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: DECEMBER 1 , 2014
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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 7030 4.5 4.0 112 5.5 6.0 92
Black Bear 8170 7.6 9.0 84 9.2 10.6 87
Blind Bull Sum 8650 8.3 5.1 163 6.2 5.7 109
Cottonwood Creek 7670 7.6 4.4 173 9.5 6.9 138
East Rim Divide 7930 4.1 2.0 205 4.2 3.4 124
Grand Targhee 9260 11.9 9.9 120 11.4 9.8 116
Granite Creek 6770 6.3 2.6 242 6.9 5.4 128
Grassy Lake 7265 6.5 6.6 98 -M 9.9 *
Gros Ventre Summit 8750 5.4 3.7 146 3.7 4.2 88
Gunsight Pass 9820 4.2 3.3 127 4.5 4.1 110
Lewis Lake Divide 7850 5.1 7.4 69 7.6 9.8 78
Phillips Bench 8200 7.5 5.6 134 8.7 7.4 118
Salt River Summit 7760 3.4 2.1 162 5.0 4.4 114
Snake River Station 6920 4.1 3.3 124 5.9 6.6 89
Spring Creek Divide 9000 8.7 5.2 167 9.1 6.6 138
Thumb Divide 7980 2.3 3.2 72 3.8 5.4 70
Togwotee Pass 9580 8.0 7.2 111 8.8 7.3 121
Two Ocean Plateau 9240 8.4 8.6 98 7.4 8.1 91
Willow Creek 8380 7.5 5.7 132 10.2 9.6 106
Younts Peak 8350 -M 4.3 * -M 5.0 *
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Basin Index (%) 123 105
MADISON-GALLATIN
Black Bear 8170 7.6 9.0 84 9.2 10.6 87
Canyon 7870 3.6 3.0 120 4.6 4.8 96
Madison Plateau 7750 5.0 5.1 98 6.2 7.2 86
West Yellowstone 6700 2.1 1.9 111 3.7 4.2 88
Whiskey Creek 6800 3.1 3.2 97 4.6 5.8 79
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Basin Index (%) 96 87
YELLOWSTONE
Beartooth Lake 9360 7.9 6.1 130 7.2 5.5 131
Burnt Mtn 5880 2.1 1.3 162 4.3 5.1 84
Canyon 7870 3.6 3.0 120 4.6 4.8 96
Cole Creek 7850 3.4 4.1 83 3.1 5.0 62
Evening Star 9200 8.0 7.2 111 9.1 8.3 110
Fisher Creek 9100 9.7 8.8 110 9.4 9.1 103
Northeast Entrance 7350 3.3 1.7 194 5.6 4.1 137
Parker Peak 9400 6.9 6.1 113 6.7 5.6 120
Sylvan Lake 8420 4.2 5.2 81 5.9 7.2 82
Thumb Divide 7980 2.3 3.2 72 3.8 5.4 70
Two Ocean Plateau 9240 8.4 8.6 98 7.4 8.1 91
White Mill 8700 7.7 6.0 128 7.5 7.1 106
Wolverine 7650 4.5 2.0 225 5.1 4.1 124
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Basin Index (%) 114 100
WIND RIVER
Burroughs Creek 8750 4.8 3.7 130 5.7 4.8 119
Castle Creek 8400 3.1 -M * 3.5 -M *
Cold Springs 9630 2.1 2.5 84 2.7 3.7 73
Deer Park 9700 2.4 4.1 59 4.3 5.6 77
Hobbs Park 10100 2.8 4.5 62 3.9 4.5 87
Kirwin 9550 3.8 3.4 112 4.8 4.0 120
Little Warm 9370 3.4 2.9 117 4.0 4.2 95
Owl Creek 8975 1.2 1.6 75 3.1 2.2 141
South Pass 9040 2.6 3.9 67 3.3 5.3 62
St. Lawrence Alt 8620 .5 2.1 24 1.7 3.2 53
Togwotee Pass 9580 8.0 7.2 111 8.8 7.3 121
Townsend Creek 8700 1.1 2.5 44 3.1 4.3 72
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Basin Index (%) 85 92
BIGHORN BASIN
Bald Mtn. 9380 4.6 5.8 79 4.4 5.2 85
Bear Trap Meadow 8200 1.9 1.4 136 2.3 3.2 72
Bone Springs Div 9350 3.9 5.1 76 3.9 4.9 80
Grave Springs 8550 1.4 1.9 74 1.7 3.7 46
Kirwin 9550 3.8 3.4 112 4.8 4.0 120
Marquette 8760 .9 -M * 2.3 -M *
Middle Powder 7760 2.6 3.1 84 2.4 4.4 55
Owl Creek 8975 1.2 1.6 75 3.1 2.2 141
Powder River Pass 9480 3.9 2.9 134 4.8 4.1 117
Shell Creek 9580 3.8 5.0 76 4.3 4.6 93
Timber Creek 7950 1.5 1.7 88 3.1 3.2 97
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Basin Index (%) 90 88
SHOSHONE RIVER
Blackwater 9780 7.3 7.1 103 6.7 6.6 102
Evening Star 9200 8.0 7.2 111 9.1 8.3 110
Marquette 8760 .9 -M * 2.3 -M *
Sylvan Road 7120 4.0 2.8 143 6.1 5.9 103
Younts Peak 8350 -M 4.3 * -M 5.0 *
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Basin Index (%) 113 105
POWDER RIVER
Bear Trap Meadow 8200 1.9 1.4 136 2.3 3.2 72
Cloud Peak Reservoir 9860 3.7 3.8 97 4.4 4.8 92
Grave Springs 8550 1.4 1.9 74 1.7 3.7 46
Hansen Sawmill 8360 2.4 1.6 150 3.3 3.0 110
Middle Powder 7760 2.6 3.1 84 2.4 4.4 55
Powder River Pass 9480 3.9 2.9 134 4.8 4.1 117
Soldier Park 8720 1.3 -M * 2.8 -M *
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Basin Index (%) 108 81
TONGUE RIVER
Big Goose 7990 2.7 2.4 112 3.1 4.0 78
Bone Springs Div 9350 3.9 5.1 76 3.9 4.9 80
Burgess Junction 7880 3.0 3.1 97 3.4 4.2 81
Dome Lake 8880 1.7 3.7 46 3.5 4.9 71
Little Goose 8870 2.3 -M * 3.3 -M *
Sucker Creek 8880 3.1 3.3 94 3.9 4.7 83
Tie Creek 6870 1.7 .8 212 3.1 4.2 74
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Basin Index (%) 88 78
BELLE FOURCHE
Cole Canyon 5910 1.4 .8 175 2.9 3.6 81
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Basin Index (%) 175 81
CHEYENNE RIVER BASIN
Blind Park 6890 1.9 1.8 106 3.5 4.4 80
North Rapid Creek 6130 1.6 1.5 107 3.2 3.7 86
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Basin Index (%) 106 83
UPPER N. PLATTE
Arapaho Ridge 10960 4.7 5.8 81 6.2 6.8 91
Blackhall Mtn 9820 6.3 -M * 9.2 -M *
Columbine 9160 5.2 4.6 113 7.4 7.0 106
Divide Peak 8880 2.2 4.5 49 4.1 6.7 61
Joe Wright 10120 5.0 6.0 83 9.7 8.1 120
Laprele Creek 8375 1.0 2.3 43 1.9 4.1 46
Med Bow 10500 8.2 -M * 9.4 -M *
North French Creek 10130 6.7 7.0 96 7.4 7.7 96
Never Summer 10280 5.0 5.0 100 6.1 -M *
Old Battle 10000 6.4 7.8 82 8.0 9.9 81
Rawah 9020 3.4 2.5 136 6.1 4.9 124
Sage Creek Basin 7850 1.2 2.2 55 2.4 4.6 52
Sand Lake 10050 6.9 7.3 95 6.6 7.3 90
South Brush Creek 8440 1.9 2.8 68 3.0 4.9 61
Tower 10500 9.9 11.5 86 12.2 11.5 106
Webber Springs 9250 4.7 5.0 94 6.2 7.6 82
Willow Creek Pass 9540 2.8 3.7 76 4.5 4.5 100
Zirkel 9340 -M 4.7 * -M 8.1 *
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Basin Index (%) 86 90
SWEETWATER
Deer Park 9700 2.4 4.1 59 4.3 5.6 77
Larsen Creek 9000 1.7 2.5 68 3.5 -M *
South Pass 9040 2.6 3.9 67 3.3 5.3 62
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Basin Index (%) 64 70
LOWER N. PLATTE
Casper Mtn. 7900 1.4 3.5 40 2.5 5.4 46
Laprele Creek 8375 1.0 2.3 43 1.9 4.1 46
Reno Hill 8400 1.6 3.6 44 3.1 5.0 62
Windy Peak 7900 1.1 1.8 61 1.7 3.6 47
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Basin Index (%) 46 51
LARAMIE RIVER
Brooklyn Lake 10240 5.3 4.3 123 6.4 5.8 110
Cinnabar Park 9574 5.1 5.4 94 7.1 6.7 106
Crow Creek 8330 .8 2.0 40 2.8 3.6 78
Deadman Hill 10220 4.4 4.8 92 5.5 5.3 104
Rawah 9020 3.4 2.5 136 6.1 4.9 124
Roach 9700 2.3 4.0 58 4.7 5.7 82
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Basin Index (%) 93 102
S. PLATTE
Black Mountain 8920 2.6 -M * 4.5 -M *
Crow Creek 8330 .8 2.0 40 2.8 3.6 78
Deadman Hill 10220 4.4 4.8 92 5.5 5.3 104
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Basin Index (%) 76 93
LITTLE SNAKE RIVER
Battle Mountain 7440 1.7 1.5 113 3.8 4.6 83
Divide Peak 8880 2.2 4.5 49 4.1 6.7 61
Elk River 8700 3.6 3.0 120 5.3 5.7 93
Little Snake River 8915 6.0 3.8 158 9.9 8.7 114
Old Battle 10000 6.4 7.8 82 8.0 9.9 81
Sage Creek Basin 7850 1.2 2.2 55 2.4 4.6 52
Sandstone RS 8150 2.2 2.2 100 3.2 5.4 59
Whiskey Park 8950 6.9 4.8 144 8.1 7.4 109
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Basin Index (%) 101 85
UPPER GREEN RIVER
Big Sandy Opening 9080 3.4 3.7 92 3.4 4.0 85
Blind Bull Sum 8650 8.3 5.1 163 6.2 5.7 109
East Rim Divide 7930 4.1 2.0 205 4.2 3.4 124
Elkhart Park G.S. 9400 3.1 3.3 94 4.5 4.2 107
Gros Ventre Summit 8750 5.4 3.7 146 3.7 4.2 88
Gunsight Pass 9820 4.2 3.3 127 4.5 4.1 110
Kendall R.S. 7740 3.8 2.6 146 3.9 4.0 98
Loomis Park 8240 5.3 3.2 166 5.8 4.8 121
New Fork Lake 8340 4.1 2.3 178 3.8 3.4 112
Pocket Creek 9360 2.8 -M * 2.2 -M *
Snider Basin 8060 4.6 2.8 164 5.9 3.9 151
Spring Creek Divide 9000 8.7 5.2 167 9.1 6.6 138
Triple Peak 8500 9.8 5.0 196 10.3 6.8 151
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Basin Index (%) 154 119
LOWER GREEN RIVER
Blacks Fork Jct 8870 1.7 -M * 3.4 -M *
Buck Pasture 9700 3.3 -M * 2.5 -M *
EF Blacks Fork GS 9360 2.4 -M * 3.6 -M *
Hams Fork 7840 3.2 2.2 145 3.3 3.3 100
Hewinta 9519 1.9 2.0 95 3.6 4.6 78
Hickerson Park 9145 2.2 1.5 147 2.9 3.8 76
Hole-in-Rock 9150 .9 1.7 53 2.4 3.6 67
Indian Creek 9425 5.5 5.7 96 6.8 6.0 113
Kelley R.S. 8180 4.2 3.0 140 4.8 5.0 96
Spirit Lk 10235 2.0 -M * 3.3 -M *
Steel Creek Park 10200 2.8 4.0 70 4.0 5.3 75
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Basin Index (%) 103 88
UPPER BEAR RIVER
Bear River RS 8777 1.7 -M * 2.7 -M *
Bug Lake 7950 4.4 3.5 126 4.2 5.5 76
Burts Miller Ranch 8000 1.6 -M * 1.4 -M *
Chalk Creek #1 8993 3.9 5.3 74 4.4 7.6 58
Hayden Fork 9212 2.9 3.0 97 4.9 6.3 78
Kelley R.S. 8180 4.2 3.0 140 4.8 5.0 96
Lily Lake 9156 2.1 2.9 72 3.5 5.5 64
Monte Cristo 8960 4.9 5.6 88 4.8 7.3 66
Salt River Summit 7760 3.4 2.1 162 5.0 4.4 114
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Basin Index (%) 102 76
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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.
