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 WEDNESDAY: NOVEMBER 28 , 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 3.3 3.5 94 5.3 5.7 93
Black Bear 8170 -M 8.4 * -M 10.0 *
Blind Bull Sum 8650 4.3 4.6 93 4.7 5.3 89
Cottonwood Creek 7670 4.4 3.8 116 6.7 6.4 105
East Rim Divide 7930 2.0 1.8 111 3.4 3.2 106
Grand Targhee 9260 12.6 9.6 131 11.0 9.5 116
Granite Creek 6770 2.9 2.3 126 5.4 5.0 108
Grassy Lake 7265 4.9 6.2 79 8.3 9.2 90
Gros Ventre Summit 8750 2.3 3.5 66 3.3 4.0 82
Gunsight Pass 9820 2.7 3.1 87 5.0 4.0 125
Lewis Lake Divide 7850 5.0 6.8 74 8.6 9.2 93
Phillips Bench 8200 4.2 5.0 84 7.6 6.9 110
Salt River Summit 7640 2.1 1.8 117 4.3 4.1 105
Snake River Station 6920 3.2 3.1 103 7.4 6.2 119
Spring Creek Divide 9000 4.8 4.8 100 6.5 6.0 108
Thumb Divide 7980 2.0 3.0 67 4.5 5.1 88
Togwotee Pass 9580 6.8 6.6 103 7.7 6.8 113
Two Ocean Plateau 9240 7.7 8.3 93 6.5 7.6 86
Willow Creek 8080 5.0 5.2 96 9.3 9.0 103
Younts Peak 8350 -M 4.1 * -M 4.8 *
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Basin Index (%) 97 102
MADISON-GALLATIN
Black Bear 8170 -M 8.4 * -M 10.0 *
Canyon 7870 2.2 2.9 76 4.1 4.5 91
Madison Plateau 7750 3.3 4.8 69 5.4 6.8 79
West Yellowstone 6700 1.9 1.7 112 3.5 4.0 88
Whiskey Creek 6800 1.6 2.9 55 2.6 5.5 47
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Basin Index (%) 73 75
YELLOWSTONE
Beartooth Lake 9360 5.3 5.7 93 4.6 5.2 88
Burnt Mtn 5880 2.2 1.1 200 5.6 5.0 112
Canyon 7870 2.2 2.9 76 4.1 4.5 91
Cole Creek 7850 6.3 3.8 166 5.4 4.8 112
Evening Star 9200 7.6 6.9 110 10.3 7.8 132
Fisher Creek 9100 6.6 8.4 79 10.2 8.6 119
Northeast Entrance 7350 2.6 1.5 173 5.2 3.9 133
Parker Peak 9400 7.1 5.8 122 8.2 5.4 152
Sylvan Lake 8420 6.0 4.9 122 10.3 6.8 151
Thumb Divide 7980 2.0 3.0 67 4.5 5.1 88
Two Ocean Plateau 9240 7.7 8.3 93 6.5 7.6 86
White Mill 8700 5.2 5.7 91 5.3 6.7 79
Wolverine 7650 2.5 1.8 139 4.7 3.9 121
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Basin Index (%) 106 113
WIND RIVER
Burroughs Creek 8750 2.3 -M * 3.8 -M *
Castle Creek 8400 1.0 -M * 2.3 -M *
Cold Springs 9630 2.1 2.3 91 2.6 3.5 74
Deer Park 9700 4.0 3.9 103 4.7 5.4 87
Hobbs Park 10100 3.8 4.3 88 3.6 4.3 84
Kirwin 9550 2.6 3.3 79 2.9 3.8 76
Little Warm 9370 1.9 2.7 70 3.5 4.0 88
Owl Creek 8975 2.3 1.5 153 2.9 2.1 138
South Pass 9040 3.2 3.7 86 4.0 5.1 78
St. Lawrence Alt 8620 1.6 2.0 80 3.3 3.1 106
Togwotee Pass 9580 6.8 6.6 103 7.7 6.8 113
Townsend Creek 8700 3.1 2.4 129 4.2 4.1 102
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Basin Index (%) 96 93
BIGHORN BASIN
Bald Mtn. 9380 7.0 5.6 125 4.7 5.0 94
Bear Trap Meadow 8200 3.1 1.4 221 3.5 3.0 117
Bone Springs Div 9350 5.2 4.9 106 4.8 4.7 102
Grave Springs 8550 2.7 1.7 159 4.2 3.6 117
Kirwin 9550 2.6 3.3 79 2.9 3.8 76
Marquette 8760 3.1 -M * 4.1 -M *
Middle Powder 7760 3.3 2.8 118 3.0 4.3 70
Owl Creek 8975 2.3 1.5 153 2.9 2.1 138
Powder River Pass 9480 3.5 2.7 130 3.6 3.9 92
Shell Creek 9580 6.0 4.9 122 5.5 4.4 125
Timber Creek 7950 1.4 1.6 88 2.8 3.1 90
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Basin Index (%) 122 100
SHOSHONE RIVER
Blackwater 9780 8.4 6.8 124 8.7 6.2 140
Evening Star 9200 7.6 6.9 110 10.3 7.8 132
Marquette 8760 3.1 -M * 4.1 -M *
Sylvan Road 7120 3.2 2.5 128 5.9 5.6 105
Younts Peak 8350 -M 4.1 * -M 4.8 *
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Basin Index (%) 119 127
POWDER RIVER
Bear Trap Meadow 8200 3.1 1.4 221 3.5 3.0 117
Cloud Peak Reservoir 9860 5.3 3.7 143 5.4 4.6 117
Grave Springs 8550 2.7 1.7 159 4.2 3.6 117
Hansen Sawmill 8360 1.8 1.5 120 3.5 3.0 117
Middle Powder 7760 3.3 2.8 118 3.0 4.3 70
Powder River Pass 9480 3.5 2.7 130 3.6 3.9 92
Soldier Park 8720 1.7 -M * 3.5 -M *
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Basin Index (%) 143 104
TONGUE RIVER
Big Goose 7990 2.5 2.2 114 4.8 3.9 123
Bone Springs Div 9350 5.2 4.9 106 4.8 4.7 102
Burgess Junction 7880 2.8 2.9 97 4.0 4.0 100
Dome Lake 8880 2.9 3.4 85 3.9 4.7 83
Little Goose 8870 3.8 -M * 3.6 -M *
Sucker Creek 8880 4.6 3.2 144 4.6 4.5 102
Tie Creek 6870 1.6 .7 229 5.2 4.0 130
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Basin Index (%) 113 106
BELLE FOURCHE
Cole Canyon 5910 1.0 .7 143 3.5 3.4 103
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Basin Index (%) 143 103
CHEYENNE RIVER BASIN
Blind Park 6890 1.6 1.7 94 2.3 4.2 55
North Rapid Creek 6130 1.2 1.4 86 2.1 3.6 58
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Basin Index (%) 90 56
UPPER N. PLATTE
Arapaho Ridge 10960 7.0 5.5 127 8.6 6.4 134
Blackhall Mtn 9820 7.6 -M * 10.9 -M *
Columbine 9160 5.4 4.3 126 8.6 6.4 134
Divide Peak 8880 4.1 4.1 100 6.9 6.3 110
Joe Wright 10120 5.7 5.6 102 10.9 7.6 143
Laprele Creek 8375 3.8 2.3 165 5.1 3.9 131
Med Bow 10500 11.5 -M * 12.9 -M *
North French Creek 10130 9.2 6.4 144 11.1 7.2 154
Never Summer 10280 6.4 4.7 136 7.4 -M *
Old Battle 10000 9.2 7.1 130 11.7 9.3 126
Rawah 9020 2.6 2.3 113 5.5 4.5 122
Sage Creek Basin 7850 2.9 2.1 138 5.4 4.4 123
Sand Lake 10050 8.5 6.8 125 7.8 6.8 115
South Brush Creek 8440 3.0 2.5 120 4.4 4.6 96
Tower 10500 11.7 10.8 108 11.9 10.7 111
Webber Springs 9250 5.9 4.4 134 9.5 7.1 134
Willow Creek Pass 9540 4.7 3.4 138 6.4 4.2 152
Zirkel 9340 7.2 4.3 167 11.5 7.7 149
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Basin Index (%) 127 129
SWEETWATER
Deer Park 9700 4.0 3.9 103 4.7 5.4 87
Larsen Creek 9000 1.7 2.3 74 4.3 -M *
South Pass 9040 3.2 3.7 86 4.0 5.1 78
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Basin Index (%) 90 83
LOWER N. PLATTE
Casper Mtn. 7900 3.6 3.2 112 4.0 5.2 77
Laprele Creek 8375 3.8 2.3 165 5.1 3.9 131
Reno Hill 8400 4.3 3.3 130 5.5 4.7 117
Windy Peak 7900 3.4 1.7 200 3.5 3.4 103
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Basin Index (%) 144 105
LARAMIE RIVER
Brooklyn Lake 10240 6.9 4.1 168 8.7 5.3 164
Cinnabar Park 9574 7.0 4.9 143 9.2 6.1 151
Crow Creek 8330 .8 1.6 50 3.3 3.4 97
Deadman Hill 10220 5.6 4.5 124 6.1 5.0 122
Rawah 9020 2.6 2.3 113 5.5 4.5 122
Roach 9700 4.3 3.7 116 6.2 5.3 117
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Basin Index (%) 129 132
S. PLATTE
Black Mountain 8920 2.6 -M * 3.8 -M *
Crow Creek 8330 .8 1.6 50 3.3 3.4 97
Deadman Hill 10220 5.6 4.5 124 6.1 5.0 122
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Basin Index (%) 105 112
LITTLE SNAKE RIVER
Battle Mountain 7440 2.4 1.3 185 -M 4.3 *
Divide Peak 8880 4.1 4.1 100 6.9 6.3 110
Elk River 8700 3.5 2.7 130 4.7 5.3 89
Little Snake River 8915 6.0 3.6 167 12.6 8.1 156
Old Battle 10000 9.2 7.1 130 11.7 9.3 126
Sage Creek Basin 7850 2.9 2.1 138 5.4 4.4 123
Sandstone RS 8150 3.8 1.8 211 5.4 5.1 106
Whiskey Park 8950 6.1 4.4 139 9.9 6.9 143
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Basin Index (%) 140 125
UPPER GREEN RIVER
Big Sandy Opening 9080 2.8 3.5 80 4.2 3.8 111
Blind Bull Sum 8650 4.3 4.6 93 4.7 5.3 89
East Rim Divide 7930 2.0 1.8 111 3.4 3.2 106
Elkhart Park G.S. 9400 3.0 3.0 100 4.3 4.0 108
Gros Ventre Summit 8750 2.3 3.5 66 3.3 4.0 82
Gunsight Pass 9820 2.7 3.1 87 5.0 4.0 125
Kendall R.S. 7740 2.1 2.4 88 3.4 3.8 89
Loomis Park 8240 3.4 2.9 117 5.0 4.5 111
New Fork Lake 8340 2.1 2.1 100 3.0 3.2 94
Pocket Creek 9360 4.6 -M * 5.3 -M *
Snyder Basin 8060 2.7 2.6 104 4.7 3.7 127
Spring Creek Divide 9000 4.8 4.8 100 6.5 6.0 108
Triple Peak 8500 5.6 4.8 117 7.6 6.3 121
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Basin Index (%) 97 106
LOWER GREEN RIVER
Blacks Fork Jct 8869 1.1 -M * 3.7 -M *
Buck Pasture 9632 3.3 -M * 6.3 -M *
EF Blacks Fork GS 9360 2.4 -M * 3.7 -M *
Hams Fork 7840 1.9 2.0 95 3.6 3.2 112
Hewinta 9500 1.6 1.8 89 4.5 4.3 105
Hickerson Park 9122 1.7 1.4 121 4.5 3.6 125
Hole-in-Rock 9168 1.1 1.6 69 4.1 3.4 121
Indian Creek 9425 4.0 5.3 75 4.3 5.5 78
Kelley R.S. 8180 2.8 2.8 100 3.9 4.6 85
Spirit Lk 10235 3.5 -M * 6.0 -M *
Steel Creek Park 10158 3.4 3.7 92 5.3 5.0 106
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Basin Index (%) 89 102
UPPER BEAR RIVER
Bear River RS 8777 1.4 -M * 4.5 -M *
Bug Lake 7987 2.3 3.3 70 6.3 5.1 124
Burts Miller Ranch 8000 2.4 -M * 2.7 -M *
Chalk Creek #1 9171 3.2 4.7 68 8.4 7.2 117
Hayden Fork 9130 2.2 2.8 79 6.6 5.9 112
Kelley R.S. 8180 2.8 2.8 100 3.9 4.6 85
Lily Lake 9133 2.3 2.6 88 4.5 5.2 87
Monte Cristo 8932 3.1 4.9 63 5.9 6.8 87
Salt River Summit 7640 2.1 1.8 117 4.3 4.1 105
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Basin Index (%) 79 103
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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.
