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 SATURDAY: MARCH 3 , 2018
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 15.8 13.6 116 17.3 17.4 99
Black Bear 8170 37.0 29.9 124 34.4 31.3 110
Blind Bull Sum 8650 27.0 18.2 148 16.4 16.1 102
Cottonwood Creek 7670 17.8 17.2 103 19.5 19.8 98
East Rim Divide 7930 10.0 8.3 120 9.9 9.6 103
Grand Targhee 9260 37.8 30.5 124 24.6 25.0 98
Granite Creek 6770 15.3 13.9 110 17.2 16.6 104
Grassy Lake 7265 27.0 26.4 102 30.3 29.8 102
Gros Ventre Summit 8750 10.8 10.0 108 11.2 10.2 110
Gunsight Pass 9820 12.7 10.7 119 12.5 10.9 115
Lewis Lake Divide 7850 33.0 25.3 130 -M 29.2 *
Phillips Bench 8200 20.6 19.9 104 21.6 23.0 94
Salt River Summit 7640 8.5 10.7 79 10.3 13.6 76
Snake River Station 6920 16.0 14.4 111 20.2 18.8 107
Spring Creek Divide 9000 21.3 18.8 113 20.2 19.5 104
Thumb Divide 7980 15.8 12.4 127 15.9 14.8 107
Togwotee Pass 9580 25.4 18.1 140 25.9 19.6 132
Two Ocean Plateau 9240 31.9 21.7 147 -M 21.9 *
Willow Creek 8080 26.6 22.6 118 28.9 27.1 107
Younts Peak 8350 -M 11.7 * -M 12.8 *
----- -----
Basin Index (%) 120 104
MADISON-GALLATIN
Black Bear 8170 37.0 29.9 124 34.4 31.3 110
Canyon 7870 15.0 10.7 140 16.8 13.2 127
Madison Plateau 7750 23.8 18.0 132 23.1 21.5 107
West Yellowstone 6700 12.2 9.1 134 15.1 11.7 129
Whiskey Creek 6800 14.3 12.1 118 16.4 16.5 99
----- -----
Basin Index (%) 128 112
YELLOWSTONE
Beartooth Lake 9360 34.5 17.1 202 30.4 15.9 191
Burnt Mtn 5880 6.4 4.1 156 12.4 9.6 129
Canyon 7870 15.0 10.7 140 16.8 13.2 127
Cole Creek 7850 11.7 10.2 115 7.9 9.2 86
Evening Star 9200 35.0 19.4 180 31.1 22.3 139
Fisher Creek 9100 45.3 26.0 174 39.4 25.8 153
Northeast Entrance 7350 12.7 8.3 153 15.6 10.0 156
Parker Peak 9400 28.7 16.2 177 22.8 14.2 161
Sylvan Lake 8420 20.8 16.0 130 22.3 18.1 123
Thumb Divide 7980 15.8 12.4 127 15.9 14.8 107
Two Ocean Plateau 9240 31.9 21.7 147 -M 21.9 *
White Mill 8700 36.0 18.5 195 26.7 19.2 139
Wolverine 7650 18.8 8.6 219 18.2 10.1 180
----- -----
Basin Index (%) 165 142
WIND RIVER
Burroughs Creek 8750 14.0 -M * 16.0 -M *
Castle Creek 8400 7.5 -M * 8.8 -M *
Cold Springs 9630 8.0 5.6 143 8.5 7.5 113
Deer Park 9700 9.1 10.9 83 12.0 15.4 78
Hobbs Park 10100 13.8 9.9 139 11.9 9.6 124
Kirwin 9550 16.9 7.1 238 15.2 8.9 171
Little Warm 9370 13.1 8.1 162 13.6 9.9 137
Owl Creek 8975 3.4 4.0 85 5.2 4.4 118
South Pass 9040 9.2 11.6 79 -M 13.6 *
St. Lawrence Alt 8620 3.1 5.3 58 7.2 6.6 109
Togwotee Pass 9580 25.4 18.1 140 25.9 19.6 132
Townsend Creek 8700 6.1 6.7 91 7.5 8.7 86
----- -----
Basin Index (%) 124 118
BIGHORN BASIN
Bald Mtn. 9380 17.3 15.0 115 12.3 13.3 92
Bear Trap Meadow 8200 7.9 4.5 176 8.6 6.2 139
Bone Springs Div 9350 15.5 12.3 126 11.8 11.9 99
Grave Springs 8550 5.4 7.0 77 4.5 8.0 56
Kirwin 9550 16.9 7.1 238 15.2 8.9 171
Marquette 8760 4.6 -M * 8.2 -M *
Middle Powder 7760 6.9 8.2 84 -M 8.8 *
Owl Creek 8975 3.4 4.0 85 5.2 4.4 118
Powder River Pass 9480 14.1 8.0 176 13.0 9.7 134
Shell Creek 9580 17.5 11.8 148 13.4 10.7 125
Timber Creek 7950 2.8 3.9 72 -M 5.3 *
----- -----
Basin Index (%) 132 115
SHOSHONE RIVER
Blackwater 9780 29.0 17.5 166 26.9 16.3 165
Evening Star 9200 35.0 19.4 180 31.1 22.3 139
Marquette 8760 4.6 -M * 8.2 -M *
Sylvan Road 7120 12.7 9.6 132 18.3 14.0 131
Younts Peak 8350 -M 11.7 * -M 12.8 *
----- -----
Basin Index (%) 165 145
POWDER RIVER
Bear Trap Meadow 8200 7.9 4.5 176 8.6 6.2 139
Cloud Peak Reservoir 9860 12.8 10.5 122 11.5 9.7 119
Grave Springs 8550 5.4 7.0 77 4.5 8.0 56
Hansen Sawmill 8360 6.7 4.7 143 8.0 6.2 129
Middle Powder 7760 6.9 8.2 84 -M 8.8 *
Powder River Pass 9480 14.1 8.0 176 13.0 9.7 134
Soldier Park 8720 5.6 -M * 7.8 -M *
----- -----
Basin Index (%) 125 115
TONGUE RIVER
Big Goose 7990 6.2 6.3 98 6.6 8.0 82
Bone Springs Div 9350 15.5 12.3 126 11.8 11.9 99
Burgess Junction 7880 7.5 8.4 89 6.9 9.1 76
Dome Lake 8880 12.0 8.8 136 9.4 10.0 94
Little Goose 8870 7.3 -M * 9.5 -M *
Sucker Creek 8880 8.3 9.1 91 6.4 10.7 60
Tie Creek 6870 3.5 4.4 80 7.0 8.6 81
----- -----
Basin Index (%) 108 83
BELLE FOURCHE
Cole Canyon 5910 5.5 4.9 112 7.6 7.2 106
----- -----
Basin Index (%) 112 106
CHEYENNE RIVER BASIN
Blind Park 6890 7.0 6.4 109 9.4 9.5 99
North Rapid Creek 6130 6.5 6.0 108 6.9 7.7 90
----- -----
Basin Index (%) 109 95
UPPER N. PLATTE
Arapaho Ridge 10960 16.1 16.9 95 15.8 17.9 88
Blackhall Mtn 9820 22.3 -M * 21.9 -M *
Columbine 9160 18.3 20.1 91 19.2 20.6 93
Divide Peak 8880 11.1 16.1 69 14.7 16.9 87
Joe Wright 10120 13.4 16.9 79 22.2 20.1 110
Laprele Creek 8375 5.4 7.8 69 6.9 9.4 73
Med Bow 10500 32.8 -M * 27.5 -M *
North French Creek 10130 21.9 21.2 103 21.7 21.2 102
Never Summer 10280 14.5 16.3 89 11.7 -M *
Old Battle 10000 20.7 24.2 86 20.1 28.1 72
Rawah 9020 9.0 8.8 102 12.2 11.0 111
Sage Creek Basin 7850 7.7 10.7 72 8.3 11.8 70
Sand Lake 10050 21.4 21.3 100 17.9 19.1 94
South Brush Creek 8440 8.1 10.4 78 9.6 11.8 81
Tower 10500 27.1 36.7 74 25.1 32.3 78
Webber Springs 9250 15.5 18.9 82 18.0 21.3 85
Willow Creek Pass 9540 10.6 9.7 109 11.4 10.5 109
Zirkel 9340 21.7 23.3 93 25.8 23.6 109
----- -----
Basin Index (%) 87 90
SWEETWATER
Deer Park 9700 9.1 10.9 83 12.0 15.4 78
Larsen Creek 9000 9.3 9.7 96 9.3 -M *
South Pass 9040 9.2 11.6 79 -M 13.6 *
----- -----
Basin Index (%) 86 78*
LOWER N. PLATTE
Casper Mtn. 7900 6.3 10.4 61 5.4 11.2 48
Laprele Creek 8375 5.4 7.8 69 6.9 9.4 73
Reno Hill 8400 7.8 10.3 76 8.8 11.2 79
Windy Peak 7900 5.1 5.8 88 6.6 7.8 85
----- -----
Basin Index (%) 72 70
LARAMIE RIVER
Brooklyn Lake 10240 19.8 15.3 129 20.4 16.2 126
Cinnabar Park 9574 18.4 17.3 106 20.9 19.8 106
Crow Creek 8330 2.5 6.8 37 8.1 7.9 103
Deadman Hill 10220 16.0 12.5 128 15.3 12.9 119
Rawah 9020 9.0 8.8 102 12.2 11.0 111
Roach 9700 11.3 12.6 90 14.3 14.8 97
----- -----
Basin Index (%) 105 110
S. PLATTE
Black Mountain 8920 7.5 -M * 10.2 -M *
Crow Creek 8330 2.5 6.8 37 8.1 7.9 103
Deadman Hill 10220 16.0 12.5 128 15.3 12.9 119
----- -----
Basin Index (%) 96 112
LITTLE SNAKE RIVER
Battle Mountain 7440 5.3 9.9 54 8.0 12.2 66
Divide Peak 8880 11.1 16.1 69 14.7 16.9 87
Elk River 8700 12.3 15.8 78 13.2 16.1 82
Little Snake River 8915 17.6 19.8 89 22.8 25.2 90
Old Battle 10000 20.7 24.2 86 20.1 28.1 72
Sage Creek Basin 7850 7.7 10.7 72 8.3 11.8 70
Sandstone RS 8150 7.2 10.7 67 6.9 15.2 45
Whiskey Park 8950 18.9 21.8 87 20.7 22.6 92
----- -----
Basin Index (%) 78 77
UPPER GREEN RIVER
Big Sandy Opening 9080 10.3 10.2 101 10.3 10.6 97
Blind Bull Sum 8650 27.0 18.2 148 16.4 16.1 102
East Rim Divide 7930 10.0 8.3 120 9.9 9.6 103
Elkhart Park G.S. 9400 10.0 9.5 105 9.6 10.6 91
Gros Ventre Summit 8750 10.8 10.0 108 11.2 10.2 110
Gunsight Pass 9820 12.7 10.7 119 12.5 10.9 115
Kendall R.S. 7740 12.6 9.9 127 13.0 11.8 110
Loomis Park 8240 14.4 11.9 121 15.1 14.2 106
New Fork Lake 8340 9.9 8.3 119 9.2 8.8 105
Pocket Creek 9360 7.1 -M * 6.9 -M *
Snider Basin 8060 10.9 9.9 110 12.6 11.7 108
Spring Creek Divide 9000 21.3 18.8 113 20.2 19.5 104
Triple Peak 8500 23.6 17.1 138 25.5 20.5 124
----- -----
Basin Index (%) 121 107
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.8 -M * 7.1 -M *
Buck Pasture 9632 8.8 -M * 9.8 -M *
EF Blacks Fork GS 9360 7.7 -M * -M -M *
Hams Fork 7840 7.6 9.4 81 7.5 9.2 82
Hewinta 9500 6.2 8.0 78 8.9 11.0 81
Hickerson Park 9122 5.9 6.0 98 5.4 7.6 71
Hole-in-Rock 9168 5.1 5.7 89 5.7 7.2 79
Indian Creek 9425 16.8 19.1 88 12.4 18.0 69
Kelley R.S. 8180 10.3 12.2 84 11.6 14.7 79
Spirit Lk 10235 6.1 -M * 7.6 -M *
Steel Creek Park 10158 9.8 11.7 84 10.5 12.6 83
----- -----
Basin Index (%) 86 77
UPPER BEAR RIVER
Bear River RS 8777 6.9 -M * 8.4 -M *
Bug Lake 7987 12.7 15.0 85 13.0 15.6 83
Burts Miller Ranch 8000 4.0 -M * 5.2 -M *
Chalk Creek #1 9171 11.0 18.6 59 12.4 19.8 63
Hayden Fork 9130 9.3 12.3 76 12.0 16.6 72
Kelley R.S. 8180 10.3 12.2 84 11.6 14.7 79
Lily Lake 9133 7.5 10.5 71 8.8 13.4 66
Monte Cristo 8932 15.7 21.5 73 15.7 20.8 75
Salt River Summit 7640 8.5 10.7 79 10.3 13.6 76
----- -----
Basin Index (%) 74 73
-----------------------------------------------------------------------------
-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.