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 MONDAY: APRIL 9 , 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 19.0 15.1 126 23.0 20.8 111
Black Bear 8170 41.2 36.9 112 42.9 38.0 113
Blind Bull Sum 8650 36.0 23.4 154 21.4 19.4 110
Cottonwood Creek 7670 23.9 20.9 114 27.6 24.5 113
East Rim Divide 7930 13.0 10.2 127 13.1 11.7 112
Grand Targhee 9260 49.6 39.0 127 30.5 30.8 99
Granite Creek 6770 18.7 14.1 133 23.2 19.6 118
Grassy Lake 7265 33.7 31.4 107 37.3 35.8 104
Gros Ventre Summit 8750 17.4 12.8 136 16.3 12.9 126
Gunsight Pass 9820 18.7 13.9 135 17.8 13.9 128
Lewis Lake Divide 7850 42.7 30.1 142 40.8 35.2 116
Phillips Bench 8200 31.0 25.6 121 30.0 28.0 107
Salt River Summit 7640 11.1 12.6 88 13.8 16.6 83
Snake River Station 6920 19.0 14.6 130 24.9 22.4 111
Spring Creek Divide 9000 28.2 22.6 125 26.1 23.7 110
Thumb Divide 7980 20.7 14.7 141 20.3 18.5 110
Togwotee Pass 9580 34.5 22.3 155 32.8 24.2 136
Two Ocean Plateau 9240 40.0 26.3 152 30.4 27.1 112
Willow Creek 8080 36.8 28.3 130 36.5 33.5 109
Younts Peak 8350 -M 14.5 * -M 15.7 *
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Basin Index (%) 129 111
MADISON-GALLATIN
Black Bear 8170 41.2 36.9 112 42.9 38.0 113
Canyon 7870 17.7 12.4 143 20.3 16.1 126
Madison Plateau 7750 27.6 21.7 127 28.0 26.2 107
West Yellowstone 6700 -M 9.1 * -M 14.1 *
Whiskey Creek 6800 16.4 14.8 111 19.4 20.0 97
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Basin Index (%) 120 110
YELLOWSTONE
Beartooth Lake 9360 40.5 21.5 188 37.2 19.6 190
Burnt Mtn 5880 8.3 4.0 208 15.3 13.1 117
Canyon 7870 17.7 12.4 143 20.3 16.1 126
Cole Creek 7850 15.3 14.9 103 -M 13.1 *
Evening Star 9200 43.6 23.9 182 42.3 27.2 156
Fisher Creek 9100 54.1 31.3 173 48.1 31.4 153
Northeast Entrance 7350 15.2 8.8 173 18.9 12.2 155
Parker Peak 9400 35.9 19.7 182 30.0 17.6 170
Sylvan Lake 8420 27.5 19.5 141 29.3 22.2 132
Thumb Divide 7980 20.7 14.7 141 20.3 18.5 110
Two Ocean Plateau 9240 40.0 26.3 152 30.4 27.1 112
White Mill 8700 43.0 22.5 191 33.3 23.6 141
Wolverine 7650 23.6 9.6 246 22.5 12.2 184
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Basin Index (%) 168 144
WIND RIVER
Burroughs Creek 8750 17.1 -M * 18.5 -M *
Castle Creek 8400 8.7 -M * 10.2 -M *
Cold Springs 9630 10.1 6.5 155 10.2 10.0 102
Deer Park 9700 13.2 16.0 82 15.9 20.0 80
Hobbs Park 10100 18.1 14.3 127 15.6 13.6 115
Kirwin 9550 20.6 9.6 215 18.5 11.6 159
Little Warm 9370 17.5 10.3 170 18.1 12.9 140
Owl Creek 8975 4.6 5.8 79 6.4 6.1 105
South Pass 9040 12.4 15.5 80 -M 17.5 *
St. Lawrence Alt 8620 2.0 6.9 29 8.6 9.0 96
Togwotee Pass 9580 34.5 22.3 155 32.8 24.2 136
Townsend Creek 8700 7.3 9.8 74 9.6 12.2 79
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Basin Index (%) 120 113
BIGHORN BASIN
Bald Mtn. 9380 22.9 19.2 119 16.9 17.0 99
Bear Trap Meadow 8200 -M 4.8 * 11.6 8.7 133
Bone Springs Div 9350 20.9 17.0 123 16.0 15.6 103
Grave Springs 8550 8.3 9.5 87 -M 10.7 *
Kirwin 9550 20.6 9.6 215 18.5 11.6 159
Marquette 8760 6.9 -M * 10.5 -M *
Middle Powder 7760 10.9 12.2 89 -M 11.8 *
Owl Creek 8975 4.6 5.8 79 6.4 6.1 105
Powder River Pass 9480 17.2 10.3 167 16.4 12.7 129
Shell Creek 9580 22.2 15.3 145 17.0 13.8 123
Timber Creek 7950 3.7 5.1 73 -M 7.4 *
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Basin Index (%) 126 120
SHOSHONE RIVER
Blackwater 9780 36.8 22.8 161 -M 20.5 *
Evening Star 9200 43.6 23.9 182 42.3 27.2 156
Marquette 8760 6.9 -M * 10.5 -M *
Sylvan Road 7120 15.8 10.6 149 23.5 16.6 142
Younts Peak 8350 -M 14.5 * -M 15.7 *
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Basin Index (%) 168 150*
POWDER RIVER
Bear Trap Meadow 8200 -M 4.8 * 11.6 8.7 133
Cloud Peak Reservoir 9860 17.0 15.0 113 15.5 13.5 115
Grave Springs 8550 8.3 9.5 87 -M 10.7 *
Hansen Sawmill 8360 9.9 6.1 162 11.4 8.7 131
Middle Powder 7760 10.9 12.2 89 -M 11.8 *
Powder River Pass 9480 17.2 10.3 167 16.4 12.7 129
Soldier Park 8720 8.7 -M * 11.0 -M *
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Basin Index (%) 119 126
TONGUE RIVER
Big Goose 7990 9.5 9.8 97 9.8 11.7 84
Bone Springs Div 9350 20.9 17.0 123 16.0 15.6 103
Burgess Junction 7880 11.3 12.0 94 9.6 12.4 77
Dome Lake 8880 16.4 11.8 139 13.3 13.8 96
Little Goose 8870 11.4 -M * 13.4 -M *
Sucker Creek 8880 12.4 12.4 100 10.1 14.5 70
Tie Creek 6870 6.3 5.5 115 10.5 11.9 88
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Basin Index (%) 112 87
BELLE FOURCHE
Cole Canyon 5910 -M 4.6 * 11.1 9.6 116
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Basin Index (%) * 116
CHEYENNE RIVER BASIN
Blind Park 6890 9.2 6.8 135 12.5 12.0 104
North Rapid Creek 6130 8.1 6.4 127 9.8 10.0 98
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Basin Index (%) 131 101
UPPER N. PLATTE
Arapaho Ridge 10960 22.4 21.1 106 21.8 22.8 96
Blackhall Mtn 9820 29.8 -M * 28.3 -M *
Columbine 9160 25.1 23.3 108 26.6 25.6 104
Divide Peak 8880 15.1 20.1 75 18.8 21.5 87
Joe Wright 10120 21.4 21.5 100 31.2 25.9 120
Laprele Creek 8375 7.0 9.4 74 8.7 12.6 69
Med Bow 10500 43.4 -M * 30.9 -M *
North French Creek 10130 30.5 30.0 102 29.4 26.9 109
Never Summer 10280 21.0 20.4 103 17.1 -M *
Old Battle 10000 26.8 31.6 85 25.0 35.2 71
Rawah 9020 11.8 10.6 111 15.6 14.6 107
Sage Creek Basin 7850 7.5 11.4 66 11.0 14.7 75
Sand Lake 10050 29.0 29.3 99 24.6 25.0 98
South Brush Creek 8440 11.3 11.8 96 12.7 15.3 83
Tower 10500 40.7 46.3 88 26.7 40.0 67
Webber Springs 9250 19.4 23.2 84 22.4 26.8 84
Willow Creek Pass 9540 14.0 12.3 114 15.0 13.5 111
Zirkel 9340 28.2 26.1 108 33.0 28.6 115
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Basin Index (%) 95 92
SWEETWATER
Deer Park 9700 13.2 16.0 82 15.9 20.0 80
Larsen Creek 9000 11.8 11.4 104 12.0 -M *
South Pass 9040 12.4 15.5 80 -M 17.5 *
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Basin Index (%) 87 80*
LOWER N. PLATTE
Casper Mtn. 7900 8.6 14.4 60 7.1 15.2 47
Laprele Creek 8375 7.0 9.4 74 8.7 12.6 69
Reno Hill 8400 10.7 14.1 76 12.1 15.7 77
Windy Peak 7900 7.0 7.6 92 8.9 10.6 84
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Basin Index (%) 73 68
LARAMIE RIVER
Brooklyn Lake 10240 26.7 22.1 121 26.6 21.2 125
Cinnabar Park 9574 22.1 21.4 103 26.0 24.3 107
Crow Creek 8330 4.6 6.8 68 11.7 11.0 106
Deadman Hill 10220 21.5 16.3 132 20.4 17.4 117
Rawah 9020 11.8 10.6 111 15.6 14.6 107
Roach 9700 14.2 16.6 86 17.9 19.3 93
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Basin Index (%) 108 110
S. PLATTE
Black Mountain 8920 10.7 -M * 13.9 -M *
Crow Creek 8330 4.6 6.8 68 11.7 11.0 106
Deadman Hill 10220 21.5 16.3 132 20.4 17.4 117
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Basin Index (%) 113 113
LITTLE SNAKE RIVER
Battle Mountain 7440 5.7 9.0 63 11.2 15.1 74
Divide Peak 8880 15.1 20.1 75 18.8 21.5 87
Elk River 8700 15.8 18.9 84 17.4 20.1 87
Little Snake River 8915 23.0 25.8 89 29.4 30.1 98
Old Battle 10000 26.8 31.6 85 25.0 35.2 71
Sage Creek Basin 7850 7.5 11.4 66 11.0 14.7 75
Sandstone RS 8150 9.4 12.7 74 9.7 18.4 53
Whiskey Park 8950 25.8 27.6 93 26.9 28.1 96
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Basin Index (%) 82 82
UPPER GREEN RIVER
Big Sandy Opening 9080 14.0 12.8 109 13.7 13.3 103
Blind Bull Sum 8650 36.0 23.4 154 21.4 19.4 110
East Rim Divide 7930 13.0 10.2 127 13.1 11.7 112
Elkhart Park G.S. 9400 13.2 12.3 107 12.5 13.3 94
Gros Ventre Summit 8750 17.4 12.8 136 16.3 12.9 126
Gunsight Pass 9820 18.7 13.9 135 17.8 13.9 128
Kendall R.S. 7740 15.6 11.2 139 16.7 14.1 118
Loomis Park 8240 19.2 13.8 139 19.7 17.3 114
New Fork Lake 8340 12.4 10.2 122 12.0 10.8 111
Pocket Creek 9360 9.7 -M * 9.7 -M *
Snider Basin 8060 12.8 12.3 104 15.3 14.1 109
Spring Creek Divide 9000 28.2 22.6 125 26.1 23.7 110
Triple Peak 8500 34.0 21.6 157 33.7 25.2 134
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Basin Index (%) 132 115
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.9 -M * 9.6 -M *
Buck Pasture 9632 11.9 -M * 13.9 -M *
EF Blacks Fork GS 9360 10.4 -M * 6.6 -M *
Hams Fork 7840 9.1 10.3 88 10.1 11.4 89
Hewinta 9500 7.5 10.8 69 11.8 14.1 84
Hickerson Park 9122 6.3 7.9 80 8.1 10.3 79
Hole-in-Rock 9168 7.1 7.1 100 8.6 9.8 88
Indian Creek 9425 23.2 24.8 94 17.0 22.5 76
Kelley R.S. 8180 14.1 14.5 97 15.5 18.1 86
Spirit Lk 10235 10.8 -M * 12.1 -M *
Steel Creek Park 10158 14.4 15.9 91 14.5 16.6 87
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Basin Index (%) 89 83
UPPER BEAR RIVER
Bear River RS 8777 4.8 -M * 10.9 -M *
Bug Lake 7987 14.4 18.7 77 17.0 19.4 88
Burts Miller Ranch 8000 2.2 -M * 6.4 -M *
Chalk Creek #1 9171 15.2 24.5 62 17.0 25.3 67
Hayden Fork 9130 10.8 15.2 71 17.0 21.2 80
Kelley R.S. 8180 14.1 14.5 97 15.5 18.1 86
Lily Lake 9133 9.4 12.8 73 11.8 17.3 68
Monte Cristo 8932 23.2 27.8 83 22.8 26.0 88
Salt River Summit 7640 11.1 12.6 88 13.8 16.6 83
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Basin Index (%) 78 80
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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.