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: APRIL 24 , 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 19.5 12.8 152 22.5 22.0 102
Blind Bull Sum 8650 27.5 25.0 110 19.8 19.2 103
Cottonwood Creek 7670 26.9 19.3 139 30.3 26.8 113
East Rim Divide 7930 11.4 9.2 124 12.7 11.8 108
Grand Targhee 9260 49.4 47.2 105 31.3 35.3 89
Granite Creek 6770 18.7 11.8 158 16.2 19.6 83
Grassy Lake 7265 37.7 30.5 124 42.0 37.4 112
Gros Ventre Summit 8750 13.1 13.3 98 11.8 13.6 87
Gunsight Pass 9820 15.0 13.0 115 14.3 15.4 93
Lewis Lake Divide 7850 39.8 31.8 125 42.6 35.4 120
Loomis Park 8240 17.5 12.6 139 17.8 17.4 102
Phillips Bench 8200 30.7 26.4 116 32.0 27.6 116
Salt River Summit 7640 21.6 10.8 200 21.5 17.3 124
Snake River Station 6920 19.2 13.4 143 24.4 23.7 103
Somsen Ranch 6800 -M 5.6 * -M 17.5 *
Spring Creek Divide 9000 30.3 25.8 117 -M 24.8 *
Thumb Divide 7980 21.5 16.4 131 20.5 19.8 104
Togwotee Pass 9580 23.7 24.9 95 22.7 26.2 87
Triple Peak 8500 27.0 20.1 134 28.0 27.2 103
Two Ocean Plateau 9240 34.7 32.8 106 29.5 28.6 103
Willow Creek 8080 39.8 28.0 142 39.3 35.8 110
Younts Peak 8350 16.4 15.2 108 14.3 16.4 87
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Basin Index (%) 123 104
MADISON HEADWATERS IN WYOMING
Black Bear 8170 45.6 39.5 115 46.4 39.3 118
Canyon 7870 15.2 -M * 18.5 -M *
Madison Plateau 7750 32.0 23.3 137 31.6 26.3 120
West Yellowstone 6700 15.1 4.7 321 20.2 15.5 130
Whiskey Creek 6800 22.3 15.4 145 27.6 22.1 125
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Basin Index (%) 139 122
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.9 23.7 88 19.8 22.2 89
Canyon 7870 15.2 -M * 18.5 -M *
Evening Star 9200 28.4 26.7 106 30.8 30.5 101
Fisher Creek 9100 35.9 35.6 101 37.3 35.8 104
Monument Peak 8850 23.4 22.4 104 26.3 24.0 110
Northeast Entrance 7350 8.9 5.7 156 13.6 14.0 97
Parker Peak 9400 28.8 24.2 119 26.4 21.4 123
Sylvan Lake 8420 21.5 20.0 108 26.0 25.2 103
Thumb Divide 7980 21.5 16.4 131 20.5 19.8 104
Two Ocean Plateau 9240 34.7 32.8 106 29.5 28.6 103
White Mill 8700 26.4 25.6 103 24.9 24.6 101
Wolverine 7650 12.9 6.5 198 13.7 13.3 103
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Basin Index (%) 110 104
WIND RIVER
Burroughs Creek 8750 10.4 -M * 11.6 -M *
Castle Creek 8400 5.0 3.3 152 7.9 9.1 87
Cold Springs 9630 7.5 5.9 127 11.1 10.4 107
Deer Park 9700 25.4 15.6 163 26.2 20.4 128
Hobbs Park 10100 17.6 15.6 113 16.8 15.1 111
Kirwin 9550 11.1 11.8 94 13.9 14.0 99
Little Warm 9370 11.7 10.2 115 14.1 12.8 110
South Pass 9040 20.3 15.1 134 21.0 17.5 120
St. Lawrence Alt 8620 6.8 -M * 11.2 -M *
Togwotee Pass 9580 23.7 24.9 95 22.7 26.2 87
Townsend Creek 8700 13.0 9.5 137 14.8 13.2 112
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Basin Index (%) 121 107
BIGHORN BASIN
Bald Mtn. 9380 20.0 20.5 98 17.0 17.8 96
Bear Trap Meadow 8200 8.4 3.4 247 10.9 10.2 107
Bone Springs Div 9350 17.5 17.8 98 13.6 17.4 78
Grave Springs 8550 9.8 8.2 120 12.5 11.2 112
Kirwin 9550 11.1 11.8 94 13.9 14.0 99
Marquette 8760 9.8 8.0 122 11.3 11.2 101
Middle Powder 7760 13.1 11.1 118 11.1 11.2 99
Owl Creek 8975 6.0 3.1 194 9.9 7.4 134
Powder River Pass 9480 10.7 10.6 101 15.3 14.9 103
Shell Creek 9580 15.1 16.6 91 15.7 15.4 102
Timber Creek 7950 6.1 4.4 139 8.7 9.2 95
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Basin Index (%) 110 100
SHOSHONE RIVER
Blackwater 9780 23.7 25.7 92 24.2 24.4 99
Evening Star 9200 28.4 26.7 106 30.8 30.5 101
Marquette 8760 9.8 8.0 122 11.3 11.2 101
Sylvan Lake 8420 21.5 20.0 108 26.0 25.2 103
Sylvan Road 7120 8.4 7.8 108 16.2 17.8 91
Younts Peak 8350 16.4 15.2 108 14.3 16.4 87
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Basin Index (%) 105 98
POWDER RIVER
Bear Trap Meadow 8200 8.4 3.4 247 10.9 10.2 107
Cloud Peak Reservoir 9860 15.8 16.0 99 16.2 15.6 104
Grave Springs 8550 9.8 8.2 120 12.5 11.2 112
Hansen Sawmill 8360 8.0 4.9 163 10.4 10.0 104
Middle Powder 7760 13.1 11.1 118 11.1 11.2 99
Powder River Pass 9480 10.7 10.6 101 15.3 14.9 103
Soldier Park 8720 8.4 6.4 131 9.8 10.9 90
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Basin Index (%) 122 103
TONGUE RIVER
Big Goose 7990 10.6 8.6 123 11.8 11.7 101
Bone Springs Div 9350 17.5 17.8 98 13.6 17.4 78
Burgess Junction 7880 12.9 12.0 108 14.6 14.0 104
Dome Lake 8880 11.6 12.0 97 13.2 15.0 88
Little Goose 8870 10.5 10.6 99 13.2 14.2 93
Sucker Creek 8880 13.4 12.9 104 17.8 16.0 111
Tie Creek 6870 8.2 3.6 228 13.9 13.2 105
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Basin Index (%) 109 97
BELLE FOURCHE
Blind Park 6890 5.2 3.4 153 12.4 12.8 97
Cole Canyon 5910 6.0 1.4 429 11.8 10.2 116
North Rapid Creek 6130 4.8 3.2 150 10.2 10.6 96
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Basin Index (%) 200 102
CHEYENNE RIVER BASIN
Blind Park 6890 5.2 3.4 153 12.4 12.8 97
North Rapid Creek 6130 4.8 3.2 150 10.2 10.6 96
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Basin Index (%) 152 97
UPPER N. PLATTE
Arapaho Ridge 10976 27.4 23.7 116 26.1 24.4 107
Blackhall Mtn 9839 39.0 33.1 118 40.2 32.7 123
Cinnabar Park 9707 -M 20.0 * 24.9 24.7 101
Columbine 9167 27.6 20.8 133 28.3 27.8 102
Divide Peak 8730 29.4 17.7 166 30.7 23.8 129
Joe Wright 10158 26.5 22.6 117 30.0 29.0 103
Laprele Creek 8390 12.0 7.0 171 14.5 13.4 108
Med Bow 10512 41.1 -M * 37.3 -M *
Never Summer 10323 27.7 21.8 127 20.3 18.8 108
North French Creek 10153 31.3 31.6 99 32.1 30.4 106
Old Battle 9860 44.2 34.3 129 44.6 36.8 121
Rawah 9069 14.4 9.0 160 18.5 18.2 102
Sage Creek Basin 7850 25.3 4.2 602 21.5 14.3 150
Sand Lake 10098 30.1 30.6 98 30.0 27.6 109
South Brush Creek 8495 13.1 8.5 154 15.6 15.2 103
Tower 10620 53.2 46.0 116 53.5 44.2 121
Webber Springs 9260 30.2 21.6 140 34.1 28.1 121
Whiskey Park 9020 39.3 26.6 148 37.8 30.6 124
Willow Creek Pass 9523 19.7 14.8 133 19.0 15.4 123
Zirkel 9338 31.7 23.8 133 37.2 33.3 112
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Basin Index (%) 131 114
SWEETWATER
Deer Park 9700 25.4 15.6 163 26.2 20.4 128
Larsen Creek 9000 10.6 6.7 158 15.5 15.2 102
South Pass 9040 20.3 15.1 134 21.0 17.5 120
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Basin Index (%) 151 118
LOWER N. PLATTE
Casper Mtn. 7920 15.3 13.4 114 15.4 16.0 96
Laprele Creek 8390 12.0 7.0 171 14.5 13.4 108
Reno Hill 8430 16.7 14.0 119 18.1 17.6 103
Windy Peak 7915 11.6 6.9 168 13.5 12.0 112
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Basin Index (%) 135 104
LARAMIE RIVER
Brooklyn Lake 10250 25.5 23.0 111 27.6 24.2 114
Cinnabar Park 9707 -M 20.0 * 24.9 24.7 101
Crow Creek 8335 3.0 1.7 176 9.9 11.9 83
Deadman Hill 10239 20.8 19.1 109 20.2 20.4 99
Rawah 9069 14.4 9.0 160 18.5 18.2 102
Roach 9740 18.2 16.5 110 22.3 21.0 106
Windy Peak 7915 11.6 6.9 168 13.5 12.0 112
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Basin Index (%) 123 103
S. PLATTE
Crow Creek 8335 3.0 1.7 176 9.9 11.9 83
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Basin Index (%) 176 83
LITTLE SNAKE RIVER
Battle Mountain 7498 15.7 4.0 392 23.8 16.8 142
Divide Peak 8730 29.4 17.7 166 30.7 23.8 129
Elk River 8739 27.0 14.6 185 29.6 21.4 138
Elkhead Divide 8800 31.7 -M * 33.0 -M *
Little Snake River 8928 38.2 24.3 157 44.8 34.8 129
Old Battle 9860 44.2 34.3 129 44.6 36.8 121
Sage Creek Basin 7850 25.3 4.2 602 21.5 14.3 150
Sandstone RS 8152 23.9 9.4 254 26.4 19.1 138
Whiskey Park 9020 39.3 26.6 148 37.8 30.6 124
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Basin Index (%) 180 131
UPPER GREEN RIVER
Big Sandy Opening 9080 15.5 12.6 123 16.3 14.1 116
Blind Bull Sum 8650 27.5 25.0 110 19.8 19.2 103
East Rim Divide 7930 11.4 9.2 124 12.7 11.8 108
Elkhart Park G.S. 9400 12.9 12.4 104 12.6 13.7 92
Gros Ventre Summit 8750 13.1 13.3 98 11.8 13.6 87
Gunsight Pass 9820 15.0 13.0 115 14.3 15.4 93
Indian Creek 9425 30.5 24.0 127 26.1 20.8 125
Kendall R.S. 7740 12.6 7.1 177 13.9 14.0 99
Larsen Creek 9000 10.6 6.7 158 15.5 15.2 102
Loomis Park 8240 17.5 12.6 139 17.8 17.4 102
New Fork Lake 8340 11.1 7.9 141 -M 11.4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.9 10.0 149 17.1 14.7 116
Spring Creek Divide 9000 30.3 25.8 117 -M 24.8 *
Triple Peak 8500 27.0 20.1 134 28.0 27.2 103
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Basin Index (%) 125 104
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.9 5.9 253 15.7 13.6 115
Buck Pasture 9632 21.6 -M * 23.3 -M *
EF Blacks Fork GS 9360 13.8 9.6 144 12.8 12.8 100
Hams Fork 7840 16.2 6.3 257 16.1 11.6 139
Henrys Fork 10182 -M -M * 16.7 -M *
Hewinta 9500 14.8 7.4 200 17.3 15.2 114
Hickerson Park 9122 10.2 5.0 204 13.3 11.9 112
Hole-in-Rock 9168 10.4 5.0 208 12.8 11.4 112
Indian Creek 9425 30.5 24.0 127 26.1 20.8 125
Kelley R.S. 8180 22.8 13.6 168 23.5 17.6 134
Spirit Lk 10235 22.4 13.2 170 22.4 19.4 115
Steel Creek Park 10158 22.0 16.6 133 21.6 17.8 121
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Basin Index (%) 167 119
UPPER BEAR RIVER
Bear River RS 8777 13.4 1.2 1117 17.0 13.1 130
Bug Lake 7987 31.6 16.6 190 26.2 19.1 137
Burts Miller Ranch 8000 7.7 .0 * 15.1 8.7 174
Chalk Creek #1 9171 34.9 22.2 157 33.6 24.5 137
Giveout 6930 15.6 1.3 1200 16.7 13.5 124
Hayden Fork 9130 25.0 10.8 231 29.4 22.0 134
Kelley R.S. 8180 22.8 13.6 168 23.5 17.6 134
Lily Lake 9133 17.5 10.5 167 18.4 16.5 112
Monte Cristo 8932 47.3 25.6 185 41.0 27.4 150
Salt River Summit 7640 21.6 10.8 200 21.5 17.3 124
Spring Creek Divide 9000 30.3 25.8 117 -M 24.8 *
Trial Lake 9992 40.1 22.2 181 36.0 23.7 152
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Basin Index (%) 192 137
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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.
