19.5 19.0 103
Windy Peak 7915 7.5 3.4 221 14.2 13.5 105
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Basin Index (%) 105 99
LARAMIE RIVER
Brooklyn Lake 10250 21.2 22.5 94 28.7 25.5 113
Cinnabar Park 9707 -M 18.3 * 25.6 27.5 93
Crow Creek 8335 .1 .0 * 11.1 13.2 84
Deadman Hill 10239 19.7 19.4 102 21.6 21.8 99
Rawah 9069 8.8 6.0 147 19.5 19.6 99
Roach 9740 15.4 16.6 93 23.6 22.0 107
Windy Peak 7915 7.5 3.4 221 14.2 13.5 105
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Basin Index (%) 107 101
S. PLATTE
Crow Creek 8335 .1 .0 * 11.1 13.2 84
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Basin Index (%) * 84
LITTLE SNAKE RIVER
Battle Mountain 7498 5.3 .0 * 24.2 17.8 136
Divide Peak 8730 24.0 14.3 168 31.7 25.2 126
Elk River 8739 16.3 11.5 142 30.2 23.0 131
Elkhead Divide 8800 22.4 -M * 33.7 -M *
Little Snake River 8928 32.5 22.4 145 45.7 37.2 123
Old Battle 9860 40.3 35.2 114 45.6 39.0 117
Sage Creek Basin 7850 15.1 .0 * 22.0 14.9 148
Sandstone RS 8152 13.2 4.2 314 27.0 20.2 134
Whiskey Park 9020 35.0 26.8 131 38.8 33.6 115
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Basin Index (%) 159 126
UPPER GREEN RIVER
Big Sandy Opening 9080 13.6 9.8 139 17.6 15.0 117
Blind Bull Sum 8650 25.6 24.4 105 -M 19.6 *
East Rim Divide 7930 3.8 5.4 70 13.1 12.6 104
Elkhart Park G.S. 9400 10.0 10.5 95 13.4 13.9 96
Gros Ventre Summit 8750 10.3 11.2 92 11.8 14.8 80
Gunsight Pass 9820 12.1 12.4 98 15.0 16.4 91
Indian Creek 9425 -M 21.2 * -M 21.8 *
Kendall R.S. 7740 6.1 3.0 203 14.4 14.7 98
Larsen Creek 9000 7.2 2.1 343 17.1 16.1 106
Loomis Park 8240 -M 10.9 * -M 18.7 *
New Fork Lake 8340 5.8 4.7 123 -M 12.3 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 9.6 6.4 150 17.7 15.2 116
Spring Creek Divide 9000 -M 25.0 * -M 25.5 *
Triple Peak 8500 20.6 18.6 111 28.4 28.7 99
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Basin Index (%) 115 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.2 1.8 511 16.3 14.4 113
Buck Pasture 9632 16.2 -M * 23.9 -M *
EF Blacks Fork GS 9360 8.1 6.6 123 13.7 13.6 101
Hams Fork 7840 -M .4 * -M 12.1 *
Henrys Fork 10182 -M -M * 17.0 -M *
Hewinta 9500 7.7 4.0 192 18.2 16.2 112
Hickerson Park 9122 4.7 2.4 196 14.1 12.4 114
Hole-in-Rock 9168 4.7 1.6 294 13.4 12.2 110
Indian Creek 9425 -M 21.2 * -M 21.8 *
Kelley R.S. 8180 17.5 9.8 179 24.5 18.1 135
Spirit Lk 10235 19.6 12.6 156 23.6 19.9 119
Steel Creek Park 10158 19.6 17.4 113 22.4 19.4 115
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Basin Index (%) 162 116
UPPER BEAR RIVER
Bear River RS 8777 5.0 .0 * 17.5 13.8 127
Bug Lake 7987 26.7 13.5 198 26.9 19.5 138
Burts Miller Ranch 8000 .0 .0 * 15.6 8.7 179
Chalk Creek #1 9171 31.8 21.7 147 34.2 26.0 132
Giveout 6930 9.2 .0 * 17.3 13.8 125
Hayden Fork 9130 15.5 8.2 189 30.1 23.5 128
Kelley R.S. 8180 17.5 9.8 179 24.5 18.1 135
Lily Lake 9133 9.3 8.8 106 18.9 18.6 102
Monte Cristo 8932 42.9 22.2 193 42.8 28.1 152
Salt River Summit 7640 15.7 7.2 218 22.3 18.0 124
Spring Creek Divide 9000 -M 25.0 * -M 25.5 *
Trial Lake 9992 33.1 22.0 150 36.9 25.0 148
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Basin Index (%) 182 135
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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.
