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 10 , 2023
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 19.6 15.6 126 21.1 20.2 104
Blind Bull Sum 8650 27.3 24.6 111 18.8 17.7 106
Cottonwood Creek 7670 25.4 21.0 121 28.6 25.4 113
East Rim Divide 7930 12.7 10.2 125 12.3 11.2 110
Grand Targhee 9260 45.6 44.6 102 -M 32.0 *
Granite Creek 6770 19.8 14.4 138 16.1 18.6 87
Grassy Lake 7265 36.3 32.5 112 39.3 35.3 111
Gros Ventre Summit 8750 12.8 12.8 100 11.8 12.2 97
Gunsight Pass 9820 14.5 13.1 111 13.5 14.1 96
Lewis Lake Divide 7850 38.1 31.2 122 40.2 33.2 121
Loomis Park 8240 17.6 15.0 117 17.3 16.8 103
Phillips Bench 8200 30.6 26.3 116 31.1 26.6 117
Salt River Summit 7640 21.5 12.6 171 20.5 16.3 126
Snake River Station 6920 20.4 15.6 131 23.1 22.5 103
Somsen Ranch 6800 -M 9.8 * -M 16.6 *
Spring Creek Divide 9000 29.3 25.1 117 21.8 23.6 92
Thumb Divide 7980 21.0 16.4 128 19.6 17.8 110
Togwotee Pass 9580 23.4 23.7 99 21.7 24.7 88
Triple Peak 8500 27.9 23.2 120 27.0 25.2 107
Two Ocean Plateau 9240 32.4 30.4 107 27.1 27.0 100
Willow Creek 8080 41.1 29.6 139 37.0 33.3 111
Younts Peak 8350 17.0 14.6 116 13.9 14.9 93
----- -----
Basin Index (%) 118 106
MADISON HEADWATERS IN WYOMING
Black Bear 8170 44.4 38.2 116 43.7 37.3 117
Canyon 7870 14.7 -M * 17.2 -M *
Madison Plateau 7750 31.2 23.0 136 30.2 25.0 121
West Yellowstone 6700 17.0 9.0 189 19.7 14.0 141
Whiskey Creek 6800 22.0 14.8 149 26.6 20.2 132
----- -----
Basin Index (%) 135 125
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 19.8 22.0 90 18.7 20.2 93
Canyon 7870 14.7 -M * 17.2 -M *
Evening Star 9200 27.1 25.2 108 28.9 28.3 102
Fisher Creek 9100 35.1 33.6 104 35.7 33.5 107
Monument Peak 8850 22.8 21.2 108 24.7 21.6 114
Northeast Entrance 7350 10.1 8.4 120 12.6 13.0 97
Parker Peak 9400 25.7 21.4 120 24.3 20.2 120
Sylvan Lake 8420 20.7 19.5 106 24.0 23.6 102
Thumb Divide 7980 21.0 16.4 128 19.6 17.8 110
Two Ocean Plateau 9240 32.4 30.4 107 27.1 27.0 100
White Mill 8700 24.8 24.8 100 23.8 23.0 103
Wolverine 7650 13.6 9.0 151 13.0 12.8 102
----- -----
Basin Index (%) 109 105
WIND RIVER
Burroughs Creek 8750 11.9 -M * 11.3 -M *
Castle Creek 8400 6.8 6.0 113 7.5 8.8 85
Cold Springs 9630 8.8 6.8 129 10.6 9.6 110
Deer Park 9700 25.4 15.6 163 25.6 18.5 138
Hobbs Park 10100 17.4 14.4 121 16.4 13.8 119
Kirwin 9550 11.4 10.8 106 13.5 12.2 111
Little Warm 9370 11.6 10.0 116 13.4 11.8 114
South Pass 9040 20.7 15.0 138 20.5 16.2 127
St. Lawrence Alt 8620 8.8 -M * 11.1 -M *
Togwotee Pass 9580 23.4 23.7 99 21.7 24.7 88
Townsend Creek 8700 13.4 9.7 138 14.6 11.3 129
----- -----
Basin Index (%) 124 113
BIGHORN BASIN
Bald Mtn. 9380 19.6 19.8 99 15.7 16.2 97
Bear Trap Meadow 8200 9.8 5.6 175 10.1 9.1 111
Bone Springs Div 9350 16.1 17.7 91 12.6 16.0 79
Grave Springs 8550 10.9 8.4 130 11.8 9.8 120
Kirwin 9550 11.4 10.8 106 13.5 12.2 111
Marquette 8760 10.0 7.5 133 10.8 9.5 114
Middle Powder 7760 13.2 11.2 118 10.7 10.0 107
Owl Creek 8975 8.5 5.6 152 9.2 6.4 144
Powder River Pass 9480 10.9 10.7 102 13.9 13.0 107
Shell Creek 9580 14.3 15.8 91 14.4 13.9 104
Timber Creek 7950 6.9 5.2 133 8.1 7.8 104
----- -----
Basin Index (%) 111 106
SHOSHONE RIVER
Blackwater 9780 22.1 23.6 94 22.4 22.6 99
Evening Star 9200 27.1 25.2 108 28.9 28.3 102
Marquette 8760 10.0 7.5 133 10.8 9.5 114
Sylvan Lake 8420 20.7 19.5 106 24.0 23.6 102
Sylvan Road 7120 10.9 10.4 105 14.7 16.2 91
Younts Peak 8350 17.0 14.6 116 13.9 14.9 93
----- -----
Basin Index (%) 107 100
POWDER RIVER
Bear Trap Meadow 8200 9.8 5.6 175 10.1 9.1 111
Cloud Peak Reservoir 9860 15.8 14.8 107 15.3 13.8 111
Grave Springs 8550 10.9 8.4 130 11.8 9.8 120
Hansen Sawmill 8360 9.2 6.1 151 9.7 8.6 113
Middle Powder 7760 13.2 11.2 118 10.7 10.0 107
Powder River Pass 9480 10.9 10.7 102 13.9 13.0 107
Soldier Park 8720 10.0 7.1 141 9.3 9.4 99
----- -----
Basin Index (%) 125 110
TONGUE RIVER
Big Goose 7990 11.0 8.9 124 11.4 10.4 110
Bone Springs Div 9350 16.1 17.7 91 12.6 16.0 79
Burgess Junction 7880 13.1 11.4 115 14.5 12.6 115
Dome Lake 8880 12.3 12.0 102 12.5 13.2 95
Little Goose 8870 12.0 9.8 122 12.6 12.4 102
Sucker Creek 8880 14.5 12.6 115 17.2 14.4 119
Tie Creek 6870 10.3 4.6 224 13.7 11.0 125
----- -----
Basin Index (%) 116 105
BELLE FOURCHE
Blind Park 6890 9.5 6.1 156 11.8 11.4 104
Cole Canyon 5910 8.9 4.2 212 11.0 9.5 116
North Rapid Creek 6130 8.1 5.8 140 9.7 9.2 105
----- -----
Basin Index (%) 165 108
CHEYENNE RIVER BASIN
Blind Park 6890 9.5 6.1 156 11.8 11.4 104
North Rapid Creek 6130 8.1 5.8 140 9.7 9.2 105
----- -----
Basin Index (%) 148 104
UPPER N. PLATTE
Arapaho Ridge 10976 26.3 22.5 117 24.7 22.2 111
Blackhall Mtn 9839 40.9 30.3 135 38.4 29.7 129
Cinnabar Park 9707 -M 20.3 * 23.5 23.6 100
Columbine 9167 31.9 22.6 141 27.4 25.8 106
Divide Peak 8730 30.0 19.8 152 29.7 21.8 136
Joe Wright 10158 26.6 21.4 124 28.2 26.1 108
Laprele Creek 8390 12.9 9.2 140 13.9 11.8 118
Med Bow 10512 41.2 -M * -M -M *
Never Summer 10323 26.4 20.6 128 19.0 17.8 107
North French Creek 10153 32.3 30.2 107 29.9 27.6 108
Old Battle 9860 42.8 31.7 135 -M 35.2 *
Rawah 9069 15.2 10.4 146 17.2 16.0 108
Sage Creek Basin 7850 -M 11.2 * 20.8 13.3 156
Sand Lake 10098 29.7 28.5 104 28.2 25.6 110
South Brush Creek 8495 15.8 10.8 146 14.7 13.8 107
Tower 10620 53.0 44.2 120 -M 40.0 *
Webber Springs 9260 31.5 22.5 140 33.2 25.6 130
Whiskey Park 9020 42.9 27.0 159 36.2 27.8 130
Willow Creek Pass 9523 18.3 13.4 137 17.8 13.7 130
Zirkel 9338 35.3 27.4 129 35.6 30.8 116
----- -----
Basin Index (%) 130 118
SWEETWATER
Deer Park 9700 25.4 15.6 163 25.6 18.5 138
Larsen Creek 9000 12.1 8.9 136 15.0 13.5 111
South Pass 9040 20.7 15.0 138 20.5 16.2 127
----- -----
Basin Index (%) 147 127
LOWER N. PLATTE
Casper Mtn. 7920 15.9 13.7 116 14.8 13.8 107
Laprele Creek 8390 12.9 9.2 140 13.9 11.8 118
Reno Hill 8430 16.9 14.2 119 17.5 15.5 113
Windy Peak 7915 -M 7.6 * -M 10.4 *
----- -----
Basin Index (%) 123 112
LARAMIE RIVER
Brooklyn Lake 10250 26.3 22.4 117 26.2 22.2 118
Cinnabar Park 9707 -M 20.3 * 23.5 23.6 100
Crow Creek 8335 5.9 4.8 123 9.3 10.7 87
Deadman Hill 10239 20.2 16.4 123 18.7 18.1 103
Rawah 9069 15.2 10.4 146 17.2 16.0 108
Roach 9740 18.6 15.4 121 21.2 19.2 110
Windy Peak 7915 -M 7.6 * -M 10.4 *
----- -----
Basin Index (%) 124 106
S. PLATTE
Crow Creek 8335 5.9 4.8 123 9.3 10.7 87
----- -----
Basin Index (%) 123 87
LITTLE SNAKE RIVER
Battle Mountain 7498 18.5 9.1 203 23.0 15.2 151
Divide Peak 8730 30.0 19.8 152 29.7 21.8 136
Elk River 8739 29.5 17.2 172 28.0 19.6 143
Elkhead Divide 8800 34.1 -M * 31.8 -M *
Little Snake River 8928 40.1 26.5 151 -M 32.8 *
Old Battle 9860 42.8 31.7 135 -M 35.2 *
Sage Creek Basin 7850 -M 11.2 * 20.8 13.3 156
Sandstone RS 8152 -M 12.9 * 25.8 18.2 142
Whiskey Park 9020 42.9 27.0 159 36.2 27.8 130
----- -----
Basin Index (%) 155 141
UPPER GREEN RIVER
Big Sandy Opening 9080 14.9 13.4 111 15.8 13.5 117
Blind Bull Sum 8650 27.3 24.6 111 18.8 17.7 106
East Rim Divide 7930 12.7 10.2 125 12.3 11.2 110
Elkhart Park G.S. 9400 12.9 13.0 99 12.2 12.8 95
Gros Ventre Summit 8750 12.8 12.8 100 11.8 12.2 97
Gunsight Pass 9820 14.5 13.1 111 13.5 14.1 96
Indian Creek 9425 29.8 23.6 126 25.2 19.7 128
Kendall R.S. 7740 13.6 10.4 131 13.5 13.2 102
Larsen Creek 9000 12.1 8.9 136 15.0 13.5 111
Loomis Park 8240 17.6 15.0 117 17.3 16.8 103
New Fork Lake 8340 11.8 10.4 113 -M 10.7 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 15.4 12.6 122 16.6 13.9 119
Spring Creek Divide 9000 29.3 25.1 117 21.8 23.6 92
Triple Peak 8500 27.9 23.2 120 27.0 25.2 107
----- -----
Basin Index (%) 117 106
LOWER GREEN RIVER
Blacks Fork Jct 8869 14.7 8.2 179 15.1 12.2 124
Buck Pasture 9632 22.0 -M * 22.4 -M *
EF Blacks Fork GS 9360 15.3 11.0 139 12.1 11.0 110
Hams Fork 7840 16.4 10.2 161 15.4 11.1 139
Henrys Fork 10182 -M -M * 16.0 -M *
Hewinta 9500 14.4 10.4 138 16.9 13.4 126
Hickerson Park 9122 12.4 7.4 168 13.2 10.6 125
Hole-in-Rock 9168 11.7 7.1 165 12.7 10.4 122
Indian Creek 9425 29.8 23.6 126 25.2 19.7 128
Kelley R.S. 8180 22.3 14.4 155 22.6 16.3 139
Spirit Lk 10235 22.8 14.1 162 21.6 17.0 127
Steel Creek Park 10158 21.0 15.1 139 20.6 16.8 123
----- -----
Basin Index (%) 149 127
UPPER BEAR RIVER
Bear River RS 8777 15.5 7.8 199 16.6 12.0 138
Bug Lake 7987 31.8 18.4 173 25.6 18.4 139
Burts Miller Ranch 8000 11.5 3.8 303 14.8 8.0 185
Chalk Creek #1 9171 -M 22.6 * -M 23.0 *
Giveout 6930 16.2 6.9 235 16.0 12.4 129
Hayden Fork 9130 25.2 14.4 175 28.6 20.8 138
Kelley R.S. 8180 22.3 14.4 155 22.6 16.3 139
Lily Lake 9133 16.8 12.7 132 17.9 15.3 117
Monte Cristo 8932 45.6 27.4 166 41.5 26.4 157
Salt River Summit 7640 21.5 12.6 171 20.5 16.3 126
Spring Creek Divide 9000 29.3 25.1 117 21.8 23.6 92
Trial Lake 9992 38.3 22.3 172 34.9 22.4 156
----- -----
Basin Index (%) 165 136
-----------------------------------------------------------------------------
-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.
----------------------------------------------------------------------------
-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.
