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 SUNDAY: MARCH 25 , 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 17.4 14.6 119 19.6 19.4 101
Black Bear 8170 38.4 33.9 113 39.3 35.3 111
Blind Bull Sum 8650 31.2 21.1 148 18.6 18.1 103
Cottonwood Creek 7670 20.8 20.5 101 23.8 22.7 105
East Rim Divide 7930 11.5 9.7 119 11.4 10.9 105
Grand Targhee 9260 44.4 33.9 131 28.1 27.7 101
Granite Creek 6770 17.0 14.8 115 20.0 18.5 108
Grassy Lake 7265 30.8 30.3 102 33.7 33.4 101
Gros Ventre Summit 8750 14.2 12.0 118 13.4 11.8 114
Gunsight Pass 9820 15.3 12.5 122 14.7 12.5 118
Lewis Lake Divide 7850 37.3 28.6 130 36.7 32.9 112
Phillips Bench 8200 26.0 23.1 113 26.1 25.9 101
Salt River Summit 7640 10.7 12.3 87 12.2 15.4 79
Snake River Station 6920 17.9 15.6 115 22.6 20.9 108
Spring Creek Divide 9000 25.9 21.9 118 23.6 22.0 107
Thumb Divide 7980 18.8 14.8 127 18.0 16.9 107
Togwotee Pass 9580 30.1 21.1 143 30.3 22.3 136
Two Ocean Plateau 9240 35.6 24.6 145 28.0 25.1 112
Willow Creek 8080 32.0 25.5 125 33.0 30.7 107
Younts Peak 8350 -M 13.7 * -M 14.5 *
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Basin Index (%) 122 107
MADISON-GALLATIN
Black Bear 8170 38.4 33.9 113 39.3 35.3 111
Canyon 7870 16.3 12.0 136 18.7 14.9 126
Madison Plateau 7750 27.3 20.6 133 26.3 24.2 109
West Yellowstone 6700 13.4 10.0 134 16.8 12.9 130
Whiskey Creek 6800 16.3 14.4 113 18.5 18.6 99
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Basin Index (%) 123 113
YELLOWSTONE
Beartooth Lake 9360 36.5 20.1 182 32.8 18.1 181
Burnt Mtn 5880 6.7 4.8 140 13.0 11.2 116
Canyon 7870 16.3 12.0 136 18.7 14.9 126
Cole Creek 7850 12.8 12.5 102 -M 11.2 *
Evening Star 9200 38.0 23.1 165 40.9 25.0 164
Fisher Creek 9100 49.5 28.6 173 43.8 29.3 149
Northeast Entrance 7350 13.4 9.5 141 17.2 11.2 154
Parker Peak 9400 31.2 18.0 173 27.2 16.1 169
Sylvan Lake 8420 24.0 18.6 129 25.3 20.4 124
Thumb Divide 7980 18.8 14.8 127 18.0 16.9 107
Two Ocean Plateau 9240 35.6 24.6 145 28.0 25.1 112
White Mill 8700 38.8 20.8 187 29.9 21.8 137
Wolverine 7650 20.0 8.9 225 19.3 11.2 172
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Basin Index (%) 158 142
WIND RIVER
Burroughs Creek 8750 15.4 -M * 16.9 -M *
Castle Creek 8400 7.9 -M * 9.1 -M *
Cold Springs 9630 9.4 6.7 140 9.2 8.8 105
Deer Park 9700 11.6 14.1 82 14.3 17.6 81
Hobbs Park 10100 16.1 12.5 129 13.5 11.5 117
Kirwin 9550 18.5 8.7 213 16.7 10.3 162
Little Warm 9370 14.7 9.7 152 15.3 11.5 133
Owl Creek 8975 3.5 4.7 74 5.4 5.2 104
South Pass 9040 10.9 14.4 76 -M 15.7 *
St. Lawrence Alt 8620 2.9 6.4 45 8.0 7.8 103
Togwotee Pass 9580 30.1 21.1 143 30.3 22.3 136
Townsend Creek 8700 6.5 8.6 76 8.2 10.4 79
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Basin Index (%) 116 115
BIGHORN BASIN
Bald Mtn. 9380 19.3 16.8 115 13.6 15.3 89
Bear Trap Meadow 8200 8.4 5.2 162 9.0 7.4 122
Bone Springs Div 9350 17.3 14.3 121 13.1 13.8 95
Grave Springs 8550 6.1 8.3 73 -M 9.3 *
Kirwin 9550 18.5 8.7 213 16.7 10.3 162
Marquette 8760 5.0 -M * 8.8 -M *
Middle Powder 7760 7.9 10.4 76 -M 10.4 *
Owl Creek 8975 3.5 4.7 74 5.4 5.2 104
Powder River Pass 9480 15.3 9.5 161 14.2 11.3 126
Shell Creek 9580 19.5 13.3 147 14.5 12.3 118
Timber Creek 7950 2.8 4.2 67 -M 6.4 *
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Basin Index (%) 124 114
SHOSHONE RIVER
Blackwater 9780 32.3 21.1 153 30.0 18.6 161
Evening Star 9200 38.0 23.1 165 40.9 25.0 164
Marquette 8760 5.0 -M * 8.8 -M *
Sylvan Road 7120 13.3 10.7 124 20.1 15.5 130
Younts Peak 8350 -M 13.7 * -M 14.5 *
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Basin Index (%) 152 154
POWDER RIVER
Bear Trap Meadow 8200 8.4 5.2 162 9.0 7.4 122
Cloud Peak Reservoir 9860 14.0 13.4 104 12.6 11.7 108
Grave Springs 8550 6.1 8.3 73 -M 9.3 *
Hansen Sawmill 8360 7.4 6.0 123 8.7 7.5 116
Middle Powder 7760 7.9 10.4 76 -M 10.4 *
Powder River Pass 9480 15.3 9.5 161 14.2 11.3 126
Soldier Park 8720 5.8 -M * 8.5 -M *
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Basin Index (%) 112 117
TONGUE RIVER
Big Goose 7990 6.8 8.1 84 7.0 9.6 73
Bone Springs Div 9350 17.3 14.3 121 13.1 13.8 95
Burgess Junction 7880 8.3 10.1 82 7.2 10.8 67
Dome Lake 8880 13.3 10.7 124 10.3 12.0 86
Little Goose 8870 8.3 -M * 10.4 -M *
Sucker Creek 8880 9.2 11.1 83 6.9 12.7 54
Tie Creek 6870 3.6 5.2 69 7.5 10.0 75
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Basin Index (%) 98 75
BELLE FOURCHE
Cole Canyon 5910 6.2 5.7 109 8.1 8.2 99
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Basin Index (%) 109 99
CHEYENNE RIVER BASIN
Blind Park 6890 6.8 7.0 97 10.1 10.7 94
North Rapid Creek 6130 6.6 6.7 99 7.6 8.8 86
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Basin Index (%) 98 91
UPPER N. PLATTE
Arapaho Ridge 10960 18.7 18.5 101 18.4 20.3 91
Blackhall Mtn 9820 26.1 -M * 25.3 -M *
Columbine 9160 21.7 22.0 99 22.0 23.5 94
Divide Peak 8880 12.9 18.3 70 16.5 19.6 84
Joe Wright 10120 17.5 19.4 90 26.7 23.5 114
Laprele Creek 8375 5.9 9.4 63 7.2 11.2 64
Med Bow 10500 37.6 -M * 30.6 -M *
North French Creek 10130 25.5 26.6 96 24.8 24.5 101
Never Summer 10280 17.8 18.5 96 14.7 -M *
Old Battle 10000 23.7 27.6 86 22.9 32.2 71
Rawah 9020 10.2 9.8 104 14.1 12.7 111
Sage Creek Basin 7850 8.6 11.9 72 9.7 13.2 73
Sand Lake 10050 24.3 25.7 95 20.6 22.4 92
South Brush Creek 8440 9.1 11.6 78 10.9 13.8 79
Tower 10500 33.2 41.3 80 26.4 36.7 72
Webber Springs 9250 17.7 21.8 81 20.3 24.5 83
Willow Creek Pass 9540 12.7 11.2 113 13.5 12.0 112
Zirkel 9340 26.1 25.6 102 29.5 26.1 113
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Basin Index (%) 89 90
SWEETWATER
Deer Park 9700 11.6 14.1 82 14.3 17.6 81
Larsen Creek 9000 10.8 11.6 93 10.9 -M *
South Pass 9040 10.9 14.4 76 -M 15.7 *
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Basin Index (%) 83 81*
LOWER N. PLATTE
Casper Mtn. 7900 7.2 12.7 57 5.9 13.3 44
Laprele Creek 8375 5.9 9.4 63 7.2 11.2 64
Reno Hill 8400 9.0 12.4 73 10.2 13.6 75
Windy Peak 7900 5.7 7.5 76 7.4 9.4 79
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Basin Index (%) 66 65
LARAMIE RIVER
Brooklyn Lake 10240 23.4 18.3 128 23.1 19.1 121
Cinnabar Park 9574 20.0 19.2 104 23.0 22.0 105
Crow Creek 8330 3.5 6.9 51 9.7 9.6 101
Deadman Hill 10220 19.2 14.4 133 18.3 15.5 118
Rawah 9020 10.2 9.8 104 14.1 12.7 111
Roach 9700 12.6 14.4 88 15.9 17.4 91
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Basin Index (%) 107 108
S. PLATTE
Black Mountain 8920 9.9 -M * 12.5 -M *
Crow Creek 8330 3.5 6.9 51 9.7 9.6 101
Deadman Hill 10220 19.2 14.4 133 18.3 15.5 118
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Basin Index (%) 107 112
LITTLE SNAKE RIVER
Battle Mountain 7440 6.3 11.2 56 9.6 13.9 69
Divide Peak 8880 12.9 18.3 70 16.5 19.6 84
Elk River 8700 13.9 17.6 79 15.2 18.4 83
Little Snake River 8915 20.1 21.6 93 26.0 27.1 96
Old Battle 10000 23.7 27.6 86 22.9 32.2 71
Sage Creek Basin 7850 8.6 11.9 72 9.7 13.2 73
Sandstone RS 8150 8.7 12.9 67 8.2 17.1 48
Whiskey Park 8950 22.7 24.6 92 23.8 25.7 93
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Basin Index (%) 80 79
UPPER GREEN RIVER
Big Sandy Opening 9080 12.7 11.9 107 12.5 12.1 103
Blind Bull Sum 8650 31.2 21.1 148 18.6 18.1 103
East Rim Divide 7930 11.5 9.7 119 11.4 10.9 105
Elkhart Park G.S. 9400 11.9 11.2 106 11.4 12.2 93
Gros Ventre Summit 8750 14.2 12.0 118 13.4 11.8 114
Gunsight Pass 9820 15.3 12.5 122 14.7 12.5 118
Kendall R.S. 7740 13.9 11.4 122 14.4 13.2 109
Loomis Park 8240 16.9 14.0 121 17.3 16.0 108
New Fork Lake 8340 11.3 9.7 116 10.6 10.0 106
Pocket Creek 9360 8.4 -M * 8.5 -M *
Snider Basin 8060 12.6 11.3 112 14.2 13.1 108
Spring Creek Divide 9000 25.9 21.9 118 23.6 22.0 107
Triple Peak 8500 27.7 20.3 136 28.8 23.4 123
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Basin Index (%) 123 109
LOWER GREEN RIVER
Blacks Fork Jct 8869 7.6 -M * 8.5 -M *
Buck Pasture 9632 11.7 -M * 12.5 -M *
EF Blacks Fork GS 9360 10.5 -M * 5.5 -M *
Hams Fork 7840 9.2 10.5 88 9.1 10.5 87
Hewinta 9500 8.8 9.9 89 10.6 12.7 83
Hickerson Park 9122 6.5 6.9 94 7.4 9.2 80
Hole-in-Rock 9168 7.1 6.9 103 7.8 8.6 91
Indian Creek 9425 20.7 22.2 93 15.1 20.7 73
Kelley R.S. 8180 13.0 14.1 92 14.1 16.7 84
Spirit Lk 10235 10.3 -M * 11.5 -M *
Steel Creek Park 10158 13.0 13.8 94 13.0 14.7 88
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Basin Index (%) 93 83
UPPER BEAR RIVER
Bear River RS 8777 8.2 -M * 10.1 -M *
Bug Lake 7987 14.6 17.3 84 15.4 17.8 87
Burts Miller Ranch 8000 5.2 -M * 6.2 -M *
Chalk Creek #1 9171 14.3 22.1 65 15.3 22.9 67
Hayden Fork 9130 12.6 14.5 87 15.5 19.1 81
Kelley R.S. 8180 13.0 14.1 92 14.1 16.7 84
Lily Lake 9133 9.0 11.6 78 10.8 15.5 70
Monte Cristo 8932 21.0 25.1 84 20.5 23.7 86
Salt River Summit 7640 10.7 12.3 87 12.2 15.4 79
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Basin Index (%) 81 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.