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 26 , 2018
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
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WYOMING
SNAKE RIVER
Base Camp 7060 15.2 10.6 143 24.9 22.2 112
Black Bear 8170 46.6 37.0 126 45.4 40.9 111
Blind Bull Sum 8650 37.4 24.2 155 22.1 20.8 106
Cottonwood Creek 7670 20.8 17.0 122 30.1 26.6 113
East Rim Divide 7930 6.9 8.9 78 13.5 12.5 108
Grand Targhee 9260 54.6 43.3 126 37.8 33.5 113
Granite Creek 6770 13.7 9.3 147 24.1 20.7 116
Grassy Lake 7265 31.5 30.1 105 40.0 38.4 104
Gros Ventre Summit 8750 15.9 12.3 129 17.1 14.1 121
Gunsight Pass 9820 18.4 13.4 137 18.9 15.5 122
Lewis Lake Divide 7850 44.4 30.7 145 -M 37.7 *
Phillips Bench 8200 32.2 25.5 126 32.3 29.9 108
Salt River Summit 7640 6.0 8.4 71 14.5 17.9 81
Snake River Station 6920 13.4 9.8 137 26.4 24.2 109
Spring Creek Divide 9000 29.0 23.9 121 27.3 25.5 107
Thumb Divide 7980 18.0 14.1 128 21.5 20.3 106
Togwotee Pass 9580 35.8 24.5 146 37.4 26.5 141
Two Ocean Plateau 9240 43.6 29.2 149 34.0 29.3 116
Willow Creek 8080 36.2 25.3 143 40.9 36.5 112
Younts Peak 8350 -M 15.1 * -M 17.1 *
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Basin Index (%) 131 112
MADISON-GALLATIN
Black Bear 8170 46.6 37.0 126 45.4 40.9 111
Canyon 7870 17.9 11.6 154 21.6 17.5 123
Madison Plateau 7750 30.1 22.4 134 30.5 28.2 108
West Yellowstone 6700 8.0 4.7 170 19.4 15.5 125
Whiskey Creek 6800 16.1 15.4 105 22.4 21.8 103
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Basin Index (%) 130 112
YELLOWSTONE
Beartooth Lake 9360 42.1 23.5 179 39.0 21.3 183
Burnt Mtn 5880 5.7 .0 * 17.3 14.9 116
Canyon 7870 17.9 11.6 154 21.6 17.5 123
Cole Creek 7850 17.0 16.3 104 14.4 15.5 93
Evening Star 9200 44.9 24.6 183 -M 29.6 *
Fisher Creek 9100 57.0 33.2 172 51.7 34.3 151
Northeast Entrance 7350 12.3 4.9 251 20.3 13.4 151
Parker Peak 9400 39.3 21.8 180 33.4 19.4 172
Sylvan Lake 8420 26.8 20.3 132 31.4 24.3 129
Thumb Divide 7980 18.0 14.1 128 21.5 20.3 106
Two Ocean Plateau 9240 43.6 29.2 149 34.0 29.3 116
White Mill 8700 45.3 23.8 190 35.7 25.6 139
Wolverine 7650 21.2 5.2 408 23.5 13.3 177
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Basin Index (%) 171 138
WIND RIVER
Burroughs Creek 8750 15.0 -M * 19.9 -M *
Castle Creek 8400 4.3 -M * 11.0 -M *
Cold Springs 9630 6.8 2.7 252 11.0 11.7 94
Deer Park 9700 11.9 16.3 73 16.7 22.8 73
Hobbs Park 10100 18.2 15.7 116 16.7 15.9 105
Kirwin 9550 19.3 10.2 189 20.2 13.1 154
Little Warm 9370 16.5 9.4 176 19.2 14.6 132
Owl Creek 8975 1.3 2.3 57 7.5 7.4 101
South Pass 9040 10.9 15.2 72 -M 19.6 *
St. Lawrence Alt 8620 .0 4.6 0 9.1 10.9 83
Togwotee Pass 9580 35.8 24.5 146 37.4 26.5 141
Townsend Creek 8700 5.1 8.7 59 10.3 14.3 72
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Basin Index (%) 115 108
BIGHORN BASIN
Bald Mtn. 9380 24.4 20.5 119 18.9 18.9 100
Bear Trap Meadow 8200 8.5 1.7 500 11.9 10.0 119
Bone Springs Div 9350 22.5 16.4 137 17.6 17.4 101
Grave Springs 8550 7.9 9.2 86 -M 12.3 *
Kirwin 9550 19.3 10.2 189 20.2 13.1 154
Marquette 8760 7.1 -M * 11.7 -M *
Middle Powder 7760 10.7 12.2 88 -M 13.5 *
Owl Creek 8975 1.3 2.3 57 7.5 7.4 101
Powder River Pass 9480 16.6 10.1 164 17.5 14.3 122
Shell Creek 9580 23.4 15.9 147 18.3 15.5 118
Timber Creek 7950 .1 3.6 3 -M 9.2 *
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Basin Index (%) 132 116
SHOSHONE RIVER
Blackwater 9780 37.7 24.6 153 35.6 22.7 157
Evening Star 9200 44.9 24.6 183 -M 29.6 *
Marquette 8760 7.1 -M * 11.7 -M *
Sylvan Road 7120 11.1 7.9 141 24.9 18.0 138
Younts Peak 8350 -M 15.1 * -M 17.1 *
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Basin Index (%) 164 149*
POWDER RIVER
Bear Trap Meadow 8200 8.5 1.7 500 11.9 10.0 119
Cloud Peak Reservoir 9860 17.2 16.4 105 16.8 15.8 106
Grave Springs 8550 7.9 9.2 86 -M 12.3 *
Hansen Sawmill 8360 8.4 4.1 205 12.1 10.3 117
Middle Powder 7760 10.7 12.2 88 -M 13.5 *
Powder River Pass 9480 16.6 10.1 164 17.5 14.3 122
Soldier Park 8720 6.7 -M * 11.6 -M *
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Basin Index (%) 129 116
TONGUE RIVER
Big Goose 7990 9.3 9.1 102 11.1 13.5 82
Bone Springs Div 9350 22.5 16.4 137 17.6 17.4 101
Burgess Junction 7880 11.7 12.4 94 10.8 14.1 77
Dome Lake 8880 16.0 11.8 136 14.9 15.6 96
Little Goose 8870 11.0 -M * 14.9 -M *
Sucker Creek 8880 12.1 12.6 96 11.9 16.6 72
Tie Creek 6870 3.9 3.2 122 11.4 13.6 84
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Basin Index (%) 115 86
BELLE FOURCHE
Cole Canyon 5910 5.3 .6 883 12.5 11.0 114
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Basin Index (%) 883 114
CHEYENNE RIVER BASIN
Blind Park 6890 5.0 3.2 156 13.6 13.7 99
North Rapid Creek 6130 3.7 3.1 119 10.9 11.7 93
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Basin Index (%) 138 96
UPPER N. PLATTE
Arapaho Ridge 10960 24.1 21.9 110 23.9 25.6 93
Blackhall Mtn 9820 28.5 -M * 30.0 -M *
Columbine 9160 22.7 20.3 112 28.7 27.8 103
Divide Peak 8880 11.9 18.0 66 20.2 23.7 85
Joe Wright 10120 23.3 23.4 100 33.9 29.0 117
Laprele Creek 8375 3.5 7.2 49 9.7 14.5 67
Med Bow 10500 45.1 -M * 37.8 -M *
North French Creek 10130 31.0 32.8 95 31.1 29.8 104
Never Summer 10280 22.4 21.3 105 18.8 -M *
Old Battle 10000 27.8 34.3 81 26.7 38.2 70
Rawah 9020 8.7 8.0 109 17.2 16.7 103
Sage Creek Basin 7850 -M 2.2 * 11.5 15.7 73
Sand Lake 10050 30.0 31.1 96 26.2 28.1 93
South Brush Creek 8440 5.2 10.0 52 13.6 17.2 79
Tower 10500 45.0 49.5 91 -M 43.6 *
Webber Springs 9250 16.5 21.9 75 23.7 29.2 81
Willow Creek Pass 9540 14.7 13.8 107 16.3 15.2 107
Zirkel 9340 22.8 22.1 103 34.5 30.4 113
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Basin Index (%) 92 93
SWEETWATER
Deer Park 9700 11.9 16.3 73 16.7 22.8 73
Larsen Creek 9000 7.1 9.7 73 12.2 -M *
South Pass 9040 10.9 15.2 72 -M 19.6 *
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Basin Index (%) 73 73*
LOWER N. PLATTE
Casper Mtn. 7900 7.6 14.2 54 8.1 17.3 47
Laprele Creek 8375 3.5 7.2 49 9.7 14.5 67
Reno Hill 8400 10.5 13.7 77 13.6 18.1 75
Windy Peak 7900 4.2 5.8 72 10.1 12.5 81
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Basin Index (%) 63 67
LARAMIE RIVER
Brooklyn Lake 10240 26.5 22.9 116 28.4 23.9 119
Cinnabar Park 9574 21.4 20.0 107 27.2 26.3 103
Crow Creek 8330 .1 .0 * 12.5 12.9 97
Deadman Hill 10220 22.5 18.3 123 22.0 20.0 110
Rawah 9020 8.7 8.0 109 17.2 16.7 103
Roach 9700 13.7 16.9 81 19.2 21.6 89
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Basin Index (%) 108 104
S. PLATTE
Black Mountain 8920 9.1 -M * 14.9 -M *
Crow Creek 8330 .1 .0 * 12.5 12.9 97
Deadman Hill 10220 22.5 18.3 123 22.0 20.0 110
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Basin Index (%) 123* 105
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 1.6 0 12.7 16.7 76
Divide Peak 8880 11.9 18.0 66 20.2 23.7 85
Elk River 8700 10.3 14.4 72 18.7 22.1 85
Little Snake River 8915 18.6 23.2 80 30.6 31.8 96
Old Battle 10000 27.8 34.3 81 26.7 38.2 70
Sage Creek Basin 7850 -M 2.2 * 11.5 15.7 73
Sandstone RS 8150 2.7 8.2 33 11.0 20.2 54
Whiskey Park 8950 23.1 25.6 90 28.6 30.7 93
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Basin Index (%) 75 80
UPPER GREEN RIVER
Big Sandy Opening 9080 12.0 12.0 100 14.1 14.7 96
Blind Bull Sum 8650 37.4 24.2 155 22.1 20.8 106
East Rim Divide 7930 6.9 8.9 78 13.5 12.5 108
Elkhart Park G.S. 9400 12.4 11.8 105 13.2 14.5 91
Gros Ventre Summit 8750 15.9 12.3 129 17.1 14.1 121
Gunsight Pass 9820 18.4 13.4 137 18.9 15.5 122
Kendall R.S. 7740 9.2 6.3 146 16.9 15.0 113
Loomis Park 8240 14.8 11.6 128 20.3 18.4 110
New Fork Lake 8340 7.0 7.2 97 12.6 11.6 109
Pocket Creek 9360 9.4 -M * 10.1 -M *
Snider Basin 8060 5.3 10.0 53 16.0 15.2 105
Spring Creek Divide 9000 29.0 23.9 121 27.3 25.5 107
Triple Peak 8500 32.9 18.9 174 35.2 27.1 130
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Basin Index (%) 125 111
LOWER GREEN RIVER
Blacks Fork Jct 8869 1.8 -M * 10.5 -M *
Buck Pasture 9632 10.1 -M * 15.4 -M *
EF Blacks Fork GS 9360 6.8 -M * -M -M *
Hams Fork 7840 2.9 4.6 63 11.6 12.6 92
Hewinta 9500 3.6 6.5 55 12.8 15.6 82
Hickerson Park 9122 .8 5.1 16 9.2 11.6 79
Hole-in-Rock 9168 2.1 4.6 46 9.7 11.1 87
Indian Creek 9425 22.8 23.8 96 18.2 24.3 75
Kelley R.S. 8180 10.7 11.8 91 16.3 19.6 83
Spirit Lk 10235 9.2 -M * 13.6 -M *
Steel Creek Park 10158 15.0 16.6 90 16.3 18.5 88
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Basin Index (%) 79 83
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 11.6 -M *
Bug Lake 7987 11.6 16.2 72 18.0 21.1 85
Burts Miller Ranch 8000 .2 -M * 6.7 -M *
Chalk Creek #1 9171 12.3 24.7 50 18.0 27.7 65
Hayden Fork 9130 2.4 10.4 23 18.0 23.1 78
Kelley R.S. 8180 10.7 11.8 91 16.3 19.6 83
Lily Lake 9133 6.3 9.8 64 12.5 19.0 66
Monte Cristo 8932 21.6 27.3 79 24.5 28.4 86
Salt River Summit 7640 6.0 8.4 71 14.5 17.9 81
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Basin Index (%) 65 78
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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.
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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.