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 MONDAY: APRIL 22 , 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 17.1 11.5 149 24.0 21.9 110
Black Bear 8170 43.8 36.9 119 48.5 40.2 121
Blind Bull Sum 8650 25.8 24.2 107 20.8 20.4 102
Cottonwood Creek 7670 21.4 18.1 118 28.9 26.1 111
East Rim Divide 7930 7.9 9.4 84 13.0 12.3 106
Grand Targhee 9260 47.2 42.5 111 36.8 32.9 112
Granite Creek 6770 16.7 10.3 162 22.8 20.4 112
Grassy Lake 7265 34.5 30.8 112 41.5 37.7 110
Gros Ventre Summit 8750 9.4 13.0 72 13.5 13.8 98
Gunsight Pass 9820 15.1 13.7 110 17.4 15.0 116
Lewis Lake Divide 7850 39.2 30.6 128 42.7 37.1 115
Phillips Bench 8200 31.6 25.3 125 35.1 29.4 119
Salt River Summit 7640 13.1 9.2 142 18.5 17.5 106
Snake River Station 6920 16.4 11.1 148 27.9 23.7 118
Spring Creek Divide 9000 24.8 23.6 105 25.8 25.0 103
Thumb Divide 7980 18.9 14.4 131 21.0 19.8 106
Togwotee Pass 9580 25.8 24.2 107 27.3 25.9 105
Two Ocean Plateau 9240 34.4 28.5 121 28.8 28.8 100
Willow Creek 8080 33.4 26.6 126 39.1 35.6 110
Younts Peak 8350 -M 15.2 * -M 16.8 *
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Basin Index (%) 118 110
MADISON-GALLATIN
Black Bear 8170 43.8 36.9 119 48.5 40.2 121
Canyon 7870 14.0 12.1 116 18.1 17.2 105
Madison Plateau 7750 32.0 22.9 140 31.0 27.7 112
West Yellowstone 6700 7.6 6.5 117 18.8 15.2 124
Whiskey Creek 6800 18.7 15.4 121 23.7 21.4 111
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Basin Index (%) 124 115
YELLOWSTONE
Beartooth Lake 9360 23.7 23.6 100 22.1 20.9 106
Burnt Mtn 5880 4.4 .0 * 16.0 14.5 110
Canyon 7870 14.0 12.1 116 18.1 17.2 105
Cole Creek 7850 18.4 16.4 112 -M 14.8 *
Evening Star 9200 28.4 24.6 115 32.1 29.0 111
Fisher Creek 9100 36.5 32.8 111 39.2 33.7 116
Northeast Entrance 7350 7.2 6.0 120 15.9 13.1 121
Parker Peak 9400 26.9 21.2 127 26.9 18.9 142
Sylvan Lake 8420 22.0 20.4 108 30.1 23.8 126
Thumb Divide 7980 18.9 14.4 131 21.0 19.8 106
Two Ocean Plateau 9240 34.4 28.5 121 28.8 28.8 100
White Mill 8700 27.1 23.7 114 23.2 25.1 92
Wolverine 7650 7.8 6.6 118 14.2 13.0 109
Younts Peak 8350 -M 15.2 * -M 16.8 *
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Basin Index (%) 117 112
WIND RIVER
Burroughs Creek 8750 11.4 -M * 15.2 -M *
Castle Creek 8400 1.4 -M * 7.5 -M *
Cold Springs 9630 6.4 4.1 156 9.2 11.1 83
Deer Park 9700 17.5 16.3 107 20.3 21.8 93
Hobbs Park 10100 17.2 15.1 114 14.6 15.1 97
Kirwin 9550 11.2 10.0 112 12.3 12.7 97
Little Warm 9370 10.1 10.0 101 10.3 14.0 74
Owl Creek 8975 2.9 3.5 83 8.1 7.0 116
South Pass 9040 15.4 15.4 100 13.9 18.8 74
St. Lawrence Alt 8620 -M 5.1 * -M 10.1 *
Togwotee Pass 9580 25.8 24.2 107 27.3 25.9 105
Townsend Creek 8700 10.5 9.1 115 12.9 13.5 96
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Basin Index (%) 109 92
BIGHORN BASIN
Bald Mtn. 9380 17.1 20.0 86 13.5 18.4 73
Bear Trap Meadow 8200 2.3 2.7 85 7.4 9.6 77
Bone Springs Div 9350 13.7 16.2 85 12.6 17.0 74
Grave Springs 8550 8.0 9.4 85 10.0 11.9 84
Kirwin 9550 11.2 10.0 112 12.3 12.7 97
Marquette 8760 7.7 -M * 10.4 -M *
Middle Powder 7760 7.2 12.4 58 9.3 13.0 72
Owl Creek 8975 2.9 3.5 83 8.1 7.0 116
Powder River Pass 9480 9.4 10.2 92 -M 13.9 *
Shell Creek 9580 13.7 15.6 88 11.5 15.0 77
Timber Creek 7950 1.7 4.4 39 7.7 8.6 90
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Basin Index (%) 84 82
SHOSHONE RIVER
Blackwater 9780 27.0 24.0 112 27.5 22.0 125
Evening Star 9200 28.4 24.6 115 32.1 29.0 111
Marquette 8760 7.7 -M * 10.4 -M *
Sylvan Lake 8420 22.0 20.4 108 30.1 23.8 126
Sylvan Road 7120 6.5 9.2 71 17.6 17.8 99
Younts Peak 8350 -M 15.2 * -M 16.8 *
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Basin Index (%) 107 116
POWDER RIVER
Bear Trap Meadow 8200 2.3 2.7 85 7.4 9.6 77
Cloud Peak Reservoir 9860 12.2 16.0 76 11.9 15.2 78
Grave Springs 8550 8.0 9.4 85 10.0 11.9 84
Hansen Sawmill 8360 5.0 4.5 111 8.8 9.8 90
Middle Powder 7760 7.2 12.4 58 9.3 13.0 72
Powder River Pass 9480 9.4 10.2 92 -M 13.9 *
Soldier Park 8720 2.2 -M * 7.7 -M *
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Basin Index (%) 80 80
TONGUE RIVER
Big Goose 7990 7.8 9.2 85 10.9 12.9 84
Bone Springs Div 9350 13.7 16.2 85 12.6 17.0 74
Burgess Junction 7880 8.3 12.7 65 9.1 13.7 66
Dome Lake 8880 7.0 11.8 59 -M 15.1 *
Little Goose 8870 9.0 -M * 8.7 -M *
Sucker Creek 8880 10.3 12.7 81 -M 16.0 *
Tie Creek 6870 2.3 4.1 56 11.5 13.1 88
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Basin Index (%) 74 78
BELLE FOURCHE
Blind Park 6890 -M 3.9 * 8.3 13.3 62
Cole Canyon 5910 2.2 1.6 138 13.3 10.6 125
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Basin Index (%) 138 90
CHEYENNE RIVER BASIN
Blind Park 6890 -M 3.9 * 8.3 13.3 62
North Rapid Creek 6130 1.3 3.9 33 8.1 11.3 72
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Basin Index (%) 33 67
UPPER N. PLATTE
Arapaho Ridge 10960 26.8 21.4 125 27.4 24.5 112
Blackhall Mtn 9820 34.0 -M * 35.4 -M *
Columbine 9160 23.7 20.6 115 30.1 27.2 111
Divide Peak 8880 19.3 18.4 105 24.8 23.0 108
Joe Wright 10120 22.2 22.5 99 31.3 28.1 111
Laprele Creek 8375 10.4 7.7 135 15.4 13.9 111
Med Bow 10500 41.4 -M * 37.2 -M *
Never Summer 10280 22.9 20.8 110 20.2 -M *
North French Creek 10130 31.0 32.1 97 32.1 28.9 111
Old Battle 10000 38.2 33.2 115 38.5 37.4 103
Rawah 9020 9.9 8.2 121 18.3 15.7 117
Sage Creek Basin 7850 13.8 4.9 282 17.4 15.3 114
Sand Lake 10050 -M 30.6 * -M 27.1 *
South Brush Creek 8440 6.1 9.7 63 13.1 16.7 78
Tower 10500 50.6 48.5 104 48.9 42.5 115
Webber Springs 9250 24.8 21.8 114 32.7 28.6 114
Whiskey Park 8950 29.5 25.7 115 34.0 29.9 114
Willow Creek Pass 9540 17.0 13.4 127 18.5 14.6 127
Zirkel 9340 30.8 22.6 136 39.6 29.9 132
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Basin Index (%) 114 112
SWEETWATER
Deer Park 9700 17.5 16.3 107 20.3 21.8 93
Larsen Creek 9000 8.2 10.1 81 15.4 -M *
South Pass 9040 15.4 15.4 100 13.9 18.8 74
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Basin Index (%) 98 84
LOWER N. PLATTE
Casper Mtn. 7900 14.1 14.3 99 13.7 16.8 82
Laprele Creek 8375 10.4 7.7 135 15.4 13.9 111
Reno Hill 8400 16.3 14.0 116 18.9 17.4 109
Windy Peak 7900 7.6 6.4 119 12.5 11.8 106
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Basin Index (%) 114 101
LARAMIE RIVER
Brooklyn Lake 10240 25.2 22.4 112 27.8 23.1 120
Cinnabar Park 9574 20.5 19.9 103 25.4 25.7 99
Crow Creek 8330 1.6 .4 400* 11.9 12.1 98
Deadman Hill 10220 22.7 17.4 130 21.2 19.2 110
Rawah 9020 9.9 8.2 121 18.3 15.7 117
Roach 9700 16.4 16.6 99 22.9 20.9 110
Windy Peak 7900 7.6 6.4 119 12.5 11.8 106
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Basin Index (%) 114 109
S. PLATTE
Black Mountain 8920 11.8 -M * 15.1 -M *
Crow Creek 8330 1.6 .4 400* 11.9 12.1 98
Deadman Hill 10220 22.7 17.4 130 21.2 19.2 110
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Basin Index (%) 137* 106
LITTLE SNAKE RIVER
Battle Mountain 7440 5.6 3.5 160 17.2 16.2 106
Divide Peak 8880 19.3 18.4 105 24.8 23.0 108
Elk River 8700 15.3 15.0 102 20.7 21.5 96
Little Snake River 8915 26.5 23.8 111 39.3 31.2 126
Old Battle 10000 38.2 33.2 115 38.5 37.4 103
Sage Creek Basin 7850 13.8 4.9 282 17.4 15.3 114
Sandstone RS 8150 10.6 9.8 108 19.2 19.7 97
Whiskey Park 8950 29.5 25.7 115 34.0 29.9 114
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Basin Index (%) 118 109
UPPER GREEN RIVER
Big Sandy Opening 9080 14.4 12.4 116 16.2 14.3 113
Blind Bull Sum 8650 25.8 24.2 107 20.8 20.4 102
East Rim Divide 7930 7.9 9.4 84 13.0 12.3 106
Elkhart Park G.S. 9400 14.0 11.9 118 15.3 14.2 108
Gros Ventre Summit 8750 9.4 13.0 72 13.5 13.8 98
Gunsight Pass 9820 15.1 13.7 110 17.4 15.0 116
Indian Creek 9425 24.1 23.5 103 20.0 23.8 84
Kendall R.S. 7740 8.4 7.7 109 12.7 14.8 86
Loomis Park 8240 14.8 12.5 118 18.4 18.1 102
New Fork Lake 8340 8.9 8.3 107 10.6 11.4 93
Pocket Creek 9360 15.8 -M * 16.7 -M *
Snider Basin 8060 8.3 10.5 79 14.4 14.9 97
Spring Creek Divide 9000 24.8 23.6 105 25.8 25.0 103
Triple Peak 8500 23.8 19.2 124 27.9 26.6 105
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Basin Index (%) 105 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.4 -M * 14.7 -M *
Buck Pasture 9632 16.3 -M * 21.8 -M *
EF Blacks Fork GS 9360 11.6 -M * 13.3 -M *
Hams Fork 7840 6.9 6.0 115 12.6 12.2 103
Hewinta 9500 11.6 7.6 153 16.9 15.2 111
Hickerson Park 9122 9.0 5.2 173 13.4 11.2 120
Hole-in-Rock 9168 6.3 5.6 112 12.6 10.7 118
Indian Creek 9425 24.1 23.5 103 20.0 23.8 84
Kelley R.S. 8180 14.5 12.2 119 17.8 19.1 93
Spirit Lk 10235 17.1 -M * 19.0 -M *
Steel Creek Park 10158 15.3 16.3 94 21.2 18.0 118
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Basin Index (%) 115 104
UPPER BEAR RIVER
Bear River RS 8777 8.7 -M * 17.0 -M *
Bug Lake 7987 23.1 16.6 139 26.3 20.6 128
Burts Miller Ranch 8000 2.5 -M * 9.9 -M *
Chalk Creek #1 9171 28.1 24.5 115 32.6 27.1 120
Hayden Fork 9130 14.6 11.2 130 25.5 22.6 113
Kelley R.S. 8180 14.5 12.2 119 17.8 19.1 93
Lily Lake 9133 13.8 10.2 135 18.2 18.5 98
Monte Cristo 8932 37.0 27.3 136 35.2 27.7 127
Salt River Summit 7640 13.1 9.2 142 18.5 17.5 106
Spring Creek Divide 9000 24.8 23.6 105 25.8 25.0 103
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Basin Index (%) 125 112
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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.