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 THURSDAY: APRIL 18 , 2019
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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 18.8 12.2 154 23.8 21.6 110
Black Bear 8170 47.2 36.8 128 48.0 39.5 122
Blind Bull Sum 8650 26.1 23.9 109 20.7 20.1 103
Cottonwood Creek 7670 23.1 19.1 121 28.6 25.5 112
East Rim Divide 7930 10.7 9.6 111 13.0 12.1 107
Grand Targhee 9260 48.1 41.7 115 33.9 32.3 105
Granite Creek 6770 18.1 11.4 159 22.8 20.2 113
Grassy Lake 7265 35.8 31.5 114 41.1 37.1 111
Gros Ventre Summit 8750 7.9 13.2 60 13.4 13.5 99
Gunsight Pass 9820 13.7 13.5 101 16.9 14.6 116
Lewis Lake Divide 7850 39.9 30.2 132 42.2 36.5 116
Phillips Bench 8200 32.0 25.8 124 34.8 28.9 120
Salt River Summit 7640 15.3 10.3 149 18.3 17.2 106
Snake River Station 6920 19.1 11.7 163 27.4 23.3 118
Spring Creek Divide 9000 25.0 23.5 106 25.6 24.6 104
Thumb Divide 7980 20.7 14.5 143 20.9 19.5 107
Togwotee Pass 9580 26.2 23.5 111 27.2 25.4 107
Two Ocean Plateau 9240 34.2 27.8 123 28.4 28.2 101
Willow Creek 8080 34.8 26.8 130 38.9 34.9 111
Younts Peak 8350 -M 15.0 * -M 16.4 *
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Basin Index (%) 122 111
MADISON-GALLATIN
Black Bear 8170 47.2 36.8 128 48.0 39.5 122
Canyon 7870 14.8 12.4 119 17.9 16.8 107
Madison Plateau 7750 32.5 22.8 143 30.9 27.2 114
West Yellowstone 6700 10.8 8.0 135 18.6 14.9 125
Whiskey Creek 6800 19.8 15.1 131 23.5 21.0 112
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Basin Index (%) 132 116
YELLOWSTONE
Beartooth Lake 9360 23.5 23.0 102 21.7 20.5 106
Burnt Mtn 5880 6.7 .0 * 15.0 13.9 108
Canyon 7870 14.8 12.4 119 17.9 16.8 107
Cole Creek 7850 18.5 16.0 116 -M 14.2 *
Evening Star 9200 28.6 25.0 114 31.5 28.4 111
Fisher Creek 9100 36.7 32.2 114 38.7 33.0 117
Northeast Entrance 7350 9.7 7.3 133 15.8 12.8 123
Parker Peak 9400 26.6 20.8 128 26.2 18.5 142
Sylvan Lake 8420 23.1 20.3 114 29.7 23.3 127
Thumb Divide 7980 20.7 14.5 143 20.9 19.5 107
Two Ocean Plateau 9240 34.2 27.8 123 28.4 28.2 101
White Mill 8700 27.2 23.6 115 23.0 24.7 93
Wolverine 7650 10.1 7.8 129 13.8 12.7 109
Younts Peak 8350 -M 15.0 * -M 16.4 *
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Basin Index (%) 122 112
WIND RIVER
Burroughs Creek 8750 13.3 -M * 15.1 -M *
Castle Creek 8400 3.4 -M * 7.0 -M *
Cold Springs 9630 7.9 5.1 155 8.7 10.7 81
Deer Park 9700 18.4 16.1 114 20.2 21.1 96
Hobbs Park 10100 17.4 14.8 118 14.0 14.5 97
Kirwin 9550 11.4 10.0 114 12.1 12.2 99
Little Warm 9370 10.6 10.2 104 10.2 13.7 74
Owl Creek 8975 4.4 4.4 100 7.2 6.6 109
South Pass 9040 16.3 15.7 104 13.7 18.3 75
St. Lawrence Alt 8620 -M 5.7 * -M 9.7 *
Togwotee Pass 9580 26.2 23.5 111 27.2 25.4 107
Townsend Creek 8700 11.0 9.7 113 12.7 13.0 98
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Basin Index (%) 113 93
BIGHORN BASIN
Bald Mtn. 9380 17.4 19.6 89 13.1 17.9 73
Bear Trap Meadow 8200 4.8 3.8 126 7.3 9.2 79
Bone Springs Div 9350 13.0 16.3 80 12.2 16.5 74
Grave Springs 8550 8.5 9.7 88 9.9 11.3 88
Kirwin 9550 11.4 10.0 114 12.1 12.2 99
Marquette 8760 8.1 -M * 10.0 -M *
Middle Powder 7760 8.3 12.5 66 9.2 12.5 74
Owl Creek 8975 4.4 4.4 100 7.2 6.6 109
Powder River Pass 9480 10.0 10.1 99 -M 13.5 *
Shell Creek 9580 13.7 15.3 90 11.1 14.6 76
Timber Creek 7950 3.1 5.1 61 7.1 8.2 87
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Basin Index (%) 89 82
SHOSHONE RIVER
Blackwater 9780 27.1 23.8 114 27.2 21.6 126
Evening Star 9200 28.6 25.0 114 31.5 28.4 111
Marquette 8760 8.1 -M * 10.0 -M *
Sylvan Lake 8420 23.1 20.3 114 29.7 23.3 127
Sylvan Road 7120 9.4 10.2 92 17.4 17.4 100
Younts Peak 8350 -M 15.0 * -M 16.4 *
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Basin Index (%) 111 117
POWDER RIVER
Bear Trap Meadow 8200 4.8 3.8 126 7.3 9.2 79
Cloud Peak Reservoir 9860 12.3 15.6 79 11.6 14.5 80
Grave Springs 8550 8.5 9.7 88 9.9 11.3 88
Hansen Sawmill 8360 5.8 5.2 112 8.4 9.3 90
Middle Powder 7760 8.3 12.5 66 9.2 12.5 74
Powder River Pass 9480 10.0 10.1 99 -M 13.5 *
Soldier Park 8720 3.7 -M * 7.6 -M *
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Basin Index (%) 87 82
TONGUE RIVER
Big Goose 7990 8.5 9.5 89 10.7 12.3 87
Bone Springs Div 9350 13.0 16.3 80 12.2 16.5 74
Burgess Junction 7880 9.1 12.3 74 9.0 13.2 68
Dome Lake 8880 8.0 11.9 67 8.9 14.6 61
Little Goose 8870 9.8 -M * 8.4 -M *
Sucker Creek 8880 11.1 12.7 87 10.3 15.5 66
Tie Creek 6870 3.9 4.5 87 11.2 12.6 89
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Basin Index (%) 80 74
BELLE FOURCHE
Blind Park 6890 2.1 4.4 48 8.1 12.6 64
Cole Canyon 5910 4.4 2.4 183 13.0 10.1 129
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Basin Index (%) 96 93
CHEYENNE RIVER BASIN
Blind Park 6890 2.1 4.4 48 8.1 12.6 64
North Rapid Creek 6130 3.5 4.6 76 7.7 10.5 73
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Basin Index (%) 62 68
UPPER N. PLATTE
Arapaho Ridge 10960 26.5 21.4 124 27.2 24.0 113
Blackhall Mtn 9820 34.6 -M * 35.4 -M *
Columbine 9160 26.6 21.0 127 30.0 26.6 113
Divide Peak 8880 21.8 19.3 113 24.7 22.5 110
Joe Wright 10120 23.4 22.1 106 31.2 27.4 114
Laprele Creek 8375 12.7 8.6 148 15.3 13.4 114
Med Bow 10500 40.2 -M * 36.4 -M *
Never Summer 10280 22.9 20.6 111 19.9 -M *
North French Creek 10130 30.7 32.0 96 31.6 28.1 112
Old Battle 10000 38.4 32.4 119 38.4 36.6 105
Rawah 9020 11.9 8.9 134 18.2 15.5 117
Sage Creek Basin 7850 17.2 7.1 242 17.0 15.1 113
Sand Lake 10050 31.2 30.4 103 25.8 26.4 98
South Brush Creek 8440 9.0 10.1 89 12.8 16.2 79
Tower 10500 52.3 47.7 110 48.5 41.6 117
Webber Springs 9250 26.7 22.6 118 32.8 28.1 117
Whiskey Park 8950 31.7 26.2 121 34.0 29.3 116
Willow Creek Pass 9540 16.9 12.8 132 18.4 14.2 130
Zirkel 9340 34.0 23.0 148 39.5 29.5 134
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Basin Index (%) 118 113
SWEETWATER
Deer Park 9700 18.4 16.1 114 20.2 21.1 96
Larsen Creek 9000 10.0 10.5 95 15.4 -M *
South Pass 9040 16.3 15.7 104 13.7 18.3 75
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Basin Index (%) 106 86
LOWER N. PLATTE
Casper Mtn. 7900 15.5 14.5 107 13.5 16.2 83
Laprele Creek 8375 12.7 8.6 148 15.3 13.4 114
Reno Hill 8400 17.4 14.0 124 18.6 16.8 111
Windy Peak 7900 9.4 6.9 136 12.2 11.4 107
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Basin Index (%) 125 103
LARAMIE RIVER
Brooklyn Lake 10240 25.4 22.1 115 27.0 22.4 121
Cinnabar Park 9574 20.8 20.5 101 24.6 25.2 98
Crow Creek 8330 4.0 1.7 235 11.4 11.9 96
Deadman Hill 10220 22.6 16.6 136 21.1 18.6 113
Rawah 9020 11.9 8.9 134 18.2 15.5 117
Roach 9700 17.7 16.5 107 22.8 20.3 112
Windy Peak 7900 9.4 6.9 136 12.2 11.4 107
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Basin Index (%) 120 110
S. PLATTE
Black Mountain 8920 12.3 -M * 14.4 -M *
Crow Creek 8330 4.0 1.7 235 11.4 11.9 96
Deadman Hill 10220 22.6 16.6 136 21.1 18.6 113
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Basin Index (%) 145 107
LITTLE SNAKE RIVER
Battle Mountain 7440 8.2 5.4 152 17.2 15.8 109
Divide Peak 8880 21.8 19.3 113 24.7 22.5 110
Elk River 8700 17.7 16.1 110 20.6 21.0 98
Little Snake River 8915 29.0 25.0 116 39.3 31.0 127
Old Battle 10000 38.4 32.4 119 38.4 36.6 105
Sage Creek Basin 7850 17.2 7.1 242 17.0 15.1 113
Sandstone RS 8150 13.4 10.8 124 19.2 19.2 100
Whiskey Park 8950 31.7 26.2 121 34.0 29.3 116
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Basin Index (%) 125 110
UPPER GREEN RIVER
Big Sandy Opening 9080 14.8 12.7 117 15.7 13.9 113
Blind Bull Sum 8650 26.1 23.9 109 20.7 20.1 103
East Rim Divide 7930 10.7 9.6 111 13.0 12.1 107
Elkhart Park G.S. 9400 14.2 12.0 118 14.9 13.9 107
Gros Ventre Summit 8750 7.9 13.2 60 13.4 13.5 99
Gunsight Pass 9820 13.7 13.5 101 16.9 14.6 116
Indian Creek 9425 24.9 23.3 107 19.9 23.3 85
Kendall R.S. 7740 10.2 9.0 113 12.6 14.6 86
Loomis Park 8240 16.5 13.2 125 18.3 17.8 103
New Fork Lake 8340 10.4 9.2 113 10.4 11.2 93
Pocket Creek 9360 15.9 -M * 16.3 -M *
Snider Basin 8060 10.5 11.1 95 14.3 14.6 98
Spring Creek Divide 9000 25.0 23.5 106 25.6 24.6 104
Triple Peak 8500 26.2 19.3 136 27.5 26.1 105
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Basin Index (%) 109 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.7 -M * 14.6 -M *
Buck Pasture 9632 17.2 -M * 21.6 -M *
EF Blacks Fork GS 9360 13.4 -M * 13.3 -M *
Hams Fork 7840 9.1 7.5 121 12.3 11.9 103
Hewinta 9500 13.3 8.7 153 16.9 14.8 114
Hickerson Park 9122 10.3 5.8 178 13.1 10.9 120
Hole-in-Rock 9168 7.6 6.2 123 12.1 10.4 116
Indian Creek 9425 24.9 23.3 107 19.9 23.3 85
Kelley R.S. 8180 16.0 13.1 122 17.4 18.7 93
Spirit Lk 10235 18.0 -M * 18.9 -M *
Steel Creek Park 10158 15.0 16.1 93 21.1 17.5 121
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Basin Index (%) 119 105
UPPER BEAR RIVER
Bear River RS 8777 10.8 -M * 17.0 -M *
Bug Lake 7987 24.7 18.0 137 25.5 20.1 127
Burts Miller Ranch 8000 5.4 -M * 10.0 -M *
Chalk Creek #1 9171 29.2 24.8 118 32.5 26.4 123
Hayden Fork 9130 17.0 12.6 135 25.5 22.1 115
Kelley R.S. 8180 16.0 13.1 122 17.4 18.7 93
Lily Lake 9133 15.0 11.3 133 18.2 18.1 101
Monte Cristo 8932 37.6 27.6 136 34.7 27.0 129
Salt River Summit 7640 15.3 10.3 149 18.3 17.2 106
Spring Creek Divide 9000 25.0 23.5 106 25.6 24.6 104
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Basin Index (%) 127 113
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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.