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: NOVEMBER 25 , 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 3.1 3.0 103 5.1 5.1 100
Black Bear 8170 5.7 7.8 73 8.4 9.3 90
Blind Bull Sum 8650 4.1 4.3 95 4.6 4.9 94
Cottonwood Creek 7670 4.2 3.4 124 6.4 5.9 108
East Rim Divide 7930 1.9 1.6 119 3.2 2.9 110
Grand Targhee 9260 11.8 9.3 127 10.3 9.4 110
Granite Creek 6770 2.8 2.0 140 5.2 4.5 116
Grassy Lake 7265 4.5 5.5 82 7.8 8.5 92
Gros Ventre Summit 8750 2.2 3.3 67 2.9 3.7 78
Gunsight Pass 9820 2.5 2.8 89 4.8 3.7 130
Lewis Lake Divide 7850 4.6 6.1 75 8.2 8.6 95
Phillips Bench 8200 4.1 4.4 93 7.4 6.3 117
Salt River Summit 7640 2.0 1.6 125 4.2 3.8 111
Snake River Station 6920 2.9 2.5 116 7.1 5.6 127
Spring Creek Divide 9000 4.4 4.4 100 6.2 5.5 113
Thumb Divide 7980 1.8 2.7 67 4.4 4.8 92
Togwotee Pass 9580 6.6 6.0 110 7.5 6.2 121
Two Ocean Plateau 9240 7.5 7.8 96 6.2 7.0 89
Willow Creek 8080 4.8 4.6 104 9.0 8.3 108
Younts Peak 8350 -M 3.7 * -M 4.5 *
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Basin Index (%) 98 104
MADISON-GALLATIN
Black Bear 8170 5.7 7.8 73 8.4 9.3 90
Canyon 7870 2.0 2.5 80 3.8 4.3 88
Madison Plateau 7750 3.1 4.4 70 5.2 6.3 83
West Yellowstone 6700 1.7 1.6 106 3.2 3.7 86
Whiskey Creek 6800 1.3 2.6 50 2.3 5.1 45
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Basin Index (%) 73 80
YELLOWSTONE
Beartooth Lake 9360 5.2 5.5 95 4.4 4.9 90
Burnt Mtn 5880 2.3 1.0 230 5.3 4.9 108
Canyon 7870 2.0 2.5 80 3.8 4.3 88
Cole Creek 7850 6.2 3.5 177 6.7 4.6 146
Evening Star 9200 7.4 6.4 116 10.0 7.3 137
Fisher Creek 9100 6.5 7.8 83 10.0 8.0 125
Northeast Entrance 7350 2.5 1.4 179 5.2 3.6 144
Parker Peak 9400 7.0 5.4 130 8.0 5.0 160
Sylvan Lake 8420 5.8 4.5 129 10.0 6.4 156
Thumb Divide 7980 1.8 2.7 67 4.4 4.8 92
Two Ocean Plateau 9240 7.5 7.8 96 6.2 7.0 89
White Mill 8700 5.1 5.3 96 5.1 6.3 81
Wolverine 7650 2.3 1.5 153 4.5 3.6 125
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Basin Index (%) 111 118
WIND RIVER
Burroughs Creek 8750 2.1 -M * 3.2 -M *
Castle Creek 8400 .8 -M * 2.0 -M *
Cold Springs 9630 1.9 2.0 95 2.1 3.3 64
Deer Park 9700 3.9 3.6 108 4.3 5.1 84
Hobbs Park 10100 3.5 4.1 85 2.9 4.0 72
Kirwin 9550 2.2 3.1 71 2.4 3.6 67
Little Warm 9370 1.7 2.5 68 2.8 3.7 76
Owl Creek 8975 2.2 1.5 147 2.7 2.1 129
South Pass 9040 3.0 3.4 88 3.7 4.7 79
St. Lawrence Alt 8620 1.2 1.8 67 3.2 2.9 110
Togwotee Pass 9580 6.6 6.0 110 7.5 6.2 121
Townsend Creek 8700 2.8 2.2 127 3.9 3.8 103
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Basin Index (%) 96 90
BIGHORN BASIN
Bald Mtn. 9380 6.9 5.2 133 4.3 4.7 91
Bear Trap Meadow 8200 2.9 1.3 223 3.1 2.9 107
Bone Springs Div 9350 5.2 4.7 111 4.4 4.4 100
Grave Springs 8550 2.5 1.6 156 3.3 3.3 100
Kirwin 9550 2.2 3.1 71 2.4 3.6 67
Marquette 8760 -M -M * 3.8 -M *
Middle Powder 7760 3.2 2.4 133 2.8 4.0 70
Owl Creek 8975 2.2 1.5 147 2.7 2.1 129
Powder River Pass 9480 3.5 2.5 140 3.1 3.7 84
Shell Creek 9580 5.8 4.6 126 5.3 4.2 126
Timber Creek 7950 1.3 1.5 87 2.8 3.0 93
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Basin Index (%) 126 95
SHOSHONE RIVER
Blackwater 9780 8.2 6.3 130 8.4 5.8 145
Evening Star 9200 7.4 6.4 116 10.0 7.3 137
Marquette 8760 -M -M * 3.8 -M *
Sylvan Road 7120 3.1 2.1 148 5.6 5.1 110
Younts Peak 8350 -M 3.7 * -M 4.5 *
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Basin Index (%) 126 132
POWDER RIVER
Bear Trap Meadow 8200 2.9 1.3 223 3.1 2.9 107
Cloud Peak Reservoir 9860 5.1 3.6 142 4.8 4.3 112
Grave Springs 8550 2.5 1.6 156 3.3 3.3 100
Hansen Sawmill 8360 1.6 1.4 114 3.3 2.9 114
Middle Powder 7760 3.2 2.4 133 2.8 4.0 70
Powder River Pass 9480 3.5 2.5 140 3.1 3.7 84
Soldier Park 8720 1.4 -M * 3.2 -M *
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Basin Index (%) 147 97
TONGUE RIVER
Big Goose 7990 2.4 2.1 114 4.4 3.8 116
Bone Springs Div 9350 5.2 4.7 111 4.4 4.4 100
Burgess Junction 7880 2.8 2.7 104 3.6 3.8 95
Dome Lake 8880 2.7 3.3 82 3.5 4.4 80
Little Goose 8870 3.7 -M * 3.5 -M *
Sucker Creek 8880 4.5 3.0 150 4.1 4.3 95
Tie Creek 6870 1.4 .6 233 4.9 3.9 126
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Basin Index (%) 116 101
BELLE FOURCHE
Cole Canyon 5910 .9 .7 129 3.3 3.2 103
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Basin Index (%) 129 103
CHEYENNE RIVER BASIN
Blind Park 6890 1.6 1.5 107 2.3 4.0 58
North Rapid Creek 6130 1.0 1.2 83 2.0 3.5 57
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Basin Index (%) 96 57
UPPER N. PLATTE
Arapaho Ridge 10960 6.9 5.2 133 8.3 6.1 136
Blackhall Mtn 9820 7.5 -M * -M -M *
Columbine 9160 5.4 4.0 135 7.9 6.0 132
Divide Peak 8880 4.0 3.9 103 6.3 5.9 107
Joe Wright 10120 5.6 5.2 108 10.8 7.1 152
Laprele Creek 8375 3.8 2.2 173 4.9 3.7 132
Med Bow 10500 11.7 -M * 12.8 -M *
North French Creek 10130 9.2 5.7 161 11.0 6.6 167
Never Summer 10280 6.3 4.4 143 7.3 -M *
Old Battle 10000 9.2 6.5 142 11.4 8.7 131
Rawah 9020 2.6 2.1 124 5.4 4.4 123
Sage Creek Basin 7850 2.8 1.9 147 5.3 3.9 136
Sand Lake 10050 8.3 6.2 134 7.6 6.4 119
South Brush Creek 8440 3.0 2.2 136 4.0 4.3 93
Tower 10500 11.5 10.0 115 11.3 9.9 114
Webber Springs 9250 5.9 4.0 148 9.3 6.7 139
Willow Creek Pass 9540 4.6 3.2 144 6.2 3.9 159
Zirkel 9340 7.2 3.7 195 11.2 7.3 153
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Basin Index (%) 137 133
SWEETWATER
Deer Park 9700 3.9 3.6 108 4.3 5.1 84
Larsen Creek 9000 1.4 2.0 70 4.1 -M *
South Pass 9040 3.0 3.4 88 3.7 4.7 79
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Basin Index (%) 92 82
LOWER N. PLATTE
Casper Mtn. 7900 3.7 3.1 119 3.7 4.8 77
Laprele Creek 8375 3.8 2.2 173 4.9 3.7 132
Reno Hill 8400 4.2 3.0 140 5.1 4.4 116
Windy Peak 7900 3.4 1.6 212 3.1 3.2 97
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Basin Index (%) 153 104
LARAMIE RIVER
Brooklyn Lake 10240 6.8 4.1 166 8.4 5.0 168
Cinnabar Park 9574 6.9 4.4 157 9.1 5.7 160
Crow Creek 8330 .9 1.4 64 3.3 3.3 100
Deadman Hill 10220 5.6 4.1 137 5.8 4.7 123
Rawah 9020 2.6 2.1 124 5.4 4.4 123
Roach 9700 4.1 3.5 117 6.0 4.9 122
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Basin Index (%) 137 136
S. PLATTE
Black Mountain 8920 2.6 -M * 3.8 -M *
Crow Creek 8330 .9 1.4 64 3.3 3.3 100
Deadman Hill 10220 5.6 4.1 137 5.8 4.7 123
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Basin Index (%) 118 114
LITTLE SNAKE RIVER
Battle Mountain 7440 2.4 1.1 218* 3.1 4.1 76
Divide Peak 8880 4.0 3.9 103 6.3 5.9 107
Elk River 8700 3.6 2.4 150 4.3 4.9 88
Little Snake River 8915 6.0 3.3 182 12.5 7.3 171
Old Battle 10000 9.2 6.5 142 11.4 8.7 131
Sage Creek Basin 7850 2.8 1.9 147 5.3 3.9 136
Sandstone RS 8150 3.8 1.5 253 5.0 4.7 106
Whiskey Park 8950 6.1 4.1 149 9.8 6.3 156
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Basin Index (%) 153 126
UPPER GREEN RIVER
Big Sandy Opening 9080 2.6 3.3 79 3.9 3.6 108
Blind Bull Sum 8650 4.1 4.3 95 4.6 4.9 94
East Rim Divide 7930 1.9 1.6 119 3.2 2.9 110
Elkhart Park G.S. 9400 2.7 2.8 96 4.0 3.7 108
Gros Ventre Summit 8750 2.2 3.3 67 2.9 3.7 78
Gunsight Pass 9820 2.5 2.8 89 4.8 3.7 130
Kendall R.S. 7740 2.0 2.2 91 3.3 3.5 94
Loomis Park 8240 3.4 2.5 136 4.9 4.2 117
New Fork Lake 8340 2.1 1.9 111 2.7 3.0 90
Pocket Creek 9360 4.2 -M * 5.0 -M *
Snyder Basin 8060 2.4 2.2 109 4.2 3.4 124
Spring Creek Divide 9000 4.4 4.4 100 6.2 5.5 113
Triple Peak 8500 5.5 4.5 122 7.4 5.8 128
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Basin Index (%) 100 109
LOWER GREEN RIVER
Blacks Fork Jct 8869 .9 -M * 3.8 -M *
Buck Pasture 9632 3.2 -M * 6.4 -M *
EF Blacks Fork GS 9360 2.2 -M * 3.7 -M *
Hams Fork 7840 1.7 1.8 94 3.4 2.9 117
Hewinta 9500 1.4 1.6 88 4.3 4.1 105
Hickerson Park 9122 1.6 1.3 123 4.4 3.4 129
Hole-in-Rock 9168 1.0 1.4 71 4.0 3.3 121
Indian Creek 9425 3.7 5.0 74 3.9 5.1 76
Kelley R.S. 8180 2.6 2.6 100 3.8 4.3 88
Spirit Lk 10235 3.3 -M * 5.9 -M *
Steel Creek Park 10158 3.4 3.4 100 5.2 4.6 113
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Basin Index (%) 90 105
UPPER BEAR RIVER
Bear River RS 8777 1.4 -M * 4.5 -M *
Bug Lake 7987 2.4 3.0 80 6.2 4.8 129
Burts Miller Ranch 8000 2.7 -M * 2.6 -M *
Chalk Creek #1 9171 3.1 4.3 72 8.4 6.6 127
Hayden Fork 9130 2.2 2.6 85 6.6 5.4 122
Kelley R.S. 8180 2.6 2.6 100 3.8 4.3 88
Lily Lake 9133 2.2 2.4 92 5.0 4.8 104
Monte Cristo 8932 3.1 4.1 76 5.8 6.3 92
Salt River Summit 7640 2.0 1.6 125 4.2 3.8 111
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Basin Index (%) 85 111
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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.
