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 TUESDAY: APRIL 24 , 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 16.2 11.0 147 24.9 22.0 113
Black Bear 8170 42.9 36.9 116 45.4 40.5 112
Blind Bull Sum 8650 37.4 24.3 154 22.0 20.6 107
Cottonwood Creek 7670 21.9 17.5 125 30.1 26.3 114
East Rim Divide 7930 8.4 9.2 91 13.5 12.4 109
Grand Targhee 9260 54.8 42.9 128 -M 33.2 *
Granite Creek 6770 14.7 9.8 150 24.1 20.5 118
Grassy Lake 7265 32.2 30.4 106 39.9 38.0 105
Gros Ventre Summit 8750 16.5 12.7 130 17.0 14.0 121
Gunsight Pass 9820 18.5 13.6 136 18.8 15.3 123
Lewis Lake Divide 7850 44.5 30.7 145 44.0 37.4 118
Phillips Bench 8200 32.9 25.3 130 32.2 29.6 109
Salt River Summit 7640 7.2 8.7 83 14.4 17.7 81
Snake River Station 6920 15.0 10.5 143 26.4 23.9 110
Spring Creek Divide 9000 29.2 23.6 124 27.3 25.3 108
Thumb Divide 7980 18.4 14.2 130 21.5 20.1 107
Togwotee Pass 9580 35.8 24.4 147 37.4 26.1 143
Two Ocean Plateau 9240 43.6 28.8 151 34.0 29.0 117
Willow Creek 8080 36.2 26.1 139 40.9 36.1 113
Younts Peak 8350 -M 15.1 * -M 16.9 *
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Basin Index (%) 131 113
MADISON-GALLATIN
Black Bear 8170 42.9 36.9 116 45.4 40.5 112
Canyon 7870 18.1 11.8 153 21.5 17.3 124
Madison Plateau 7750 30.2 22.7 133 30.4 27.9 109
West Yellowstone 6700 9.0 5.6 161 19.4 15.4 126
Whiskey Creek 6800 16.4 15.4 106 22.0 21.6 102
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Basin Index (%) 126 113
YELLOWSTONE
Beartooth Lake 9360 42.1 23.6 178 38.9 21.1 184
Burnt Mtn 5880 6.1 .0 * 17.2 14.8 116
Canyon 7870 18.1 11.8 153 21.5 17.3 124
Cole Creek 7850 17.1 16.3 105 -M 15.1 *
Evening Star 9200 44.8 24.4 184 -M 29.3 *
Fisher Creek 9100 57.0 33.1 172 51.9 34.0 153
Northeast Entrance 7350 13.0 5.4 241 20.2 13.2 153
Parker Peak 9400 39.3 21.6 182 33.3 19.2 173
Sylvan Lake 8420 27.3 20.3 134 31.4 24.1 130
Thumb Divide 7980 18.4 14.2 130 21.5 20.1 107
Two Ocean Plateau 9240 43.6 28.8 151 34.0 29.0 117
White Mill 8700 45.4 23.8 191 35.5 25.3 140
Wolverine 7650 21.3 5.8 367 23.3 13.1 178
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Basin Index (%) 172 142
WIND RIVER
Burroughs Creek 8750 15.8 -M * 19.8 -M *
Castle Creek 8400 5.2 -M * 10.9 -M *
Cold Springs 9630 7.1 3.4 209 10.8 11.5 94
Deer Park 9700 12.0 16.3 74 16.6 22.4 74
Hobbs Park 10100 18.1 15.5 117 16.4 15.5 106
Kirwin 9550 19.1 10.1 189 19.9 12.9 154
Little Warm 9370 16.5 9.7 170 19.1 14.3 134
Owl Creek 8975 1.9 3.0 63 7.4 7.2 103
South Pass 9040 11.1 15.3 73 -M 19.2 *
St. Lawrence Alt 8620 .0 5.1 0 9.0 10.5 86
Togwotee Pass 9580 35.8 24.4 147 37.4 26.1 143
Townsend Creek 8700 5.4 8.9 61 10.1 13.9 73
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Basin Index (%) 114 109
BIGHORN BASIN
Bald Mtn. 9380 24.4 20.2 121 18.6 18.6 100
Bear Trap Meadow 8200 8.6 2.2 391 11.9 9.8 121
Bone Springs Div 9350 22.4 16.4 137 17.4 17.2 101
Grave Springs 8550 8.0 9.3 86 -M 12.1 *
Kirwin 9550 19.1 10.1 189 19.9 12.9 154
Marquette 8760 6.9 -M * 11.6 -M *
Middle Powder 7760 10.8 12.3 88 -M 13.2 *
Owl Creek 8975 1.9 3.0 63 7.4 7.2 103
Powder River Pass 9480 16.5 10.3 160 17.4 14.1 123
Shell Creek 9580 23.2 15.8 147 18.2 15.2 120
Timber Creek 7950 .3 3.9 8 -M 8.8 *
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Basin Index (%) 131 117
SHOSHONE RIVER
Blackwater 9780 37.7 24.3 155 35.4 22.3 159
Evening Star 9200 44.8 24.4 184 -M 29.3 *
Marquette 8760 6.9 -M * 11.6 -M *
Sylvan Road 7120 12.0 8.6 140 25.0 17.9 140
Younts Peak 8350 -M 15.1 * -M 16.9 *
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Basin Index (%) 165 150*
POWDER RIVER
Bear Trap Meadow 8200 8.6 2.2 391 11.9 9.8 121
Cloud Peak Reservoir 9860 17.3 16.2 107 16.6 15.4 108
Grave Springs 8550 8.0 9.3 86 -M 12.1 *
Hansen Sawmill 8360 8.6 4.4 195 12.0 10.0 120
Middle Powder 7760 10.8 12.3 88 -M 13.2 *
Powder River Pass 9480 16.5 10.3 160 17.4 14.1 123
Soldier Park 8720 6.9 -M * 11.5 -M *
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Basin Index (%) 128 117
TONGUE RIVER
Big Goose 7990 9.3 9.1 102 10.8 13.2 82
Bone Springs Div 9350 22.4 16.4 137 17.4 17.2 101
Burgess Junction 7880 11.6 12.5 93 10.6 13.9 76
Dome Lake 8880 16.0 11.8 136 14.6 15.3 95
Little Goose 8870 11.1 -M * 14.8 -M *
Sucker Creek 8880 12.2 12.7 96 11.6 16.2 72
Tie Creek 6870 4.2 3.8 111 11.3 13.4 84
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Basin Index (%) 114 86
BELLE FOURCHE
Cole Canyon 5910 5.6 1.1 509 12.2 10.8 113
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Basin Index (%) 509 113
CHEYENNE RIVER BASIN
Blind Park 6890 5.4 3.8 142 13.5 13.5 100
North Rapid Creek 6130 4.2 3.8 111 10.8 11.5 94
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Basin Index (%) 126 97
UPPER N. PLATTE
Arapaho Ridge 10960 23.8 21.6 110 23.9 25.2 95
Blackhall Mtn 9820 29.2 -M * 30.0 -M *
Columbine 9160 24.0 20.7 116 28.8 27.5 105
Divide Peak 8880 13.0 18.2 71 20.2 23.3 87
Joe Wright 10120 23.5 23.0 102 33.9 28.5 119
Laprele Creek 8375 4.1 7.3 56 9.5 14.2 67
Med Bow 10500 45.2 -M * 37.8 -M *
North French Creek 10130 30.8 32.4 95 31.1 29.3 106
Never Summer 10280 22.6 20.9 108 18.8 -M *
Old Battle 10000 27.9 33.8 83 26.7 37.7 71
Rawah 9020 9.4 8.0 118 17.2 16.4 105
Sage Creek Basin 7850 -M 3.5 * 11.4 15.5 74
Sand Lake 10050 30.1 30.9 97 26.1 27.6 95
South Brush Creek 8440 6.1 9.9 62 13.5 16.9 80
Tower 10500 44.7 49.1 91 -M 43.1 *
Webber Springs 9250 16.9 21.9 77 23.7 28.9 82
Willow Creek Pass 9540 15.0 13.6 110 16.3 14.9 109
Zirkel 9340 23.4 22.5 104 34.5 30.2 114
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Basin Index (%) 94 94
SWEETWATER
Deer Park 9700 12.0 16.3 74 16.6 22.4 74
Larsen Creek 9000 7.7 9.9 78 12.1 -M *
South Pass 9040 11.1 15.3 73 -M 19.2 *
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Basin Index (%) 74 74*
LOWER N. PLATTE
Casper Mtn. 7900 8.0 14.2 56 7.9 17.0 46
Laprele Creek 8375 4.1 7.3 56 9.5 14.2 67
Reno Hill 8400 10.7 13.9 77 13.4 17.8 75
Windy Peak 7900 4.7 6.2 76 9.9 12.2 81
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Basin Index (%) 66 67
LARAMIE RIVER
Brooklyn Lake 10240 26.8 22.7 118 28.2 23.5 120
Cinnabar Park 9574 21.7 19.9 109 27.1 26.0 104
Crow Creek 8330 .6 .0 * 12.4 12.6 98
Deadman Hill 10220 22.7 17.9 127 22.0 19.6 112
Rawah 9020 9.4 8.0 118 17.2 16.4 105
Roach 9700 13.8 16.7 83 19.1 21.3 90
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Basin Index (%) 112 106
S. PLATTE
Black Mountain 8920 9.3 -M * 14.8 -M *
Crow Creek 8330 .6 .0 * 12.4 12.6 98
Deadman Hill 10220 22.7 17.9 127 22.0 19.6 112
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Basin Index (%) 130* 107
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 2.4 0 12.5 16.4 76
Divide Peak 8880 13.0 18.2 71 20.2 23.3 87
Elk River 8700 11.4 14.7 78 18.6 21.8 85
Little Snake River 8915 19.8 23.5 84 30.7 31.5 97
Old Battle 10000 27.9 33.8 83 26.7 37.7 71
Sage Creek Basin 7850 -M 3.5 * 11.4 15.5 74
Sandstone RS 8150 4.3 9.2 47 11.0 20.0 55
Whiskey Park 8950 24.3 25.6 95 28.6 30.3 94
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Basin Index (%) 79 81
UPPER GREEN RIVER
Big Sandy Opening 9080 12.3 12.2 101 14.0 14.5 97
Blind Bull Sum 8650 37.4 24.3 154 22.0 20.6 107
East Rim Divide 7930 8.4 9.2 91 13.5 12.4 109
Elkhart Park G.S. 9400 12.5 11.8 106 13.1 14.3 92
Gros Ventre Summit 8750 16.5 12.7 130 17.0 14.0 121
Gunsight Pass 9820 18.5 13.6 136 18.8 15.3 123
Kendall R.S. 7740 10.4 7.0 149 16.9 14.9 113
Loomis Park 8240 15.5 12.1 128 20.3 18.2 112
New Fork Lake 8340 7.9 7.7 103 12.5 11.5 109
Pocket Creek 9360 9.4 -M * 10.0 -M *
Snider Basin 8060 6.8 10.2 67 15.9 15.1 105
Spring Creek Divide 9000 29.2 23.6 124 27.3 25.3 108
Triple Peak 8500 34.0 19.1 178 35.2 26.8 131
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Basin Index (%) 128 112
LOWER GREEN RIVER
Blacks Fork Jct 8869 3.8 -M * 10.5 -M *
Buck Pasture 9632 11.2 -M * 15.5 -M *
EF Blacks Fork GS 9360 8.1 -M * -M -M *
Hams Fork 7840 4.3 5.3 81 11.5 12.4 93
Hewinta 9500 4.9 7.2 68 12.8 15.4 83
Hickerson Park 9122 1.4 5.1 27 9.1 11.5 79
Hole-in-Rock 9168 3.8 5.3 72 9.6 10.9 88
Indian Creek 9425 23.5 23.6 100 18.1 24.1 75
Kelley R.S. 8180 11.7 11.9 98 16.2 19.3 84
Spirit Lk 10235 10.1 -M * 13.6 -M *
Steel Creek Park 10158 15.7 16.5 95 16.2 18.2 89
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Basin Index (%) 87 84
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 11.6 -M *
Bug Lake 7987 12.6 16.2 78 18.0 20.8 87
Burts Miller Ranch 8000 .3 -M * 6.6 -M *
Chalk Creek #1 9171 13.5 24.6 55 18.0 27.3 66
Hayden Fork 9130 5.0 10.9 46 18.0 22.8 79
Kelley R.S. 8180 11.7 11.9 98 16.2 19.3 84
Lily Lake 9133 7.7 10.0 77 12.5 18.7 67
Monte Cristo 8932 22.9 27.3 84 24.5 28.0 88
Salt River Summit 7640 7.2 8.7 83 14.4 17.7 81
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Basin Index (%) 74 79
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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.