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 TUESDAY: MARCH 27 , 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 17.9 14.7 122 19.8 19.7 101
Black Bear 8170 -M 34.6 * 39.6 35.6 111
Blind Bull Sum 8650 31.2 21.3 146 18.7 18.3 102
Cottonwood Creek 7670 21.0 20.6 102 24.0 23.0 104
East Rim Divide 7930 11.6 9.8 118 11.5 11.0 105
Grand Targhee 9260 44.8 34.6 129 28.2 28.3 100
Granite Creek 6770 17.3 14.8 117 20.1 18.7 107
Grassy Lake 7265 30.9 30.8 100 33.8 33.9 100
Gros Ventre Summit 8750 14.4 12.2 118 13.9 11.9 117
Gunsight Pass 9820 15.5 12.9 120 15.0 12.7 118
Lewis Lake Divide 7850 37.3 29.0 129 -M 33.2 *
Phillips Bench 8200 26.4 23.4 113 26.4 26.4 100
Salt River Summit 7640 10.9 12.5 87 12.3 15.6 79
Snake River Station 6920 18.3 15.8 116 22.6 21.1 107
Spring Creek Divide 9000 25.7 22.2 116 23.6 22.3 106
Thumb Divide 7980 18.3 15.1 121 -M 17.2 *
Togwotee Pass 9580 30.3 21.3 142 30.5 22.6 135
Two Ocean Plateau 9240 35.7 25.0 143 28.1 25.4 111
Willow Creek 8080 32.3 26.2 123 33.5 31.2 107
Younts Peak 8350 -M 13.8 * -M 14.7 *
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Basin Index (%) 121 106
MADISON-GALLATIN
Black Bear 8170 -M 34.6 * 39.6 35.6 111
Canyon 7870 16.5 12.1 136 18.8 15.0 125
Madison Plateau 7750 26.9 20.8 129 26.4 24.5 108
West Yellowstone 6700 13.4 10.1 133 16.8 13.1 128
Whiskey Creek 6800 16.3 14.6 112 18.8 18.8 100
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Basin Index (%) 127 113
YELLOWSTONE
Beartooth Lake 9360 36.5 20.4 179 33.0 18.4 179
Burnt Mtn 5880 6.7 4.7 143 13.0 11.4 114
Canyon 7870 16.5 12.1 136 18.8 15.0 125
Cole Creek 7850 13.0 12.8 102 -M 11.4 *
Evening Star 9200 37.8 23.5 161 40.9 25.4 161
Fisher Creek 9100 49.6 28.9 172 43.9 29.6 148
Northeast Entrance 7350 13.5 9.7 139 17.2 11.4 151
Parker Peak 9400 31.2 18.3 170 27.3 16.3 167
Sylvan Lake 8420 24.2 18.8 129 25.4 20.7 123
Thumb Divide 7980 18.3 15.1 121 -M 17.2 *
Two Ocean Plateau 9240 35.7 25.0 143 28.1 25.4 111
White Mill 8700 38.7 21.1 183 29.9 22.0 136
Wolverine 7650 19.9 8.9 224 19.3 11.3 171
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Basin Index (%) 156 143
WIND RIVER
Burroughs Creek 8750 15.7 -M * 16.8 -M *
Castle Creek 8400 7.9 -M * 9.2 -M *
Cold Springs 9630 9.5 6.9 138 9.3 9.0 103
Deer Park 9700 12.1 14.2 85 14.7 17.9 82
Hobbs Park 10100 16.4 12.8 128 14.0 11.8 119
Kirwin 9550 18.8 8.9 211 16.9 10.5 161
Little Warm 9370 15.0 9.9 152 15.6 11.8 132
Owl Creek 8975 4.0 4.8 83 5.8 5.4 107
South Pass 9040 11.4 14.4 79 -M 16.0 *
St. Lawrence Alt 8620 3.0 6.6 45 8.2 8.0 102
Togwotee Pass 9580 30.3 21.3 142 30.5 22.6 135
Townsend Creek 8700 6.6 8.7 76 8.3 10.6 78
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Basin Index (%) 117 115
BIGHORN BASIN
Bald Mtn. 9380 19.6 17.3 113 13.9 15.5 90
Bear Trap Meadow 8200 -M 5.1 * 10.2 7.6 134
Bone Springs Div 9350 17.8 14.7 121 13.6 14.1 96
Grave Springs 8550 6.6 8.4 79 -M 9.4 *
Kirwin 9550 18.8 8.9 211 16.9 10.5 161
Marquette 8760 5.4 -M * 9.2 -M *
Middle Powder 7760 8.6 10.6 81 -M 10.6 *
Owl Creek 8975 4.0 4.8 83 5.8 5.4 107
Powder River Pass 9480 15.8 9.6 165 14.8 11.4 130
Shell Creek 9580 19.8 13.7 145 15.0 12.5 120
Timber Creek 7950 3.3 4.3 77 -M 6.5 *
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Basin Index (%) 124 117
SHOSHONE RIVER
Blackwater 9780 32.3 21.4 151 30.1 18.9 159
Evening Star 9200 37.8 23.5 161 40.9 25.4 161
Marquette 8760 5.4 -M * 9.2 -M *
Sylvan Road 7120 13.8 10.9 127 20.2 15.7 129
Younts Peak 8350 -M 13.8 * -M 14.7 *
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Basin Index (%) 150 152
POWDER RIVER
Bear Trap Meadow 8200 -M 5.1 * 10.2 7.6 134
Cloud Peak Reservoir 9860 14.6 13.5 108 13.0 11.9 109
Grave Springs 8550 6.6 8.4 79 -M 9.4 *
Hansen Sawmill 8360 8.2 6.1 134 9.5 7.7 123
Middle Powder 7760 8.6 10.6 81 -M 10.6 *
Powder River Pass 9480 15.8 9.6 165 14.8 11.4 130
Soldier Park 8720 6.5 -M * 9.2 -M *
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Basin Index (%) 112 123
TONGUE RIVER
Big Goose 7990 7.4 8.3 89 7.6 9.8 78
Bone Springs Div 9350 17.8 14.7 121 13.6 14.1 96
Burgess Junction 7880 8.8 10.5 84 7.2 11.1 65
Dome Lake 8880 13.9 11.0 126 11.1 12.2 91
Little Goose 8870 9.1 -M * 11.0 -M *
Sucker Creek 8880 9.8 11.1 88 7.4 12.9 57
Tie Creek 6870 4.0 5.3 75 8.0 10.2 78
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Basin Index (%) 101 78
BELLE FOURCHE
Cole Canyon 5910 7.0 5.7 123 9.3 8.3 112
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Basin Index (%) 123 112
CHEYENNE RIVER BASIN
Blind Park 6890 7.2 7.1 101 10.4 10.8 96
North Rapid Creek 6130 6.9 6.7 103 8.1 8.9 91
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Basin Index (%) 102 94
UPPER N. PLATTE
Arapaho Ridge 10960 18.7 18.9 99 18.2 20.5 89
Blackhall Mtn 9820 26.2 -M * 25.4 -M *
Columbine 9160 21.0 22.0 95 21.4 23.8 90
Divide Peak 8880 13.0 18.8 69 16.7 19.8 84
Joe Wright 10120 17.4 19.7 88 26.9 23.8 113
Laprele Creek 8375 6.0 9.4 64 7.1 11.4 62
Med Bow 10500 37.8 -M * 30.6 -M *
North French Creek 10130 25.7 27.0 95 25.0 24.8 101
Never Summer 10280 17.9 18.7 96 14.7 -M *
Old Battle 10000 23.8 28.1 85 22.8 32.5 70
Rawah 9020 10.4 10.0 104 13.9 12.9 108
Sage Creek Basin 7850 8.6 12.2 70 9.8 13.4 73
Sand Lake 10050 24.4 26.1 93 20.7 22.7 91
South Brush Creek 8440 9.4 11.8 80 11.0 14.0 79
Tower 10500 33.1 41.9 79 26.1 37.1 70
Webber Springs 9250 17.8 22.3 80 20.3 24.8 82
Willow Creek Pass 9540 12.6 11.4 111 13.4 12.2 110
Zirkel 9340 26.1 25.9 101 29.5 26.5 111
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Basin Index (%) 88 88
SWEETWATER
Deer Park 9700 12.1 14.2 85 14.7 17.9 82
Larsen Creek 9000 10.8 11.8 92 11.0 -M *
South Pass 9040 11.4 14.4 79 -M 16.0 *
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Basin Index (%) 85 82*
LOWER N. PLATTE
Casper Mtn. 7900 7.4 12.8 58 5.8 13.4 43
Laprele Creek 8375 6.0 9.4 64 7.1 11.4 62
Reno Hill 8400 9.0 12.6 71 10.2 13.8 74
Windy Peak 7900 5.8 7.7 75 7.3 9.6 76
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Basin Index (%) 66 63
LARAMIE RIVER
Brooklyn Lake 10240 23.3 18.7 125 23.1 19.3 120
Cinnabar Park 9574 20.1 19.5 103 23.1 22.4 103
Crow Creek 8330 3.6 6.9 52 10.0 9.7 103
Deadman Hill 10220 19.2 14.8 130 18.4 15.8 116
Rawah 9020 10.4 10.0 104 13.9 12.9 108
Roach 9700 12.7 14.7 86 15.8 17.6 90
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Basin Index (%) 106 107
S. PLATTE
Black Mountain 8920 9.8 -M * 12.5 -M *
Crow Creek 8330 3.6 6.9 52 10.0 9.7 103
Deadman Hill 10220 19.2 14.8 130 18.4 15.8 116
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Basin Index (%) 105 111
LITTLE SNAKE RIVER
Battle Mountain 7440 6.3 11.0 57 -M 14.0 *
Divide Peak 8880 13.0 18.8 69 16.7 19.8 84
Elk River 8700 14.3 17.8 80 15.4 18.6 83
Little Snake River 8915 20.0 21.9 91 26.0 27.5 95
Old Battle 10000 23.8 28.1 85 22.8 32.5 70
Sage Creek Basin 7850 8.6 12.2 70 9.8 13.4 73
Sandstone RS 8150 8.6 13.0 66 8.2 17.2 48
Whiskey Park 8950 22.5 24.8 91 23.8 26.0 92
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Basin Index (%) 79 79
UPPER GREEN RIVER
Big Sandy Opening 9080 12.9 12.0 108 12.7 12.3 103
Blind Bull Sum 8650 31.2 21.3 146 18.7 18.3 102
East Rim Divide 7930 11.6 9.8 118 11.5 11.0 105
Elkhart Park G.S. 9400 11.8 11.5 103 11.4 12.3 93
Gros Ventre Summit 8750 14.4 12.2 118 13.9 11.9 117
Gunsight Pass 9820 15.5 12.9 120 15.0 12.7 118
Kendall R.S. 7740 14.3 11.3 127 14.5 13.5 107
Loomis Park 8240 16.9 14.3 118 17.4 16.2 107
New Fork Lake 8340 11.5 9.9 116 -M 10.1 *
Pocket Creek 9360 8.6 -M * 8.6 -M *
Snider Basin 8060 12.6 11.5 110 14.0 13.2 106
Spring Creek Divide 9000 25.7 22.2 116 23.6 22.3 106
Triple Peak 8500 27.9 20.7 135 29.1 23.7 123
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Basin Index (%) 122 109
LOWER GREEN RIVER
Blacks Fork Jct 8869 7.3 -M * 8.6 -M *
Buck Pasture 9632 11.8 -M * 12.7 -M *
EF Blacks Fork GS 9360 10.5 -M * 5.8 -M *
Hams Fork 7840 9.3 10.6 88 9.1 10.6 86
Hewinta 9500 8.8 10.0 88 10.7 12.9 83
Hickerson Park 9122 6.7 7.0 96 7.4 9.3 80
Hole-in-Rock 9168 7.1 6.9 103 8.0 8.7 92
Indian Creek 9425 20.7 22.7 91 15.1 21.0 72
Kelley R.S. 8180 12.9 14.4 90 14.1 17.0 83
Spirit Lk 10235 10.4 -M * 11.6 -M *
Steel Creek Park 10158 13.3 14.2 94 13.2 15.0 88
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Basin Index (%) 92 82
UPPER BEAR RIVER
Bear River RS 8777 7.9 -M * 10.3 -M *
Bug Lake 7987 14.7 17.6 84 15.5 18.1 86
Burts Miller Ranch 8000 5.6 -M * 6.2 -M *
Chalk Creek #1 9171 14.7 22.4 66 15.8 23.2 68
Hayden Fork 9130 13.3 14.6 91 15.6 19.4 80
Kelley R.S. 8180 12.9 14.4 90 14.1 17.0 83
Lily Lake 9133 9.1 11.8 77 11.1 15.7 71
Monte Cristo 8932 21.4 25.3 85 20.9 24.2 86
Salt River Summit 7640 10.9 12.5 87 12.3 15.6 79
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Basin Index (%) 82 79
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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.