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 WEDNESDAY: MARCH 14 , 2018
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 16.6 14.0 119 18.2 18.5 98
Black Bear 8170 38.4 31.9 120 35.7 33.5 107
Blind Bull Sum 8650 28.9 19.8 146 17.2 17.1 101
Cottonwood Creek 7670 18.9 18.7 101 21.0 21.1 100
East Rim Divide 7930 10.6 9.5 112 10.3 10.3 100
Grand Targhee 9260 40.5 32.4 125 26.5 26.1 102
Granite Creek 6770 16.1 14.8 109 17.8 17.7 101
Grassy Lake 7265 28.3 28.2 100 31.5 31.7 99
Gros Ventre Summit 8750 12.2 11.0 111 12.2 11.0 111
Gunsight Pass 9820 13.6 11.7 116 13.4 11.8 114
Lewis Lake Divide 7850 34.4 27.0 127 35.1 31.1 113
Phillips Bench 8200 22.3 21.6 103 23.0 24.5 94
Salt River Summit 7640 9.4 11.5 82 10.8 14.4 75
Snake River Station 6920 17.0 15.2 112 21.3 19.9 107
Spring Creek Divide 9000 22.5 19.9 113 21.3 20.7 103
Thumb Divide 7980 17.4 13.5 129 16.8 16.0 105
Togwotee Pass 9580 27.9 19.8 141 28.3 21.0 135
Two Ocean Plateau 9240 33.6 23.4 144 26.2 23.6 111
Willow Creek 8080 29.2 24.5 119 30.1 29.0 104
Younts Peak 8350 -M 12.7 * -M 13.6 *
----- -----
Basin Index (%) 119 104
MADISON-GALLATIN
Black Bear 8170 38.4 31.9 120 35.7 33.5 107
Canyon 7870 15.8 11.6 136 17.8 14.2 125
Madison Plateau 7750 24.5 19.7 124 24.1 23.1 104
West Yellowstone 6700 12.8 9.9 129 15.5 12.5 124
Whiskey Creek 6800 14.9 13.5 110 17.1 17.6 97
----- -----
Basin Index (%) 123 109
YELLOWSTONE
Beartooth Lake 9360 35.9 18.6 193 31.4 17.1 184
Burnt Mtn 5880 6.9 4.4 157 13.1 10.4 126
Canyon 7870 15.8 11.6 136 17.8 14.2 125
Cole Creek 7850 12.7 11.4 111 8.2 10.2 80
Evening Star 9200 37.0 21.4 173 31.6 23.6 134
Fisher Creek 9100 47.6 27.5 173 41.9 27.6 152
Northeast Entrance 7350 13.4 8.7 154 16.3 10.6 154
Parker Peak 9400 30.2 17.0 178 24.0 15.2 158
Sylvan Lake 8420 21.9 17.3 127 23.6 19.3 122
Thumb Divide 7980 17.4 13.5 129 16.8 16.0 105
Two Ocean Plateau 9240 33.6 23.4 144 26.2 23.6 111
White Mill 8700 37.5 19.4 193 28.5 20.5 139
Wolverine 7650 20.0 8.9 225 19.0 10.6 179
----- -----
Basin Index (%) 162 136
WIND RIVER
Burroughs Creek 8750 14.5 -M * 16.6 -M *
Castle Creek 8400 7.9 -M * 9.0 -M *
Cold Springs 9630 8.6 6.1 141 8.9 8.2 109
Deer Park 9700 9.5 12.3 77 12.5 16.6 75
Hobbs Park 10100 14.1 11.1 127 12.2 10.6 115
Kirwin 9550 17.8 8.0 222 16.3 9.6 170
Little Warm 9370 13.6 8.9 153 14.3 10.7 134
Owl Creek 8975 3.6 4.4 82 5.3 4.7 113
South Pass 9040 9.5 12.8 74 -M 14.7 *
St. Lawrence Alt 8620 3.1 5.9 53 7.1 7.2 99
Togwotee Pass 9580 27.9 19.8 141 28.3 21.0 135
Townsend Creek 8700 6.0 7.6 79 7.5 9.5 79
----- -----
Basin Index (%) 117 115
BIGHORN BASIN
Bald Mtn. 9380 18.1 16.1 112 12.7 14.2 89
Bear Trap Meadow 8200 8.3 4.8 173 8.6 6.7 128
Bone Springs Div 9350 16.1 13.5 119 12.0 12.8 94
Grave Springs 8550 5.6 7.7 73 4.5 8.5 53
Kirwin 9550 17.8 8.0 222 16.3 9.6 170
Marquette 8760 5.1 -M * 8.7 -M *
Middle Powder 7760 7.3 9.0 81 -M 9.5 *
Owl Creek 8975 3.6 4.4 82 5.3 4.7 113
Powder River Pass 9480 14.4 8.7 166 13.3 10.4 128
Shell Creek 9580 18.1 12.4 146 13.6 11.3 120
Timber Creek 7950 2.9 4.1 71 -M 5.8 *
----- -----
Basin Index (%) 126 110
SHOSHONE RIVER
Blackwater 9780 31.2 19.5 160 29.2 17.5 167
Evening Star 9200 37.0 21.4 173 31.6 23.6 134
Marquette 8760 5.1 -M * 8.7 -M *
Sylvan Road 7120 13.4 10.1 133 19.4 14.7 132
Younts Peak 8350 -M 12.7 * -M 13.6 *
----- -----
Basin Index (%) 160 144
POWDER RIVER
Bear Trap Meadow 8200 8.3 4.8 173 8.6 6.7 128
Cloud Peak Reservoir 9860 13.1 12.1 108 11.4 10.6 108
Grave Springs 8550 5.6 7.7 73 4.5 8.5 53
Hansen Sawmill 8360 6.8 5.3 128 8.1 6.7 121
Middle Powder 7760 7.3 9.0 81 -M 9.5 *
Powder River Pass 9480 14.4 8.7 166 13.3 10.4 128
Soldier Park 8720 5.3 -M * 8.0 -M *
----- -----
Basin Index (%) 117 107
TONGUE RIVER
Big Goose 7990 6.3 7.3 86 6.7 8.6 78
Bone Springs Div 9350 16.1 13.5 119 12.0 12.8 94
Burgess Junction 7880 7.8 9.4 83 6.9 9.9 70
Dome Lake 8880 12.4 9.6 129 9.6 10.8 89
Little Goose 8870 7.5 -M * 9.7 -M *
Sucker Creek 8880 8.6 10.3 83 6.6 11.6 57
Tie Creek 6870 3.7 4.7 79 7.2 9.2 78
----- -----
Basin Index (%) 100 78
BELLE FOURCHE
Cole Canyon 5910 5.7 5.3 108 7.5 7.6 99
----- -----
Basin Index (%) 108 99
CHEYENNE RIVER BASIN
Blind Park 6890 6.8 7.0 97 9.5 10.2 93
North Rapid Creek 6130 6.5 6.4 102 7.0 8.2 85
----- -----
Basin Index (%) 99 90
UPPER N. PLATTE
Arapaho Ridge 10960 16.6 17.9 93 16.4 18.9 87
Blackhall Mtn 9820 23.6 -M * 22.9 -M *
Columbine 9160 19.7 21.4 92 19.8 22.1 90
Divide Peak 8880 11.6 17.2 67 15.1 18.3 83
Joe Wright 10120 13.9 18.7 74 23.0 21.8 106
Laprele Creek 8375 5.5 8.8 62 6.9 10.3 67
Med Bow 10500 34.1 -M * 27.9 -M *
North French Creek 10130 22.7 23.7 96 22.2 22.8 97
Never Summer 10280 14.8 17.3 86 11.9 -M *
Old Battle 10000 21.5 26.0 83 21.2 30.3 70
Rawah 9020 9.1 9.2 99 12.4 11.6 107
Sage Creek Basin 7850 7.9 11.8 67 8.5 12.6 67
Sand Lake 10050 22.0 23.2 95 18.7 20.7 90
South Brush Creek 8440 8.2 11.2 73 9.7 12.8 76
Tower 10500 28.6 38.7 74 26.0 34.4 76
Webber Springs 9250 16.4 20.4 80 18.8 23.0 82
Willow Creek Pass 9540 10.7 10.4 103 11.6 11.2 104
Zirkel 9340 23.6 25.4 93 27.1 24.8 109
----- -----
Basin Index (%) 84 87
SWEETWATER
Deer Park 9700 9.5 12.3 77 12.5 16.6 75
Larsen Creek 9000 9.5 10.6 90 9.5 -M *
South Pass 9040 9.5 12.8 74 -M 14.7 *
----- -----
Basin Index (%) 80 75*
LOWER N. PLATTE
Casper Mtn. 7900 6.4 11.7 55 5.4 12.2 44
Laprele Creek 8375 5.5 8.8 62 6.9 10.3 67
Reno Hill 8400 7.9 11.4 69 9.0 12.3 73
Windy Peak 7900 5.1 6.7 76 6.8 8.7 78
----- -----
Basin Index (%) 65 65
LARAMIE RIVER
Brooklyn Lake 10240 20.7 17.2 120 21.3 17.7 120
Cinnabar Park 9574 19.1 17.8 107 21.6 20.8 104
Crow Creek 8330 2.3 7.1 32 8.2 8.5 96
Deadman Hill 10220 16.2 13.3 122 15.6 14.3 109
Rawah 9020 9.1 9.2 99 12.4 11.6 107
Roach 9700 11.5 13.5 85 14.5 16.2 90
----- -----
Basin Index (%) 101 105
S. PLATTE
Black Mountain 8920 7.7 -M * 10.4 -M *
Crow Creek 8330 2.3 7.1 32 8.2 8.5 96
Deadman Hill 10220 16.2 13.3 122 15.6 14.3 109
----- -----
Basin Index (%) 91 104
LITTLE SNAKE RIVER
Battle Mountain 7440 5.6 10.8 52 8.2 13.1 63
Divide Peak 8880 11.6 17.2 67 15.1 18.3 83
Elk River 8700 13.2 17.1 77 13.9 17.3 80
Little Snake River 8915 18.1 20.5 88 23.6 26.1 90
Old Battle 10000 21.5 26.0 83 21.2 30.3 70
Sage Creek Basin 7850 7.9 11.8 67 8.5 12.6 67
Sandstone RS 8150 7.1 11.6 61 7.1 16.2 44
Whiskey Park 8950 20.5 23.7 86 21.7 24.2 90
----- -----
Basin Index (%) 76 75
UPPER GREEN RIVER
Big Sandy Opening 9080 10.7 11.0 97 10.5 11.4 92
Blind Bull Sum 8650 28.9 19.8 146 17.2 17.1 101
East Rim Divide 7930 10.6 9.5 112 10.3 10.3 100
Elkhart Park G.S. 9400 10.5 10.3 102 10.2 11.4 89
Gros Ventre Summit 8750 12.2 11.0 111 12.2 11.0 111
Gunsight Pass 9820 13.6 11.7 116 13.4 11.8 114
Kendall R.S. 7740 13.4 10.8 124 13.5 12.6 107
Loomis Park 8240 15.3 12.9 119 15.9 15.1 105
New Fork Lake 8340 10.4 9.1 114 -M 9.4 *
Pocket Creek 9360 7.0 -M * 7.1 -M *
Snider Basin 8060 11.6 10.7 108 13.3 12.4 107
Spring Creek Divide 9000 22.5 19.9 113 21.3 20.7 103
Triple Peak 8500 25.3 18.9 134 27.1 21.9 124
----- -----
Basin Index (%) 119 106
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.1 -M * 7.2 -M *
Buck Pasture 9632 9.0 -M * 10.0 -M *
EF Blacks Fork GS 9360 9.2 -M * -M -M *
Hams Fork 7840 8.1 10.0 81 7.9 9.7 81
Hewinta 9500 6.9 8.9 78 9.3 11.8 79
Hickerson Park 9122 5.7 6.6 86 5.5 8.4 65
Hole-in-Rock 9168 5.2 6.2 84 5.9 7.8 76
Indian Creek 9425 18.1 20.6 88 13.3 19.3 69
Kelley R.S. 8180 11.2 12.9 87 12.3 15.6 79
Spirit Lk 10235 6.3 -M * 7.8 -M *
Steel Creek Park 10158 12.0 12.9 93 10.9 13.7 80
----- -----
Basin Index (%) 86 75
UPPER BEAR RIVER
Bear River RS 8777 7.0 -M * 8.6 -M *
Bug Lake 7987 13.2 16.4 80 13.4 16.8 80
Burts Miller Ranch 8000 4.0 -M * 5.4 -M *
Chalk Creek #1 9171 11.7 20.4 57 13.0 21.3 61
Hayden Fork 9130 9.7 13.9 70 12.5 17.8 70
Kelley R.S. 8180 11.2 12.9 87 12.3 15.6 79
Lily Lake 9133 7.2 11.3 64 8.9 14.5 61
Monte Cristo 8932 16.7 23.3 72 16.4 22.3 74
Salt River Summit 7640 9.4 11.5 82 10.8 14.4 75
----- -----
Basin Index (%) 72 71
-----------------------------------------------------------------------------
-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.