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 FRIDAY: APRIL 13 , 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 14.0 141 24.3 21.2 115
Black Bear 8170 43.4 36.6 119 44.1 38.7 114
Blind Bull Sum 8650 36.7 23.7 155 21.7 19.7 110
Cottonwood Creek 7670 24.5 20.3 121 28.7 25.0 115
East Rim Divide 7930 12.5 10.1 124 13.2 11.9 111
Grand Targhee 9260 -M 40.4 * 31.6 31.4 101
Granite Creek 6770 18.3 13.0 141 23.7 19.8 120
Grassy Lake 7265 34.5 31.4 110 38.8 36.4 107
Gros Ventre Summit 8750 17.5 12.9 136 16.6 13.2 126
Gunsight Pass 9820 19.0 13.6 140 18.1 14.1 128
Lewis Lake Divide 7850 44.5 30.2 147 -M 35.8 *
Phillips Bench 8200 32.9 26.0 127 31.7 28.4 112
Salt River Summit 7640 10.5 11.8 89 14.0 16.9 83
Snake River Station 6920 18.8 13.6 138 26.0 22.7 115
Spring Creek Divide 9000 28.5 23.0 124 26.6 24.1 110
Thumb Divide 7980 21.5 14.6 147 21.1 18.9 112
Togwotee Pass 9580 35.7 22.8 157 32.9 24.7 133
Two Ocean Plateau 9240 41.6 26.9 155 31.0 27.6 112
Willow Creek 8080 37.8 27.2 139 39.4 34.2 115
Younts Peak 8350 -M 14.6 * -M 16.0 *
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Basin Index (%) 134 113
MADISON-GALLATIN
Black Bear 8170 43.4 36.6 119 44.1 38.7 114
Canyon 7870 18.5 12.3 150 21.1 16.5 128
Madison Plateau 7750 29.0 22.3 130 29.2 26.6 110
West Yellowstone 6700 12.2 8.5 144 18.2 14.3 127
Whiskey Creek 6800 16.8 14.6 115 21.4 20.5 104
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Basin Index (%) 127 115
YELLOWSTONE
Beartooth Lake 9360 41.9 22.0 190 38.5 20.1 192
Burnt Mtn 5880 8.0 1.7 471 15.9 13.3 120
Canyon 7870 18.5 12.3 150 21.1 16.5 128
Cole Creek 7850 16.1 15.4 105 -M 13.7 *
Evening Star 9200 44.8 24.4 184 -M 27.8 *
Fisher Creek 9100 56.7 31.7 179 50.5 32.2 157
Northeast Entrance 7350 16.0 8.4 190 19.8 12.5 158
Parker Peak 9400 37.1 20.2 184 30.4 18.0 169
Sylvan Lake 8420 28.6 19.8 144 30.2 22.7 133
Thumb Divide 7980 21.5 14.6 147 21.1 18.9 112
Two Ocean Plateau 9240 41.6 26.9 155 31.0 27.6 112
White Mill 8700 45.1 23.3 194 34.8 24.1 144
Wolverine 7650 24.1 9.1 265 22.9 12.4 185
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Basin Index (%) 174 145
WIND RIVER
Burroughs Creek 8750 18.0 -M * 19.3 -M *
Castle Creek 8400 8.9 -M * 10.5 -M *
Cold Springs 9630 10.5 6.0 175 10.3 10.3 100
Deer Park 9700 12.8 16.2 79 16.1 20.5 79
Hobbs Park 10100 18.5 14.9 124 15.6 14.1 111
Kirwin 9550 21.3 9.9 215 19.3 11.9 162
Little Warm 9370 17.9 10.3 174 18.5 13.2 140
Owl Creek 8975 4.6 5.4 85 6.7 6.3 106
South Pass 9040 12.2 15.8 77 -M 17.9 *
St. Lawrence Alt 8620 -M 6.7 * 8.6 9.3 92
Togwotee Pass 9580 35.7 22.8 157 32.9 24.7 133
Townsend Creek 8700 7.3 10.0 73 9.4 12.7 74
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Basin Index (%) 127 112
BIGHORN BASIN
Bald Mtn. 9380 23.5 19.3 122 17.4 17.5 99
Bear Trap Meadow 8200 -M 4.6 * 11.7 8.9 131
Bone Springs Div 9350 21.8 17.0 128 16.8 16.0 105
Grave Springs 8550 8.2 9.6 85 -M 11.0 *
Kirwin 9550 21.3 9.9 215 19.3 11.9 162
Marquette 8760 7.0 -M * 10.7 -M *
Middle Powder 7760 10.4 12.4 84 -M 12.2 *
Owl Creek 8975 4.6 5.4 85 6.7 6.3 106
Powder River Pass 9480 17.3 10.3 168 16.8 13.0 129
Shell Creek 9580 23.1 15.6 148 17.6 14.2 124
Timber Creek 7950 3.0 5.2 58 -M 7.7 *
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Basin Index (%) 127 121
SHOSHONE RIVER
Blackwater 9780 37.4 23.5 159 -M 21.0 *
Evening Star 9200 44.8 24.4 184 -M 27.8 *
Marquette 8760 7.0 -M * 10.7 -M *
Sylvan Road 7120 16.0 10.4 154 24.4 16.9 144
Younts Peak 8350 -M 14.6 * -M 16.0 *
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Basin Index (%) 168 144*
POWDER RIVER
Bear Trap Meadow 8200 -M 4.6 * 11.7 8.9 131
Cloud Peak Reservoir 9860 17.5 15.3 114 15.9 14.0 114
Grave Springs 8550 8.2 9.6 85 -M 11.0 *
Hansen Sawmill 8360 9.8 6.1 161 11.7 9.0 130
Middle Powder 7760 10.4 12.4 84 -M 12.2 *
Powder River Pass 9480 17.3 10.3 168 16.8 13.0 129
Soldier Park 8720 8.8 -M * 11.3 -M *
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Basin Index (%) 118 125
TONGUE RIVER
Big Goose 7990 9.4 9.9 95 10.0 12.0 83
Bone Springs Div 9350 21.8 17.0 128 16.8 16.0 105
Burgess Junction 7880 11.5 12.2 94 9.7 12.9 75
Dome Lake 8880 16.8 12.0 140 13.8 14.2 97
Little Goose 8870 11.4 -M * 13.7 -M *
Sucker Creek 8880 12.6 12.6 100 10.4 15.0 69
Tie Creek 6870 5.9 5.1 116 10.6 12.1 88
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Basin Index (%) 113 87
BELLE FOURCHE
Cole Canyon 5910 7.8 3.8 205 11.6 9.9 117
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Basin Index (%) 205 117
CHEYENNE RIVER BASIN
Blind Park 6890 8.5 5.8 147 12.8 12.4 103
North Rapid Creek 6130 7.1 5.9 120 10.1 10.3 98
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Basin Index (%) 133 101
UPPER N. PLATTE
Arapaho Ridge 10960 22.5 21.5 105 22.1 23.6 94
Blackhall Mtn 9820 29.8 -M * 28.8 -M *
Columbine 9160 25.2 22.6 112 27.3 26.2 104
Divide Peak 8880 15.0 20.3 74 19.1 22.0 87
Joe Wright 10120 22.3 22.0 101 32.1 26.7 120
Laprele Creek 8375 6.6 9.3 71 8.8 13.0 68
Med Bow 10500 43.9 -M * -M -M *
North French Creek 10130 31.1 31.2 100 30.2 27.5 110
Never Summer 10280 21.5 20.5 105 17.8 -M *
Old Battle 10000 27.4 32.1 85 25.7 35.8 72
Rawah 9020 11.4 10.0 114 16.1 15.0 107
Sage Creek Basin 7850 5.5 9.9 56 11.1 15.0 74
Sand Lake 10050 29.5 30.1 98 25.2 25.6 98
South Brush Creek 8440 10.2 11.3 90 13.1 15.8 83
Tower 10500 42.2 47.2 89 -M 40.8 *
Webber Springs 9250 19.0 23.4 81 22.8 27.4 83
Willow Creek Pass 9540 14.5 12.6 115 15.4 13.9 111
Zirkel 9340 27.1 24.7 110 33.4 29.1 115
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Basin Index (%) 95 96
SWEETWATER
Deer Park 9700 12.8 16.2 79 16.1 20.5 79
Larsen Creek 9000 11.2 11.0 102 11.8 -M *
South Pass 9040 12.2 15.8 77 -M 17.9 *
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Basin Index (%) 84 79*
LOWER N. PLATTE
Casper Mtn. 7900 8.6 14.5 59 7.3 15.7 46
Laprele Creek 8375 6.6 9.3 71 8.8 13.0 68
Reno Hill 8400 10.4 14.2 73 12.3 16.2 76
Windy Peak 7900 6.6 7.5 88 9.2 11.0 84
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Basin Index (%) 71 67
LARAMIE RIVER
Brooklyn Lake 10240 27.0 22.3 121 27.0 21.8 124
Cinnabar Park 9574 22.5 21.3 106 26.2 24.8 106
Crow Creek 8330 3.5 5.5 64 11.8 11.4 104
Deadman Hill 10220 21.7 16.6 131 20.8 18.0 116
Rawah 9020 11.4 10.0 114 16.1 15.0 107
Roach 9700 14.2 16.5 86 18.1 19.9 91
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Basin Index (%) 109 108
S. PLATTE
Black Mountain 8920 10.4 -M * 14.1 -M *
Crow Creek 8330 3.5 5.5 64 11.8 11.4 104
Deadman Hill 10220 21.7 16.6 131 20.8 18.0 116
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Basin Index (%) 114 111
LITTLE SNAKE RIVER
Battle Mountain 7440 4.3 7.7 56 -M 15.4 *
Divide Peak 8880 15.0 20.3 74 19.1 22.0 87
Elk River 8700 15.2 17.8 85 18.0 20.6 87
Little Snake River 8915 22.5 26.0 87 29.9 30.7 97
Old Battle 10000 27.4 32.1 85 25.7 35.8 72
Sage Creek Basin 7850 5.5 9.9 56 11.1 15.0 74
Sandstone RS 8150 8.8 12.4 71 10.1 18.8 54
Whiskey Park 8950 26.0 27.5 95 27.6 28.5 97
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Basin Index (%) 81 83
UPPER GREEN RIVER
Big Sandy Opening 9080 13.8 12.9 107 13.8 13.6 101
Blind Bull Sum 8650 36.7 23.7 155 21.7 19.7 110
East Rim Divide 7930 12.5 10.1 124 13.2 11.9 111
Elkhart Park G.S. 9400 13.3 12.2 109 12.7 13.6 93
Gros Ventre Summit 8750 17.5 12.9 136 16.6 13.2 126
Gunsight Pass 9820 19.0 13.6 140 18.1 14.1 128
Kendall R.S. 7740 14.8 10.4 142 16.7 14.3 117
Loomis Park 8240 19.0 13.7 139 20.0 17.5 114
New Fork Lake 8340 11.9 9.8 121 12.3 10.9 113
Pocket Creek 9360 9.8 -M * 9.8 -M *
Snider Basin 8060 11.6 12.0 97 15.5 14.4 108
Spring Creek Divide 9000 28.5 23.0 124 26.6 24.1 110
Triple Peak 8500 34.9 20.3 172 34.4 25.6 134
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Basin Index (%) 134 115
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.0 -M * 9.9 -M *
Buck Pasture 9632 11.8 -M * 14.4 -M *
EF Blacks Fork GS 9360 9.8 -M * 7.0 -M *
Hams Fork 7840 8.7 9.2 95 10.3 11.6 89
Hewinta 9500 6.7 10.3 65 11.9 14.5 82
Hickerson Park 9122 4.7 7.2 65 8.0 10.6 75
Hole-in-Rock 9168 6.1 7.1 86 8.6 10.1 85
Indian Creek 9425 24.3 24.3 100 17.4 22.9 76
Kelley R.S. 8180 14.2 14.0 101 15.9 18.3 87
Spirit Lk 10235 10.1 -M * 12.2 -M *
Steel Creek Park 10158 14.9 16.1 93 15.1 17.1 88
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Basin Index (%) 90 83
UPPER BEAR RIVER
Bear River RS 8777 3.4 -M * 11.2 -M *
Bug Lake 7987 14.5 19.2 76 17.6 19.8 89
Burts Miller Ranch 8000 .5 -M * 6.4 -M *
Chalk Creek #1 9171 15.1 24.8 61 17.6 25.9 68
Hayden Fork 9130 9.8 14.4 68 17.4 21.6 81
Kelley R.S. 8180 14.2 14.0 101 15.9 18.3 87
Lily Lake 9133 9.0 12.7 71 12.0 17.7 68
Monte Cristo 8932 24.0 27.8 86 23.6 26.5 89
Salt River Summit 7640 10.5 11.8 89 14.0 16.9 83
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Basin Index (%) 78 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.