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 SUNDAY: APRIL 15 , 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 19.7 13.2 149 24.4 21.3 115
Black Bear 8170 44.0 36.6 120 44.3 39.0 114
Blind Bull Sum 8650 37.0 23.8 155 21.8 19.8 110
Cottonwood Creek 7670 24.8 19.8 125 29.1 25.2 115
East Rim Divide 7930 12.6 10.0 126 13.3 11.9 112
Grand Targhee 9260 53.6 41.0 131 32.1 32.0 100
Granite Creek 6770 18.2 12.3 148 23.8 19.9 120
Grassy Lake 7265 34.6 31.5 110 39.0 36.6 107
Gros Ventre Summit 8750 17.5 13.0 135 16.6 13.3 125
Gunsight Pass 9820 19.3 13.4 144 18.2 14.3 127
Lewis Lake Divide 7850 45.1 30.2 149 43.4 36.1 120
Phillips Bench 8200 33.1 26.0 127 31.9 28.6 112
Salt River Summit 7640 10.6 11.2 95 14.2 17.0 84
Snake River Station 6920 19.0 12.8 148 26.2 22.9 114
Spring Creek Divide 9000 28.6 23.2 123 26.8 24.3 110
Thumb Divide 7980 21.6 14.4 150 21.2 19.0 112
Togwotee Pass 9580 35.9 23.0 156 33.0 24.9 133
Two Ocean Plateau 9240 42.0 27.2 154 31.0 27.9 111
Willow Creek 8080 38.1 26.7 143 39.9 34.4 116
Younts Peak 8350 -M 14.7 * -M 16.2 *
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Basin Index (%) 136 113
MADISON-GALLATIN
Black Bear 8170 44.0 36.6 120 44.3 39.0 114
Canyon 7870 18.6 12.4 150 21.1 16.6 127
Madison Plateau 7750 29.5 22.5 131 29.5 26.8 110
West Yellowstone 6700 12.4 8.2 151 18.3 14.4 127
Whiskey Creek 6800 16.9 14.8 114 21.5 20.6 104
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Basin Index (%) 128 115
YELLOWSTONE
Beartooth Lake 9360 42.0 22.4 188 38.6 20.3 190
Burnt Mtn 5880 7.9 .2 3950* 16.0 13.5 119
Canyon 7870 18.6 12.4 150 21.1 16.6 127
Cole Creek 7850 16.5 15.6 106 -M 14.0 *
Evening Star 9200 45.3 24.7 183 42.4 28.1 151
Fisher Creek 9100 56.9 31.9 178 50.6 32.6 155
Northeast Entrance 7350 16.0 8.0 200 19.9 12.6 158
Parker Peak 9400 37.4 20.5 182 30.4 18.2 167
Sylvan Lake 8420 28.7 20.0 144 30.4 22.9 133
Thumb Divide 7980 21.6 14.4 150 21.2 19.0 112
Two Ocean Plateau 9240 42.0 27.2 154 31.0 27.9 111
White Mill 8700 45.4 23.5 193 35.0 24.4 143
Wolverine 7650 24.2 8.6 281 23.0 12.6 183
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Basin Index (%) 175 145
WIND RIVER
Burroughs Creek 8750 18.2 -M * 19.7 -M *
Castle Creek 8400 8.9 -M * 10.7 -M *
Cold Springs 9630 10.5 5.8 181 10.8 10.4 104
Deer Park 9700 13.0 16.0 81 16.2 20.7 78
Hobbs Park 10100 18.5 14.9 124 15.8 14.2 111
Kirwin 9550 21.5 9.9 217 19.5 12.0 162
Little Warm 9370 18.1 10.2 177 18.8 13.4 140
Owl Creek 8975 4.8 5.1 94 6.8 6.4 106
South Pass 9040 12.4 15.8 78 -M 18.0 *
St. Lawrence Alt 8620 -M 6.4 * 8.7 9.4 93
Togwotee Pass 9580 35.9 23.0 156 33.0 24.9 133
Townsend Creek 8700 7.3 10.0 73 9.6 12.8 75
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Basin Index (%) 128 112
BIGHORN BASIN
Bald Mtn. 9380 23.9 19.4 123 17.7 17.7 100
Bear Trap Meadow 8200 -M 4.4 * 11.7 9.1 129
Bone Springs Div 9350 21.9 16.8 130 16.8 16.2 104
Grave Springs 8550 8.4 9.6 88 -M 11.2 *
Kirwin 9550 21.5 9.9 217 19.5 12.0 162
Marquette 8760 7.1 -M * 10.8 -M *
Middle Powder 7760 10.3 12.4 83 -M 12.3 *
Owl Creek 8975 4.8 5.1 94 6.8 6.4 106
Powder River Pass 9480 17.3 10.2 170 16.8 13.2 127
Shell Creek 9580 23.3 15.5 150 17.7 14.3 124
Timber Creek 7950 2.8 5.2 54 -M 7.9 *
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Basin Index (%) 129 120
SHOSHONE RIVER
Blackwater 9780 37.5 23.7 158 35.0 21.3 164
Evening Star 9200 45.3 24.7 183 42.4 28.1 151
Marquette 8760 7.1 -M * 10.8 -M *
Sylvan Road 7120 16.0 10.3 155 24.4 17.1 143
Younts Peak 8350 -M 14.7 * -M 16.2 *
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Basin Index (%) 168 153
POWDER RIVER
Bear Trap Meadow 8200 -M 4.4 * 11.7 9.1 129
Cloud Peak Reservoir 9860 17.7 15.4 115 16.0 14.2 113
Grave Springs 8550 8.4 9.6 88 -M 11.2 *
Hansen Sawmill 8360 9.9 5.9 168 11.7 9.1 129
Middle Powder 7760 10.3 12.4 83 -M 12.3 *
Powder River Pass 9480 17.3 10.2 170 16.8 13.2 127
Soldier Park 8720 8.8 -M * 11.3 -M *
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Basin Index (%) 119 123
TONGUE RIVER
Big Goose 7990 9.5 9.7 98 10.2 12.1 84
Bone Springs Div 9350 21.9 16.8 130 16.8 16.2 104
Burgess Junction 7880 11.6 12.1 96 10.3 13.0 79
Dome Lake 8880 16.9 12.0 141 14.0 14.3 98
Little Goose 8870 11.6 -M * 13.9 -M *
Sucker Creek 8880 12.9 12.6 102 10.8 15.1 72
Tie Creek 6870 6.2 4.8 129 10.8 12.3 88
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Basin Index (%) 116 88
BELLE FOURCHE
Cole Canyon 5910 -M 3.2 * 12.0 10.0 120
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Basin Index (%) * 120
CHEYENNE RIVER BASIN
Blind Park 6890 8.7 5.1 171 13.1 12.4 106
North Rapid Creek 6130 7.6 5.5 138 10.3 10.4 99
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Basin Index (%) 154 103
UPPER N. PLATTE
Arapaho Ridge 10960 22.6 21.6 105 22.5 23.7 95
Blackhall Mtn 9820 -M -M * -M -M *
Columbine 9160 25.1 21.8 115 27.7 26.4 105
Divide Peak 8880 15.2 20.0 76 19.4 22.2 87
Joe Wright 10120 22.9 22.1 104 32.8 26.9 122
Laprele Creek 8375 7.3 9.0 81 9.3 13.2 70
Med Bow 10500 39.0 -M * -M -M *
North French Creek 10130 31.4 31.8 99 30.5 27.8 110
Never Summer 10280 21.8 20.5 106 18.0 -M *
Old Battle 10000 27.6 32.2 86 25.8 36.1 71
Rawah 9020 11.3 9.6 118 16.5 15.0 110
Sage Creek Basin 7850 5.2 8.8 59 11.2 15.0 75
Sand Lake 10050 29.8 30.4 98 25.5 25.9 98
South Brush Creek 8440 10.2 10.9 94 13.2 15.9 83
Tower 10500 42.6 47.4 90 -M 41.1 *
Webber Springs 9250 19.1 23.3 82 23.0 27.7 83
Willow Creek Pass 9540 14.4 12.7 113 15.6 14.0 111
Zirkel 9340 27.0 23.9 113 33.8 29.2 116
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Basin Index (%) 96 96
SWEETWATER
Deer Park 9700 13.0 16.0 81 16.2 20.7 78
Larsen Creek 9000 11.2 10.8 104 11.9 -M *
South Pass 9040 12.4 15.8 78 -M 18.0 *
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Basin Index (%) 86 78*
LOWER N. PLATTE
Casper Mtn. 7900 8.7 14.4 60 7.6 16.0 48
Laprele Creek 8375 7.3 9.0 81 9.3 13.2 70
Reno Hill 8400 11.0 14.1 78 12.9 16.5 78
Windy Peak 7900 7.0 7.4 95 9.4 11.2 84
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Basin Index (%) 76 69
LARAMIE RIVER
Brooklyn Lake 10240 27.1 22.2 122 27.3 22.1 124
Cinnabar Park 9574 22.5 21.0 107 26.4 24.9 106
Crow Creek 8330 4.0 4.1 98 12.1 11.5 105
Deadman Hill 10220 22.2 16.5 135 21.3 18.2 117
Rawah 9020 11.3 9.6 118 16.5 15.0 110
Roach 9700 14.2 16.5 86 18.3 20.0 92
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Basin Index (%) 113 109
S. PLATTE
Black Mountain 8920 10.7 -M * 14.4 -M *
Crow Creek 8330 4.0 4.1 98 12.1 11.5 105
Deadman Hill 10220 22.2 16.5 135 21.3 18.2 117
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Basin Index (%) 127 112
LITTLE SNAKE RIVER
Battle Mountain 7440 4.0 6.7 60 11.9 15.6 76
Divide Peak 8880 15.2 20.0 76 19.4 22.2 87
Elk River 8700 14.9 17.2 87 18.1 20.7 87
Little Snake River 8915 22.8 25.8 88 30.2 30.7 98
Old Battle 10000 27.6 32.2 86 25.8 36.1 71
Sage Creek Basin 7850 5.2 8.8 59 11.2 15.0 75
Sandstone RS 8150 8.6 11.8 73 10.6 19.0 56
Whiskey Park 8950 26.2 27.0 97 27.9 28.8 97
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Basin Index (%) 83 82
UPPER GREEN RIVER
Big Sandy Opening 9080 13.9 12.9 108 13.9 13.7 101
Blind Bull Sum 8650 37.0 23.8 155 21.8 19.8 110
East Rim Divide 7930 12.6 10.0 126 13.3 11.9 112
Elkhart Park G.S. 9400 13.4 12.0 112 12.8 13.7 93
Gros Ventre Summit 8750 17.5 13.0 135 16.6 13.3 125
Gunsight Pass 9820 19.3 13.4 144 18.2 14.3 127
Kendall R.S. 7740 14.4 9.8 147 16.9 14.4 117
Loomis Park 8240 19.1 13.6 140 20.0 17.6 114
New Fork Lake 8340 11.7 9.6 122 12.3 11.0 112
Pocket Creek 9360 9.8 -M * 9.9 -M *
Snider Basin 8060 11.6 11.6 100 15.8 14.5 109
Spring Creek Divide 9000 28.6 23.2 123 26.8 24.3 110
Triple Peak 8500 35.2 19.7 179 34.7 25.7 135
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Basin Index (%) 136 115
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.4 -M * 9.9 -M *
Buck Pasture 9632 12.3 -M * 14.8 -M *
EF Blacks Fork GS 9360 10.4 -M * 7.2 -M *
Hams Fork 7840 8.7 8.6 101 10.4 11.7 89
Hewinta 9500 7.4 9.7 76 12.2 14.5 84
Hickerson Park 9122 4.7 6.6 71 8.3 10.7 78
Hole-in-Rock 9168 6.2 6.8 91 8.9 10.2 87
Indian Creek 9425 24.7 23.9 103 17.7 23.1 77
Kelley R.S. 8180 14.4 13.7 105 16.0 18.5 86
Spirit Lk 10235 10.6 -M * 12.5 -M *
Steel Creek Park 10158 15.2 16.1 94 15.4 17.2 90
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Basin Index (%) 95 84
UPPER BEAR RIVER
Bear River RS 8777 3.8 -M * 11.3 -M *
Bug Lake 7987 14.7 19.0 77 17.8 19.9 89
Burts Miller Ranch 8000 .1 -M * 6.5 -M *
Chalk Creek #1 9171 15.3 24.9 61 17.7 26.1 68
Hayden Fork 9130 10.3 13.9 74 17.7 21.8 81
Kelley R.S. 8180 14.4 13.7 105 16.0 18.5 86
Lily Lake 9133 9.3 12.4 75 12.2 17.8 69
Monte Cristo 8932 24.2 27.8 87 23.9 26.8 89
Salt River Summit 7640 10.6 11.2 95 14.2 17.0 84
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Basin Index (%) 80 81
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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.