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 SATURDAY: APRIL 29 , 2023
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 17.3 11.0 157 22.5 22.2 101
Blind Bull Sum 8650 28.1 24.6 114 -M 19.2 *
Cottonwood Creek 7670 26.6 17.8 149 31.1 27.8 112
East Rim Divide 7930 9.5 7.0 136 13.0 12.2 107
Grand Targhee 9260 50.6 47.6 106 -M 35.8 *
Granite Creek 6770 16.1 10.0 161 16.2 20.4 79
Grassy Lake 7265 36.9 30.0 123 42.3 38.3 110
Gros Ventre Summit 8750 12.7 12.7 100 12.0 14.2 85
Gunsight Pass 9820 15.2 13.0 117 14.9 16.0 93
Lewis Lake Divide 7850 38.8 31.4 124 42.8 36.4 118
Loomis Park 8240 15.3 11.8 130 18.0 17.8 101
Phillips Bench 8200 30.2 27.7 109 32.2 28.4 113
Salt River Summit 7640 20.4 9.0 227 21.9 17.6 124
Snake River Station 6920 16.8 10.9 154 24.7 24.2 102
Somsen Ranch 6800 17.9 2.6 688 23.2 17.9 130
Spring Creek Divide 9000 31.3 25.4 123 -M 25.2 *
Thumb Divide 7980 20.7 14.4 144 20.7 20.6 100
Togwotee Pass 9580 24.0 25.2 95 23.3 26.8 87
Triple Peak 8500 26.8 19.5 137 28.4 27.8 102
Two Ocean Plateau 9240 35.4 33.0 107 30.0 29.0 103
Willow Creek 8080 40.6 27.8 146 40.2 36.6 110
Younts Peak 8350 15.4 14.6 105 14.7 17.0 86
----- -----
Basin Index (%) 128 105
MADISON HEADWATERS IN WYOMING
Black Bear 8170 45.5 40.2 113 47.0 40.4 116
Canyon 7870 15.1 -M * 18.8 -M *
Madison Plateau 7750 33.8 23.2 146 32.0 27.6 116
West Yellowstone 6700 12.7 2.2 577 20.4 15.6 131
Whiskey Creek 6800 22.2 14.6 152 27.7 22.3 124
----- -----
Basin Index (%) 142 120
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 21.3 24.0 89 20.3 22.4 91
Canyon 7870 15.1 -M * 18.8 -M *
Evening Star 9200 28.0 27.2 103 31.3 31.1 101
Fisher Creek 9100 36.8 36.0 102 38.1 36.3 105
Monument Peak 8850 24.1 22.2 109 26.7 24.8 108
Northeast Entrance 7350 7.3 3.6 203 13.9 14.2 98
Parker Peak 9400 30.0 23.6 127 26.8 22.3 120
Sylvan Lake 8420 21.0 20.6 102 26.1 26.0 100
Thumb Divide 7980 20.7 14.4 144 20.7 20.6 100
Two Ocean Plateau 9240 35.4 33.0 107 30.0 29.0 103
White Mill 8700 26.9 25.8 104 25.5 25.1 102
Wolverine 7650 12.4 4.7 264 14.4 13.5 107
----- -----
Basin Index (%) 112 103
WIND RIVER
Burroughs Creek 8750 8.7 -M * 11.7 -M *
Castle Creek 8400 2.8 .8 350 8.1 9.4 86
Cold Springs 9630 7.1 4.6 154 12.1 11.2 108
Deer Park 9700 26.0 15.3 170 28.6 21.1 136
Hobbs Park 10100 19.6 16.2 121 19.7 16.1 122
Kirwin 9550 12.0 12.0 100 14.8 14.2 104
Little Warm 9370 10.9 9.4 116 14.6 13.2 111
South Pass 9040 21.3 15.0 142 22.8 18.1 126
St. Lawrence Alt 8620 7.9 -M * 12.9 -M *
Togwotee Pass 9580 24.0 25.2 95 23.3 26.8 87
Townsend Creek 8700 14.2 9.2 154 16.9 13.3 127
----- -----
Basin Index (%) 128 112
BIGHORN BASIN
Bald Mtn. 9380 20.3 20.9 97 17.2 18.2 95
Bear Trap Meadow 8200 6.4 3.2 200 11.0 10.6 104
Bone Springs Div 9350 18.0 17.5 103 14.0 18.0 78
Grave Springs 8550 9.4 8.6 109 12.7 11.8 108
Kirwin 9550 12.0 12.0 100 14.8 14.2 104
Marquette 8760 10.0 8.2 122 12.3 11.8 104
Middle Powder 7760 12.5 11.9 105 11.4 12.0 95
Owl Creek 8975 3.8 2.0 190 10.4 8.2 127
Powder River Pass 9480 9.9 10.2 97 15.5 15.2 102
Shell Creek 9580 15.4 16.3 94 16.1 15.8 102
Timber Creek 7950 5.9 3.4 174 9.3 9.6 97
----- -----
Basin Index (%) 108 100
SHOSHONE RIVER
Blackwater 9780 24.2 25.2 96 24.7 24.8 100
Evening Star 9200 28.0 27.2 103 31.3 31.1 101
Marquette 8760 10.0 8.2 122 12.3 11.8 104
Sylvan Lake 8420 21.0 20.6 102 26.1 26.0 100
Sylvan Road 7120 5.0 6.2 81 16.2 17.9 91
Younts Peak 8350 15.4 14.6 105 14.7 17.0 86
----- -----
Basin Index (%) 102 97
POWDER RIVER
Bear Trap Meadow 8200 6.4 3.2 200 11.0 10.6 104
Cloud Peak Reservoir 9860 15.9 15.7 101 16.8 16.4 102
Grave Springs 8550 9.4 8.6 109 12.7 11.8 108
Hansen Sawmill 8360 7.5 4.0 188 10.6 10.4 102
Middle Powder 7760 12.5 11.9 105 11.4 12.0 95
Powder River Pass 9480 9.9 10.2 97 15.5 15.2 102
Soldier Park 8720 7.6 5.0 152 10.1 11.2 90
----- -----
Basin Index (%) 118 101
TONGUE RIVER
Big Goose 7990 10.3 8.6 120 12.2 12.6 97
Bone Springs Div 9350 18.0 17.5 103 14.0 18.0 78
Burgess Junction 7880 13.4 12.2 110 15.1 14.7 103
Dome Lake 8880 11.8 11.0 107 13.7 15.7 87
Little Goose 8870 10.6 10.4 102 13.7 15.6 88
Sucker Creek 8880 13.7 12.6 109 18.6 16.9 110
Tie Creek 6870 7.4 2.6 285 14.6 13.6 107
----- -----
Basin Index (%) 114 95
BELLE FOURCHE
Blind Park 6890 3.4 1.0 340 12.9 13.2 98
Cole Canyon 5910 4.5 1.0 450 12.1 11.5 105
North Rapid Creek 6130 3.1 .9 344 10.6 10.7 99
----- -----
Basin Index (%) 379 101
CHEYENNE RIVER BASIN
Blind Park 6890 3.4 1.0 340 12.9 13.2 98
North Rapid Creek 6130 3.1 .9 344 10.6 10.7 99
----- -----
Basin Index (%) 342 98
UPPER N. PLATTE
Arapaho Ridge 10976 28.4 23.8 119 27.5 25.0 110
Blackhall Mtn 9839 39.3 31.6 124 41.2 34.3 120
Cinnabar Park 9707 -M 19.4 * 25.6 25.9 99
Columbine 9167 25.9 18.4 141 29.3 28.6 102
Divide Peak 8730 29.7 17.6 169 31.8 24.6 129
Joe Wright 10158 27.7 22.0 126 31.0 29.6 105
Laprele Creek 8390 11.5 6.4 180 15.4 14.4 107
Med Bow 10512 42.0 -M * 38.4 -M *
Never Summer 10323 28.1 22.1 127 21.1 19.2 110
North French Creek 10153 32.2 31.8 101 33.2 32.4 102
Old Battle 9860 45.0 35.6 126 45.5 38.1 119
Rawah 9069 12.9 7.2 179 19.3 18.9 102
Sage Creek Basin 7850 22.2 2.5 888 22.0 14.4 153
Sand Lake 10098 31.4 31.0 101 31.6 28.8 110
South Brush Creek 8495 11.9 7.6 157 16.4 15.8 104
Tower 10620 52.7 45.9 115 54.2 45.0 120
Webber Springs 9260 30.7 21.6 142 35.3 29.0 122
Whiskey Park 9020 39.1 26.4 148 38.7 31.8 122
Willow Creek Pass 9523 20.4 15.6 131 19.6 15.7 125
Zirkel 9338 30.8 24.2 127 37.7 34.6 109
----- -----
Basin Index (%) 133 114
SWEETWATER
Deer Park 9700 26.0 15.3 170 28.6 21.1 136
Larsen Creek 9000 11.7 3.6 325 16.9 15.6 108
South Pass 9040 21.3 15.0 142 22.8 18.1 126
----- -----
Basin Index (%) 174 125
LOWER N. PLATTE
Casper Mtn. 7920 12.9 13.1 98 15.7 17.4 90
Laprele Creek 8390 11.5 6.4 180 15.4 14.4 107
Reno Hill 8430 17.2 13.6 126 19.3 18.2 106
Windy Peak 7915 11.2 4.4 255 14.1 12.4 114
----- -----
Basin Index (%) 141 103
LARAMIE RIVER
Brooklyn Lake 10250 26.2 23.1 113 28.8 24.9 116
Cinnabar Park 9707 -M 19.4 * 25.6 25.9 99
Crow Creek 8335 1.5 .8 188 10.7 12.4 86
Deadman Hill 10239 21.8 19.7 111 21.5 21.0 102
Rawah 9069 12.9 7.2 179 19.3 18.9 102
Roach 9740 18.3 16.0 114 23.4 21.4 109
Windy Peak 7915 11.2 4.4 255 14.1 12.4 114
----- -----
Basin Index (%) 129 105
S. PLATTE
Crow Creek 8335 1.5 .8 188 10.7 12.4 86
----- -----
Basin Index (%) 188 86
LITTLE SNAKE RIVER
Battle Mountain 7498 11.0 .2 5500* 24.2 17.4 139
Divide Peak 8730 29.7 17.6 169 31.8 24.6 129
Elk River 8739 23.9 13.3 180 30.3 22.2 136
Elkhead Divide 8800 30.3 -M * 33.6 -M *
Little Snake River 8928 38.6 24.0 161 45.8 36.4 126
Old Battle 9860 45.0 35.6 126 45.5 38.1 119
Sage Creek Basin 7850 22.2 2.5 888 22.0 14.4 153
Sandstone RS 8152 19.8 6.4 309 27.0 19.6 138
Whiskey Park 9020 39.1 26.4 148 38.7 31.8 122
----- -----
Basin Index (%) 182 130
UPPER GREEN RIVER
Big Sandy Opening 9080 16.2 12.2 133 17.4 14.8 118
Blind Bull Sum 8650 28.1 24.6 114 -M 19.2 *
East Rim Divide 7930 9.5 7.0 136 13.0 12.2 107
Elkhart Park G.S. 9400 12.7 11.9 107 13.2 13.8 96
Gros Ventre Summit 8750 12.7 12.7 100 12.0 14.2 85
Gunsight Pass 9820 15.2 13.0 117 14.9 16.0 93
Indian Creek 9425 30.4 22.6 135 26.4 21.0 126
Kendall R.S. 7740 10.6 5.2 204 14.2 14.4 99
Larsen Creek 9000 11.7 3.6 325 16.9 15.6 108
Loomis Park 8240 15.3 11.8 130 18.0 17.8 101
New Fork Lake 8340 9.8 6.6 148 -M 11.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 13.1 7.7 170 17.3 15.0 115
Spring Creek Divide 9000 31.3 25.4 123 -M 25.2 *
Triple Peak 8500 26.8 19.5 137 28.4 27.8 102
----- -----
Basin Index (%) 132 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 13.2 4.4 300 16.2 14.1 115
Buck Pasture 9632 22.2 -M * 23.8 -M *
EF Blacks Fork GS 9360 12.5 7.8 160 13.5 13.3 102
Hams Fork 7840 13.0 4.2 310 16.2 11.8 137
Henrys Fork 10182 -M -M * 17.1 -M *
Hewinta 9500 11.8 6.6 179 18.0 15.6 115
Hickerson Park 9122 9.7 4.4 220 14.1 12.0 118
Hole-in-Rock 9168 9.8 3.4 288 13.4 11.6 116
Indian Creek 9425 30.4 22.6 135 26.4 21.0 126
Kelley R.S. 8180 21.7 11.8 184 23.7 17.8 133
Spirit Lk 10235 23.6 12.2 193 23.5 19.4 121
Steel Creek Park 10158 22.6 16.9 134 22.3 18.4 121
----- -----
Basin Index (%) 178 121
UPPER BEAR RIVER
Bear River RS 8777 10.9 1.5 727 17.4 13.8 126
Bug Lake 7987 30.9 15.2 203 26.9 19.4 139
Burts Miller Ranch 8000 6.2 .0 * 15.5 8.7 178
Chalk Creek #1 9171 36.4 21.2 172 34.2 25.6 134
Giveout 6930 13.5 .0 * 16.9 13.6 124
Hayden Fork 9130 23.4 9.9 236 30.0 23.1 130
Kelley R.S. 8180 21.7 11.8 184 23.7 17.8 133
Lily Lake 9133 14.2 10.4 137 18.8 17.8 106
Monte Cristo 8932 47.6 25.4 187 -M 28.0 *
Salt River Summit 7640 20.4 9.0 227 21.9 17.6 124
Spring Creek Divide 9000 31.3 25.4 123 -M 25.2 *
Trial Lake 9992 40.5 23.5 172 36.7 24.5 150
----- -----
Basin Index (%) 194 133
-----------------------------------------------------------------------------
-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.
