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: NOVEMBER 30 , 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 3.8 3.9 97 5.9 5.9 100
Black Bear 8170 -M 8.8 * -M 10.4 *
Blind Bull Sum 8650 4.7 4.9 96 5.0 5.6 89
Cottonwood Creek 7670 4.8 4.2 114 7.1 6.8 104
East Rim Divide 7930 2.1 1.9 111 3.4 3.4 100
Grand Targhee 9260 13.3 9.8 136 11.6 9.7 120
Granite Creek 6770 3.1 2.5 124 5.6 5.3 106
Grassy Lake 7265 6.0 6.5 92 9.4 9.7 97
Gros Ventre Summit 8750 2.3 3.7 62 3.1 4.1 76
Gunsight Pass 9820 2.7 3.2 84 5.0 4.0 125
Lewis Lake Divide 7850 5.4 7.2 75 9.0 9.6 94
Phillips Bench 8200 4.5 5.5 82 7.9 7.3 108
Salt River Summit 7640 2.3 2.0 115 4.6 4.4 105
Snake River Station 6920 3.5 3.3 106 7.8 6.5 120
Spring Creek Divide 9000 5.3 5.0 106 7.1 6.4 111
Thumb Divide 7980 2.0 3.1 65 4.5 5.3 85
Togwotee Pass 9580 7.0 7.0 100 8.0 7.1 113
Two Ocean Plateau 9240 8.0 8.4 95 7.0 7.9 89
Willow Creek 8080 5.4 5.6 96 9.6 9.5 101
Younts Peak 8350 -M 4.3 * -M 4.9 *
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Basin Index (%) 98 103
MADISON-GALLATIN
Black Bear 8170 -M 8.8 * -M 10.4 *
Canyon 7870 2.4 3.0 80 4.0 4.7 85
Madison Plateau 7750 3.4 4.9 69 5.4 7.1 76
West Yellowstone 6700 1.8 1.8 100 3.3 4.2 79
Whiskey Creek 6800 1.5 3.1 48 2.4 5.7 42
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Basin Index (%) 71 70
YELLOWSTONE
Beartooth Lake 9360 5.2 6.0 87 4.4 5.4 81
Burnt Mtn 5880 2.1 1.2 175 5.4 5.1 106
Canyon 7870 2.4 3.0 80 4.0 4.7 85
Cole Creek 7850 6.3 4.0 158 6.4 4.9 131
Evening Star 9200 8.1 7.1 114 10.7 8.2 130
Fisher Creek 9100 6.7 8.6 78 10.1 9.0 112
Northeast Entrance 7350 2.7 1.6 169 5.2 4.1 127
Parker Peak 9400 7.4 6.0 123 8.5 5.6 152
Sylvan Lake 8420 6.4 5.0 128 10.6 7.1 149
Thumb Divide 7980 2.0 3.1 65 4.5 5.3 85
Two Ocean Plateau 9240 8.0 8.4 95 7.0 7.9 89
White Mill 8700 5.3 5.9 90 5.1 7.0 73
Wolverine 7650 2.6 2.0 130 4.7 4.0 118
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Basin Index (%) 105 111
WIND RIVER
Burroughs Creek 8750 2.2 -M * 3.5 -M *
Castle Creek 8400 .9 -M * 2.1 -M *
Cold Springs 9630 2.1 2.5 84 2.3 3.6 64
Deer Park 9700 4.0 4.1 98 4.5 5.5 82
Hobbs Park 10100 3.7 4.5 82 3.3 4.4 75
Kirwin 9550 2.4 3.4 71 2.5 3.9 64
Little Warm 9370 1.7 2.8 61 2.7 4.2 64
Owl Creek 8975 2.2 1.6 138 2.8 2.2 127
South Pass 9040 3.1 3.9 79 3.9 5.3 74
St. Lawrence Alt 8620 1.3 2.0 65 3.3 3.2 103
Togwotee Pass 9580 7.0 7.0 100 8.0 7.1 113
Townsend Creek 8700 2.9 2.4 121 4.0 4.2 95
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Basin Index (%) 89 86
BIGHORN BASIN
Bald Mtn. 9380 7.1 5.8 122 3.9 5.1 76
Bear Trap Meadow 8200 3.0 1.4 214 3.2 3.1 103
Bone Springs Div 9350 5.3 5.0 106 4.7 4.8 98
Grave Springs 8550 2.7 1.8 150 3.7 3.7 100
Kirwin 9550 2.4 3.4 71 2.5 3.9 64
Marquette 8760 3.0 -M * 3.8 -M *
Middle Powder 7760 3.3 3.0 110 2.9 4.4 66
Owl Creek 8975 2.2 1.6 138 2.8 2.2 127
Powder River Pass 9480 3.6 2.9 124 3.3 4.0 82
Shell Creek 9580 5.9 5.0 118 5.4 4.6 117
Timber Creek 7950 1.3 1.7 76 2.9 3.2 91
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Basin Index (%) 116 91
SHOSHONE RIVER
Blackwater 9780 8.4 7.1 118 8.7 6.4 136
Evening Star 9200 8.1 7.1 114 10.7 8.2 130
Marquette 8760 3.0 -M * 3.8 -M *
Sylvan Road 7120 3.5 2.8 125 6.0 5.8 103
Younts Peak 8350 -M 4.3 * -M 4.9 *
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Basin Index (%) 118 125
POWDER RIVER
Bear Trap Meadow 8200 3.0 1.4 214 3.2 3.1 103
Cloud Peak Reservoir 9860 5.1 3.8 134 4.8 4.7 102
Grave Springs 8550 2.7 1.8 150 3.7 3.7 100
Hansen Sawmill 8360 1.7 1.6 106 3.4 3.0 113
Middle Powder 7760 3.3 3.0 110 2.9 4.4 66
Powder River Pass 9480 3.6 2.9 124 3.3 4.0 82
Soldier Park 8720 1.4 -M * 3.2 -M *
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Basin Index (%) 134 93
TONGUE RIVER
Big Goose 7990 2.3 2.4 96 4.4 4.0 110
Bone Springs Div 9350 5.3 5.0 106 4.7 4.8 98
Burgess Junction 7880 2.8 3.0 93 3.7 4.1 90
Dome Lake 8880 2.7 3.6 75 3.6 4.8 75
Little Goose 8870 3.7 -M * 3.6 -M *
Sucker Creek 8880 4.5 3.2 141 4.3 4.6 93
Tie Creek 6870 1.4 .8 175 4.9 4.1 120
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Basin Index (%) 106 97
BELLE FOURCHE
Cole Canyon 5910 1.0 .7 143 3.4 3.5 97
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Basin Index (%) 143 97
CHEYENNE RIVER BASIN
Blind Park 6890 1.6 1.7 94 2.3 4.3 53
North Rapid Creek 6130 1.1 1.5 73 2.1 3.7 57
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Basin Index (%) 84 55
UPPER N. PLATTE
Arapaho Ridge 10960 7.9 5.7 139 9.4 6.7 140
Blackhall Mtn 9820 8.5 -M * 11.8 -M *
Columbine 9160 6.2 4.6 135 9.0 6.9 130
Divide Peak 8880 4.8 4.4 109 7.5 6.6 114
Joe Wright 10120 6.1 5.8 105 11.3 7.9 143
Laprele Creek 8375 4.1 2.3 178 5.2 4.0 130
Med Bow 10500 12.6 -M * 13.8 -M *
North French Creek 10130 9.9 6.8 146 11.7 7.5 156
Never Summer 10280 6.9 4.9 141 7.6 -M *
Old Battle 10000 10.2 7.6 134 12.5 9.8 128
Rawah 9020 2.8 2.4 117 5.8 4.7 123
Sage Creek Basin 7850 3.5 2.2 159 6.0 4.5 133
Sand Lake 10050 9.1 7.2 126 8.1 7.1 114
South Brush Creek 8440 3.4 2.7 126 4.6 4.8 96
Tower 10500 13.0 11.4 114 12.9 11.3 114
Webber Springs 9250 6.6 4.8 138 10.0 7.5 133
Willow Creek Pass 9540 5.1 3.6 142 6.8 4.4 155
Zirkel 9340 7.9 4.6 172 12.2 7.9 154
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Basin Index (%) 133 131
SWEETWATER
Deer Park 9700 4.0 4.1 98 4.5 5.5 82
Larsen Creek 9000 1.7 2.4 71 4.4 -M *
South Pass 9040 3.1 3.9 79 3.9 5.3 74
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Basin Index (%) 85 78
LOWER N. PLATTE
Casper Mtn. 7900 3.8 3.4 112 4.1 5.3 77
Laprele Creek 8375 4.1 2.3 178 5.2 4.0 130
Reno Hill 8400 4.4 3.5 126 5.6 4.9 114
Windy Peak 7900 3.5 1.7 206 3.6 3.5 103
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Basin Index (%) 145 105
LARAMIE RIVER
Brooklyn Lake 10240 7.6 4.2 181 9.1 5.6 162
Cinnabar Park 9574 7.6 5.3 143 9.8 6.4 153
Crow Creek 8330 1.2 1.8 67 3.7 3.5 106
Deadman Hill 10220 6.0 4.7 128 6.3 5.2 121
Rawah 9020 2.8 2.4 117 5.8 4.7 123
Roach 9700 4.7 3.9 121 6.7 5.6 120
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Basin Index (%) 134 134
S. PLATTE
Black Mountain 8920 2.6 -M * 3.9 -M *
Crow Creek 8330 1.2 1.8 67 3.7 3.5 106
Deadman Hill 10220 6.0 4.7 128 6.3 5.2 121
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Basin Index (%) 111 115
LITTLE SNAKE RIVER
Battle Mountain 7440 3.2 1.5 213 5.4 4.5 120
Divide Peak 8880 4.8 4.4 109 7.5 6.6 114
Elk River 8700 4.3 3.0 143 4.9 5.6 88
Little Snake River 8915 7.2 3.7 195 13.9 8.4 165
Old Battle 10000 10.2 7.6 134 12.5 9.8 128
Sage Creek Basin 7850 3.5 2.2 159 6.0 4.5 133
Sandstone RS 8150 4.7 2.1 224 5.9 5.3 111
Whiskey Park 8950 7.2 4.6 157 10.9 7.2 151
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Basin Index (%) 155 129
UPPER GREEN RIVER
Big Sandy Opening 9080 2.9 3.6 81 4.2 4.0 105
Blind Bull Sum 8650 4.7 4.9 96 5.0 5.6 89
East Rim Divide 7930 2.1 1.9 111 3.4 3.4 100
Elkhart Park G.S. 9400 3.0 3.2 94 4.3 4.1 105
Gros Ventre Summit 8750 2.3 3.7 62 3.1 4.1 76
Gunsight Pass 9820 2.7 3.2 84 5.0 4.0 125
Kendall R.S. 7740 2.2 2.5 88 3.5 3.9 90
Loomis Park 8240 3.6 3.1 116 5.2 4.7 111
New Fork Lake 8340 2.2 2.2 100 2.9 3.3 88
Pocket Creek 9360 4.6 -M * 5.4 -M *
Snyder Basin 8060 2.9 2.8 104 4.8 3.8 126
Spring Creek Divide 9000 5.3 5.0 106 7.1 6.4 111
Triple Peak 8500 6.0 5.0 120 8.0 6.7 119
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Basin Index (%) 97 105
LOWER GREEN RIVER
Blacks Fork Jct 8869 1.4 -M * 4.1 -M *
Buck Pasture 9632 3.8 -M * 6.8 -M *
EF Blacks Fork GS 9360 2.5 -M * 3.2 -M *
Hams Fork 7840 2.2 2.1 105 3.9 3.3 118
Hewinta 9500 1.8 1.9 95 4.8 4.5 107
Hickerson Park 9122 1.9 1.5 127 4.7 3.8 124
Hole-in-Rock 9168 1.2 1.6 75 4.3 3.5 123
Indian Creek 9425 4.4 5.6 79 4.4 5.8 76
Kelley R.S. 8180 3.3 2.9 114 4.4 4.9 90
Spirit Lk 10235 4.0 -M * 6.4 -M *
Steel Creek Park 10158 3.7 3.9 95 5.6 5.2 108
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Basin Index (%) 95 104
UPPER BEAR RIVER
Bear River RS 8777 1.7 -M * 4.8 -M *
Bug Lake 7987 3.2 3.5 91 7.3 5.4 135
Burts Miller Ranch 8000 2.7 -M * 2.8 -M *
Chalk Creek #1 9171 4.0 5.1 78 9.3 7.5 124
Hayden Fork 9130 2.9 3.0 97 7.3 6.2 118
Kelley R.S. 8180 3.3 2.9 114 4.4 4.9 90
Lily Lake 9133 2.6 2.8 93 5.3 5.4 98
Monte Cristo 8932 4.8 5.4 89 7.2 7.1 101
Salt River Summit 7640 2.3 2.0 115 4.6 4.4 105
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Basin Index (%) 94 111
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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.
