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 THURSDAY: APRIL 13 , 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 18.5 14.6 127 21.2 20.3 104
Blind Bull Sum 8650 27.6 24.5 113 19.5 17.8 110
Cottonwood Creek 7670 24.9 21.0 119 28.6 25.7 111
East Rim Divide 7930 11.9 10.0 119 12.3 11.4 108
Grand Targhee 9260 47.4 45.4 104 30.2 33.1 91
Granite Creek 6770 19.1 13.8 138 16.1 18.7 86
Grassy Lake 7265 -M 32.3 * -M 35.7 *
Gros Ventre Summit 8750 12.7 12.8 99 11.7 12.4 94
Gunsight Pass 9820 13.7 12.8 107 13.6 14.4 94
Lewis Lake Divide 7850 37.4 32.0 117 40.9 33.4 122
Loomis Park 8240 17.0 14.8 115 17.3 17.0 102
Phillips Bench 8200 30.1 26.2 115 30.9 26.8 115
Salt River Summit 7640 20.6 12.0 172 20.7 16.4 126
Snake River Station 6920 19.0 15.2 125 23.5 22.8 103
Somsen Ranch 6800 -M 9.8 * -M 16.8 *
Spring Creek Divide 9000 31.6 25.1 126 -M 23.6 *
Thumb Divide 7980 20.3 15.8 128 19.8 18.3 108
Togwotee Pass 9580 22.7 23.9 95 21.8 25.0 87
Triple Peak 8500 26.2 22.4 117 27.1 25.6 106
Two Ocean Plateau 9240 33.0 30.7 107 27.7 27.4 101
Willow Creek 8080 40.0 28.6 140 36.9 34.1 108
Younts Peak 8350 16.4 14.4 114 14.0 15.2 92
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Basin Index (%) 118 104
MADISON HEADWATERS IN WYOMING
Black Bear 8170 39.8 38.6 103 43.9 37.6 117
Canyon 7870 14.7 -M * 17.6 -M *
Madison Plateau 7750 32.6 23.2 141 30.2 25.2 120
West Yellowstone 6700 14.8 8.2 180 19.6 14.0 140
Whiskey Creek 6800 21.9 15.2 144 26.7 20.8 128
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Basin Index (%) 128 123
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.4 22.2 92 18.8 20.4 92
Canyon 7870 14.7 -M * 17.6 -M *
Evening Star 9200 26.9 25.4 106 29.4 28.6 103
Fisher Creek 9100 34.7 34.0 102 36.0 34.0 106
Monument Peak 8850 22.8 21.2 108 24.9 22.4 111
Northeast Entrance 7350 -M 8.2 * -M 13.3 *
Parker Peak 9400 26.1 21.9 119 24.6 20.4 121
Sylvan Lake 8420 19.9 20.0 100 24.3 23.6 103
Thumb Divide 7980 20.3 15.8 128 19.8 18.3 108
Two Ocean Plateau 9240 33.0 30.7 107 27.7 27.4 101
White Mill 8700 25.3 24.9 102 23.9 23.4 102
Wolverine 7650 12.6 8.8 143 13.2 12.8 103
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Basin Index (%) 108 105
WIND RIVER
Burroughs Creek 8750 10.3 -M * 11.2 -M *
Castle Creek 8400 5.3 6.0 88 7.4 9.0 82
Cold Springs 9630 7.6 6.9 110 10.6 9.7 109
Deer Park 9700 24.3 15.2 160 25.6 18.7 137
Hobbs Park 10100 16.8 15.4 109 16.4 14.2 115
Kirwin 9550 9.8 11.2 88 13.4 12.4 108
Little Warm 9370 10.8 9.8 110 13.5 12.0 112
South Pass 9040 19.8 15.6 127 20.7 16.4 126
St. Lawrence Alt 8620 7.4 -M * 11.3 -M *
Togwotee Pass 9580 22.7 23.9 95 21.8 25.0 87
Townsend Creek 8700 12.4 9.9 125 14.6 12.5 117
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Basin Index (%) 114 111
BIGHORN BASIN
Bald Mtn. 9380 19.8 19.6 101 15.7 16.4 96
Bear Trap Meadow 8200 8.8 5.6 157 10.1 9.4 107
Bone Springs Div 9350 16.2 18.0 90 12.6 16.3 77
Grave Springs 8550 9.6 8.8 109 11.8 10.2 116
Kirwin 9550 9.8 11.2 88 13.4 12.4 108
Marquette 8760 8.8 7.6 116 10.6 10.0 106
Middle Powder 7760 12.2 11.4 107 10.7 10.2 105
Owl Creek 8975 7.2 5.4 133 9.2 6.6 139
Powder River Pass 9480 9.9 10.6 93 14.0 13.3 105
Shell Creek 9580 14.3 16.1 89 14.4 14.2 101
Timber Creek 7950 5.8 5.2 112 8.1 8.3 98
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Basin Index (%) 102 103
SHOSHONE RIVER
Blackwater 9780 22.4 24.0 93 23.0 22.6 102
Evening Star 9200 26.9 25.4 106 29.4 28.6 103
Marquette 8760 8.8 7.6 116 10.6 10.0 106
Sylvan Lake 8420 19.9 20.0 100 24.3 23.6 103
Sylvan Road 7120 -M 10.2 * -M 16.5 *
Younts Peak 8350 16.4 14.4 114 14.0 15.2 92
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Basin Index (%) 103 101
POWDER RIVER
Bear Trap Meadow 8200 8.8 5.6 157 10.1 9.4 107
Cloud Peak Reservoir 9860 15.8 15.2 104 15.4 14.2 108
Grave Springs 8550 9.6 8.8 109 11.8 10.2 116
Hansen Sawmill 8360 7.8 6.2 126 9.7 8.8 110
Middle Powder 7760 12.2 11.4 107 10.7 10.2 105
Powder River Pass 9480 9.9 10.6 93 14.0 13.3 105
Soldier Park 8720 8.1 6.1 133 9.3 10.0 93
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Basin Index (%) 113 106
TONGUE RIVER
Big Goose 7990 10.1 9.0 112 11.4 10.6 108
Bone Springs Div 9350 16.2 18.0 90 12.6 16.3 77
Burgess Junction 7880 12.3 11.4 108 14.3 12.6 113
Dome Lake 8880 11.1 11.8 94 12.6 13.6 93
Little Goose 8870 10.5 10.4 101 12.6 12.8 98
Sucker Creek 8880 12.6 12.5 101 17.2 14.8 116
Tie Creek 6870 8.6 4.4 195 13.7 11.4 120
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Basin Index (%) 105 102
BELLE FOURCHE
Blind Park 6890 7.2 5.1 141 11.8 11.9 99
Cole Canyon 5910 7.2 3.7 195 11.1 9.6 116
North Rapid Creek 6130 6.6 5.8 114 9.8 9.5 103
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Basin Index (%) 144 105
CHEYENNE RIVER BASIN
Blind Park 6890 7.2 5.1 141 11.8 11.9 99
North Rapid Creek 6130 6.6 5.8 114 9.8 9.5 103
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Basin Index (%) 127 101
UPPER N. PLATTE
Arapaho Ridge 10976 24.2 22.8 106 24.7 22.4 110
Blackhall Mtn 9839 37.4 30.6 122 38.3 30.4 126
Cinnabar Park 9707 -M 20.8 * 23.4 24.0 98
Columbine 9167 29.4 22.0 134 27.4 25.9 106
Divide Peak 8730 28.1 20.0 140 29.7 21.8 136
Joe Wright 10158 26.5 21.6 123 28.2 26.2 108
Laprele Creek 8390 11.5 9.0 128 13.9 12.2 114
Med Bow 10512 39.2 -M * 34.8 -M *
Never Summer 10323 26.1 20.8 125 19.0 17.8 107
North French Creek 10153 29.7 31.2 95 29.9 28.0 107
Old Battle 9860 42.6 32.2 132 -M 35.4 *
Rawah 9069 13.1 10.3 127 17.2 16.2 106
Sage Creek Basin 7850 25.8 11.2 230 20.8 13.3 156
Sand Lake 10098 28.8 29.4 98 28.2 26.0 108
South Brush Creek 8495 13.7 10.2 134 14.7 14.1 104
Tower 10620 52.5 45.0 117 48.8 40.8 120
Webber Springs 9260 30.1 21.6 139 33.2 25.9 128
Whiskey Park 9020 40.2 26.6 151 36.2 28.0 129
Willow Creek Pass 9523 18.3 14.0 131 17.8 14.0 127
Zirkel 9338 33.3 25.6 130 35.7 31.0 115
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Basin Index (%) 127 117
SWEETWATER
Deer Park 9700 24.3 15.2 160 25.6 18.7 137
Larsen Creek 9000 11.4 8.5 134 15.0 14.0 107
South Pass 9040 19.8 15.6 127 20.7 16.4 126
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Basin Index (%) 141 125
LOWER N. PLATTE
Casper Mtn. 7920 14.8 13.7 108 14.8 14.2 104
Laprele Creek 8390 11.5 9.0 128 13.9 12.2 114
Reno Hill 8430 16.3 14.4 113 17.5 16.2 108
Windy Peak 7915 11.0 7.4 149 13.0 10.5 124
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Basin Index (%) 120 111
LARAMIE RIVER
Brooklyn Lake 10250 24.6 22.6 109 26.2 22.6 116
Cinnabar Park 9707 -M 20.8 * 23.4 24.0 98
Crow Creek 8335 4.2 5.0 84 9.3 10.9 85
Deadman Hill 10239 19.4 16.8 115 18.6 18.5 101
Rawah 9069 13.1 10.3 127 17.2 16.2 106
Roach 9740 17.6 15.6 113 21.3 19.8 108
Windy Peak 7915 11.0 7.4 149 13.0 10.5 124
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Basin Index (%) 116 105
S. PLATTE
Crow Creek 8335 4.2 5.0 84 9.3 10.9 85
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Basin Index (%) 84 85
LITTLE SNAKE RIVER
Battle Mountain 7498 16.2 8.2 198 23.0 15.6 147
Divide Peak 8730 28.1 20.0 140 29.7 21.8 136
Elk River 8739 27.2 17.0 160 28.0 20.0 140
Elkhead Divide 8800 31.7 -M * 31.8 -M *
Little Snake River 8928 37.4 26.2 143 43.4 32.8 132
Old Battle 9860 42.6 32.2 132 -M 35.4 *
Sage Creek Basin 7850 25.8 11.2 230 20.8 13.3 156
Sandstone RS 8152 25.8 12.2 211 25.6 18.3 140
Whiskey Park 9020 40.2 26.6 151 36.2 28.0 129
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Basin Index (%) 158 138
UPPER GREEN RIVER
Big Sandy Opening 9080 15.4 13.4 115 15.8 13.5 117
Blind Bull Sum 8650 27.6 24.5 113 19.5 17.8 110
East Rim Divide 7930 11.9 10.0 119 12.3 11.4 108
Elkhart Park G.S. 9400 12.6 12.8 98 12.3 12.9 95
Gros Ventre Summit 8750 12.7 12.8 99 11.7 12.4 94
Gunsight Pass 9820 13.7 12.8 107 13.6 14.4 94
Indian Creek 9425 29.6 23.5 126 25.2 19.8 127
Kendall R.S. 7740 12.3 10.2 121 13.5 13.3 102
Larsen Creek 9000 11.4 8.5 134 15.0 14.0 107
Loomis Park 8240 17.0 14.8 115 17.3 17.0 102
New Fork Lake 8340 11.1 9.9 112 -M 10.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.1 11.8 119 16.6 14.0 119
Spring Creek Divide 9000 31.6 25.1 126 -M 23.6 *
Triple Peak 8500 26.2 22.4 117 27.1 25.6 106
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Basin Index (%) 116 107
LOWER GREEN RIVER
Blacks Fork Jct 8869 13.1 7.6 172 15.1 12.4 122
Buck Pasture 9632 21.5 -M * 22.4 -M *
EF Blacks Fork GS 9360 13.9 11.8 118 12.3 11.4 108
Hams Fork 7840 16.9 9.2 184 15.5 11.2 138
Henrys Fork 10182 -M -M * 16.0 -M *
Hewinta 9500 12.2 9.8 124 17.0 13.6 125
Hickerson Park 9122 11.6 6.8 171 13.2 10.8 122
Hole-in-Rock 9168 9.0 7.2 125 12.7 10.4 122
Indian Creek 9425 29.6 23.5 126 25.2 19.8 127
Kelley R.S. 8180 21.7 14.6 149 22.6 16.4 138
Spirit Lk 10235 21.7 13.6 160 21.6 18.1 119
Steel Creek Park 10158 20.8 15.4 135 20.7 16.8 123
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Basin Index (%) 143 125
UPPER BEAR RIVER
Bear River RS 8777 12.6 6.9 183 16.6 12.2 136
Bug Lake 7987 30.9 18.4 168 25.6 18.4 139
Burts Miller Ranch 8000 8.8 2.3 383 14.8 8.1 183
Chalk Creek #1 9171 34.5 23.1 149 32.9 23.4 141
Giveout 6930 15.1 5.4 280 16.0 12.7 126
Hayden Fork 9130 23.2 14.2 163 28.6 21.1 136
Kelley R.S. 8180 21.7 14.6 149 22.6 16.4 138
Lily Lake 9133 14.9 12.6 118 18.0 15.6 115
Monte Cristo 8932 45.0 27.2 165 41.5 26.4 157
Salt River Summit 7640 20.6 12.0 172 20.7 16.4 126
Spring Creek Divide 9000 31.6 25.1 126 -M 23.6 *
Trial Lake 9992 38.7 22.2 174 35.2 22.6 156
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Basin Index (%) 162 141
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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.
