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 23 , 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 2.0 2.5 80 4.1 4.9 84
Black Bear 8170 4.2 7.4 57 7.1 8.7 82
Blind Bull Sum 8650 2.9 4.0 72 3.7 4.5 82
Cottonwood Creek 7670 3.2 3.1 103 5.3 5.6 95
East Rim Divide 7930 1.2 1.5 80 2.6 2.8 93
Grand Targhee 9260 8.7 9.1 96 9.3 9.2 101
Granite Creek 6770 1.8 1.7 106 4.2 4.4 95
Grassy Lake 7265 3.2 4.9 65 6.6 8.0 82
Gros Ventre Summit 8750 1.5 3.1 48 2.5 3.5 71
Gunsight Pass 9820 1.9 2.7 70 4.2 3.6 117
Lewis Lake Divide 7850 2.5 5.5 45 6.2 8.0 78
Phillips Bench 8200 2.5 4.1 61 5.9 5.9 100
Salt River Summit 7640 1.2 1.4 86 3.4 3.6 94
Snake River Station 6920 1.9 2.1 90 6.2 5.4 115
Spring Creek Divide 9000 3.4 4.0 85 5.3 5.3 100
Thumb Divide 7980 1.0 2.4 42 3.4 4.6 74
Togwotee Pass 9580 5.5 5.7 96 6.5 6.0 108
Two Ocean Plateau 9240 5.8 7.3 79 5.2 6.7 78
Willow Creek 8080 3.6 4.2 86 7.8 7.8 100
Younts Peak 8350 -M 3.4 * -M 4.3 *
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Basin Index (%) 76 92
MADISON-GALLATIN
Black Bear 8170 4.2 7.4 57 7.1 8.7 82
Canyon 7870 1.4 2.3 61 3.5 4.0 88
Madison Plateau 7750 2.3 4.0 58 4.4 5.9 75
West Yellowstone 6700 1.3 1.4 93 2.9 3.5 83
Whiskey Creek 6800 .9 2.4 38 2.2 4.8 46
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Basin Index (%) 58 75
YELLOWSTONE
Beartooth Lake 9360 4.4 5.3 83 3.8 4.6 83
Burnt Mtn 5880 1.3 .9 144 4.5 4.7 96
Canyon 7870 1.4 2.3 61 3.5 4.0 88
Cole Creek 7850 4.7 3.4 138 4.5 4.5 100
Evening Star 9200 5.9 6.0 98 8.5 6.9 123
Fisher Creek 9100 5.4 7.3 74 8.9 7.6 117
Northeast Entrance 7350 2.0 1.2 167 4.6 3.5 131
Parker Peak 9400 5.9 5.1 116 6.8 4.8 142
Sylvan Lake 8420 4.7 4.2 112 8.7 6.1 143
Thumb Divide 7980 1.0 2.4 42 3.4 4.6 74
Two Ocean Plateau 9240 5.8 7.3 79 5.2 6.7 78
White Mill 8700 4.2 5.0 84 4.4 6.0 73
Wolverine 7650 1.5 1.3 115 3.8 3.4 112
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Basin Index (%) 93 105
WIND RIVER
Burroughs Creek 8750 1.6 -M * 3.1 -M *
Castle Creek 8400 .7 -M * 1.9 -M *
Cold Springs 9630 1.8 1.9 95 2.2 3.2 69
Deer Park 9700 2.6 3.5 74 3.1 4.9 63
Hobbs Park 10100 2.7 3.9 69 3.0 3.8 79
Kirwin 9550 1.8 3.0 60 2.2 3.4 65
Little Warm 9370 1.5 2.4 62 2.9 3.6 81
Owl Creek 8975 2.0 1.4 143 2.6 2.0 130
South Pass 9040 1.8 3.2 56 2.7 4.5 60
St. Lawrence Alt 8620 1.3 1.7 76 3.1 2.8 111
Togwotee Pass 9580 5.5 5.7 96 6.5 6.0 108
Townsend Creek 8700 2.2 2.0 110 3.8 3.6 106
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Basin Index (%) 81 85
BIGHORN BASIN
Bald Mtn. 9380 6.0 4.9 122 4.0 4.6 87
Bear Trap Meadow 8200 2.7 1.2 225 3.2 2.8 114
Bone Springs Div 9350 4.3 4.5 96 4.0 4.3 93
Grave Springs 8550 2.3 1.5 153 3.3 3.3 100
Kirwin 9550 1.8 3.0 60 2.2 3.4 65
Marquette 8760 1.6 -M * 2.4 -M *
Middle Powder 7760 3.1 2.2 141 2.9 3.9 74
Owl Creek 8975 2.0 1.4 143 2.6 2.0 130
Powder River Pass 9480 3.0 2.4 125 3.2 3.5 91
Shell Creek 9580 5.2 4.3 121 4.8 4.0 120
Timber Creek 7950 1.0 1.4 71 2.5 3.0 83
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Basin Index (%) 117 94
SHOSHONE RIVER
Blackwater 9780 6.5 5.8 112 6.9 5.5 125
Evening Star 9200 5.9 6.0 98 8.5 6.9 123
Marquette 8760 1.6 -M * 2.4 -M *
Sylvan Road 7120 1.8 1.9 95 4.5 4.8 94
Younts Peak 8350 -M 3.4 * -M 4.3 *
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Basin Index (%) 104 116
POWDER RIVER
Bear Trap Meadow 8200 2.7 1.2 225 3.2 2.8 114
Cloud Peak Reservoir 9860 4.2 3.5 120 4.3 4.2 102
Grave Springs 8550 2.3 1.5 153 3.3 3.3 100
Hansen Sawmill 8360 .8 1.3 62 2.5 2.8 89
Middle Powder 7760 3.1 2.2 141 2.9 3.9 74
Powder River Pass 9480 3.0 2.4 125 3.2 3.5 91
Soldier Park 8720 .8 -M * 2.7 -M *
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Basin Index (%) 133 95
TONGUE RIVER
Big Goose 7990 1.8 2.0 90 3.8 3.6 106
Bone Springs Div 9350 4.3 4.5 96 4.0 4.3 93
Burgess Junction 7880 2.4 2.6 92 3.6 3.7 97
Dome Lake 8880 2.1 3.1 68 3.1 4.3 72
Little Goose 8870 2.8 -M * 3.0 -M *
Sucker Creek 8880 3.8 2.9 131 3.8 4.2 90
Tie Creek 6870 1.0 .6 167 4.7 3.8 124
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Basin Index (%) 98 96
BELLE FOURCHE
Cole Canyon 5910 1.0 .6 167 3.4 3.2 106
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Basin Index (%) 167 106
CHEYENNE RIVER BASIN
Blind Park 6890 1.3 1.4 93 2.2 4.0 55
North Rapid Creek 6130 .8 1.1 73 1.8 3.4 53
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Basin Index (%) 84 54
UPPER N. PLATTE
Arapaho Ridge 10960 5.3 5.0 106 6.9 5.9 117
Blackhall Mtn 9820 4.7 -M * 8.2 -M *
Columbine 9160 3.7 3.7 100 6.9 5.6 123
Divide Peak 8880 2.9 3.7 78 5.5 5.7 96
Joe Wright 10120 4.7 5.0 94 9.7 6.8 143
Laprele Creek 8375 2.4 2.1 114 3.8 3.6 106
Med Bow 10500 8.3 -M * 9.9 -M *
North French Creek 10130 7.3 5.3 138 9.2 6.4 144
Never Summer 10280 5.2 4.3 121 6.5 -M *
Old Battle 10000 6.6 6.2 106 8.9 8.3 107
Rawah 9020 2.0 1.9 105 4.9 4.2 117
Sage Creek Basin 7850 1.9 1.8 106 4.4 3.8 116
Sand Lake 10050 5.9 5.8 102 5.5 6.1 90
South Brush Creek 8440 2.5 2.0 125 3.9 4.1 95
Tower 10500 8.8 9.4 94 8.6 9.5 91
Webber Springs 9250 3.6 3.9 92 7.0 6.4 109
Willow Creek Pass 9540 3.5 3.0 117 5.3 3.8 139
Zirkel 9340 4.6 3.5 131 8.5 7.1 120
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Basin Index (%) 106 113
SWEETWATER
Deer Park 9700 2.6 3.5 74 3.1 4.9 63
Larsen Creek 9000 .7 1.8 39 3.2 -M *
South Pass 9040 1.8 3.2 56 2.7 4.5 60
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Basin Index (%) 60 62
LOWER N. PLATTE
Casper Mtn. 7900 2.6 3.0 87 3.3 4.6 72
Laprele Creek 8375 2.4 2.1 114 3.8 3.6 106
Reno Hill 8400 2.8 2.8 100 4.1 4.3 95
Windy Peak 7900 2.2 1.5 147 2.5 3.1 81
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Basin Index (%) 106 88
LARAMIE RIVER
Brooklyn Lake 10240 4.2 4.0 105 6.1 4.9 124
Cinnabar Park 9574 5.6 4.1 137 7.7 5.5 140
Crow Creek 8330 .6 1.3 46 2.9 3.1 94
Deadman Hill 10220 4.3 4.0 108 4.7 4.6 102
Rawah 9020 2.0 1.9 105 4.9 4.2 117
Roach 9700 3.1 3.3 94 5.0 4.8 104
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Basin Index (%) 106 115
S. PLATTE
Black Mountain 8920 1.8 -M * 3.0 -M *
Crow Creek 8330 .6 1.3 46 2.9 3.1 94
Deadman Hill 10220 4.3 4.0 108 4.7 4.6 102
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Basin Index (%) 92 99
LITTLE SNAKE RIVER
Battle Mountain 7440 1.7 1.0 170* -M 3.9 *
Divide Peak 8880 2.9 3.7 78 5.5 5.7 96
Elk River 8700 2.5 2.2 114 3.7 4.8 77
Little Snake River 8915 3.8 3.1 123 10.1 7.2 140
Old Battle 10000 6.6 6.2 106 8.9 8.3 107
Sage Creek Basin 7850 1.9 1.8 106 4.4 3.8 116
Sandstone RS 8150 2.5 1.3 192* 4.1 4.5 91
Whiskey Park 8950 4.6 3.9 118 8.3 6.1 136
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Basin Index (%) 114 111
UPPER GREEN RIVER
Big Sandy Opening 9080 1.9 3.2 59 3.3 3.4 97
Blind Bull Sum 8650 2.9 4.0 72 3.7 4.5 82
East Rim Divide 7930 1.2 1.5 80 2.6 2.8 93
Elkhart Park G.S. 9400 2.2 2.7 81 3.7 3.5 106
Gros Ventre Summit 8750 1.5 3.1 48 2.5 3.5 71
Gunsight Pass 9820 1.9 2.7 70 4.2 3.6 117
Kendall R.S. 7740 1.2 2.0 60 2.6 3.4 76
Loomis Park 8240 2.3 2.3 100 3.9 3.9 100
New Fork Lake 8340 1.5 1.8 83 2.4 2.9 83
Pocket Creek 9360 3.4 -M * 4.4 -M *
Snyder Basin 8060 1.8 2.0 90 3.6 3.2 112
Spring Creek Divide 9000 3.4 4.0 85 5.3 5.3 100
Triple Peak 8500 4.1 4.1 100 6.1 5.5 111
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Basin Index (%) 78 96
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 2.8 -M *
Buck Pasture 9632 1.9 -M * 5.1 -M *
EF Blacks Fork GS 9360 1.4 -M * 3.8 -M *
Hams Fork 7840 1.0 1.7 59 3.0 2.8 107
Hewinta 9500 .5 1.4 36 3.3 3.9 85
Hickerson Park 9122 1.4 1.3 108 4.2 3.4 124
Hole-in-Rock 9168 .6 1.3 46 3.5 3.2 109
Indian Creek 9425 2.4 4.8 50 3.4 4.8 71
Kelley R.S. 8180 1.9 2.4 79 3.0 4.1 73
Spirit Lk 10235 2.9 -M * 5.4 -M *
Steel Creek Park 10158 2.2 3.3 67 4.0 4.4 91
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Basin Index (%) 62 92
UPPER BEAR RIVER
Bear River RS 8777 .4 -M * 3.5 -M *
Bug Lake 7987 .9 2.7 33 4.8 4.6 104
Burts Miller Ranch 8000 1.9 -M * 2.2 -M *
Chalk Creek #1 9171 1.4 4.0 35 6.7 6.3 106
Hayden Fork 9130 1.0 2.3 43 5.4 5.2 104
Kelley R.S. 8180 1.9 2.4 79 3.0 4.1 73
Lily Lake 9133 .9 2.3 39 3.8 4.6 83
Monte Cristo 8932 1.4 3.8 37 4.4 5.9 75
Salt River Summit 7640 1.2 1.4 86 3.4 3.6 94
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Basin Index (%) 46 92
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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.
