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: MAY 11 , 2018
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 5.2 3.9 133 25.7 23.7 108
Black Bear 8170 45.4 36.8 123 46.9 43.2 109
Blind Bull Sum 8650 -M 22.4 * 23.2 22.3 104
Cottonwood Creek 7670 9.7 12.5 78 31.3 29.0 108
East Rim Divide 7930 .0 5.7 0 14.5 13.6 107
Grand Targhee 9260 50.1 46.3 108 39.5 36.1 109
Granite Creek 6770 2.9 4.7 62 24.8 22.2 112
Grassy Lake 7265 20.0 25.3 79 41.0 40.7 101
Gros Ventre Summit 8750 9.3 9.5 98 17.5 15.5 113
Gunsight Pass 9820 13.2 12.2 108 19.8 17.1 116
Lewis Lake Divide 7850 37.1 29.0 128 45.2 39.9 113
Phillips Bench 8200 24.0 23.0 104 33.2 32.0 104
Salt River Summit 7640 .0 3.9 0 15.0 19.2 78
Snake River Station 6920 .0 1.8 0 27.4 25.7 107
Spring Creek Divide 9000 22.1 23.5 94 28.2 27.2 104
Thumb Divide 7980 6.9 7.9 87 22.4 21.9 102
Togwotee Pass 9580 30.7 25.4 121 38.6 28.7 134
Two Ocean Plateau 9240 37.4 29.5 127 34.8 31.7 110
Willow Creek 8080 21.9 20.8 105 43.0 39.4 109
Younts Peak 8350 -M 15.3 * -M 18.7 *
----- -----
Basin Index (%) 104 108
MADISON-GALLATIN
Black Bear 8170 45.4 36.8 123 46.9 43.2 109
Canyon 7870 10.5 7.1 148 22.0 19.0 116
Madison Plateau 7750 24.3 19.6 124 32.0 30.1 106
West Yellowstone 6700 .0 .0 * 20.2 16.7 121
Whiskey Creek 6800 11.8 10.3 115 23.4 23.2 101
----- -----
Basin Index (%) 125 109
YELLOWSTONE
Beartooth Lake 9360 37.1 23.0 161 39.5 23.2 170
Burnt Mtn 5880 .1 .0 * 18.6 17.8 104
Canyon 7870 10.5 7.1 148 22.0 19.0 116
Cole Creek 7850 13.0 17.2 76 15.3 18.3 84
Evening Star 9200 38.4 25.5 151 48.9 32.0 153
Fisher Creek 9100 -M 34.4 * 52.5 36.8 143
Northeast Entrance 7350 .1 .8 12* 20.8 14.7 141
Parker Peak 9400 33.0 22.1 149 33.8 21.3 159
Sylvan Lake 8420 19.0 18.0 106 32.1 26.5 121
Thumb Divide 7980 6.9 7.9 87 22.4 21.9 102
Two Ocean Plateau 9240 37.4 29.5 127 34.8 31.7 110
White Mill 8700 39.9 24.8 161 35.8 27.7 129
Wolverine 7650 6.9 .0 * 23.9 14.7 163
----- -----
Basin Index (%) 138 131
WIND RIVER
Burroughs Creek 8750 5.2 -M * 20.8 -M *
Castle Creek 8400 .0 -M * 11.9 -M *
Cold Springs 9630 .0 1.2 0 11.7 13.5 87
Deer Park 9700 8.3 14.4 58 18.9 24.9 76
Hobbs Park 10100 13.7 15.8 87 17.4 18.0 97
Kirwin 9550 14.8 10.9 136 20.8 15.0 139
Little Warm 9370 9.1 6.6 138 19.7 16.4 120
Owl Creek 8975 -M .5 * 8.8 8.8 100
South Pass 9040 4.7 11.4 41 11.3 21.5 53
St. Lawrence Alt 8620 .0 .8 0 9.7 12.6 77
Togwotee Pass 9580 30.7 25.4 121 38.6 28.7 134
Townsend Creek 8700 .0 3.4 0 12.1 16.0 76
----- -----
Basin Index (%) 90 96
BIGHORN BASIN
Bald Mtn. 9380 21.2 20.7 102 20.0 21.2 94
Bear Trap Meadow 8200 .0 .0 * 12.4 11.8 105
Bone Springs Div 9350 18.4 16.6 111 18.8 19.9 94
Grave Springs 8550 2.1 7.5 28 6.8 14.4 47
Kirwin 9550 14.8 10.9 136 20.8 15.0 139
Marquette 8760 1.6 -M * 13.4 -M *
Middle Powder 7760 1.5 10.5 14 8.7 15.5 56
Owl Creek 8975 -M .5 * 8.8 8.8 100
Powder River Pass 9480 10.7 9.0 119 18.3 16.4 112
Shell Creek 9580 20.0 16.8 119 19.1 17.7 108
Timber Creek 7950 .0 1.3 0 -M 11.2 *
----- -----
Basin Index (%) 95 95
SHOSHONE RIVER
Blackwater 9780 31.5 24.6 128 36.4 24.7 147
Evening Star 9200 38.4 25.5 151 48.9 32.0 153
Marquette 8760 1.6 -M * 13.4 -M *
Sylvan Road 7120 .1 1.2 8 25.1 19.4 129
Younts Peak 8350 -M 15.3 * -M 18.7 *
----- -----
Basin Index (%) 136 145
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 12.4 11.8 105
Cloud Peak Reservoir 9860 13.5 16.8 80 18.5 18.4 101
Grave Springs 8550 2.1 7.5 28 6.8 14.4 47
Hansen Sawmill 8360 .5 1.0 50 13.4 12.0 112
Middle Powder 7760 1.5 10.5 14 8.7 15.5 56
Powder River Pass 9480 10.7 9.0 119 18.3 16.4 112
Soldier Park 8720 .4 -M * 13.2 -M *
----- -----
Basin Index (%) 63 88
TONGUE RIVER
Big Goose 7990 4.1 10.3 40 12.1 16.0 76
Bone Springs Div 9350 18.4 16.6 111 18.8 19.9 94
Burgess Junction 7880 7.7 11.4 68 11.6 16.2 72
Dome Lake 8880 10.3 11.1 93 16.8 18.1 93
Little Goose 8870 5.4 -M * 16.0 -M *
Sucker Creek 8880 5.5 12.7 43 12.9 19.2 67
Tie Creek 6870 .2 1.2 17 12.3 16.2 76
----- -----
Basin Index (%) 73 80
BELLE FOURCHE
Cole Canyon 5910 .1 .0 * 13.0 13.8 94
----- -----
Basin Index (%) * 94
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 14.2 15.7 90
North Rapid Creek 6130 .0 .0 * 12.2 13.8 88
----- -----
Basin Index (%) * 89
UPPER N. PLATTE
Arapaho Ridge 10960 18.2 22.3 82 25.5 27.6 92
Blackhall Mtn 9820 20.3 -M * 30.6 -M *
Columbine 9160 7.7 11.9 65 29.7 29.7 100
Divide Peak 8880 .0 13.7 0 20.4 25.6 80
Joe Wright 10120 18.9 23.2 81 35.8 31.5 114
Laprele Creek 8375 .2 2.0 10 10.4 16.2 64
Med Bow 10500 40.0 -M * 38.9 -M *
North French Creek 10130 23.7 32.7 72 31.9 32.5 98
Never Summer 10280 20.5 22.2 92 20.7 -M *
Old Battle 10000 24.5 36.9 66 27.6 40.9 67
Rawah 9020 .3 2.4 12 18.4 18.3 101
Sage Creek Basin 7850 -M .0 * 11.7 16.9 69
Sand Lake 10050 26.2 31.7 83 27.1 30.7 88
South Brush Creek 8440 .0 4.4 0 14.1 19.1 74
Tower 10500 38.5 51.2 75 42.7 46.6 92
Webber Springs 9250 7.8 19.0 41 24.4 31.2 78
Willow Creek Pass 9540 12.0 13.0 92 17.7 16.5 107
Zirkel 9340 6.2 19.3 32 35.1 32.8 107
----- -----
Basin Index (%) 67 90
SWEETWATER
Deer Park 9700 8.3 14.4 58 18.9 24.9 76
Larsen Creek 9000 .1 6.2 2 13.2 -M *
South Pass 9040 4.7 11.4 41 11.3 21.5 53
----- -----
Basin Index (%) 41 65
LOWER N. PLATTE
Casper Mtn. 7900 .0 11.1 0 9.3 19.6 47
Laprele Creek 8375 .2 2.0 10 10.4 16.2 64
Reno Hill 8400 1.4 10.0 14 14.4 20.4 71
Windy Peak 7900 .2 .0 * 10.7 13.9 77
----- -----
Basin Index (%) 8 64
LARAMIE RIVER
Brooklyn Lake 10240 17.0 21.1 81 29.2 26.1 112
Cinnabar Park 9574 12.9 17.0 76 27.8 28.4 98
Crow Creek 8330 .0 .0 * 13.7 14.4 95
Deadman Hill 10220 17.6 18.5 95 23.7 21.8 109
Rawah 9020 .3 2.4 12 18.4 18.3 101
Roach 9700 8.6 15.5 55 20.8 23.4 89
----- -----
Basin Index (%) 76 101
S. PLATTE
Black Mountain 8920 .7 -M * 16.4 -M *
Crow Creek 8330 .0 .0 * 13.7 14.4 95
Deadman Hill 10220 17.6 18.5 95 23.7 21.8 109
----- -----
Basin Index (%) 95* 103
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 13.3 18.0 74
Divide Peak 8880 .0 13.7 0 20.4 25.6 80
Elk River 8700 .0 7.0 0 19.4 23.8 82
Little Snake River 8915 7.5 20.1 37 31.2 34.4 91
Old Battle 10000 24.5 36.9 66 27.6 40.9 67
Sage Creek Basin 7850 -M .0 * 11.7 16.9 69
Sandstone RS 8150 -M 1.3 * 11.9 21.9 54
Whiskey Park 8950 12.6 26.5 48 29.2 33.0 88
----- -----
Basin Index (%) 43 77
UPPER GREEN RIVER
Big Sandy Opening 9080 3.9 8.6 45 15.0 16.2 93
Blind Bull Sum 8650 -M 22.4 * 23.2 22.3 104
East Rim Divide 7930 .0 5.7 0 14.5 13.6 107
Elkhart Park G.S. 9400 4.4 9.5 46 13.7 16.0 86
Gros Ventre Summit 8750 9.3 9.5 98 17.5 15.5 113
Gunsight Pass 9820 13.2 12.2 108 19.8 17.1 116
Kendall R.S. 7740 .1 .0 * 17.7 16.2 109
Loomis Park 8240 6.1 7.0 87 21.1 19.9 106
New Fork Lake 8340 .0 2.4 0 13.7 12.9 106
Pocket Creek 9360 3.8 -M * 10.9 -M *
Snider Basin 8060 .0 7.2 0 16.2 16.3 99
Spring Creek Divide 9000 22.1 23.5 94 28.2 27.2 104
Triple Peak 8500 18.9 14.5 130 36.3 29.2 124
----- -----
Basin Index (%) 78 107
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 -M * 11.3 -M *
Buck Pasture 9632 1.9 -M * 16.8 -M *
EF Blacks Fork GS 9360 -M -M * 9.2 -M *
Hams Fork 7840 .0 .2 0* 12.1 13.9 87
Hewinta 9500 .0 1.5 0 14.1 17.2 82
Hickerson Park 9122 .5 .0 * 10.6 12.9 82
Hole-in-Rock 9168 .0 .0 * 11.5 12.4 93
Indian Creek 9425 13.8 21.1 65 18.8 26.2 72
Kelley R.S. 8180 .8 8.1 10 17.0 21.2 80
Spirit Lk 10235 2.7 -M * 15.1 -M *
Steel Creek Park 10158 12.8 17.6 73 17.9 20.3 88
----- -----
Basin Index (%) 58* 82
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 12.1 -M *
Bug Lake 7987 .0 12.0 0 18.7 22.7 82
Burts Miller Ranch 8000 .2 -M * 6.9 -M *
Chalk Creek #1 9171 .4 21.2 2 18.6 29.9 62
Hayden Fork 9130 .2 5.4 4 18.8 25.0 75
Kelley R.S. 8180 .8 8.1 10 17.0 21.2 80
Lily Lake 9133 .0 4.5 0 13.3 20.7 64
Monte Cristo 8932 11.6 21.0 55 25.4 30.8 82
Salt River Summit 7640 .0 3.9 0 15.0 19.2 78
----- -----
Basin Index (%) 17 75
-----------------------------------------------------------------------------
-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.
----------------------------------------------------------------------------
-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.
